http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02160747-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6402b23ab8782152be47b3996e48a4a |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C65-03 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-02 |
| filingDate | 1988-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b978bf529193a45a5453bb5bb6416c86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b7c08abbca2abc6da6fefbe56c6643b7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7adcdc16f16fa6dd7eeaaa06b49c9759 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_84243dd462e631a20ec1385cb78a5659 |
| publicationDate | 1990-06-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H02160747-A |
| titleOfInvention | Production of hydroxybenzoic acid |
| abstract | PURPOSE: To obtain the title compound which is used as a starting substance for dyes and medicines in high purity and high yield suitably by using a specific alcohol as a solvent for acidic precipitation with oxalic acid from a solution containing an alkali metal salt of hydroxybenzoic acid. n CONSTITUTION: At least one selected from alcohols of 1 to 4 carbon atoms such as methanol, ethanol or 1-propanol, preferably methanol is used as a solvent to effect acidic precipitation of an alkali metal salt of hydroxybenzoic acid with oxalic acid at room temperature within 1 hour. The alcohol used in the present invention may contain a small amount of water and alcohol of 5 or more carbon atoms and hydrocarbons, but their concentrations are preferably less than 10wt.%. Inorganic acid may be mixed, as long as the concentration is less than 1wt.%. The amount of the solvent is preferably 0.5 to 2 litters per mole of the starting substance. n COPYRIGHT: (C)1990,JPO&Japio |
| priorityDate | 1988-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.