ES421033A1 - Process for preparing aromatic carboxylic acids - Google Patents

Process for preparing aromatic carboxylic acids

Info

Publication number
ES421033A1
ES421033A1 ES421033A ES421033A ES421033A1 ES 421033 A1 ES421033 A1 ES 421033A1 ES 421033 A ES421033 A ES 421033A ES 421033 A ES421033 A ES 421033A ES 421033 A1 ES421033 A1 ES 421033A1
Authority
ES
Spain
Prior art keywords
hydrolysis
nitriles
aromatic carboxylic
aromatic
nitrile
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
ES421033A
Other languages
Spanish (es)
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.)
Sun Research and Development Co
Original Assignee
Sun Research and Development 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
Priority claimed from US361385A external-priority patent/US3873610A/en
Application filed by Sun Research and Development Co filed Critical Sun Research and Development Co
Publication of ES421033A1 publication Critical patent/ES421033A1/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/08Preparation of carboxylic acids or their salts, halides or anhydrides from nitriles

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

Method of preparing aromatic carboxylic acids, from aromatic nitriles, characterized in that it comprises non-catalytic hydrolysis until equilibrium of an aqueous solution of said nitriles at 200º-300ºC in the presence of recycled soluble hydrolysis products of said nitriles, separated from the mixture with precipitated aromatic acids obtained in the process, containing the hydrolysis medium approximately 0.45-2.0 equivalents of recycle carboxylic acid hydrolysis per mole of nitrile, and evacuate steam and ammonia at approximately 200º-300ºC and at autogenous pressure, the amount of ammonia evacuated being more than 50% of that formed from said nitrile, refrigerate to precipitate free aromatic carboxylic acid, separate said solid acid from the solution of soluble products and recycle said aqueous solution towards subsequent hydrolysis . (Machine-translation by Google Translate, not legally binding)
ES421033A 1973-05-17 1973-11-30 Process for preparing aromatic carboxylic acids Expired ES421033A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US361385A US3873610A (en) 1972-02-03 1973-05-17 Process for aromatic carboxylic acids

Publications (1)

Publication Number Publication Date
ES421033A1 true ES421033A1 (en) 1976-04-01

Family

ID=23421816

Family Applications (1)

Application Number Title Priority Date Filing Date
ES421033A Expired ES421033A1 (en) 1973-05-17 1973-11-30 Process for preparing aromatic carboxylic acids

Country Status (7)

Country Link
BE (1) BE815120R (en)
DE (1) DE2358497A1 (en)
ES (1) ES421033A1 (en)
FR (1) FR2229674B2 (en)
GB (1) GB1411300A (en)
IN (1) IN141010B (en)
IT (1) IT1044790B (en)

Also Published As

Publication number Publication date
BE815120R (en) 1974-11-18
GB1411300A (en) 1975-10-22
DE2358497A1 (en) 1974-12-05
FR2229674B2 (en) 1979-07-13
IT1044790B (en) 1980-04-21
IN141010B (en) 1977-01-08
FR2229674A2 (en) 1974-12-13

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