EP1414749A1 - Procede de precipitation de substances difficilement solubles, telles que par ex. du sulfate de baryum, et capsules de precipitation - Google Patents

Procede de precipitation de substances difficilement solubles, telles que par ex. du sulfate de baryum, et capsules de precipitation

Info

Publication number
EP1414749A1
EP1414749A1 EP02764666A EP02764666A EP1414749A1 EP 1414749 A1 EP1414749 A1 EP 1414749A1 EP 02764666 A EP02764666 A EP 02764666A EP 02764666 A EP02764666 A EP 02764666A EP 1414749 A1 EP1414749 A1 EP 1414749A1
Authority
EP
European Patent Office
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.)
Withdrawn
Application number
EP02764666A
Other languages
German (de)
English (en)
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 claimed from DE10229189A external-priority patent/DE10229189A1/de
Application filed by Sachtleben Chemie GmbH filed Critical Sachtleben Chemie GmbH
Publication of EP1414749A1 publication Critical patent/EP1414749A1/fr
Withdrawn legal-status Critical Current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)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Procédé de précipitation de substances difficilement solubles, telles que par ex. du sulfate de baryum, et capsules de précipitation associées. Selon ledit procédé, deux constituants séparés sont réunis dans une capsule de précipitation et la substance désirée difficilement soluble est produite par réaction des constituants séparés entre eux. Selon la présente invention, pour obtenir des précipitations à finesse des grains définie de l'ordre de 0,1 à 2 νm et à haut débit, la précipitation se produit en continu dans une des capsules de précipitation raccordées en parallèle à volumes de précipitation (temps de séjour) différents, l'homogénéisation se produisant ensuite dans un mélangeur statique.
EP02764666A 2001-07-31 2002-07-11 Procede de precipitation de substances difficilement solubles, telles que par ex. du sulfate de baryum, et capsules de precipitation Withdrawn EP1414749A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10137325 2001-07-31
DE10137325 2001-07-31
DE10229189A DE10229189A1 (de) 2001-07-31 2002-06-28 Verfahren zur Fällung schwerlöslicher Stoffe, wie z.B. Bariumsulfat und Fällkapsel
DE10229189 2002-06-28
PCT/EP2002/007713 WO2003011760A1 (fr) 2001-07-31 2002-07-11 Procede de precipitation de substances difficilement solubles, telles que par ex. du sulfate de baryum, et capsules de precipitation

Publications (1)

Publication Number Publication Date
EP1414749A1 true EP1414749A1 (fr) 2004-05-06

Family

ID=26009828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02764666A Withdrawn EP1414749A1 (fr) 2001-07-31 2002-07-11 Procede de precipitation de substances difficilement solubles, telles que par ex. du sulfate de baryum, et capsules de precipitation

Country Status (3)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009006014A1 (de) 2009-01-23 2010-08-05 Sachtleben Chemie Gmbh Polymerzusammensetzungen mit anorganischen Füllstoffen und Verfahren zu deren Herstellung
CN103962038B (zh) * 2014-04-01 2016-08-24 云南浩鑫铝箔有限公司 铝箔轧制用双合油或轧制油的配制装置
CN113213520A (zh) * 2021-05-10 2021-08-06 清华大学 一种纳米硫酸钡连续制备方法及系统

Family Cites Families (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 (de) * 1943-09-20 1953-10-29 Jean Charles Seailles Verfahren und Vorrichtung zum Ausfaellen eines leicht von der Mutterlauge zu trennenden Niederschlages
US2685499A (en) * 1950-12-21 1954-08-03 Eastman Kodak Co Method of proeparing blanc fixe
JP2917080B2 (ja) * 1992-08-25 1999-07-12 花王株式会社 水難溶性塩の連続製造方法およびその装置
JP3067585B2 (ja) * 1994-06-13 2000-07-17 堺化学工業株式会社 板状硫酸バリウム及びその製法
DE19926216A1 (de) * 1999-06-09 2001-02-22 Metallgesellschaft Ag Verfahren zur Herstellung von Bariumsulfat, Bariumsulfat und Verwendung des Bariumsulfats

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03011760A1 *

Also Published As

Publication number Publication date
WO2003011760A1 (fr) 2003-02-13
JP2005505399A (ja) 2005-02-24

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