NO140226C - PROCEDURE FOR CONTINUOUS CRYSTALLIZATION - Google Patents

PROCEDURE FOR CONTINUOUS CRYSTALLIZATION

Info

Publication number
NO140226C
NO140226C NO761805A NO761805A NO140226C NO 140226 C NO140226 C NO 140226C NO 761805 A NO761805 A NO 761805A NO 761805 A NO761805 A NO 761805A NO 140226 C NO140226 C NO 140226C
Authority
NO
Norway
Prior art keywords
stage
suspension
crystals
series
stream
Prior art date
Application number
NO761805A
Other languages
Norwegian (no)
Other versions
NO140226B (en
NO761805L (en
Inventor
Tore B Mueller
Original Assignee
Inst Energiteknik
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 Inst Energiteknik filed Critical Inst Energiteknik
Priority to NO761805A priority Critical patent/NO140226C/en
Priority to HU77AO456A priority patent/HU181401B/en
Priority to CA291,483A priority patent/CA1096295A/en
Priority to SU772547906A priority patent/SU1126202A3/en
Priority to DE2752856A priority patent/DE2752856C2/en
Publication of NO761805L publication Critical patent/NO761805L/en
Publication of NO140226B publication Critical patent/NO140226B/en
Priority to US06/037,321 priority patent/US4332592A/en
Priority to US06/037,305 priority patent/US4336030A/en
Publication of NO140226C publication Critical patent/NO140226C/en

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
    • B01D9/0004—Crystallisation cooling by heat exchange
    • B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/004—Fractional crystallisation; Fractionating or rectifying columns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/262—Separation of sediment aided by centrifugal force or centripetal force by using a centrifuge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone

Landscapes

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

Abstract

A process for continuous crystallization from a solution of at least one crystallizable material in a series of crystallization stages with partial crystallization in each stage, and classifying of partially crystallized suspension between each stage, wherein suspension from the last stage is passed to a separator which separates and returns a stream of remaining crystals to the last stage, and remaining solution from the separator is discharged and product crystals are taken from the first stage, the improvement constituting the invention is that partially grown crystals are circulated in circuits constituted by two or more subsequent crystallization stages in the series and by their connection conduits thereby that a stream of partially crystallized suspension after separation of a coarse fraction by classification is passed from a stage to the next stage in the series, whereas a stream of return suspension is passed in countercurrent in the series from a stage to the preceding stage without classification and that the suspension of product crystals is taken from the first stage through an elutriation column (hydraulic classification tube) in counter-current with the incoming feed which takes crystals which are only partially grown back to the first stage.
NO761805A 1976-05-28 1976-05-28 PROCEDURE FOR CONTINUOUS CRYSTALLIZATION NO140226C (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NO761805A NO140226C (en) 1976-05-28 1976-05-28 PROCEDURE FOR CONTINUOUS CRYSTALLIZATION
HU77AO456A HU181401B (en) 1976-05-28 1977-11-18 Process and equipment for continuous crystallization
CA291,483A CA1096295A (en) 1976-05-28 1977-11-22 Process for continuous crystallization
SU772547906A SU1126202A3 (en) 1976-05-28 1977-11-25 Process for continuous repeated solution crystallization
DE2752856A DE2752856C2 (en) 1976-05-28 1977-11-26 Process for continuous crystallization from a solution
US06/037,321 US4332592A (en) 1976-05-28 1979-05-08 Process for continuous crystallization
US06/037,305 US4336030A (en) 1976-05-28 1979-05-08 Process for continuous crystallization

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO761805A NO140226C (en) 1976-05-28 1976-05-28 PROCEDURE FOR CONTINUOUS CRYSTALLIZATION

Publications (3)

Publication Number Publication Date
NO761805L NO761805L (en) 1977-11-29
NO140226B NO140226B (en) 1979-04-17
NO140226C true NO140226C (en) 1983-12-07

Family

ID=19882924

Family Applications (1)

Application Number Title Priority Date Filing Date
NO761805A NO140226C (en) 1976-05-28 1976-05-28 PROCEDURE FOR CONTINUOUS CRYSTALLIZATION

Country Status (4)

Country Link
CA (1) CA1096295A (en)
DE (1) DE2752856C2 (en)
HU (1) HU181401B (en)
NO (1) NO140226C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8200075A (en) * 1982-01-11 1983-08-01 Tno METHOD FOR CONTINUALLY PARTIAL CRYSTALIZATION AND SEPARATION OF A LIQUID MIXTURE AND AN APPARATUS FOR CARRYING OUT THIS PROCESS.
JPS5966305A (en) * 1982-10-05 1984-04-14 Tsukishima Kikai Co Ltd Counterflow type cooling and purifying method for molten substance
SE500965C2 (en) * 1993-03-31 1994-10-10 Flaekt Ab Methods and apparatus for extracting crystals from a solution
CN107098416A (en) * 2017-06-29 2017-08-29 合众高科（北京）环保技术股份有限公司 A kind of Waste Water Treatment and its method of wastewater treatment with buffer unit
CN111498929B (en) * 2020-04-20 2023-08-22 内蒙古久科康瑞环保科技有限公司 Fractional crystallization system and fractional crystallization method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1107200B (en) * 1959-06-12 1961-05-25 Wintershall Ag Process and device for the extraction of coarse-grained salts by vacuum cooling in several stages

Also Published As

Publication number Publication date
CA1096295A (en) 1981-02-24
NO140226B (en) 1979-04-17
HU181401B (en) 1983-07-28
DE2752856C2 (en) 1984-09-27
NO761805L (en) 1977-11-29
DE2752856A1 (en) 1979-05-31

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