http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H021457-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b56b88668c3160a28353ed5d5e81e185 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-22 |
| filingDate | 1988-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_974220ab13da33fcced029224dfe899a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9a2612734912b32ec6643d59bf344e01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_025d559c2022e5c510ba0fc17fcfea3d |
| publicationDate | 1990-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H021457-A |
| titleOfInvention | Production of p-toluenesulfonic acid |
| abstract | PURPOSE: To economically obtain a compound useful as an organic acid catalyst, solubilizing agent for liquid synthetic detergents, etc., in high purity by adding water to a solution of a toluenesulfonic acid isomer mixture in toluene and separating the resultant deposited substance in the absence of water. n CONSTITUTION: Toluene is sulfonated with sulfuric acid to provide a solution of a toluenesulfonic acid isomer mixture in toluene. water is then added to the resultant solution to deposit p-toluenesulfonic acid-hydrate, which is then separated in the absence of water in an atmosphere, such as dry air, to afford the objective substance. In the sulfonation, toluene is present in a molar amount of ≥2 times based on the sulfuric acid in a volume of ≥1200ml based-on 1mol toluenesulfonic acid isomer mixture. The water is added in an amount of 0.4-0.7mol based on the toluenesulfonic acid isomer mixture. The objective substance is obtained without causing problems of sticking sulfuric acid, waste sulfuric acid, etc. n COPYRIGHT: (C)1990,JPO&Japio |
| priorityDate | 1988-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.