GB1155542A - Anhydrides - Google Patents

Anhydrides

Info

Publication number
GB1155542A
GB1155542A GB1246667A GB1246667A GB1155542A GB 1155542 A GB1155542 A GB 1155542A GB 1246667 A GB1246667 A GB 1246667A GB 1246667 A GB1246667 A GB 1246667A GB 1155542 A GB1155542 A GB 1155542A
Authority
GB
United Kingdom
Prior art keywords
benzene
phthalic anhydride
halide
anhydrides
loss
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
GB1246667A
Inventor
William Cummings
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 Chemicals Ltd
Original Assignee
Monsanto Chemicals 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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB1246667A priority Critical patent/GB1155542A/en
Priority to US709805A priority patent/US3576013A/en
Priority to FR1556159D priority patent/FR1556159A/fr
Publication of GB1155542A publication Critical patent/GB1155542A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/33—Polycyclic acids
    • C07C63/331—Polycyclic acids with all carboxyl groups bound to non-condensed rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,155,542. Anhydrides. MONSANTO CHEMICALS Ltd. 20 Feb., 1968 [16 March, 1967], No. 12466/67. Heading C2C. Novel mixtures of aromatic polyanhydrides wherein the individual anhydrides can be represented by the formula PaBb, where P represents a radical derived by the loss of one or more hydrogen atoms from the nucleus of the phthalic anhydride molecule. B represents a radical derived by the loss of two or more hydrogen atoms from the benzene molecule and a and b are integers, are prepared by a process comprising the gradual addition of a benzene disulphonyl halide, preferably benzene metadisulphonyl chloride, to phthalic anhydride, using at least 1À5 and preferably 2 to 20 moles of anhydride per mole of benzene disulphonyl halide, under conditions such that SO 2 and a hydrogen halide are evolved and at temperatures preferably in the range 200-350‹ C., but possibly as high as 400‹ C., and removing any unchanged phthalic anhydride from the reaction mixture. The process may be performed in the presence of a catalytic amount of copper or a compound containing copper. The overall ratio of P: B units is generally 1: 2 to 2: 1 or preferably 1:1 to 2:1. In the simplest instance the composition of the invention is a mixture of isomeric terphenyl tetracarboxylic dianhydrides of the formula These mixtures are valuable as starting materials in the production of condensation polymers.
GB1246667A 1962-12-28 1967-03-16 Anhydrides Expired GB1155542A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1246667A GB1155542A (en) 1967-03-16 1967-03-16 Anhydrides
US709805A US3576013A (en) 1962-12-28 1968-03-01 Polyanhydrides
FR1556159D FR1556159A (en) 1967-03-16 1968-03-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1246667A GB1155542A (en) 1967-03-16 1967-03-16 Anhydrides

Publications (1)

Publication Number Publication Date
GB1155542A true GB1155542A (en) 1969-06-18

Family

ID=10005128

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1246667A Expired GB1155542A (en) 1962-12-28 1967-03-16 Anhydrides

Country Status (2)

Country Link
FR (1) FR1556159A (en)
GB (1) GB1155542A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510660B2 (en) * 1971-12-29 1980-03-18

Also Published As

Publication number Publication date
FR1556159A (en) 1969-01-31

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