http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2398722-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_14effe3850d2129f863b969dac4f1db8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C301-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-08 |
| filingDate | 1978-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1979-02-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | FR-2398722-A1 |
| titleOfInvention | IMPROVEMENTS FOR THE PREPARATION OF AQUEOUS SOLUTIONS OF ALKALINE SALTS OF 2-HYDROXY-1-NAPHTALENESULPHONIC ACID |
| abstract | For this preparation, use is made of the sulfonation of 2-hydroxy-naphthalene BN with chlorosulfonic acid (C1SO3 H) in an organic solvent immiscible with water MNB followed by alkalization of the sulfonic acid obtained. According to the invention, BN and C1SO3 H are introduced continuously at 0-50 degrees C into a reactor I in proportions such that the molar ratio C1SO3 H / BN is from 0.95 to 1.15 and the reaction mixture is maintained in reactor I for 1 to 120 minutes before being basified in II. These measures improve the yield of BN, the productivity of the process and the purity of the product obtained. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2398727-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2398724-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2398723-A1 |
| priorityDate | 1977-07-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.