[go: up one dir, main page]

WO2008098409A1 - Procédé d'enrobage d'un film composite contenant du soufre - Google Patents

Procédé d'enrobage d'un film composite contenant du soufre Download PDF

Info

Publication number
WO2008098409A1
WO2008098409A1 PCT/CN2007/000468 CN2007000468W WO2008098409A1 WO 2008098409 A1 WO2008098409 A1 WO 2008098409A1 CN 2007000468 W CN2007000468 W CN 2007000468W WO 2008098409 A1 WO2008098409 A1 WO 2008098409A1
Authority
WO
WIPO (PCT)
Prior art keywords
sulfur
film layer
coating
containing mixture
fertilizer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/000468
Other languages
English (en)
Chinese (zh)
Inventor
Zongrong Ying
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing University of Science and Technology
Original Assignee
Nanjing University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing University of Science and Technology filed Critical Nanjing University of Science and Technology
Priority to PCT/CN2007/000468 priority Critical patent/WO2008098409A1/fr
Publication of WO2008098409A1 publication Critical patent/WO2008098409A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/0243—Other after-treatment of sulfur
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/30—Layered or coated, e.g. dust-preventing coatings
    • C05G5/36—Layered or coated, e.g. dust-preventing coatings layered or coated with sulfur

Definitions

  • the invention relates to a preparation method of a sulfur-containing coated slow-release fertilizer, in particular to a coating method of a sulfur-containing mixture film layer in a coated slow-release fertilizer containing a sulfur-containing mixture film layer, which belongs to the preparation of slow-release fertilizer.
  • Technical field. Background technique
  • Slow release fertilizer is the development direction of agricultural fertilizer. At present, one of the key points in the research and development of slow-release fertilizers is to reduce costs and obtain a long release period to broaden the application fields of current slow-release fertilizers.
  • Coated slow release fertilizer is an important direction for slow release fertilizer.
  • the coatings are polymers, low molecular weight organics, sulfur and fillers, among which sulfur and fillers are inexpensive, so sulfur and fillers are often used in the envelope of coated slow release fertilizers to reduce costs.
  • the addition of sulphur and fillers to the polymer or low molecular weight organic film layer usually affects the release period of the coated slow release fertilizer.
  • the addition of sulphur and non-permeable filler generally extends the release period.
  • US 6,617,412 discloses a process for preparing a polyurethane-containing sulfur-containing film-coated slow-release fertilizer which is prepared by mixing sulfur in a reactant isocyanate monomer or a polyol monomer into an isocyanate ester.
  • a sulfur-containing mixture or a polyol-containing monomer mixture a sulfur-containing mixture or a polyol-containing monomer mixture, and then repeatedly coating an isocyanate component (isocyanate monomer or isocyanate monomer sulfur-containing mixture) and a polyol monomer component (polyol monomer or polyol) on the surface of the fertilizer
  • the monomer-containing sulfur-containing mixture forms a polyurethane-containing sulfur mixture film layer on the surface of the fertilizer, and finally obtains a coated slow-release fertilizer coated with a polyurethane sulfur-containing mixture film layer.
  • the amount of sulfur added in the isocyanate monomer or the polyol monomer cannot be too high, and the amount of sulfur added in the patent is 30. % ⁇ 80%, ideally 50%.
  • the sulfur content in the film layer of the sulfur-containing mixture of the thermosetting polymer may not be too high, otherwise it may be caused by The fluidity of the coating liquid is seriously deteriorated and the coating cannot be carried out; and, the method disclosed above is used to form a sulfur content gradient distribution in the sulfur-containing mixture film layer, especially when the sulfur content is high, a sulfur content gradient is formed. Cloth is very difficult.
  • the prior art employs a method in which a mixture of sulfur powder and a coating material is coated to form a film layer containing a sulfur mixture.
  • the sulfur powder is a solid filler, the bonding property which sulfur itself can have cannot be exhibited, and therefore even When the polymer solution is coated, the sulfur content should not be too high. Otherwise, the polymer bonding force alone is not enough to bond the sulfur powder well to form a continuous coating with suitable mechanical properties, and the sulfur powder content is excessive. High, the polymer solution must use too much solvent to make the coating liquid have suitable fluidity, which is also disadvantageous. Summary of the invention
  • An object of the present invention is to provide a coating method for a sulfur-containing mixture film layer which is convenient, easy to adjust, high in sulfur content, and easy to be stepped.
  • a technical solution for achieving the object of the present invention is as follows:
  • a coating method of a sulfur-containing mixture film layer is to simultaneously apply molten sulfur and an organic coating liquid to the surface of the fertilizer, respectively, so that the molten sulfur and the organic coating liquid are in the fertilizer.
  • the surface is composited and further solidified to form a sulfur-containing mixture film layer comprising sulfur and organic matter.
  • the organic matter described herein may be a polymer and/or a low molecular weight organic material, and the fertilizer surface may be a pure fertilizer surface or a pre-coated fertilizer surface.
  • the coating method of the sulfur-containing mixture film layer of the present invention it is preferred to apply molten sulfur to the surface of the fertilizer by spraying.
  • the average mass fraction of the sulphur may be from 0.1% to 99. 9%.
  • the present invention has the following significant advantages: (1) In the coating method of the sulfur-containing mixture film layer of the present invention, sulfur is a molten sulfur at the time of coating, and sulfur can exert a bonding property even if a sulfur-containing mixture film When the sulfur content of the layer is high and sulfur is the main component, since the sulfur can be bonded to each other in the molten state, the film layer can still have good mechanical properties, and the fluidity of the coating material does not exist when the sulfur content is high.
  • the coating method of the sulfur-containing mixture film layer of the present invention the heat of the molten sulfur can be directly used for curing the polymer in the polymer sulfur-containing mixture film layer, for example
  • the solvent of the thermoplastic polymer solution volatilizes and solidifies or cures by thermal crosslinking of the thermosetting polymer prepolymer to reduce energy consumption
  • the coating method of the sulfur-containing mixture film layer of the present invention can be controlled by controlling molten sulfur and organic substances
  • the coating rate ratio of the membrane fluid (such as spray flow ratio), it is easy to form a meaningful sulfur content gradient distribution in the sulfur-containing mixture membrane layer, For example, from the inside to the outside, the sulphur content gradient is low in the middle, high to low or low to high, wherein the height can be as high as 100%, and the low can be as low as 0°/.
  • the gradient distribution can still have relatively high mechanical properties in the case of a high sulfur content in the sulfur-containing mixture membrane layer, which can increase the low sulfur content and reduce the coating thickness to reduce the slow release fertilizer.
  • the product cost, and the release period of the slow release fertilizer is long; the sulfur content gradient distribution can also be used in the sulfur-containing mixture membrane layer, and the sulfur content is very high in the sulfur-containing mixture membrane layer.
  • High barrier layer, long release period of slow release fertilizer) (4)
  • the coating method of the sulfur-containing mixture membrane layer of the invention has wide application range, is convenient and easy, and eliminates sulfur and polymer (or prepolymerization) The reaction with the low molecular weight organic matter, the process flow is reduced, and the process cost is low. detailed description
  • the coating method of the sulfur-containing mixture membrane layer is characterized in that the molten sulfur and the organic coating solution are simultaneously applied to the surface of the fertilizer, so that the molten sulfur and the organic coating solution are compounded on the surface of the fertilizer, and then solidified to form sulfur and A film layer of a sulfur-containing mixture of organic matter.
  • the organic matter may be a polymer and/or a low molecular weight organic material, and the fertilizer surface may be a pure fertilizer surface or a pre-coated fertilizer surface.
  • the molten sulfur is preferably applied to the surface of the fertilizer by spraying.
  • the organic coating liquid is also preferably applied to the surface of the fertilizer by spraying. That is, the coating method of the sulfur-containing mixture film layer of the present invention is preferably: spraying the molten sulfur onto the surface of the fertilizer while spraying the organic coating liquid from the other nozzle to the surface of the fertilizer to melt the sulfur and the organic matter.
  • the coating liquid is compounded on the surface of the fertilizer and further solidified to form a sulfur-containing mixture film layer containing sulfur and organic matter.
  • molten sulfur and an organic coating solution to the surface of the fertilizer in other ways.
  • the film of the sulfur-containing mixture in the envelope-type slow-release fertilizer coating is prepared by using a drum coating device, the molten sulfur is sprayed on the surface of the fertilizer in the drum, and the rotation is continuously measured.
  • the drum is poured into the organic coating liquid, and the rotating drum will continuously apply the poured organic coating liquid on the surface of the fertilizer to be combined with the sprayed molten sulfur on the surface of the fertilizer.
  • the sulfur-containing mixture film layer of the present invention comprises a film layer of a mixture of sulfur and a polymer, a film layer of a mixture of sulfur and a low molecular weight organic substance, and a sulfur, a mixed film layer of a polymer and a low molecular weight organic substance, and the like.
  • the coating method of the sulfur-containing mixture film layer of the invention can be used for sulfur and unsaturated polyester, epoxy resin, thermosetting polyurethane, unsaturated oil, phenolic resin, amino resin, butadiene rubber, natural rubber, polyisoprene Rubber, styrene butadiene rubber, butyl rubber, ethylene propylene rubber and EPDM rubber Coating of a sulfur-containing mixture film layer composed of one or more thermosetting polymers such as nitrile rubber.
  • sulfur and polyolefin polystyrene and its copolymers, polyvinyl chloride and its copolymers, acrylonitrile-butadiene-styrene copolymer, thermoplastic polyurethane, thermoplastic polyester, polyamide and nitrocellulose.
  • Coating of a sulfur-containing mixture film layer of one or more thermoplastic polymers It can also be used for the coating of a sulfur-containing mixture film layer having one or more thermoplastic polymers and one or more thermosetting polymers.
  • the low sulfur molecular organics may also be present in the sulfur-containing mixture film layer comprising sulfur and polymer as described herein.
  • the coating liquid for forming the polymer in the sulfur-containing mixture film layer may be a melt, a solution or a dispersion of the thermoplastic polymer. form.
  • the coating liquid for forming the polymer in the sulfur-containing mixture film layer may be a melt, a solution or a dispersion of the prepolymer.
  • the form may also be in the form of a melt, a solution or a dispersion of a reaction composition (monomer composition, prepolymer composition) which can react to form a polymer.
  • the coating liquid may be in a uniform form or in separate forms thereof, for example, the coating liquid of the thermoplastic polymer is a solution, and The coating liquid to form the thermosetting polymer is a prepolymer melt, which are each applied to the surface of the fertilizer simultaneously or sequentially, respectively, and finally combined with each other or with molten sulfur on the surface of the fertilizer.
  • the coating method of the sulfur-containing mixture film layer of the invention can also be used for sulfur and low molecular weight organic substances (for example, waxes having a melting point higher than room temperature and mixtures thereof, asphalt and mixtures thereof, and rosin or rosin esters and mixtures thereof, having a melting point higher than room temperature Coating of a sulfur-containing mixture film layer of a low molecular weight polymer such as polyethylene wax.
  • the low molecular weight organic matter in the sulfur-containing mixture film layer may be a single low molecular weight organic substance or may contain more than one low molecular weight organic substance.
  • the coating liquid for forming the low molecular weight organic substance in the sulfur-containing mixture film layer may be in the form of a melt, a solution or a dispersion of a low molecular weight organic substance, or may be a melt, a solution or a reaction composition of a reaction composition which can react to form a low molecular weight organic substance.
  • a dispersion or the like it may also be in the form of a melt, a solution or a dispersion of a mixture of a plurality of low molecular weight organic substances which ultimately forms a low molecular weight organic substance in the film layer of the sulfur-containing mixture.
  • the low molecular weight organic coating liquid is usually in the form of a melt.
  • a polymer or a low molecular weight organic substance in a sulfur-containing mixture film layer is formed by reacting more than one reactant (for example, a thermosetting polymer is formed by reacting one or more prepolymers or more than one monomer, and it is also possible Involving curing agents, catalysts, etc., may be to mix all the components of the reactants (including the reaction aid) to form a mixed coating liquid to the surface of the fertilizer, or may be The reactants are respectively applied to the surface of the fertilizer at the same time or sequentially, and the components in the reaction composition may be separately coated on the surface of the fertilizer, and some components are mixed to form a mixed coating liquid and then coated on the surface of the fertilizer. , can also be other ways.
  • the sulfur-containing mixture film layer is a film layer formed by combining one or more polymers with sulfur, or a film layer formed by combining one or more low molecular weight organic substances with sulfur, or a polymer
  • a low molecular weight organic substance polymer
  • the low molecular weight organic matter can be formed by one or more layers formed by combining sulfur with sulfur, more than one polymer, one or more low molecular weight organic substances or polymers and low molecular weight organic substances may be formulated into a mixed coating liquid to the surface of the fertilizer. Coating, it can also be formulated into several coating liquids, each of which is coated on the surface of the fertilizer.
  • thermosetting polymer in the film layer of the sulfur-containing mixture involves more than one reactant (including an auxiliary agent)
  • all the reactants (including the auxiliary agent) may be formulated into a mixed coating liquid to be applied to the surface of the fertilizer. It can be formulated into several coating liquids, each of which is coated on the surface of the fertilizer. Of course, there are other ways.
  • the coating liquid for forming the polymer in the sulfur-containing mixture film layer and the coating liquid for forming the low molecular weight organic substance in the sulfur-containing mixture film layer may be separately coated, or the low molecular weight organic matter may be mixed into the coating liquid for forming the polymer in the sulfur-containing mixture film layer to be applied to the fertilizer surface.
  • a method of applying a low molecular weight organic substance to a coating liquid for forming a polymer in a film layer containing a sulfur mixture together with a surface of a fertilizer is generally employed.
  • the sulfur-containing mixture film layer may contain a solid filler in addition to sulfur, a polymer, and a low molecular weight organic substance.
  • the solid filler may be introduced into the sulfur-containing mixture membrane layer by mixing the solid filler in the molten sulfur, or by mixing the solid filler in the coating liquid for forming the organic substance in the sulfur-containing mixture membrane layer, or may be At the same time, the solid filler is mixed in the molten sulfur and the coating liquid for forming the organic substance in the sulfur-containing mixture film layer, so that the solid filler enters with the molten sulfur and the coating liquid for forming the organic substance in the sulfur-containing mixture film layer.
  • the sulfur-containing mixture is in the film layer.
  • a solid filler to the coating equipment during or after the application of the molten sulfur and the coating of the organic coating liquid to the surface of the fertilizer, such as a drum coating device, with the flow of fertilizer particles in the coating device.
  • the solid filler is adhered to the film layer of the sulfur-containing mixture.
  • spray a solid filler into the film of the sulfur-containing mixture during or after the application of the molten sulfur and the coating of the organic coating liquid to the surface of the fertilizer.
  • other suitable methods can also be employed.
  • the fertilizer in the coating method of the sulfur-containing mixture film layer, in the process of coating the surface of the fertilizer with molten sulfur and coating the organic coating liquid, the fertilizer should be in a flowing state, for example, the fertilizer is in the fluidized bed envelope.
  • the device is in a boiling state, or the fertilizer is in a rolling state due to the rotation of the drum in the drum coating device, and the like.
  • the fertilizer is in a flowing state until the film layer of the sulfur-containing mixture solidifies.
  • the average mass fraction of the sulfur may be from 0.1% to 99.9%.
  • the coating method of the sulfur-containing mixture film layer of the present invention can be employed in the preparation of a coated slow-release fertilizer containing a sulfur-containing mixed film layer in the coating film. That is, it can be used in the preparation of a slow-release fertilizer coating film, which is a film-type slow-release fertilizer containing a sulfur-containing mixture film layer, or in the preparation of a sulfur-containing mixture film layer, which is only a partial film layer in a slow-release fertilizer coating (for example) One of the layers, two layers or several layers of film) is used as a coated slow release fertilizer.
  • the granular industrial urea with a particle size of 2. 0 ⁇ 4.0 is added to the fluidized bed coating equipment, and the granular urea is in a boiling state, and the granular urea temperature in the fluidized bed is maintained at 70 °C. 5:
  • the molar ratio of triethanolamine to diethylene glycol is 0. 15: 1
  • the melt and the molten sulfur at about 150 °C are sprayed from the three different nozzles simultaneously to the surface of the granular urea.
  • the spray flow ratio of the three different nozzles is controlled to make the NCO of the spray: -0H
  • the ratio of 1: 1: 1 1, the average mass fraction of sulfur in the formed polyurethane sulfur-containing mixture layer is 92%, and the quality of the film layer of the polyurethane-containing sulfur mixture is sprayed until the designed coating amount is reached (for example, the final product coating type is slow). 15% of the total urea release).
  • the polyurethane in the polyurethane sulfur-containing mixture film layer is sufficiently cured, that is, a coated slow-release urea obtained by coating a polyurethane sulfur-containing mixture film layer is prepared.
  • the granular industrial urea having a particle size of 2.0 to 1.0 is added to the fluidized bed coating device, and the granular urea is in a boiling state, and the temperature of the granular urea in the fluidized bed is maintained at 70 °C. 5: The mixture of 4, 4-diphenylmethane diisocyanate MDI, triethanolamine and diethylene glycol (containing a small amount of catalyst, triethanolamine: diethylene glycol molar ratio of 0.
  • the polyurethane in the polyurethane sulfur-containing mixture film layer is sufficiently cured, that is, a coated slow-release urea obtained by coating a polyurethane sulfur-containing mixture film layer is prepared.
  • the granular industrial urea with the particle size of 2. 0 ⁇ 4. 0 is added to the drum coating device with temperature control of 80 °C, and the rotating drum (rotation speed 40r/min) is used to make the granular urea flow in the drum.
  • the molten sulfur is sprayed from the two different nozzles simultaneously to the surface of the granular urea. By controlling the spray flow ratio, the average mass fraction of sulfur in the formed sulfur-containing sulfur compound mixture layer is 70%.
  • the epoxy resin sulphur mixture film quality reaches the designed coating amount (such as 12% of the total mass of the final product coated slow release urea). Then, stop spraying molten sulfur and continue spraying a mixture of CYD-115 epoxy resin prepolymer and mixed amine curing agent at about 60 °C (the mass ratio of epoxy resin prepolymer to mixed amine curing agent is theoretical ratio) The melt is sprayed until the quality of the formed epoxy film reaches the designed coating amount (for example, 2% of the total mass of the final product coated slow release urea). Finally, the epoxy resin in the envelope is sufficiently cured to prepare a coated slow release urea having a composite film of the epoxy-containing sulfur-containing mixture film and the epoxy resin film layer.
  • the designed coating amount such as 12% of the total mass of the final product coated slow release urea.
  • the granular industrial urea with a particle size of 2. ( ⁇ 4. 0mm was added to a drum coating device with a temperature control of 70 °C, and the rotating drum (rotation speed 40r/min) was used to make the granular urea flow in the drum, and the pressure inside the drum 0. 15MPa.
  • the quality of the unsaturated polyester sulfur-containing mixture formed by spraying reaches the design envelope The amount (such as 4% of the total mass of the final product coated slow release urea).
  • the unsaturated polyester in the unsaturated polyester sulfur-containing mixture film layer is fully cured, that is, the sulfur film layer and the unsaturated polyester are prepared.
  • Sulfur-containing mixture film layer composite package Film-coated slow release urea.
  • the granular industrial urea with a particle size of 2. ( ⁇ 4. 0mm was added to a drum coating device with a temperature control of 60 °C, and the rotating industrial drum (rotation speed 40r/min) was used to make the granular industrial urea flow in the drum. 150° The molten sulfur around C is slowly sprayed onto the surface of the granular urea, and sprayed until the quality of the formed sulfur film reaches the designed coating amount (such as 10% of the total mass of the final product coated slow-release urea).
  • the styrene-butadiene-styrene block copolymer cyclohexanide solution and the 15 CTC molten sulfur are respectively sprayed from the two different nozzles to the surface of the sulfur film layer (ie, the surface of the pre-coated fertilizer).
  • the spraying flow rate of sulfur and styrene-butadiene-styrene block copolymer is gradually reduced, so that the formed styrene-butadiene-styrene block copolymer sulfur-containing mixture film layer is formed.
  • the medium sulfur fraction has a gradient distribution, which is gradually changed from the initial sulfur mass fraction of 90% to the sulfur mass fraction at the end of the spraying, and the formed styrene-butadiene-styrene block copolymer
  • the film quality of the sulfur-containing mixture reaches the design coating amount (such as 7% of the total mass of the final product coated slow-release urea) and the average sulfur content in the sulfur-containing mixture of the styrene-butadiene-styrene block copolymer.
  • the mass fraction is 40%.
  • the cyclohexanide is sufficiently dried to obtain a coated slow release urea having a sulfur film layer and a styrene-butadiene-styrene block copolymer sulfur-containing mixture film composite coating.
  • the granular industrial urea having a particle size of 2. 0 to 4. 0 mm was placed in a drum coating device with a temperature control of 50 ° C, and a rotating drum (rotation speed of 40 r/min) was used to flow the granular industrial urea in the drum.
  • the molten sulfur at about 150 °C is slowly sprayed onto the surface of the granular urea, and sprayed until the quality of the formed sulfur film reaches the design coating amount (for example, 10% of the total mass of the final product-coated slow-release urea).
  • the granular industrial urea having a particle size of 2. 0 ⁇ 4. 0 is added to a drum coating device with a temperature control of 105 ° C, and the rotating drum (rotation speed 40 r / min) is used to make the granular urea flow in the rotating drum.
  • the molten sulfur of about 15 CTC is slowly sprayed onto the surface of the granular urea, and the 4, 4 - phenylene group at about 50 ° C is used.
  • a mixture of alkane diisocyanate MDI, triethanolamine and diethylene glycol containing a small amount of a catalyst, a molar ratio of triethanolamine: diethylene glycol is 0. 2: 1, -NC0: -0H molar ratio is 1.
  • the surface of the film layer until the quality of the PVC film reaches the design coating amount (such as 6% of the total mass of the final product coated slow release urea).
  • the solvent is sufficiently dried to remove the polyurethane in the film layer of the polyurethane sulfur-containing mixture, thereby preparing a film-type slow-release urea in which the polyurethane sulfur-containing mixture film layer and the polyvinyl chloride film layer are combined.
  • the granular industrial urea with a particle size of 2. ( ⁇ 4. Omm is added to a drum coating device with a temperature of 65 Torr, and the rotating drum (rotation speed 40 r/min) is used to make the granular urea flow in the drum.
  • the average mass fraction of sulfur in the formed bituminous sulfur-containing mixture layer is 70%, and the sprayed until the formed bituminous sulfur-containing mixture film quality reaches the design coating amount (such as the final product coating type) 4% of the total mass of the slow-release urea.
  • the epoxy resin in the epoxy-containing sulfur-containing mixture film layer is sufficiently cured, that is, the epoxy resin sulfur-containing mixture film layer and the asphalt sulfur-containing mixture film layer are prepared.
  • Membrane type slow release urea is

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)

Abstract

La présente invention concerne un procédé d'enrobage d'un film composite contenant du soufre. Le procédé consiste à enduire simultanément du soufre fondu et un liquide d'enrobage à base de matières organiques sur la surface d'un engrais, étape par laquelle le soufre fondu et le liquide d'enrobage se mélangent sur la surface, puis à faire durcir le mélange pour former un film composite contenant du soufre. De telles matières organiques peuvent être un polymère et/ou des matières organiques de faible masse moléculaire. L'enrobage par pulvérisation constituerait le meilleur mode d'application. Le procédé d'enrobage convient pour enrober un film composite contenant 0,1-99,9 % en poids de soufre. Les avantages constatés sont: sa facile mise en œuvre, un nombre réduit d'opérations, un faible coût, entre autres. Le procédé est applicable pour tous les engrais à libération lente enrobés contenant du soufre dans l'enrobage composite.
PCT/CN2007/000468 2007-02-12 2007-02-12 Procédé d'enrobage d'un film composite contenant du soufre Ceased WO2008098409A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/000468 WO2008098409A1 (fr) 2007-02-12 2007-02-12 Procédé d'enrobage d'un film composite contenant du soufre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/000468 WO2008098409A1 (fr) 2007-02-12 2007-02-12 Procédé d'enrobage d'un film composite contenant du soufre

Publications (1)

Publication Number Publication Date
WO2008098409A1 true WO2008098409A1 (fr) 2008-08-21

Family

ID=39689605

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/000468 Ceased WO2008098409A1 (fr) 2007-02-12 2007-02-12 Procédé d'enrobage d'un film composite contenant du soufre

Country Status (1)

Country Link
WO (1) WO2008098409A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1135745A (zh) * 1994-09-23 1996-11-13 阿冶乐西技术有限公司 用以制备改进的涂硫尿素缓释性肥料的方法
CN1281837A (zh) * 1999-07-23 2001-01-31 Rlc技术有限责任公司 改进的聚合物－硫－聚合物涂覆的肥料
US20030089150A1 (en) * 2001-10-12 2003-05-15 Markusch Peter H. Fertilizer encapsulation using sulfur containing polyols
CN1569774A (zh) * 2004-04-27 2005-01-26 山东农业大学 以硫为底涂层的高分子聚合物包膜控释肥料
CN1919508A (zh) * 1998-05-06 2007-02-28 H.C.施塔克公司 用气态镁还原有关氧化物制备的金属粉末
CN1955147A (zh) * 2005-10-28 2007-05-02 南京理工大学 硫复合包膜型缓释肥料

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1135745A (zh) * 1994-09-23 1996-11-13 阿冶乐西技术有限公司 用以制备改进的涂硫尿素缓释性肥料的方法
CN1919508A (zh) * 1998-05-06 2007-02-28 H.C.施塔克公司 用气态镁还原有关氧化物制备的金属粉末
CN1281837A (zh) * 1999-07-23 2001-01-31 Rlc技术有限责任公司 改进的聚合物－硫－聚合物涂覆的肥料
US20030089150A1 (en) * 2001-10-12 2003-05-15 Markusch Peter H. Fertilizer encapsulation using sulfur containing polyols
CN1569774A (zh) * 2004-04-27 2005-01-26 山东农业大学 以硫为底涂层的高分子聚合物包膜控释肥料
CN1955147A (zh) * 2005-10-28 2007-05-02 南京理工大学 硫复合包膜型缓释肥料

Similar Documents

Publication Publication Date Title
CN101597193B (zh) 包膜型颗粒物的制备方法
CN1246265C (zh) 以硫为底涂层的高分子聚合物包膜控释肥料的制备方法
JP3006774B2 (ja) 改善された硫黄被覆尿素遅緩放出性肥料の製造方法
CN102472024B (zh) 具有增强的粘结特性的路面结构
CZ20033038A3 (en) Hot-melt adhesive provided in the form of granulated material
JP2001072484A (ja) ポリマー−硫黄−ポリマーの改良型被覆肥料およびその形成方法
JP2012533007A5 (fr)
TW200831410A (en) Surface-modified, structurally modified fumed silicas
JP2013060605A (ja) 実質的に粘着付与剤を含まない熱膨張性材料
CN112980379B (zh) 一种耐湿热冲击的聚氨酯热熔胶及其制备方法
JPH01131704A (ja) ポリウレタンを主体とする被覆を設ける方法、ならびに遊戯場、運動場およびテニス場の被覆および填隙および吹き付け被覆
US4107100A (en) Porous, substantially foam-free composites
CN106436520A (zh) 将杂乱式铺置物施用于具有改善的粘附特性的路面结构
CN1958533B (zh) 聚合物乳液复合包膜型缓释肥料
WO2008098409A1 (fr) Procédé d'enrobage d'un film composite contenant du soufre
JPH082988A (ja) 遅効性被覆粒状肥料の製造方法
CN100475750C (zh) 复合包膜型缓释肥料
CN100475749C (zh) 含硫混合物膜层的涂覆方法
CN1948241B (zh) 聚合物复合包膜型缓释肥料
CN106436522B (zh) 粘附材料在对沥青有卓越粘附力的基底上的简便施用
CN107938466A (zh) 一种耐磨防滑塑胶跑道的制备方法
CN1939878B (zh) 采用水乳液型和/或水溶液型胶粘剂包膜肥料的方法
AU704560B2 (en) Coated fertilizer
CN1962570A (zh) 改进硫复合包膜型缓释肥料
CN1970510B (zh) 具有可控释放性能的硫包膜型缓释肥料及其制备方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07710895

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07710895

Country of ref document: EP

Kind code of ref document: A1