http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0413656-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2baf849d216e689ecc40ccc931a7a7bc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-06 |
| filingDate | 1990-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb185fc09d5e23d9612452075ee1dfb3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7e635808cb993fcf2b5770575d955b8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fafbe1ed09fc42b98f4b3cacd0ca13ce |
| publicationDate | 1992-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H0413656-A |
| titleOfInvention | Production of 4-nitrotoluene-2-sulfonic acid |
| abstract | PURPOSE: To obtain the subject compound with a low content of sulfuric acid formed as a by-product and hardly any coloring by adding sulfuric acid to 4-nitrotoluene before reaction and then carrying out sulfonation under specific conditions in sulfonating the 4-nitrotoluene with SO 3 gas diluted with an inert gas. n CONSTITUTION: 4-Nitrotluene is sulfonated with SO 3 gas diluted with an inert gas to provide 4-nitrotoluene-2-sulfonic acid. In the process, sulfuric acid in an amount of 1-8wt.% based on the 4-nitrotoluene is added before carrying out sulfonating reaction. The SO 3 gas diluted with the inert gas is blown thereinto at a concentration of 5-10vol.% until the sulfonation ratio attains 85-95% and further at a concentration of 1-5vol.% until the sulfonation ratio exceeds 85-95% and sulfonating reaction is completed. The reaction temperature is kept at 80-100°C until the sulfonation ratio attains 40-60% and then 100-120°C until the reaction is completed. Thereby, the sulfonating reaction is carried out to suppress the content of the sulfuric acid and afford the subject compound. The resultant compound is optimum for a raw material used in reaction for forming stilbene. n COPYRIGHT: (C)1992,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108586296-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108586296-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4576026-B2 |
| priorityDate | 1990-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.