http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109879771-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c333a0ed7c30e685cda0d06f37dbfa22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C311-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C311-39 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C233-07 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-88 |
| filingDate | 2019-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_93f923c9a2a22525fef0fc0f520b493b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_15ca6ea43f0332448486a409d97f6b9f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf5494142b9676f45a3f78c659daa8f3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ec06bea5c00905c465d1da1f300ff5c9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9aa698bd8501fe6d8a48e9773455ac09 |
| publicationDate | 2019-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109879771-A |
| titleOfInvention | A kind of method for synthesizing p-aminobenzenesulfonamide with acetanilide as raw material |
| abstract | The invention discloses a method for synthesizing p-aminobenzenesulfonamide using acetanilide as a raw material, comprising the following steps: preparing acetanilide; preparing p-acetanilide chloride; preparing p-acetanilide and hydrolyzing to obtain sulfonamide. Aiming at the problem of limited increase in the yield of ASC in the chlorosulfonation reaction, the preparation process was improved from the perspectives of acetanilide and ASC, and the yield of acetanilide was greatly improved by using aniline, toluenesulfonic acid, cyclohexane, etc. to synthesize acetanilide. And the process is economical and environmentally friendly. By adding phosphorus pentoxide as a reactant, using its characteristics of water absorption and promoting the forward progress of the reaction, the output of ASC is greatly increased, and carbon tetrachloride is added as a solvent to reduce the viscosity of the reaction mixture and increase the chlorosulfonic acid. Solubility makes the reaction more sufficient and further improves the yield of sulfonamide. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110724074-A |
| priorityDate | 2019-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 58.