http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H03227955-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/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C65-03 |
| filingDate | 1990-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1dfc1b3498c11be839523ba530bce9b6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7adcdc16f16fa6dd7eeaaa06b49c9759 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_84243dd462e631a20ec1385cb78a5659 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b978bf529193a45a5453bb5bb6416c86 |
| publicationDate | 1991-10-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H03227955-A |
| titleOfInvention | Production of p-hydrozybenzoic acid |
| abstract | PURPOSE: To advantageously separate and purify the title high-purity compound by dissolving a reaction product of potassium phenolate, acidifying with a mineral acid, separating and removing insoluble impurities under heating, cooling and extracting a precipitated solid with a solvent. n CONSTITUTION: In separating the title compound useful as a raw material for polymer materials from a reaction product containing sodium salt of the title compound prepared by reacting potassium phenolate or a mixture containing the compound with carbon dioxide, a water-soluble part of the reaction product is dissolved in water, acidified with a mineral acid, heated to dissolve the objective compound and insoluble impurities are separated under heating. Then the prepared heated aqueous solution is cooled, a precipitated solid is separated, the objective compound is extracted and separated from the precipitated solid using a solvent to dissolve the objective compound but not potassium salt of the mineral acid to advantageously give the high-purity objective compound advantageously with efficient removal of the impurities in the reaction mixture without using an expensive subsidiary raw material and a complicated device. n COPYRIGHT: (C)1991,JPO&Japio |
| priorityDate | 1990-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.