[go: up one dir, main page]

WO2003011760A1 - Method for the precipitation of poorly-soluble materials such as barium sulphate for example and precipitation capsule - Google Patents

Method for the precipitation of poorly-soluble materials such as barium sulphate for example and precipitation capsule Download PDF

Info

Publication number
WO2003011760A1
WO2003011760A1 PCT/EP2002/007713 EP0207713W WO03011760A1 WO 2003011760 A1 WO2003011760 A1 WO 2003011760A1 EP 0207713 W EP0207713 W EP 0207713W WO 03011760 A1 WO03011760 A1 WO 03011760A1
Authority
WO
WIPO (PCT)
Prior art keywords
precipitation
capsule
capsules
inflow
poorly
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/EP2002/007713
Other languages
German (de)
French (fr)
Inventor
Udo Selter
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.)
Venator Germany GmbH
Original Assignee
Sachtleben Chemie GmbH
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
Priority to US10/485,227 priority Critical patent/US20040202608A1/en
Priority claimed from DE10229189A external-priority patent/DE10229189A1/en
Application filed by Sachtleben Chemie GmbH filed Critical Sachtleben Chemie GmbH
Priority to EP02764666A priority patent/EP1414749A1/en
Priority to JP2003516958A priority patent/JP2005505399A/en
Publication of WO2003011760A1 publication Critical patent/WO2003011760A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/462—Sulfates of Sr or Ba
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/2445—Stationary reactors without moving elements inside placed in parallel

Definitions

  • the invention relates to a process for the precipitation of poorly soluble substances, such as. B. barium sulfate, in which the desired sparingly soluble substance is formed by combining two individual components in a precipitation capsule by reacting the individual components with one another.
  • poorly soluble substances such as. B. barium sulfate
  • barium sulfate (BaS0 4 ) by precipitation from barium sulfide (BaS) or barium chloride (BaCI 2 ) with sodium sulfate solution (Na 2 S0 4 ) or sulfuric acid (H 2 S0 4 ) or barium hydroxide solution (Ba (OH) 2 ) with sulfuric acid (H 2 S0 4 ).
  • the precipitation ie the bringing together of the precipitation solutions as individual components in a specific precipitation apparatus, must take place in a specific manner.
  • the residence time in the felling machine is of crucial importance as one of the main parameters.
  • Other important precipitation parameters are the concentration and the temperature of the precipitant solutions.
  • the task was to simplify the felling process and thus the associated felling apparatus by redesigning, if possible as a closed apparatus without a stirrer and built-in parts, so that the required grain sizes (median value d 50 ) in the range from 0.1 to 2 ⁇ m are reproducibly permanent high BaS0 4 throughput (t / h) can be produced.
  • the capsules each have a lockable inflow for each individual component with free outflow into the static mixer, which opens into a common drain line.
  • a capsule according to the invention for use in the method just described is characterized in that each capsule has an inflow for a single component in the axial direction of the capsule and an inflow for the other individual component tangentially or at an acute angle to the longitudinal axis of the capsule.
  • the capsules are preferably made of plastic.
  • the falling capsules (falling volume ⁇ 1 to 100 l) are closed, round, cylindrical falling pieces with a conical inlet and outlet. Another inlet for the second precipitation component is arranged on the side.
  • the two precipitation components are fed separately via line systems that are connected to pumps.
  • the volume flows of barium- and sulfate-containing solution partly reach the respective capsule axially and tangentially via liquid distributors, whereby barium sulfate is precipitated spontaneously, which, under low pressure, is precipitated into the tube mixer (static mixer) and from there via a common drain line to the so-called precipitation tank (which in this case serves as a storage container).
  • the dwell time in the respective precipitating device depends on the size of the precipitate (volume of precipitation) of the capsule and the rate of precipitation (volume flow (m 3 / h)) of the precipitant solutions.
  • any desired grain size (median value d 5 o in the range of 0.1 to 2 ⁇ m) can be reliably set with otherwise unchanged precipitation parameters (essentially concentration and temperature).
  • the differently high rate of precipitation in the respective capsule at the same time ensures a spontaneous intensive mixing of the precipitation components, so that, from a reaction-kinetic point of view, there are no local concentration differences during precipitation which have an undesirable effect on the grain spectrum / median d 50 .
  • the decisive criterion is that the reaction component only comes into contact with each other shortly before entering the respective capsule - in the zone of highest turbulence - and the precipitate suspension thus produced is further homogenized in the downstream tube mixer, so that practically before it enters the actual precipitation container the precipitation is complete.
  • the capsules used according to the invention are e.g. B. also suitable for the production of barium carbonate, barium chromate and zinc sulfide.
  • FIGS. 1 and 2 are described below.
  • Fig. 1 shows several precipitators (capsules) in the composite system for the precipitation of poorly soluble substances, such as. B. barium sulfate.
  • the reference numeral 1 denotes precipitation capsules, each of which has a different precipitation volume, depending on the desired fineness of the product.
  • Each capsule 1 has an inflow A for the first individual component that can be shut off with a valve (labeled 2) and an inflow B for the second individual component that can be shut off with a valve (labeled 3).
  • Each precipitation capsule 1 has a static mixer with a free inflow and outflow 5, the respective processes passing through a common line 6 into the so-called precipitation container 7, which in this case is the storage container for the further process cut.
  • the precipitation capsules 1 are preferably made of plastic.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The invention relates to a precipitation method and corresponding precipitation capsules for the precipitation of poorly-soluble materials such as barium sulphate for example, whereby the desired poorly-soluble material is obtained by mixing two individual components in a precipitation capsule and reaction together of said individual components. According to the invention, precipitates with defined particle sizes in the range from 0.1 - 2 µm with high throughput may be achieved, whereby the precipitation is carried out continuously in one of the precipitation capsules with differing precipitation volumes (residence times) with subsequent homogenisation in a static mixer.

Description

Verfahren zur Fällung schwerlöslicher Stoffe, wie z. B. Bariumsulfat und Process for the precipitation of poorly soluble substances, such as. B. barium sulfate and

FällkapseiFällkapsei

Die Erfindung betrifft ein Verfahren zur Fällung schwerlöslicher Stoffe, wie z. B. Bariumsulfat, bei dem durch Zusammenführung zweier Einzelkomponenten in einer Fällkapsel durch Reaktion der Einzelkomponenten miteinander der gewünschte schwerlösliche Stoff entsteht.The invention relates to a process for the precipitation of poorly soluble substances, such as. B. barium sulfate, in which the desired sparingly soluble substance is formed by combining two individual components in a precipitation capsule by reacting the individual components with one another.

So wird entsprechend der Reaktionsgleichung 1, 2, 3 oder 4 (siehe unten) Bariumsulfat (BaS04) durch Fällung aus Bariumsulfid (BaS) oder Bariumchlorid (BaCI2) mit Natriumsulfatlösung (Na2S04) bzw. Schwefelsäure (H2S04) oder Bari- umhydroxidlösung (Ba(OH)2) mit Schwefelsäure (H2S04) hergestellt.Thus, according to reaction equation 1, 2, 3 or 4 (see below), barium sulfate (BaS0 4 ) by precipitation from barium sulfide (BaS) or barium chloride (BaCI 2 ) with sodium sulfate solution (Na 2 S0 4 ) or sulfuric acid (H 2 S0 4 ) or barium hydroxide solution (Ba (OH) 2 ) with sulfuric acid (H 2 S0 4 ).

1. BaS + Na2S04 → BaS04 + Na2S1. BaS + Na 2 S0 4 → BaS0 4 + Na 2 S

2. BaCI2 + Na2S04 → BaS04 + 2 NaCI2. BaCI 2 + Na 2 S0 4 → BaS0 4 + 2 NaCI

3. BaCI2 + H2S04 → BaS04 + 2 HCI3. BaCI 2 + H 2 S0 4 → BaS0 4 + 2 HCI

4. Ba(OH)2 + H2S04 → BaS04 + 2 H204. Ba (OH) 2 + H 2 S0 4 → BaS0 4 + 2 H 2 0

Urri eine gewünschte Korngröße (mittlerer Teilchendurchmesser, auch Medianwert (d50) genannt) und eine gewünschte Kornverteilung zu erhalten, muss die Fällung, d. h. das Zusammenbringen der Fälllösungen als Einzelkomponenten in einer bestimmten Fällapparatur in bestimmter Art und Weise erfolgen. Als einer der Hauptparameter ist die Verweilzeit im Fällapparat von entscheidender Be- deutung. Weitere wichtige Fällparameter sind die Konzentration und die Temperatur der Fällmittellösungen.In order to obtain a desired particle size (average particle diameter, also called median value (d 50 )) and a desired particle size distribution, the precipitation, ie the bringing together of the precipitation solutions as individual components in a specific precipitation apparatus, must take place in a specific manner. The residence time in the felling machine is of crucial importance as one of the main parameters. Other important precipitation parameters are the concentration and the temperature of the precipitant solutions.

Im allgemeinen gilt: - hohe Temperatur (bis 80° C) und niedrige Konzentration (ca. 5%ige Lösungen) = grobe Teilchen; niedrige Temperatur (ca. 30°C) und hohe Konzentration (> 15%ige Lösungen) = feine Teilchen.In general: - high temperature (up to 80 ° C) and low concentration (approx. 5% solutions) = coarse particles; low temperature (approx. 30 ° C) and high concentration (> 15% solutions) = fine particles.

- Kleines Fällvolumen mit geringer Verweilzeit (< 1 sec) im Fällapparat = feine Teilchen; großes Fällvolumen mit großer Verweilzeit (bis zu einer Stunde) = grobe Teilchen.- Small precipitation volume with short residence time (<1 sec) in the precipitation apparatus = fine particles; large precipitation volume with a long residence time (up to one hour) = coarse particles.

Die Aufgabe bestand darin, das Fällverfahren und somit den zugehörigen Fällapparat durch Neukonstruktion zu vereinfachen, möglichst als geschlossener Apparat ohne Rührwerk und Ein-/Anbauteile, damit die geforderten Kornfeinheiten (Medianwert d50) im Bereich von 0,1 bis 2 μm reproduzierbar dauerhaft bei hoher BaS04-Durchsatzleistung (t/h) hergestellt werden können.The task was to simplify the felling process and thus the associated felling apparatus by redesigning, if possible as a closed apparatus without a stirrer and built-in parts, so that the required grain sizes (median value d 50 ) in the range from 0.1 to 2 μm are reproducibly permanent high BaS0 4 throughput (t / h) can be produced.

Es wurde herausgefunden, dass die vom Markt verlangten Produktfeinheiten - beurteilt nach dem Medianwert d5o - nur mit im Fällvolumen unterschiedlich großen Fällapparaten (Fällkapseln) in Kombination mit nachgeschalteten Statikmi- schern realisiert werden können.It was found that the product finenesses required by the market - assessed according to the median value d 5 o - can only be realized with precipitation units of different sizes in the precipitation volume (precipitation capsules) in combination with downstream static mixers.

Erfindungsgemäß wird bezüglich des Verfahrens daher vorgeschlagen, dass die Fällung kontinuierlich in parallel geschalteten Fällkapseln unterschiedlichen Fällvolumens erfolgt mit anschließender Homogenisierung im jeweiligen Statikmischer.According to the invention, it is therefore proposed with regard to the method that the precipitation takes place continuously in precipitation capsules of different precipitation volumes connected in parallel with subsequent homogenization in the respective static mixer.

Sinnvollerweise haben die Fällkapseln jeweils einen absperrbaren Zufluss für jede Einzelkomponente mit jeweils freiem Abfluss in den Statikmischer, der bzw. die in eine gemeinsame Ablaufleitung mündet/n.It is advisable that the capsules each have a lockable inflow for each individual component with free outflow into the static mixer, which opens into a common drain line.

Das Fällvolumen der verschiedenen Fällkapseln ist entscheident bei der Auswahl welcher Apparat für die geforderte Produktfeinheit zum Einsatz kommt. Eine erfindungsgemäße Fällkapsei zur Verwendung in dem eben beschriebenen Verfahren zeichnet sich dadurch aus, dass jede Fällkapsel einen Zufluss für eine Einzelkomponente in Axialrichtung der Fällkapsel und einen Zufluss für die andere Einzelkomponente tangential oder in einem spitzen Winkel zur Längsachse der Fällkapsel hat.The precipitation volume of the different capsules is decisive when choosing which device is used for the required product fineness. A capsule according to the invention for use in the method just described is characterized in that each capsule has an inflow for a single component in the axial direction of the capsule and an inflow for the other individual component tangentially or at an acute angle to the longitudinal axis of the capsule.

Bevorzugt sind die Fällkapseln aus Kunststoff hergestellt.The capsules are preferably made of plastic.

Bei den Fällkapseln (Fällvolumen < 1 bis 100 I) handelt es sich um geschlossene, runde zylinderförmige Fällapparate mit konischem Zu- und Ablauf. Ein weiterer Zulauf für die zweite Fällkomponente ist seitlich angeordnet.The falling capsules (falling volume <1 to 100 l) are closed, round, cylindrical falling pieces with a conical inlet and outlet. Another inlet for the second precipitation component is arranged on the side.

Diese Apparate sind bevorzugt aus Kunststoff hergestellt. Die Zuführung der beiden Fällkomponenten erfolgt jeweils separat über Leitungssysteme, die mit Pumpen verbunden sind. Die Volumenströme an barium- und sulfathaltiger Lösung gelangen zum Teil über Flüssigkeitsverteiler axial und tangential in die jeweilige Kapsel, wobei spontan Bariumsulfat ausgefällt wird, das unter geringem Druck als Fällsuspension in den Rohrmischer (Statikmischer) und von dort über eine gemeinsame Ablaufleitung zum sogenannten Fällbehälter (der in diesem Fall als Vorlagebehälter dient) gelangt.These devices are preferably made of plastic. The two precipitation components are fed separately via line systems that are connected to pumps. The volume flows of barium- and sulfate-containing solution partly reach the respective capsule axially and tangentially via liquid distributors, whereby barium sulfate is precipitated spontaneously, which, under low pressure, is precipitated into the tube mixer (static mixer) and from there via a common drain line to the so-called precipitation tank ( which in this case serves as a storage container).

Die Verweilzeit in dem jeweiligen Fällapparat ist abhängig von der Fällgröße (Fällvolumen) der Kapsel und der Fällgeschwindigkeit (Volumenstrom (m3/h)) der Fällmittellösungen.The dwell time in the respective precipitating device depends on the size of the precipitate (volume of precipitation) of the capsule and the rate of precipitation (volume flow (m 3 / h)) of the precipitant solutions.

Durch entsprechende Variation, d. h. Größe der Fällkapsel, kann bei sonst unveränderten Fällparametern (im wesentlichen Konzentration und Temperatur) jede gewünschte Kornfeinheit (Medianwert d5o im Bereich von 0,1 bis 2 μm) sicher eingestellt werden. Die unterschiedlich hohe Fällgeschwindigkeit in der jeweiligen Fällkapsel sorgt gleichzeitig für eine spontane intensive Vermischung der Fällkomponenten, so dass reaktionskinetisch gesehen keine lokalen Konzentrationsgefälle bei der Fällung entstehen, die das Kornspektrum/Medianwert d50 in unerwünschter Weise negativ beeinflussen.By appropriate variation, ie size of the capsule, any desired grain size (median value d 5 o in the range of 0.1 to 2 μm) can be reliably set with otherwise unchanged precipitation parameters (essentially concentration and temperature). The differently high rate of precipitation in the respective capsule at the same time ensures a spontaneous intensive mixing of the precipitation components, so that, from a reaction-kinetic point of view, there are no local concentration differences during precipitation which have an undesirable effect on the grain spectrum / median d 50 .

Das entscheidende Kriterium jedoch ist, dass die Reaktionskomponente erst kurz vor Eintritt in die jeweilige Fällkapsel - in der Zone höchster Turbulenz - miteinander in Kontakt kommen und die so hergestellte Fällsuspension im nachgeschalteten Rohrmischer weiter vereinheitlicht homogenisiert wird, so dass prak- tisch vor Einlauf in den eigentlichen Fällbehälter die Fällung abgeschlossen ist.The decisive criterion, however, is that the reaction component only comes into contact with each other shortly before entering the respective capsule - in the zone of highest turbulence - and the precipitate suspension thus produced is further homogenized in the downstream tube mixer, so that practically before it enters the actual precipitation container the precipitation is complete.

Erfahrungsgemäß ändert sich die Kornfeinheit im weiteren Prozessablauf nur unwesentlich. Die verwendeten erfindungsgemäßen Kapseln sind z. B. auch für die Herstellung von Bariumcarbonat, Bariumchromat und Zinksulfid geeignet.Experience has shown that the grain fineness changes only slightly in the further process. The capsules used according to the invention are e.g. B. also suitable for the production of barium carbonate, barium chromate and zinc sulfide.

Weitere Merkmale der Erfindung ergeben sich aus den Figuren 1 und 2, die nachfolgend beschrieben sind.Further features of the invention result from FIGS. 1 and 2, which are described below.

Fig. 1 zeigt mehrere Fällapparate (Fällkapseln) im Verbundsystem zur Fällung schwerlöslicher Stoffe, wie z. B. Bariumsulfat. Mit dem Bezugszeichen 1 sind Fällkapseln bezeichnet, die jeweils ein unterschiedliches Fällvolumen aufweisen, je nach der gewünschten Produktfeinheit. Jede Fällkapsel 1 weist einen mit ei- nem Ventil (mit 2 gekennzeichnet) absperrbaren Zufluss A für die erste Einzelkomponente und einen mit einem Ventil (mit 3 gekennzeichnet) absperrbaren Zufluss B für die zweite Einzelkomponente auf. Zu jeder Fällkapsel 1 gehört ein Statikmischer mit freiem Zu- und Abfluss 5, wobei die jeweiligen Abläufe über eine gemeinsame Leitung 6 in den sogenannten Fällbehälter 7 gelangen, der in diesem Fall der Vorlagebehälter für den weiteren Prozessschnitt ist. Durch entsprechende Variation des Fällvolumens der. einzelnen Fällkapseln 1 kann bei sonst unveränderten Fällparametern jede gewünschte Korn- bzw. Produktfeinheit im Bereich 0,1 - 2μm sicher eingestellt werden.Fig. 1 shows several precipitators (capsules) in the composite system for the precipitation of poorly soluble substances, such as. B. barium sulfate. The reference numeral 1 denotes precipitation capsules, each of which has a different precipitation volume, depending on the desired fineness of the product. Each capsule 1 has an inflow A for the first individual component that can be shut off with a valve (labeled 2) and an inflow B for the second individual component that can be shut off with a valve (labeled 3). Each precipitation capsule 1 has a static mixer with a free inflow and outflow 5, the respective processes passing through a common line 6 into the so-called precipitation container 7, which in this case is the storage container for the further process cut. By appropriate variation of the precipitation volume of. individual precipitation capsules 1, with otherwise unchanged precipitation parameters, any desired grain or product fineness can be reliably set in the range 0.1-2 μm.

Fig. 2 zeigte eine einzelne Fällkapsel 1 mit einem Zufluss A, einem Zufluss B und einem Abfluss 4. Der Zufluss A erfolgt axial in die Fällkapsel 1 und der Zufluss B erfolgt tangential bzw. mit einem spitzen Winkel. Die Fällkapseln 1 sind bevorzugt aus Kunststoff hergestellt. 2 shows a single precipitation capsule 1 with an inflow A, an inflow B and an outflow 4. The inflow A takes place axially into the precipitation capsule 1 and the inflow B takes place tangentially or at an acute angle. The precipitation capsules 1 are preferably made of plastic.

Claims

Patentansprüche claims 1. Verfahren zur Fällung schwerlöslicher Stoffe, wie z. B. Bariumsulfat, bei dem durch Zusammenführung zweier Einzelkomponenten in einer Fällkapsel durch Reaktion der Einzelkomponenten miteinander der gewünschte schwerlösliche Stoff entsteht, dadurch gekennzeichnet, dass die Fällung kontinuierlich in einer der parallel geschalteten Fällkapseln unterschiedlichen Fällvolumens erfolgt mit anschließender Homogenisierung in einem Statikmischer.1. Process for the precipitation of poorly soluble substances, such as. B. barium sulfate, in which the desired sparingly soluble substance is formed by combining two individual components in a precipitation capsule by reacting the individual components with one another, characterized in that the precipitation takes place continuously in one of the precipitation capsules of different precipitation volumes connected in parallel with subsequent homogenization in a static mixer. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Fällkapseln jeweils einen absperrbaren Zufluss zum Teil mit und ohne Flüssigkeitsvertei- ler für jede Einzelkomponente und jeweils einen freien Abfluss in den Statikmischer haben.2. The method according to claim 1, characterized in that the precipitation capsules each have a closable inflow, in part with and without a liquid distributor for each individual component, and each have a free outflow into the static mixer. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Fällapparat (Kapsel) mit dem entsprechenden Fällvolumen der einzelnen Fällkapseln nach der geforderten Produktfeinheit ausgewählt wird.3. The method according to claim 1 or 2, characterized in that the precipitation apparatus (capsule) with the corresponding precipitation volume of the individual precipitation capsules is selected according to the required fineness of the product. 4. Fällkapsel zur Verwendung in dem Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass jede Fällkapsel einen Zufluss für eine Einzelkomponente in Axialrichtung der Fällkapsel und einen Zufluss für die andere Einzelkomponente in einem spitzen Winkel zur Längsachse der Fällkapsel hat..4. capsule for use in the method according to any one of claims 1 to 3, characterized in that each capsule has an inflow for a single component in the axial direction of the capsule and an inflow for the other individual component at an acute angle to the longitudinal axis of the capsule. 5. Fällkapsel nach Anspruch 4, dadurch gekennzeichnet, dass diese aus me- dienresistentem Werkstoff, bevorzugt Kunststoff, hergestellt sind. 5. Capsule according to claim 4, characterized in that they are made of media-resistant material, preferably plastic.
PCT/EP2002/007713 2001-07-31 2002-07-11 Method for the precipitation of poorly-soluble materials such as barium sulphate for example and precipitation capsule Ceased WO2003011760A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/485,227 US20040202608A1 (en) 2001-07-31 2002-06-11 Method for the precipitation of poorly-soluble materials such as barium sulphate for example and precipitation capsule
EP02764666A EP1414749A1 (en) 2001-07-31 2002-07-11 Method for the precipitation of poorly-soluble materials such as barium sulphate for example and precipitation capsule
JP2003516958A JP2005505399A (en) 2001-07-31 2002-07-11 Sedimentation methods and sedimentation capsules for sparingly soluble substances such as barium sulfate

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10137325.2 2001-07-31
DE10137325 2001-07-31
DE10229189A DE10229189A1 (en) 2001-07-31 2002-06-28 Continuous precipitation of hardly soluble substance, e.g. barium sulfate, involves using parallel precipitation capsules of different volume with homogenization in static mixer
DE10229189.6 2002-06-28

Publications (1)

Publication Number Publication Date
WO2003011760A1 true WO2003011760A1 (en) 2003-02-13

Family

ID=26009828

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/007713 Ceased WO2003011760A1 (en) 2001-07-31 2002-07-11 Method for the precipitation of poorly-soluble materials such as barium sulphate for example and precipitation capsule

Country Status (3)

Country Link
EP (1) EP1414749A1 (en)
JP (1) JP2005505399A (en)
WO (1) WO2003011760A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010084007A1 (en) 2009-01-23 2010-07-29 Sachtleben Chemie Gmbh Polymer compositions comprising inorganic fillers and process for preparation thereof
CN103962038A (en) * 2014-04-01 2014-08-06 云南浩鑫铝箔有限公司 Device for preparing doubling oil or rolling oil for rolling of aluminum foil
WO2022237758A1 (en) * 2021-05-10 2022-11-17 清华大学 Continuous preparation method and system for nano-barium sulfate

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2125342A (en) * 1935-11-04 1938-08-02 Du Pont Process of making pigment barium sulphate from barium chloride
DE894840C (en) * 1943-09-20 1953-10-29 Jean Charles Seailles Method and device for the precipitation of a precipitate which is easy to separate from the mother liquor
US2685499A (en) * 1950-12-21 1954-08-03 Eastman Kodak Co Method of proeparing blanc fixe
EP0687651A1 (en) * 1994-06-13 1995-12-20 Sakai Chemical Industry Co., Ltd., Plate barium sulfate and process for producing the same
JP2917080B2 (en) * 1992-08-25 1999-07-12 花王株式会社 Method and apparatus for continuous production of poorly water-soluble salts
WO2000076919A1 (en) * 1999-06-09 2000-12-21 Sachtleben Chemie Gmbh Method for producing barium sulfate, barium sulfate and the utilization thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2125342A (en) * 1935-11-04 1938-08-02 Du Pont Process of making pigment barium sulphate from barium chloride
DE894840C (en) * 1943-09-20 1953-10-29 Jean Charles Seailles Method and device for the precipitation of a precipitate which is easy to separate from the mother liquor
US2685499A (en) * 1950-12-21 1954-08-03 Eastman Kodak Co Method of proeparing blanc fixe
JP2917080B2 (en) * 1992-08-25 1999-07-12 花王株式会社 Method and apparatus for continuous production of poorly water-soluble salts
EP0687651A1 (en) * 1994-06-13 1995-12-20 Sakai Chemical Industry Co., Ltd., Plate barium sulfate and process for producing the same
WO2000076919A1 (en) * 1999-06-09 2000-12-21 Sachtleben Chemie Gmbh Method for producing barium sulfate, barium sulfate and the utilization thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 199933, Derwent World Patents Index; Class J04, AN 1994-123453, XP002219187 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010084007A1 (en) 2009-01-23 2010-07-29 Sachtleben Chemie Gmbh Polymer compositions comprising inorganic fillers and process for preparation thereof
DE102009006014A1 (en) 2009-01-23 2010-08-05 Sachtleben Chemie Gmbh Polymer compositions with inorganic fillers and process for their preparation
CN103962038A (en) * 2014-04-01 2014-08-06 云南浩鑫铝箔有限公司 Device for preparing doubling oil or rolling oil for rolling of aluminum foil
WO2022237758A1 (en) * 2021-05-10 2022-11-17 清华大学 Continuous preparation method and system for nano-barium sulfate

Also Published As

Publication number Publication date
JP2005505399A (en) 2005-02-24
EP1414749A1 (en) 2004-05-06

Similar Documents

Publication Publication Date Title
DE102010043711B4 (en) Water treatment process
DE69823806T2 (en) METHOD AND DEVICE FOR PRODUCING PARTICLES
EP1286737B1 (en) Device for producing crystals
EP1622711A1 (en) Method and device for introducing liquids into a flow of solids of a spouted bed apparatus
EP1049531A1 (en) Device for the mixing and subsequent atomizing of liquids
DE3430600C2 (en)
DE102017110292A1 (en) Process and apparatus for producing reaction products
WO2003011760A1 (en) Method for the precipitation of poorly-soluble materials such as barium sulphate for example and precipitation capsule
EP3423179B1 (en) Device, system, and method for mixing at least one first material and a second material so as to form a base material for forming a mixture
DE69316089T2 (en) Procedure for the treatment of aspartame
DE102007045269A1 (en) Adsorptive cleaning of water in powdered activated carbon, comprises supplying the activated carbon and the water to be cleaned to a cleaning container, and separating the activated carbon from the water by a filter module
DE10229189A1 (en) Continuous precipitation of hardly soluble substance, e.g. barium sulfate, involves using parallel precipitation capsules of different volume with homogenization in static mixer
DE69509725T2 (en) Spray device for separating solids from fluids
DE2835113A1 (en) PROCESS FOR THE EXTRACTION OF ZINC, COPPER AND CADMIUM IN CONNECTION WITH THE LEAKING OF ZINCROES
AT521179A4 (en) Process for isolating lignin from an alkaline process stream
WO2016193087A1 (en) Method and technical process for the production of micro- and nanoparticles of different sizes
DE19915808A1 (en) Process, device and plant for the continuous treatment of water
DE1519885A1 (en) Process for the consolidation or agglomeration of finely divided materials
DE102007008878A1 (en) Preparation of inorganic nanoparticle, useful e.g. in lacquer, dye and adhesive, comprises precipitating a solution obtained from ultra-rapid mixing of several reactant
DE1274082B (en) Flow reactor for precipitation
DE814278C (en) Device for removing water from water and similar solutions
DE1076084B (en) Process for the treatment of liquids with ion exchangers
EP1761466A1 (en) Method and system for processing purified water
AT264805B (en) Method and device for mixing finely divided additives such as dyes or stabilizers with plastic melts
EP4288216A1 (en) Flotation installation, use and method

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB IE IT LU MC NL PT SE TR

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2003516958

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 2002764666

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2002764666

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 10485227

Country of ref document: US

WWW Wipo information: withdrawn in national office

Ref document number: 2002764666

Country of ref document: EP