GB1331853A - Colour stabilization of refined dicarboxylic acids and refined dicarboxylic acid anhydrides - Google Patents

Colour stabilization of refined dicarboxylic acids and refined dicarboxylic acid anhydrides

Info

Publication number
GB1331853A
GB1331853A GB1725571A GB1725571A GB1331853A GB 1331853 A GB1331853 A GB 1331853A GB 1725571 A GB1725571 A GB 1725571A GB 1725571 A GB1725571 A GB 1725571A GB 1331853 A GB1331853 A GB 1331853A
Authority
GB
United Kingdom
Prior art keywords
colour
acid
chloride
refined
stabilization
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
GB1725571A
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.)
Monsanto Co
Original Assignee
Monsanto Co
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 Monsanto Co filed Critical Monsanto Co
Publication of GB1331853A publication Critical patent/GB1331853A/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
    • C07C51/54—Preparation of carboxylic acid anhydrides
    • C07C51/573—Separation; Purification; Stabilisation; Use of additives

Landscapes

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

Abstract

1331853 Colour stabilization of dicarboxylic acids and anhydrides MONSANTO CO 26 May 1971 [27 May 1970] 17255/71 Heading C2C A method for improving the colour stability of a refined dicarboxylic acid or acid anhydride comprises incorporating therein a colourstabilizing amount of a molecular halogen or a compound containing an ionic or labile halogen to give a novel composition therewith provided that when the anhydride is maleic anhydride the colour-stabilizing agent is not an alkali metal chloride or bromide, alkaline earth metal chloride or bromide, silver chloride, hydrobromic acid or hydrochloric acid. Suitable colour - stabilizing agents include inorganic halides and organic compounds such as fumaryl chloride, acrylyl chloride and meso-α,α<SP>1</SP>-dichlorosuccinic acid, and is preferably present in an amount of from 0À01 to 5 p.p.m. Examples describe the stabilization of maleic anhydride.
GB1725571A 1970-05-27 1971-05-26 Colour stabilization of refined dicarboxylic acids and refined dicarboxylic acid anhydrides Expired GB1331853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4111670A 1970-05-27 1970-05-27

Publications (1)

Publication Number Publication Date
GB1331853A true GB1331853A (en) 1973-09-26

Family

ID=21914837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1725571A Expired GB1331853A (en) 1970-05-27 1971-05-26 Colour stabilization of refined dicarboxylic acids and refined dicarboxylic acid anhydrides

Country Status (6)

Country Link
JP (1) JPS5314534B1 (en)
BE (1) BE767695A (en)
CA (1) CA926870A (en)
DE (1) DE2126246C2 (en)
FR (1) FR2093755A5 (en)
GB (1) GB1331853A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6593495B1 (en) * 1999-01-13 2003-07-15 Huntsman Petrochemical Corporation Anhydride stabilization
US6730810B2 (en) 1999-01-13 2004-05-04 Huntsman Petrochemical Corporation Anhydride stabilization

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296218A (en) * 1939-10-18 1942-09-15 Hercules Powder Co Ltd Purification of maleic anhydride
US3115477A (en) * 1962-03-29 1963-12-24 Petro Tex Chem Corp Stabilized cyclic anhydride compositions
US3115503A (en) * 1962-09-12 1963-12-24 Petro Tex Chem Corp Stabilized cyclic anhydrides
GB1283565A (en) * 1968-12-30 1972-07-26 Halcon International Inc Maleic anhydride composition of improved colour stability
US3622600A (en) * 1969-02-24 1971-11-23 Halcon International Inc Method for preparing color stable maleic anhydride
US3903117A (en) * 1970-05-27 1975-09-02 Monsanto Co Color stabilization of refined maleic acid anhydride

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6593495B1 (en) * 1999-01-13 2003-07-15 Huntsman Petrochemical Corporation Anhydride stabilization
US6603042B2 (en) 1999-01-13 2003-08-05 Huntsman Petrochemical Corporation Anhydride stabilization
US6730810B2 (en) 1999-01-13 2004-05-04 Huntsman Petrochemical Corporation Anhydride stabilization

Also Published As

Publication number Publication date
JPS5314534B1 (en) 1978-05-18
FR2093755A5 (en) 1972-01-28
DE2126246C2 (en) 1986-04-24
DE2126246A1 (en) 1971-12-09
BE767695A (en) 1971-11-26
CA926870A (en) 1973-05-22

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years