GB747417A - Improvements in or relating to the production of phthalic acids - Google Patents

Improvements in or relating to the production of phthalic acids

Info

Publication number
GB747417A
GB747417A GB18227/53A GB1822753A GB747417A GB 747417 A GB747417 A GB 747417A GB 18227/53 A GB18227/53 A GB 18227/53A GB 1822753 A GB1822753 A GB 1822753A GB 747417 A GB747417 A GB 747417A
Authority
GB
United Kingdom
Prior art keywords
nitric acid
phthalic acids
relating
production
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
GB18227/53A
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.)
Richfield Oil Corp
Original Assignee
Richfield Oil Corp
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 Richfield Oil Corp filed Critical Richfield Oil Corp
Publication of GB747417A publication Critical patent/GB747417A/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 acids are prepared by a method comprising oxidizing the corresponding toluic acids in liquid phase with aqueous nitric acid at a temperature within the range 150-250 DEG C. while maintaining the concentration of the aqueous nitric acid at 1.15 to 15 per cent by weight based on the water present throughout the oxidation. Preferably a molar ratio of nitric acid to toluic acids in the range 2:1 to 8:1 is used and the nitric acid fed into the mixture has a concentration of 10 per cent by weight. In the examples the process is carried out both batchwise and continuously using varying reaction conditions.
GB18227/53A 1952-07-01 1953-07-01 Improvements in or relating to the production of phthalic acids Expired GB747417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US747417XA 1952-07-01 1952-07-01

Publications (1)

Publication Number Publication Date
GB747417A true GB747417A (en) 1956-04-04

Family

ID=22121412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18227/53A Expired GB747417A (en) 1952-07-01 1953-07-01 Improvements in or relating to the production of phthalic acids

Country Status (3)

Country Link
BE (1) BE521093A (en)
FR (1) FR1107461A (en)
GB (1) GB747417A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105091A (en) * 1957-09-23 1963-09-24 Farberke Hoechst Ag Vormals Me Process for the manufacture of carboxylic acids
US3165548A (en) * 1960-01-14 1965-01-12 Basf Ag Continuous process for the production of aromatic and heterocyclic carboxylic acids
US3173947A (en) * 1954-05-12 1965-03-16 Bergwerksverband Gmbh Method for oxidizing organic substances

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173947A (en) * 1954-05-12 1965-03-16 Bergwerksverband Gmbh Method for oxidizing organic substances
US3105091A (en) * 1957-09-23 1963-09-24 Farberke Hoechst Ag Vormals Me Process for the manufacture of carboxylic acids
US3165548A (en) * 1960-01-14 1965-01-12 Basf Ag Continuous process for the production of aromatic and heterocyclic carboxylic acids

Also Published As

Publication number Publication date
BE521093A (en)
FR1107461A (en) 1956-01-03

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