GB1366933A - Separation of dicarboxylic acids - Google Patents

Separation of dicarboxylic acids

Info

Publication number
GB1366933A
GB1366933A GB1900771A GB1900771A GB1366933A GB 1366933 A GB1366933 A GB 1366933A GB 1900771 A GB1900771 A GB 1900771A GB 1900771 A GB1900771 A GB 1900771A GB 1366933 A GB1366933 A GB 1366933A
Authority
GB
United Kingdom
Prior art keywords
acid
succinic
glutaric
separation
succinic acid
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
GB1900771A
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 GB1900771A priority Critical patent/GB1366933A/en
Publication of GB1366933A publication Critical patent/GB1366933A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1366933 Succinic acid IMPERIAL CHEMICAL INDUSTRIES Ltd 16 May 1972 [4 June 1971] 19007/71 Heading C2C Succinic acid is separated from a mixture with adipic acid, and glutaric acid, e.g. nylon waste acid, by dissolving the mixture in nitric acid (65 to 75% by weight), cooling the solution to cause crystallization of the succinic acid. The acid mixtures comprises 10 to 20% adipic acid, 45 to 60% glutaric acid and 20 to 40% succinic acid. After cooling to 35‹ to 45‹ C. to crystallize and isolate the succinic acid the mother liquor is further cooled to give adipic acid crystals mixed with glutaric and succinic, and after separation evaporated to dryness to give solid glutaric acids.
GB1900771A 1972-05-16 1972-05-16 Separation of dicarboxylic acids Expired GB1366933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1900771A GB1366933A (en) 1972-05-16 1972-05-16 Separation of dicarboxylic acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1900771A GB1366933A (en) 1972-05-16 1972-05-16 Separation of dicarboxylic acids

Publications (1)

Publication Number Publication Date
GB1366933A true GB1366933A (en) 1974-09-18

Family

ID=10122197

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1900771A Expired GB1366933A (en) 1972-05-16 1972-05-16 Separation of dicarboxylic acids

Country Status (1)

Country Link
GB (1) GB1366933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2371802A1 (en) * 2010-03-30 2011-10-05 DSM IP Assets B.V. Process for the crystallization of succinic acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2371802A1 (en) * 2010-03-30 2011-10-05 DSM IP Assets B.V. Process for the crystallization of succinic acid

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee