http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0383960-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ecc58e5fd0006c472fea1ec2f879638c |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-35 |
| filingDate | 1989-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_98a8e57a1de82f369c779e4fad332686 |
| publicationDate | 1991-04-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H0383960-A |
| titleOfInvention | Production of beta-naphthalenesulfonic acid |
| abstract | PURPOSE: To obtain the subject substance in high yield and purity by separating β-naphthalenesulfonic acid from crude naphthalene-sulfonic acid using an aromatic hydrocarbon as a solvent and cooling the extract to effect the crystallization and separation of the subject compound. n CONSTITUTION: β-Naphthalenesulfonic acid is extracted from crude naphthalenesulfonic acid by using 1-50 times volume of an aromatic hydrocarbon (e.g. toluene, xylene or ethylbenzene) at a time or in divided steps and the extraction solvent is distilled off to obtain the objective compound in high purity. The purity of the compound can be further improved by cooling the extract and separating the precipitated crystals. Since isolated naphthalene and by-produced dinaphthylsulfone have high solubility in aromatic hydrocarbon, these compounds can be extracted and separated from the sulfonation product with a small amount of an extraction solvent especially at ≤60°C. The subject substance is useful as a raw material for pharmaceuticals, a modifier for functional resin, a synthetic catalyst, etc. n COPYRIGHT: (C)1991,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109052776-A |
| priorityDate | 1989-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.