http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5553240-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e43b4ca6b41ce9f54c9a895d474c81a |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-52 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C65-03 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-367 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-00 |
| filingDate | 1978-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5364dfb833e18dd5c01d7d33839387fe |
| publicationDate | 1980-04-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5553240-A |
| titleOfInvention | Preparation of m-substituted benzoic acid |
| abstract | PURPOSE: To obtain m-oxybenzoic acid, economically and easily, in high yield and high purity, by chlorinating benzoic acid in water or dilute sulfuric acid, filtering the product under heating, and further hydrolyzing with alkali using copper, copper hydroxide or copper oxide as a catalyst. n CONSTITUTION: Benzoic acid is chlorinated in water or less than 30wt% of dilute sulfuric acid, by blowing chlorine at 40W70°C. After the reaction, crystals are separated by filtration preferably at 40W70°C, to obtain highly pure m-chlorobenzoic acid with low content of harmful dichlorobenzoic acid. The m-chlorobenzoic acid is hydrolyzed in an aqueous solution containing 0.8W3 times weight of an alkali (NaOH, etc.) based on the m-chlorobenzoic acid, at 200W260°C in the presence of a catalyst comprising preferably 0.1W20wt% of copper, copper hydroxide or copper oxide. The hydrolysis reaction is carried out smoothly, without inhibiting effect of the dichlorobenzoic acid, and the desired compound is obtained in high purity. The weight ratio of the benzoic acid to water, etc. is 1 to 20W60. n COPYRIGHT: (C)1980,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012255014-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2023027168-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-02055475-A1 |
| priorityDate | 1978-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.