BR9713571A - Process for suspension crystallization. - Google Patents

Process for suspension crystallization.

Info

Publication number
BR9713571A
BR9713571A BR9713571-2A BR9713571A BR9713571A BR 9713571 A BR9713571 A BR 9713571A BR 9713571 A BR9713571 A BR 9713571A BR 9713571 A BR9713571 A BR 9713571A
Authority
BR
Brazil
Prior art keywords
suspension
crystallization
separated
mother liquor
crystal phase
Prior art date
Application number
BR9713571-2A
Other languages
Portuguese (pt)
Inventor
Ruediger Dr Drope
Dieter Dr Grenner
Hartmut Dr Hetzel
Hans-Peter Dr Schal
Gerhard Dr Wegener
Original Assignee
Bayer Ag
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 Bayer Ag filed Critical Bayer Ag
Publication of BR9713571A publication Critical patent/BR9713571A/en

Links

Classifications

    • 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
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/18—Separation; Purification; Stabilisation; Use of additives
    • C07C263/20—Separation; Purification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00—Systems containing only non-condensed rings
    • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/14—The ring being saturated

Landscapes

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

Abstract

Patente de Invenção: <B>"PROCESSO PARA A CRISTALIZAçãO POR SUSPENSãO"<D>. é descrito um processo para a separação de um composto orgânico cristalizável de uma mistura de compostos líquida mediante cristalização por suspensão em uma ou em várias etapas, sendo que os cristais são separados atrás da última etapa por uma coluna de lavagem, e da primeira etapa é expulsa uma lixívia-mãe empobrecida em composto a ser separado por cristalização, que é caracterizado pelo fato de que a fase de cristal é separada da suspensão antes da entrada da suspensão na coluna de lavagem e é ressuspensa em uma lixívia-mãe, cuja temperatura de líquido não se encontra em mais de 8,5°C abaixo de temperatura de fusão da fase de cristal.Invention Patent: <B> "PROCESS FOR SUSPENSION CRYSTALLIZATION" <D>. a process for separating a crystallizable organic compound from a liquid compound mixture is described by crystallization by suspension in one or several stages, the crystals being separated behind the last stage by a washing column, and the first stage is expels a mother liquor depleted in compost to be separated by crystallization, which is characterized by the fact that the crystal phase is separated from the suspension before the suspension enters the washing column and is resuspended in a mother liquor, whose temperature of liquid is not more than 8.5 ° C below the melting temperature of the crystal phase.

BR9713571-2A 1996-12-10 1997-11-27 Process for suspension crystallization. BR9713571A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19651216A DE19651216C1 (en) 1996-12-10 1996-12-10 Suspension crystallization process
PCT/EP1997/006610 WO1998025889A1 (en) 1996-12-10 1997-11-27 Suspension crystallization method

Publications (1)

Publication Number Publication Date
BR9713571A true BR9713571A (en) 2000-03-14

Family

ID=7814191

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9713571-2A BR9713571A (en) 1996-12-10 1997-11-27 Process for suspension crystallization.

Country Status (7)

Country Link
EP (1) EP0944588A1 (en)
JP (1) JP2001505485A (en)
AU (1) AU5655698A (en)
BR (1) BR9713571A (en)
DE (1) DE19651216C1 (en)
TW (1) TW380128B (en)
WO (1) WO1998025889A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4960562B2 (en) * 2000-04-11 2012-06-27 ビーエーエスエフ ソシエタス・ヨーロピア Purification of crude acrylic acid melt
DE10221176A1 (en) 2002-05-13 2003-11-27 Basf Ag Process for the preparation of low-odor hydrogel-forming polymers
WO2010095927A1 (en) * 2009-02-23 2010-08-26 Gea Niro Pt B.V. Process for crystallizing and separating different diisocyanate isomers
EP2471739A1 (en) 2011-01-04 2012-07-04 Solvay Sa Process for the purification of phosphoric acid
EP2471585A1 (en) 2011-01-04 2012-07-04 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Apparatus and method for separating solid particles from a slurry
CN103012030B (en) * 2012-12-31 2015-04-15 浙江工业大学 Method for purifying organic mixture by static melt crystallization
WO2021032519A1 (en) 2019-08-21 2021-02-25 Basf Se Method for purification of isosorbide

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217024A (en) * 1963-03-22 1965-11-09 Allied Chem Conversion of mixtures of 2, 4-and 2, 6-toluene diisocyanates to other mixtures of different isomer ratio
US3777892A (en) * 1971-01-27 1973-12-11 H Thijssen Apparatus for the separation and treatment of solid particles from a liquid suspension
US3872009A (en) * 1971-06-25 1975-03-18 Henricus Alexis Corne Thijssen Apparatus for the separation and treatment of solid particles from a liquid suspension
DE3220439A1 (en) * 1982-05-29 1983-12-01 Bayer Ag, 5090 Leverkusen METHOD FOR SEPARATING TECHNOLOGALLY PURE 2,4-DIISOCYANATOTOLUOL OR OF AN INCREASED LEVEL OF 2,4-DIISOCYANATOTOLUOL ISOMERIC MIXTURES FROM, ESSENTIALLY consisting of 2,4- and 2,6-DIISOCYANATOTOLUENE ISING
US4557741A (en) * 1984-02-13 1985-12-10 Grasso's Koniklyke Machine Fabriekon N.V. Gradient column freeze concentration system
NL8603314A (en) * 1986-12-29 1988-07-18 Grasso Koninkl Maschf METHOD AND APPARATUS FOR RECOVERING A PURE SUBSTANCE FROM A LIQUID MIXTURE BY CRYSTALLIZATION
US4787985A (en) * 1987-08-25 1988-11-29 Grenco Process Technology B.V. Multi-stage purification unit process
DE4425316A1 (en) * 1994-07-18 1996-01-25 Bayer Ag Method for cleaning water by freeze crystallisation

Also Published As

Publication number Publication date
EP0944588A1 (en) 1999-09-29
TW380128B (en) 2000-01-21
DE19651216C1 (en) 1998-08-20
AU5655698A (en) 1998-07-03
MX9905358A (en) 1999-12-01
WO1998025889A1 (en) 1998-06-18
JP2001505485A (en) 2001-04-24

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired