GB1377333A - Process for aromatic carboxylic acids - Google Patents

Process for aromatic carboxylic acids

Info

Publication number
GB1377333A
GB1377333A GB524573A GB524573A GB1377333A GB 1377333 A GB1377333 A GB 1377333A GB 524573 A GB524573 A GB 524573A GB 524573 A GB524573 A GB 524573A GB 1377333 A GB1377333 A GB 1377333A
Authority
GB
United Kingdom
Prior art keywords
hydrolysis
nitriles
aromatic carboxylic
nitrile
carboxylic 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
GB524573A
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
Application filed by Sun Research and Development Co filed Critical Sun Research and Development Co
Publication of GB1377333A publication Critical patent/GB1377333A/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
    • C07C51/08—Preparation of carboxylic acids or their salts, halides or anhydrides from nitriles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

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

1377333 Aromatic carboxylic acids SUN RESEARCH & DEVELOPMENT CO 2 Feb 1973 [3 Feb 1972] 5245/73 Heading C2C Aromatic carboxylic acids are made from aromatic nitriles by a process which comprises the non-catalytic hydrolysers of an aqueous solution of said nitriles at 200‹ to 300‹ C. in the presence of recycled hydrolysis product of said nitrile, venting steam and ammionic vapours at about 200‹ to about 300‹ C. and at autogenous pressure, cooling to precipitate the aromatic carboxylic acid, separating said solid acid from the solution of soluble hydrolysis products and recycling said aqueous solution to a subsequent hydrolysis. Nitriles and/or other precursors of nitrile hydrolysis products can be added to the reaction mixture. To ensure that the acid products have a significantly lowered nitrogen content, the hydrolysis medium should contain 0À2 to 2À0 recycle carboxylic acid, hydrolysis equivalents per equivalent of nitrile charged. Examples of the nitriles used in the process are benzonitrile, phthalonitrile, terephthalonitrile, isophthalonitrile, toluonitriles and naphthonitriles.
GB524573A 1972-02-03 1973-02-02 Process for aromatic carboxylic acids Expired GB1377333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22330672A 1972-02-03 1972-02-03

Publications (1)

Publication Number Publication Date
GB1377333A true GB1377333A (en) 1974-12-11

Family

ID=22835938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB524573A Expired GB1377333A (en) 1972-02-03 1973-02-02 Process for aromatic carboxylic acids

Country Status (9)

Country Link
JP (1) JPS4881828A (en)
BE (1) BE794910A (en)
CA (1) CA969555A (en)
DE (1) DE2305265A1 (en)
FR (1) FR2169995B1 (en)
GB (1) GB1377333A (en)
IN (1) IN138900B (en)
IT (1) IT978344B (en)
NL (1) NL7301280A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075117A (en) * 1998-12-21 2000-06-13 E.I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 using dicarboxylic acids as the sole catalyst
US6084056A (en) * 1998-12-22 2000-07-04 E. I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 utilizing low catalyst levels
US6103863A (en) * 1998-12-22 2000-08-15 E. I. Dupont De Nemours & Company Process for preparation of polyamide from dinitrile and diamine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111100022A (en) * 2019-10-30 2020-05-05 石家庄市栾城区华英工贸有限责任公司 Method for preparing carboxylic acid compounds by catalyzing nitrile compounds to hydrolyze with Lewis acid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075117A (en) * 1998-12-21 2000-06-13 E.I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 using dicarboxylic acids as the sole catalyst
US6084056A (en) * 1998-12-22 2000-07-04 E. I. Dupont De Nemours & Company Process for the hydrolysis of adiponitrile and the production of nylon 6,6 utilizing low catalyst levels
US6103863A (en) * 1998-12-22 2000-08-15 E. I. Dupont De Nemours & Company Process for preparation of polyamide from dinitrile and diamine

Also Published As

Publication number Publication date
IT978344B (en) 1974-09-20
FR2169995B1 (en) 1978-12-01
NL7301280A (en) 1973-08-07
FR2169995A1 (en) 1973-09-14
IN138900B (en) 1976-04-10
DE2305265A1 (en) 1973-08-23
BE794910A (en) 1973-08-02
JPS4881828A (en) 1973-11-01
CA969555A (en) 1975-06-17

Similar Documents

Publication Publication Date Title
IE35303B1 (en) Process for the manufacture of hexamethylenediamine
GB884437A (en) Process for the manufacture of acrylonitrile
GB1377333A (en) Process for aromatic carboxylic acids
Mazzeo et al. Enzymic and chemical transformations of the side chain of cephalosporin C
ES8200337A1 (en) Process for the production of percarboxylic acids.
GB1326473A (en) Process for purifying alpha-l-aspartyl-l-phenylalanine methyl ester and intermediates in said process
GB1155016A (en) Process for the Temporary Protection of Carboxyl Groups
GB1316332A (en) Continuous production of alkali metal salts of anthranilic acid and of isatoic anhydride
GB1437834A (en) Process for the production of polycarboxylates with biological degradability
GB818434A (en) The decarboxylation of aromatic hydroxy acids
GB1379268A (en) Process for production of beta-alanine
IE31898B1 (en) Process for the production of urea
GB1439062A (en) Process for preparing alkyl transchrysanthemates and the corres ponding acids
GB1020491A (en) A process for the preparation of ornithine
GB801125A (en) Process for the production of ammonium salts of aromatic carboxylic acids
ES421033A1 (en) Process for preparing aromatic carboxylic acids
GB1306191A (en)
GB1443310A (en) Process for the production of neohesperidine dihydrochalcone
GB1230365A (en)
GB1018187A (en) Improvements in or relating to methods of producing 2,6-dichlorobenzonitrile
GB1264147A (en)
GB1263213A (en) Process for recovering acrylonitrile and hydrocyanic acid
ES396245A1 (en) Autocondensation of urea
GB942415A (en) Preparation of adipic and alkyladipic acids
FR2037356A6 (en) Concentrated albumin from cyclohexane - oxidation residues

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee