GB140051A - Improvements in the manufacture of phthalic anhydride - Google Patents

Improvements in the manufacture of phthalic anhydride

Info

Publication number
GB140051A
GB140051A GB27221/19A GB2722119A GB140051A GB 140051 A GB140051 A GB 140051A GB 27221/19 A GB27221/19 A GB 27221/19A GB 2722119 A GB2722119 A GB 2722119A GB 140051 A GB140051 A GB 140051A
Authority
GB
United Kingdom
Prior art keywords
phthalic anhydride
manufacture
acid
nitronaphthalene
distil
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
GB27221/19A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB140051A publication Critical patent/GB140051A/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
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/305—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with sulfur or sulfur-containing compounds

Landscapes

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

Abstract

Phthalic anhydride is produced by heating a -nitronaphthalene with sulphuric acid, not necessarily the concentrated or fuming acid, and iron or zinc. After the evolution of gas ceases, the temperature is raised to distil off the phthalic anhydride. Specification 18221/96 is referred to.
GB27221/19A 1919-03-07 1919-11-05 Improvements in the manufacture of phthalic anhydride Expired GB140051A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP140051X 1919-03-07

Publications (1)

Publication Number Publication Date
GB140051A true GB140051A (en) 1921-05-05

Family

ID=11849083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27221/19A Expired GB140051A (en) 1919-03-07 1919-11-05 Improvements in the manufacture of phthalic anhydride

Country Status (1)

Country Link
GB (1) GB140051A (en)

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