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GB1083850A - Purification process - Google Patents

Purification process

Info

Publication number
GB1083850A
GB1083850A GB47678/63A GB4767863A GB1083850A GB 1083850 A GB1083850 A GB 1083850A GB 47678/63 A GB47678/63 A GB 47678/63A GB 4767863 A GB4767863 A GB 4767863A GB 1083850 A GB1083850 A GB 1083850A
Authority
GB
United Kingdom
Prior art keywords
liquid
coolant
cooled surface
vessel
crystalline layer
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.)
Expired
Application number
GB47678/63A
Inventor
Edmund Barton
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB47678/63A priority Critical patent/GB1083850A/en
Priority to NL6413888A priority patent/NL6413888A/xx
Priority to CH1552764A priority patent/CH425724A/en
Priority to FR997323A priority patent/FR1416274A/en
Priority to BE656602A priority patent/BE656602A/xx
Publication of GB1083850A publication Critical patent/GB1083850A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C255/00—Carboxylic acid nitriles
    • 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
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
    • C07C37/84—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by crystallisation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/14—Purification; Separation; Use of additives by crystallisation; Purification or separation of the crystals
    • 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)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,083,850. Crystallizing. IMPERIAL CHEMICAL INDUSTRIES Ltd. Nov. 17, 1964 [Dec. 3, 1963], No. 47678/63. Heading B1G. In the building up of a crystalline layer on a cooled surface from a circulating liquid in the form of a solution or melt, control is effected by adding heat to the liquid before reaching the cooled surface in a progressively decreasing amount by means of a heat exchanger and/or by removing heat from the cooled surface in a progressively increasing amount by means of a coolant of decreasing temperature and/or increasing rate of flow. The turbulence of the circulating liquid may be adjusted during the crystallization process. Crystallization may be effected in a plurality of tubes in series or in a bundle of tubes. The cooled surface may be finned. The coolant may be a fluid flowing parallel to the crystallizing liquid or may be a cross flow of air. The crystalline layer may be melted by replacing the coolant by a heating fluid or by direct contact with heated melt of the same composition. A thin crystalline layer may be left to seed further crystal formation. The method may be used to purify naphthalene, parazylene, adiponitrile, or methylcyclohexyl-4-methylphenol. As shown, liquid passes from a feed vessel B through a heat exchanger Q and a pump A to a crystallizer tube C having a jacket D whence it is recycled to vessel B. After completion of a crystallization cycle, coolant is replaced by heating fluid in jacket D and the melt obtained as product in vessel M. Further feed may be mixed with the residual liquid. The residual liquid is eventually passed to receiver O.
GB47678/63A 1963-12-03 1963-12-03 Purification process Expired GB1083850A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB47678/63A GB1083850A (en) 1963-12-03 1963-12-03 Purification process
NL6413888A NL6413888A (en) 1963-12-03 1964-11-30
CH1552764A CH425724A (en) 1963-12-03 1964-12-02 Process for the purification of crystallizable materials
FR997323A FR1416274A (en) 1963-12-03 1964-12-03 Process for the purification of crystallizable materials
BE656602A BE656602A (en) 1963-12-03 1964-12-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47678/63A GB1083850A (en) 1963-12-03 1963-12-03 Purification process

Publications (1)

Publication Number Publication Date
GB1083850A true GB1083850A (en) 1967-09-20

Family

ID=10445886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47678/63A Expired GB1083850A (en) 1963-12-03 1963-12-03 Purification process

Country Status (4)

Country Link
BE (1) BE656602A (en)
CH (1) CH425724A (en)
GB (1) GB1083850A (en)
NL (1) NL6413888A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2606364A1 (en) * 1976-02-18 1977-09-01 Basf Ag PROCESS FOR THE SEPARATION OF SUBSTANCES FROM A LIQUID MIXTURE BY FRACTIONAL CRYSTALLIZATION
US4795571A (en) * 1987-02-20 1989-01-03 Basf Aktiengesellschaft Purification of frozen crystal layers
EP0856344A1 (en) * 1997-01-31 1998-08-05 Basf Aktiengesellschaft Process for purifying imidazoles and imidazol-based agents by crystallisation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2606364A1 (en) * 1976-02-18 1977-09-01 Basf Ag PROCESS FOR THE SEPARATION OF SUBSTANCES FROM A LIQUID MIXTURE BY FRACTIONAL CRYSTALLIZATION
FR2341343A1 (en) * 1976-02-18 1977-09-16 Basf Ag PROCESS FOR SEPARATING SUBSTANCES FROM A LIQUID MIXTURE BY FRACTIONAL CRYSTALLIZATION
US4493719A (en) * 1976-02-18 1985-01-15 Basf Aktiengesellschaft Method of separation by fractional crystallization from a liquid mixture
US4795571A (en) * 1987-02-20 1989-01-03 Basf Aktiengesellschaft Purification of frozen crystal layers
EP0856344A1 (en) * 1997-01-31 1998-08-05 Basf Aktiengesellschaft Process for purifying imidazoles and imidazol-based agents by crystallisation

Also Published As

Publication number Publication date
NL6413888A (en) 1965-06-04
BE656602A (en) 1965-06-03
CH425724A (en) 1966-12-15

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