http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108997175-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-42 |
| filingDate | 2018-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108997175-B |
| titleOfInvention | Method for preparing sodium m-nitrobenzenesulfonate and derivatives thereof by sulfonating chlorosulfonic acid |
| abstract | The invention discloses a method for preparing sodium m-nitrobenzenesulfonate and derivatives thereof by sulfonating chlorosulfonic acid, which comprises the following steps: 1) adding nitrobenzene raw materials and chlorosulfonic acid into a reaction container, wherein the molar ratio of the nitrobenzene raw materials to the chlorosulfonic acid is 1: 0.4-0.6, and heating to 90-150 ℃ for heat preservation to perform sulfonation reaction; hydrogen chloride gas generated in the sulfonation reaction process is discharged out of the reaction system in time; 2) and carrying out post-treatment on the reaction liquid obtained in the step 1) by using sodium alkali to obtain the sodium m-nitrobenzenesulfonate or the derivatives thereof. The invention adopts a reverse thinking mode, reduces the dosage of the chlorosulfonic acid until the dosage is less than that of the nitrobenzene, thereby realizing that a small amount of the chlorosulfonic acid is converted by the excessive nitrobenzene; thus, the process of the present invention does not have the problem of dealing with residual chlorosulfonic acid. And the excessive nitrobenzene can be easily recycled, and the hydrogen chloride as a byproduct is also easily separated and recycled. |
| priorityDate | 2018-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 113.