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GB370438A - Improvements in or relating to the manufacture of acetic anhydride - Google Patents

Improvements in or relating to the manufacture of acetic anhydride

Info

Publication number
GB370438A
GB370438A GB51231A GB51231A GB370438A GB 370438 A GB370438 A GB 370438A GB 51231 A GB51231 A GB 51231A GB 51231 A GB51231 A GB 51231A GB 370438 A GB370438 A GB 370438A
Authority
GB
United Kingdom
Prior art keywords
catalysts
phosphates
phosphate
metaphosphate
metal phosphates
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
GB51231A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB51231A priority Critical patent/GB370438A/en
Publication of GB370438A publication Critical patent/GB370438A/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
    • C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Catalysts (AREA)

Abstract

The production of acetic anhydride from acetic acid vapour by passing it over electrically heated phosphatic catalysts as described in the parent Specification, is varied by using phosphatic catalysts which are wholly or in part metal phosphates other than alkali metal phosphates. These phosphates may be used in admixture with one another or in small or large proportions, with alkali metal phosphates or pseudo-phosphates such as boron phosphate. These catalysts have higher electric resistance. The following specific catalysts are mentioned: sodium lithium metaphosphate with 30 per cent boron phosphate and 5 per cent ferric phosphate; lead metaphosphate; zinc phosphate; and 1 part of boron phosphate with 4 parts of lead metaphosphate. The specific resistance of these catalysts varies from 5,8 to 33 as compared with 2,1 to 4,6 for the catalysts mentioned in the parent Specification.
GB51231A 1931-01-06 1931-01-06 Improvements in or relating to the manufacture of acetic anhydride Expired GB370438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB51231A GB370438A (en) 1931-01-06 1931-01-06 Improvements in or relating to the manufacture of acetic anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB51231A GB370438A (en) 1931-01-06 1931-01-06 Improvements in or relating to the manufacture of acetic anhydride

Publications (1)

Publication Number Publication Date
GB370438A true GB370438A (en) 1932-04-06

Family

ID=9705652

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51231A Expired GB370438A (en) 1931-01-06 1931-01-06 Improvements in or relating to the manufacture of acetic anhydride

Country Status (1)

Country Link
GB (1) GB370438A (en)

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