GB720385A - Preparation of phthalic acids - Google Patents

Preparation of phthalic acids

Info

Publication number
GB720385A
GB720385A GB13537/52A GB1353752A GB720385A GB 720385 A GB720385 A GB 720385A GB 13537/52 A GB13537/52 A GB 13537/52A GB 1353752 A GB1353752 A GB 1353752A GB 720385 A GB720385 A GB 720385A
Authority
GB
United Kingdom
Prior art keywords
acid
mixtures
acids
phthalic
phthalic acids
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
GB13537/52A
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
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
Monsanto Chemical 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 Chemicals Ltd, Monsanto Chemical Co filed Critical Monsanto Chemicals Ltd
Publication of GB720385A publication Critical patent/GB720385A/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
    • C07C51/27—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with oxides of nitrogen or nitrogen-containing mineral acids
    • C07C51/275—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with oxides of nitrogen or nitrogen-containing mineral acids of hydrocarbyl groups

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

Phthalic acid is prepared by a method comprising slowly adding nitric acid of at least 30 per cent concentration to a toluic acid in the fluid state while removing water by distillation. Preferably the addition takes place at a temperature above 140 DEG C. in an inert organic medium which is liquid at the reaction temperature. Benzoic acid, mineral oil, chlorinated diphenyls, diphenyl, and diphenyl ethers are examples of suitable inert media. Mixtures of phthalic acids are obtained by using mixtures of the corresponding toluic acids as starting materials. Specification 720,384 is referred to.
GB13537/52A 1951-05-28 1952-05-28 Preparation of phthalic acids Expired GB720385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US720385XA 1951-05-28 1951-05-28

Publications (1)

Publication Number Publication Date
GB720385A true GB720385A (en) 1954-12-15

Family

ID=22105176

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13537/52A Expired GB720385A (en) 1951-05-28 1952-05-28 Preparation of phthalic acids

Country Status (1)

Country Link
GB (1) GB720385A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1124936B (en) * 1957-07-10 1962-03-08 Fisons Pest Control Ltd Process for the production of polychlorobenzoic acids
DE1195737B (en) * 1956-11-05 1965-07-01 Snia Viscosa Process for the production of benzene carbonic acids

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1195737B (en) * 1956-11-05 1965-07-01 Snia Viscosa Process for the production of benzene carbonic acids
DE1124936B (en) * 1957-07-10 1962-03-08 Fisons Pest Control Ltd Process for the production of polychlorobenzoic acids

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