ES421033A1 - Process for preparing aromatic carboxylic acids - Google Patents
Process for preparing aromatic carboxylic acidsInfo
- 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
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
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)
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) |
-
1973
- 1973-09-14 IN IN2109/CAL/1973A patent/IN141010B/en unknown
- 1973-09-20 IT IT2918573A patent/IT1044790B/en active
- 1973-11-23 DE DE19732358497 patent/DE2358497A1/en not_active Withdrawn
- 1973-11-30 ES ES421033A patent/ES421033A1/en not_active Expired
- 1973-12-14 GB GB5798173A patent/GB1411300A/en not_active Expired
-
1974
- 1974-05-09 FR FR7416007A patent/FR2229674B2/fr not_active Expired
- 1974-05-16 BE BE144389A patent/BE815120R/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IN141010B (en) | 1977-01-08 |
| IT1044790B (en) | 1980-04-21 |
| FR2229674B2 (en) | 1979-07-13 |
| FR2229674A2 (en) | 1974-12-13 |
| GB1411300A (en) | 1975-10-22 |
| DE2358497A1 (en) | 1974-12-05 |
| BE815120R (en) | 1974-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1188484A (en) | Process for production of a Free-Flowing Hop Acid Complex | |
| ES450803A1 (en) | Process for preparing amono-acid admides | |
| GB1326473A (en) | Process for purifying alpha-l-aspartyl-l-phenylalanine methyl ester and intermediates in said process | |
| GB1334834A (en) | Production of aminomethylene phosphonic acids | |
| ES421033A1 (en) | Process for preparing aromatic carboxylic acids | |
| GB1171020A (en) | A Process for Producing Alpha-Aminoacid and Apparatus used for the Production of Alpha-Aminoacid | |
| GB1306331A (en) | ||
| GB1176222A (en) | Hydrolysis of Aminonitriles | |
| ES387551A1 (en) | Method of removing dissolved ferric iron from iron-bearing solutions | |
| ES406823A1 (en) | Process for preparing citric acid | |
| ES422537A1 (en) | Aqueous lipid emulsion for parenteral alimentation | |
| GB1377333A (en) | Process for aromatic carboxylic acids | |
| GB1395826A (en) | Amino-acid resolution | |
| ES413238A1 (en) | Procedure for preparation of aromatic carboxylic acids. (Machine-translation by Google Translate, not legally binding) | |
| GB1346970A (en) | Preparation of lysine | |
| SU479763A1 (en) | Method for preparing 3-amino-ethylcarbazole hydrochloride | |
| ES420958A1 (en) | Process for the manufacture of alkyl benzimidazolylcarbamates | |
| ES380679A1 (en) | Procedure for the obtaining of alpha- (ciclohexil-1-hydroxy) -biturate of amino acids of basic character. (Machine-translation by Google Translate, not legally binding) | |
| SU487890A1 (en) | Method for chlorpromazine release | |
| GB1456446A (en) | Process for the production of dichlorobenzoic acids | |
| ES454076A1 (en) | Procedure for the monoacilation of an aromatic primary diamine. (Machine-translation by Google Translate, not legally binding) | |
| SU497283A1 (en) | Method for preparing benzoic or hydroxybenzoic acid α-oxyethyl esters | |
| GB1373275A (en) | Process for the preparation of carboxylic acids | |
| ES414765A1 (en) | Procedure for obtaining a new adamantamine derivative. (Machine-translation by Google Translate, not legally binding) | |
| SU1841245A1 (en) | Method of producing n,n'-dinitropiperazine |