FR2409780A1 - Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77) - Google Patents

Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

Info

Publication number
FR2409780A1
FR2409780A1 FR7735514A FR7735514A FR2409780A1 FR 2409780 A1 FR2409780 A1 FR 2409780A1 FR 7735514 A FR7735514 A FR 7735514A FR 7735514 A FR7735514 A FR 7735514A FR 2409780 A1 FR2409780 A1 FR 2409780A1
Authority
FR
France
Prior art keywords
series
stage
crystalliser
counterflow
units
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.)
Granted
Application number
FR7735514A
Other languages
French (fr)
Other versions
FR2409780B1 (en
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.)
Institutt for Atomenergi
Original Assignee
Institutt for Atomenergi
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 Institutt for Atomenergi filed Critical Institutt for Atomenergi
Priority to FR7735514A priority Critical patent/FR2409780A1/en
Publication of FR2409780A1 publication Critical patent/FR2409780A1/en
Application granted granted Critical
Publication of FR2409780B1 publication Critical patent/FR2409780B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Crystallisation process contains a series of stages in each of which partial crystallisation occurs. The mixture enters a separation stage, as it leaves the final stage. There is a separation between fine crystals and the coarser ones required as product by maintaining an upwards velocity of feed liquor in the crystal outlet passage. The coarse crystals from each stage are fed back to the previous stage on that there is a gradual growth of crystals from one end of the process to the other. The crystal product is taken off in equilibrium with the saturated feed liquor while the spent liquor leaves from the other end of the process. Used for industrial crystallisations esp. of Al(OH)3. The process is simple and economic, it gives a uniform product of reasonable size and is not sensitive to other process variations.
FR7735514A 1977-11-25 1977-11-25 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77) Granted FR2409780A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7735514A FR2409780A1 (en) 1977-11-25 1977-11-25 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7735514A FR2409780A1 (en) 1977-11-25 1977-11-25 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

Publications (2)

Publication Number Publication Date
FR2409780A1 true FR2409780A1 (en) 1979-06-22
FR2409780B1 FR2409780B1 (en) 1982-10-29

Family

ID=9198065

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7735514A Granted FR2409780A1 (en) 1977-11-25 1977-11-25 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

Country Status (1)

Country Link
FR (1) FR2409780A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157561A2 (en) * 1984-03-30 1985-10-09 Kawasaki Steel Corporation Metal stripping system and an operation process therefor
FR2881360A1 (en) * 2005-02-02 2006-08-04 Crystal Evap Consult Sarl Solution crystallization comprises use of reactor with series of compartments for recycling solution and recuperation of mother liquor
CN106132496A (en) * 2014-03-19 2016-11-16 巴斯夫欧洲公司 For the method and apparatus that material is separated from solution

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157561A2 (en) * 1984-03-30 1985-10-09 Kawasaki Steel Corporation Metal stripping system and an operation process therefor
EP0157561A3 (en) * 1984-03-30 1986-10-01 Kawasaki Steel Corporation Metal stripping system and an operation process therefor
US4830836A (en) * 1984-03-30 1989-05-16 Kawasaki Steel Corporation Metal stripping system and an operation process therefor
FR2881360A1 (en) * 2005-02-02 2006-08-04 Crystal Evap Consult Sarl Solution crystallization comprises use of reactor with series of compartments for recycling solution and recuperation of mother liquor
WO2006082341A1 (en) * 2005-02-02 2006-08-10 Crystal-Evap Consult Crystallization method and device
CN106132496A (en) * 2014-03-19 2016-11-16 巴斯夫欧洲公司 For the method and apparatus that material is separated from solution
CN106132496B (en) * 2014-03-19 2020-03-13 巴斯夫欧洲公司 Method and device for separating substances from a solution

Also Published As

Publication number Publication date
FR2409780B1 (en) 1982-10-29

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