WO2002022259A1 - Verfahren zur regenerierung eines zeolith-katalysators - Google Patents
Verfahren zur regenerierung eines zeolith-katalysators Download PDFInfo
- Publication number
- WO2002022259A1 WO2002022259A1 PCT/EP2001/010490 EP0110490W WO0222259A1 WO 2002022259 A1 WO2002022259 A1 WO 2002022259A1 EP 0110490 W EP0110490 W EP 0110490W WO 0222259 A1 WO0222259 A1 WO 0222259A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catalyst
- regeneration
- zeolite
- reactor
- alkene
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/90—Regeneration or reactivation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/04—Gas or vapour treating; Treating by using liquids vaporisable upon contacting spent catalyst
- B01J38/12—Treating with free oxygen-containing gas
- B01J38/14—Treating with free oxygen-containing gas with control of oxygen content in oxidation gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/89—Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Definitions
- the present invention relates to a process for the regeneration of a zeolite catalyst and an integrated process for the production of an epoxide, in the context of which the regeneration according to the invention is carried out.
- the catalyst is used in suspension, it is first separated from the liquid reaction application and transferred to a regeneration device suitable for regeneration, where it is regenerated by thermal treatment in the presence of oxygen;
- the liquid phase is discharged or pumped out and the catalyst either in the reactor itself or regenerated in a different regeneration device by thermal treatment in the absence of oxygen.
- WO 98/18556 discloses a process for the regeneration of a titanium silicalite catalyst, the catalyst being flushed with a gas stream at a temperature of at least 130 ° C. in such a way that the mass-related residence time of the gas stream over the catalyst is less than 2 hours lies.
- the object of the present invention was to provide a further improved, in particular more effective process for the regeneration of zeolite catalysts which can be easily integrated into continuous and integrated processes for the preparation of epoxides of the type in question here, and which leads in particular to the opening or enclosure of the reactors without long downtimes and downtimes.
- this process should be suitable for the regeneration of zeolite catalysts which are used for oxidation in a fixed bed mode of operation.
- the present invention relates to a process for the regeneration of a zeolite catalyst which comprises a thermal treatment of the catalyst in the presence of a gas stream at temperatures above 120 ° C., the mass-related residence time of the gas stream above the catalyst during the thermal treatment being more than 2 hours is.
- mass-related residence time used according to the invention here denotes the ratio of the catalyst mass (M ⁇ a t) > divided by the mass flow (M gases ) of the gas used in the regeneration.
- the regeneration according to the invention is carried out so that the mass-related residence time of the regeneration gas is above 2 hours, preferably 3 to 10 hours and particularly preferably 4 to 6 hours.
- the procedure is generally such that the pressure drop across the reactor is not greater than 4 bar, preferably not greater than 3 bar and in particular not more than 2.5 bar.
- both catalysts in powder form which are used as a suspension, and packed in a fixed bed
- catalysts in the form of a shaped body such as, for example, as a strand or extrudate
- nets such as, for example, stainless steel, Kanthai or packs of crystallized catalysts and coated catalysts consisting of an inert core of SiO 2 , ⁇ -Al 2 O 3 , highly calcined TiO 2 , steatite and an active catalyst shell which comprises a zeolite.
- the catalyst If the catalyst was used in the suspension mode, it must first be separated from the reaction solution by a separation step, such as filtration or centrifugation.
- the powdery catalyst obtained in this way, at least partially deactivated, can then be fed to the regeneration.
- the Stages carried out during the regeneration process at elevated temperatures are preferably carried out in rotary tube furnaces with such powdered catalysts.
- the process according to the invention can also be used to regenerate catalysts as moldings, for example those which are packed in a fixed bed.
- the regeneration is preferably carried out in the conversion device itself, the catalyst not having to be removed or installed, so that it is not subject to any additional mechanical stress.
- the reaction is first interrupted, any reaction mixture present is removed, the regeneration is carried out and the reaction is then continued.
- the regeneration according to the invention proceeds essentially identically both in the regeneration of powdery catalysts and in the regeneration of catalysts in deformed form.
- the method according to the invention is particularly suitable for regeneration in a fixed bed reactor, in particular in a tube or tube bundle reactor.
- the terms “tube reactor” and “tube bundle reactor” describe combined parallel arrangements of a multiplicity of channels in the form of tubes, wherein the tubes can have any cross-section.
- the pipes are arranged in a fixed spatial relationship to one another, are preferably spatially spaced from one another and are preferably surrounded by a jacket which comprises all the tubes. In this way, for example, a heating or cooling medium can be passed through the jacket, so that all tubes are kept at an even temperature.
- the individual tubes within the preferably used tube or tube bundle reactor are more preferably approximately 0.5 to 15 m, more preferably 5 to 15 m, and in particular approximately 8 to 12 m long.
- the catalyst should preferably remain in the reactor during the regeneration.
- the regeneration process according to the invention can also be applied to zeolite catalysts which are used in a plurality of reactors which are connected in parallel or in series or (in each case in part) in parallel and in series.
- the regeneration according to the invention is carried out at temperatures above 120 ° C., preferably above 350 ° C. and in particular at 400 ° C. to 650 ° C.
- regeneration gases there are in principle no restrictions, as long as the regeneration can be carried out in such a way that the catalyst inside the reactor does not heat up, for example by burning off the organic deposits located thereon, in such a way that the pore structure thereof and / or Reactor itself is damaged.
- the regeneration is preferably carried out in such a way that a hot spot is formed within the catalyst bed and forms a temperature increase of 10 to 30 ° C., preferably not more than 20 ° C.
- suitable regeneration gases are oxygen-containing regeneration gases, such as, for example, air and gases which are essentially free of oxygen, oxygen-providing compounds and other oxidizing constituents.
- the regeneration gas contains oxygen
- its proportion in the regeneration gas is preferably less than 20% by volume, more preferably 0.1 to 10% by volume, in particular 0.1 to 5% by volume and even more preferably 0.1 up to 2 vol.% oxygen.
- a mixture of air and appropriate volumes of nitrogen is preferably used.
- oxygen-supplying substances used above includes all substances which are able to release oxygen or to remove carbon-containing residues under the specified regeneration conditions. Worthy of particular mention are:
- the regeneration is carried out at a temperature in the range from 500 ° C to 800 ° C.
- Zeolites are known to be crystalline aluminosilicates with ordered channel and cage structures that have micropores that are preferably smaller than approximately 0.9 nm.
- the network of such zeolites is made up of SiO 4 and AlO tetrahedra, which are connected by common oxygen bridges.
- An overview of the known structures can be found, for example, at WM Meier, DH Olson and Ch. Baerlocher, "Atlas of Zeolite Structure Types", Elsevier, 4th ed., London 1996.
- Zeolites are now also known which do not contain any aluminum and in which, in the silicate lattice, titanium (Ti) (3N) is sometimes used instead of Si (TV). These titanium zeolites, in particular those with a MFI-type crystal structure, and possibilities for their production are described, for example in EP-A 0 311 983 or EP-A 405 978.
- silicon and titanium such materials can also contain additional elements such as, for example, B. contain aluminum, zirconium, tin, iron, cobalt, nickel, gallium, boron or a small amount of fluorine.
- the titanium of the zeolite can be partially or completely replaced by vanadium, zirconium, chromium or whether or a mixture of two or more thereof.
- the molar ratio of titanium and or vanadium, zirconium, chromium or niobium to the sum of silicon and titanium and / or vanadium and / or zirconium, and / or chromium and / or niobium is generally in the range from 0.01: 1 to 0.1: 1.
- Titanium zeolites in particular those with an MFI-type aluminum structure, and possibilities for their production are described, for example, in WO 98/55228, WO 98/03394, WO 98/03395, EP-A 0 311 983 or EP-A 0 405 978, the scope of which is fully included in the context of the present application.
- Titanium zeolites with an MFI structure are known to be identified by a certain pattern in the determination of their X-ray diffraction patterns and additionally by a framework vibration band in the infrared region (ER) at about 960 cm “1 and thus differ from alkali metal titanates or crystalline and amorphous TiO 2 -Differentiate phases.
- ER infrared region
- zeolites containing titanium, germanium, tellurium, vanadium, chromium, niobium and zirconium with pentasil-zeolim structure in particular the types with X-ray assignment to ABW, ACO, AEI, AEL, AEN, AET, AFG, AFI, AFN, AFO, AFR, AFS, AFT, AFX, AFY, AHT, ANA, APC, APD, AST, ATN , ATO, ATS, ATT, ATV, AWO, AWW, BEA, BIK, BOG, BPH, BRE, CAN, CAS, CFI, CGF, CGS, CHA -, CHI, CLO, CON, CZP, DAC, DDR, DFO, DFT, DOH, DON, EAB, EDI, EMT, EPI, ERI, ESN, EUO, FAU, FER, GIS, GME, GOO, HEU, IFR
- Uranium-containing zeolites with the structure of ITQ-4, SSZ-24, TTM-1, UTD-1, CIT-1 or CIT-5 are also conceivable for use in the process according to the invention. Further titanium-containing zeolites are those with the structure of ZSM-48 or ZSM-12.
- Ti zeolites with an MFI, MEL or MFI / MEL mixed structure are to be regarded as particularly preferred for the process according to the invention.
- the Ti-containing zeolite catalysts which are generally referred to as "TS-1", “TS-2”, “TS-3”, and Ti zeolites with a framework structure isomorphic to ⁇ -zeolite are further preferred to call.
- the present invention also relates to a process as described above, characterized in that the catalyst is a titanium silicalite having the structure TS-1.
- the term “alkene” as used in the context of the present invention means all compounds which have at least one CC double bond.
- alkenes are mentioned as examples of such organic compounds with at least one C-C double bond:
- Alkenes containing 2 to 8 coblene atoms are preferably used in the process according to the invention. Ethene, propene and butene are particularly preferred. Propene is particularly preferably reacted.
- the present invention also relates to a process as described above or an integrated process as described above, characterized in that the alkene is propene.
- hydroperoxide encompasses all hydroperoxides, including hydrogen peroxide, reference being made to the state of the art with regard to the hydroperoxide solutions which can be used in the process according to the invention and their preparation of the technique.
- the anthraquinone process can be used, for example, according to which virtually the entire amount of hydrogen peroxide produced worldwide is produced.
- This process is based on the catalytic hydrogenation of an anthraquinone compound to the corresponding anthrahydroquinone compound, subsequent reaction thereof with oxygen to form hydrogen peroxide and subsequent separation of the hydrogen peroxide formed by extraction.
- the catalytic cycle is closed by renewed hydrogenation of the re-formed antlirachinone compound.
- At least one salt contained in the hydrogen peroxide solution can be removed from the hydrogen peroxide solution by means of ion exchange by a device, which is characterized in that the device has at least one non-acidic ion exchange bed with a flow cross-sectional area F and a Has height H, wherein the height H of the ion exchange bed is less than or equal to 2.5 • F and in particular less than or equal to 1.5 • F.
- non-acidic ion exchanger beds with a cation exchanger and / or anion exchanger can be used within the scope of the present invention.
- Cation and anion exchangers can also be used as so-called mixed beds within an ion exchange bed.
- only one type of non-acidic ion exchanger is used. It is further preferred to use a basic ion exchange, particularly preferably that of a basic anion exchanger and further particularly preferably that of a weakly basic anion exchanger.
- the present invention relates to a process for regenerating a zeolite catalyst, which comprises the following steps (1) to (4):
- This preferred regeneration process further preferably comprises the further stages (5) and / or (6):
- step (6) conditioning the catalyst obtained in step (4) or in step (5).
- the zeolite catalyst to be regenerated is generally a catalyst which is used in the oxidation of an alkene by reaction of the alkene with a hydroperoxide, preferably a reaction which has been carried out continuously, and must now be regenerated due to a drop in activity.
- the regeneration according to the invention is preferably carried out in the reactor (s) in which the reaction of the alkene with a hydroperoxide is also carried out in the presence of the catalyst to be regenerated.
- the reactor is operated in conjunction with the processing of the valuable product and the regeneration according to the invention, since this procedure allows a closed circuit of solvents.
- the first step of this embodiment of the regeneration according to the invention initially comprises washing the deactivated catalyst with a solvent.
- a solvent can be used in which the respective reaction product of the oxidation of the alkene dissolves well.
- solvents are preferably selected from the group consisting of water, an alcohol, preferably methanol, an aldehyde, an acid, such as, for example, formic acid, acetic acid or propionic acid, a nitrile, a hydrocarbon, a halogenated hydrocarbon.
- WO 98/55228 the content of which in this regard is included extensively in the context of the present application.
- Preferred solvents are those which are already present during the reaction, e.g. the epoxidation of olefin using the catalyst to be regenerated act as a solvent.
- examples of such epoxidation of olefins include: water, alcohols, e.g. Methanol, ethanol, 1-propanol, 2-propanol, 2-methyl-2-propanol,
- ketones e.g. Acetone, 2-butanone, 2-methyl-3-butanone, 2-pentanone, 3-pentanone, 2-methyl-4-pentanone or cyclohexanone.
- the solvent already used in the reaction is used as the solvent for the washing, its supply is continued and the catalyst is washed with the solvent at a temperature of generally 40 to 200 ° C., if appropriate with increasing temperature and under pressure.
- the washing is preferably continued until the content of the reaction product in the discharge is below 1% of the
- the solvent used is drained or pumped out of the reactor.
- the porous catalyst then also contains considerable amounts of adhering solvent, the majority of which is removed by drying with a gas stream at temperatures from -50 to 250 ° C., the temperature used being close to the boiling point of the solvent at the pressure desired in each case becomes.
- the temperatures are typically in the range of ⁇ 50 ° C above or below the boiling point.
- An inert gas such as nitrogen, argon, CO 2 , hydrogen, synthesis gas, methane, ethane or natural gas is generally used for drying. Nitrogen is preferably used.
- the gas laden with solvent is then either disposed of, for example by burning with a torch, or at a suitable point, for example when working up the reaction product from the process for oxidizing an alkane, and the solvent contained therein is recovered.
- the washing is carried out under pressure at a temperature above the boiling point of the solvent and, after the solvent has been released, the pressure is reduced to such an extent that part of the solvent is already present before or during the supply of gas for drying by the latent heat of the reactor evaporated.
- a gas and a liquid for example inside the jacket of a tubular reactor, can be used to supply heat within this step. It is preferred to use a liquid for the temperature range below 150 ° C. and a gas for the
- the catalyst to be regenerated is heated.
- This heating can be carried out by all methods familiar to the person skilled in the art, the heating preferably in the presence of an inert gas stream, e.g. Nitrogen, argon, methane, ethane or natural gas.
- the catalyst is located in the tubes of a tube bundle reactor.
- the heat is introduced into the system through the jacket space.
- the heating rate must be chosen so that there are no impermissibly high mechanical stresses in the reactor. Typical heating rates are 0.01 ° C / min to 0.2 ° C / min.
- the catalyst is then regenerated as described in detail in the context of the present application.
- the regenerated catalyst preferably the entire reactor with the regenerated catalyst located therein, can be cooled to a temperature of preferably below 200 ° C.
- the catalyst can still be conditioned in order to remove the heat of sorption of the solvent or the educts in a controlled manner before the catalyst is used again.
- the inert gas flowing past the catalyst is mixed with small amounts of a solvent, preferably the same solvent that has been used for the reaction or for washing the catalyst, in particular an alcohol, such as e.g. Methanol, mixed in and the solvent vapor-containing inert gas stream passed through the catalyst bed.
- the solvent content and the volume flow of the conditioning gas are selected so that the catalyst does not have an impermissible peak temperature.
- the temperature increase should not be more than 100 ° C above the average temperature of the heat exchanger, e.g. in the jacket space of a tubular reactor.
- the supply of conditioning gas is interrupted with solvent and the reactor, preferably the fixed bed reactor, is filled with liquid and put back into operation.
- the regenerated catalyst is preferably used again for the reaction of the alkene with the hydroperoxide.
- the regeneration according to the invention or the integrated process for the oxidation of an alkene for the conversion of propylene to propylene oxide by means of hydrogen peroxide, more preferably in methanolic solution can be used.
- the regeneration process according to the invention can, when using a fixed bed catalyst, be carried out without removing the catalyst in the reactor itself;
- the solvents used in the regeneration process according to the invention can be identical to the solvents during the reaction and can be completely circulated.
- Example 1 A TS-1 catalytic converter (in the form of 1.5 mm strands) was filled up to a bed height of 8 m (a total of 4480 g catalytic converter) in an upwardly open pipe with a length of 1.25 m and electrical auxiliary heating. Using a calibrated mass flow meter, at room temperature and at 400 ° C different mass flows of nitrogen passed through a reactor and the corresponding pressure loss measured over the bed height. The results are shown in the figure below as pressure loss vs. mass-related dwell time is shown. It can be seen from this that the pressure loss increases rapidly for mass-related residence times of less than 2 hours, in particular at the higher temperatures which are generally necessary for regeneration.
- the previous example was repeated with a bed height of 12 m.
- the reactor then contained a total of 6720 g of catalyst.
- the results are shown in the figure below as pressure loss vs. mass-related dwell time is shown. It can be seen from this that the pressure loss increases rapidly for mass-related dwell times of less than 2 hours and, as expected, even more than in Example 1.
- the mass-related residence time of the regeneration gas was 4.9 hours.
- the pressure loss across the bed was approximately 20 mbar.
- the heating was then switched on and the temperature was raised to 400 ° C. within 2 hours.
- the pressure loss across the bed rose to about 40 mbar.
- the temperature was then kept at 400 ° C. for a further 8 hours.
- the maximum observed temperature inside the bed (hot spot) was only 425 ° C.
- the catalyst was removed and analyzed.
- the carbon content was ⁇ 0.1% by weight.
- the regenerated catalyst showed the same activity and selectivity in propene epoxidation with hydrogen peroxide in methanol as a fresh catalyst.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/380,070 US6958304B2 (en) | 2000-09-11 | 2001-09-11 | Method for regenerating a zeolite catalyst |
| MXPA03002066A MXPA03002066A (es) | 2000-09-11 | 2001-09-11 | Metodo para regenerar un catalizador zeolitico. |
| EP01967330A EP1322416A1 (de) | 2000-09-11 | 2001-09-11 | Verfahren zur regenerierung eines zeolith-katalysators |
| AU2001287728A AU2001287728A1 (en) | 2000-09-11 | 2001-09-11 | Method for regenerating a zeolite catalyst |
| CA002421923A CA2421923A1 (en) | 2000-09-11 | 2001-09-11 | Process for the regeneration of a zeolite catalyst |
| BR0113830-8A BR0113830A (pt) | 2000-09-11 | 2001-09-11 | Processos para a regeneração de um catalisador de zeólito, e integrado para a oxidação de um alqueno |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10044798.8 | 2000-09-11 | ||
| DE10044798A DE10044798A1 (de) | 2000-09-11 | 2000-09-11 | Verfahren zur Regenerierung eines Zeolith-Katalysators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002022259A1 true WO2002022259A1 (de) | 2002-03-21 |
Family
ID=7655753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2001/010490 Ceased WO2002022259A1 (de) | 2000-09-11 | 2001-09-11 | Verfahren zur regenerierung eines zeolith-katalysators |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US6958304B2 (de) |
| EP (1) | EP1322416A1 (de) |
| CN (1) | CN1190271C (de) |
| AU (1) | AU2001287728A1 (de) |
| BR (1) | BR0113830A (de) |
| CA (1) | CA2421923A1 (de) |
| DE (1) | DE10044798A1 (de) |
| MX (1) | MXPA03002066A (de) |
| RU (1) | RU2003110377A (de) |
| WO (1) | WO2002022259A1 (de) |
| ZA (1) | ZA200301923B (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW593126B (en) * | 2003-09-30 | 2004-06-21 | Prime View Int Co Ltd | A structure of a micro electro mechanical system and manufacturing the same |
| EP2600971A4 (de) | 2010-08-03 | 2014-12-24 | Aditya Birla Science And Technology Company Ltd | Verfahren zur regenerierung von silikatkatalysatoren |
| US20150004093A1 (en) * | 2013-07-01 | 2015-01-01 | Kior, Inc. | Method of rejuvenating biomass conversion chart |
| WO2015112399A1 (en) | 2014-01-21 | 2015-07-30 | Kior, Inc | Process of reactivating a metal contaminated biomass conversion catalyst |
| WO2016128538A1 (en) * | 2015-02-13 | 2016-08-18 | Basf Se | Process for the regeneration of a titanium zeolite catalyst for propylene epoxidation |
| ES2877670T3 (es) * | 2015-02-13 | 2021-11-17 | Basf Se | Procedimiento de regeneración de un catalizador de zeolita de titanio para la epoxidación de propileno |
| CN105214740A (zh) * | 2015-09-30 | 2016-01-06 | 广西大学 | 内部汽化膨胀法再生改性fcc废触媒及其应用 |
| CN105363499A (zh) * | 2015-12-02 | 2016-03-02 | 中国天辰工程有限公司 | 一种钛硅分子筛催化剂的原位再生方法 |
| EP3858477A4 (de) * | 2018-09-25 | 2022-06-29 | Sekisui Chemical Co., Ltd. | Verfahren zur wiederverwendung eines zeolithadsorbens und regeneriertes adsorbens |
| EP4037831A1 (de) * | 2019-09-30 | 2022-08-10 | Dow Global Technologies LLC | Metallsilikat-katalysator-lösungsmittelwäsche |
| CN112619629A (zh) * | 2020-12-25 | 2021-04-09 | 青岛华世洁环保科技有限公司 | 一种转轮再生方法 |
| CN116493001A (zh) * | 2023-04-10 | 2023-07-28 | 宁波中科远东催化工程技术有限公司 | 一种蒽醌氢化催化剂及其制备方法 |
| WO2025154106A1 (en) | 2024-01-17 | 2025-07-24 | Conser Spa | Process and apparatus for continuous epoxidation in liquid phase of propene |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0743094A1 (de) * | 1995-05-18 | 1996-11-20 | ARCO Chemical Technology, L.P. | Regenerierung eines titaniumenthaltenden Molekularsiebes |
| EP0790075A1 (de) * | 1996-02-13 | 1997-08-20 | ARCO Chemical Technology, L.P. | Regenerierung eines Titanium enthaltendenmolekularsiebes |
| WO1998018556A1 (fr) * | 1996-10-25 | 1998-05-07 | Solvay (Societe Anonyme) | Procede de regeneration de catalyseurs de type silicalite au titane |
| WO1998018555A1 (fr) * | 1996-10-25 | 1998-05-07 | Solvay | Procede de regeneration de catalyseurs |
| WO1998055228A1 (de) * | 1997-06-06 | 1998-12-10 | Basf Aktiengesellschaft | Verfahren zur regenerierung eines zeolith-katalysators |
| US6031116A (en) * | 1996-07-01 | 2000-02-29 | The Dow Chemical Company | Process for the direct oxidation of olefins to olefin oxides |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19607577A1 (de) * | 1996-02-29 | 1997-09-04 | Basf Ag | Netzkatalysator auf Basis von Titan- oder Vanadiumzeolithen und inerten Netzgeweben zur Beschleunigung von Oxidationsreaktionen |
-
2000
- 2000-09-11 DE DE10044798A patent/DE10044798A1/de not_active Withdrawn
-
2001
- 2001-09-11 BR BR0113830-8A patent/BR0113830A/pt not_active IP Right Cessation
- 2001-09-11 US US10/380,070 patent/US6958304B2/en not_active Expired - Fee Related
- 2001-09-11 WO PCT/EP2001/010490 patent/WO2002022259A1/de not_active Ceased
- 2001-09-11 RU RU2003110377/15A patent/RU2003110377A/ru not_active Application Discontinuation
- 2001-09-11 MX MXPA03002066A patent/MXPA03002066A/es active IP Right Grant
- 2001-09-11 CA CA002421923A patent/CA2421923A1/en not_active Abandoned
- 2001-09-11 CN CNB01817177XA patent/CN1190271C/zh not_active Expired - Fee Related
- 2001-09-11 AU AU2001287728A patent/AU2001287728A1/en not_active Abandoned
- 2001-09-11 EP EP01967330A patent/EP1322416A1/de not_active Ceased
-
2003
- 2003-03-10 ZA ZA200301923A patent/ZA200301923B/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0743094A1 (de) * | 1995-05-18 | 1996-11-20 | ARCO Chemical Technology, L.P. | Regenerierung eines titaniumenthaltenden Molekularsiebes |
| EP0790075A1 (de) * | 1996-02-13 | 1997-08-20 | ARCO Chemical Technology, L.P. | Regenerierung eines Titanium enthaltendenmolekularsiebes |
| US6031116A (en) * | 1996-07-01 | 2000-02-29 | The Dow Chemical Company | Process for the direct oxidation of olefins to olefin oxides |
| WO1998018556A1 (fr) * | 1996-10-25 | 1998-05-07 | Solvay (Societe Anonyme) | Procede de regeneration de catalyseurs de type silicalite au titane |
| WO1998018555A1 (fr) * | 1996-10-25 | 1998-05-07 | Solvay | Procede de regeneration de catalyseurs |
| WO1998055228A1 (de) * | 1997-06-06 | 1998-12-10 | Basf Aktiengesellschaft | Verfahren zur regenerierung eines zeolith-katalysators |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2001287728A1 (en) | 2002-03-26 |
| RU2003110377A (ru) | 2004-08-27 |
| BR0113830A (pt) | 2003-06-03 |
| MXPA03002066A (es) | 2003-10-14 |
| EP1322416A1 (de) | 2003-07-02 |
| US20030187286A1 (en) | 2003-10-02 |
| US6958304B2 (en) | 2005-10-25 |
| DE10044798A1 (de) | 2002-04-04 |
| CN1190271C (zh) | 2005-02-23 |
| CN1469776A (zh) | 2004-01-21 |
| CA2421923A1 (en) | 2003-03-11 |
| ZA200301923B (en) | 2004-03-10 |
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