GB280373A - Improvements in the manufacture of aromatic acid anhydrides - Google Patents

Improvements in the manufacture of aromatic acid anhydrides

Info

Publication number
GB280373A
GB280373A GB3020226A GB3020226A GB280373A GB 280373 A GB280373 A GB 280373A GB 3020226 A GB3020226 A GB 3020226A GB 3020226 A GB3020226 A GB 3020226A GB 280373 A GB280373 A GB 280373A
Authority
GB
United Kingdom
Prior art keywords
benzotrichloride
water
chloride
benzoic
acid anhydrides
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
GB3020226A
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
British Dyestuffs Corp 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 British Dyestuffs Corp Ltd filed Critical British Dyestuffs Corp Ltd
Priority to GB3020226A priority Critical patent/GB280373A/en
Publication of GB280373A publication Critical patent/GB280373A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

280,373. British Dyestuffs Corporation, Ltd., Payman, J. B., and Hall, N. Nov. 29, 1926. Benzoic and other aromatic acid anhydrides are produced by treating bodies of the type of benzotrichloride with water or the corresponding acid in presence of a catalyst which is an inorganic or organic salt such as a chloride, sulphate, oxide benzoate, or sulphonate of a heavy or polyvalent metal such as zinc, copper, iron, aluminium or tin. In the examples, benzoic anhydride is obtained by treating benzotrichloride at 100-105‹ C. with water in presence of pumice containing zinc chloride; benzotrichloride is heated at 110- 115‹ C. with dry ferrous sulphate or ferric chloride and benzoic acid; and benzotrichloride is heated as in the first example with ferrous sulphate crystals instead of the water and zinc chloride catalyst, the water being obtained from the crystals. Specification 2878/80 is referred to.
GB3020226A 1926-11-29 1926-11-29 Improvements in the manufacture of aromatic acid anhydrides Expired GB280373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3020226A GB280373A (en) 1926-11-29 1926-11-29 Improvements in the manufacture of aromatic acid anhydrides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3020226A GB280373A (en) 1926-11-29 1926-11-29 Improvements in the manufacture of aromatic acid anhydrides

Publications (1)

Publication Number Publication Date
GB280373A true GB280373A (en) 1927-11-17

Family

ID=10303895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3020226A Expired GB280373A (en) 1926-11-29 1926-11-29 Improvements in the manufacture of aromatic acid anhydrides

Country Status (1)

Country Link
GB (1) GB280373A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4562010A (en) * 1978-08-28 1985-12-31 Bayer Aktiengesellschaft Process for the preparation of benzoic anhydride

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4562010A (en) * 1978-08-28 1985-12-31 Bayer Aktiengesellschaft Process for the preparation of benzoic anhydride

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