http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110256302-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-44 |
| filingDate | 2019-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110256302-B |
| titleOfInvention | A kind of method for complex extraction to produce H acid |
| abstract | The invention discloses a method for producing H acid by complex extraction, comprising the following steps: 1) cooling the nitro-T acid reaction liquid after sulfonation, nitrification and denitration of refined naphthalene, and precipitating the nitro-T acid solid; 2) After the nitro-T acid solid is added with water to make a pulp, neutralize it with the H acid-base molten mother liquor, and remove and collect the generated sulfur dioxide; 3) the filtrate is extracted with a complex extractant, and the sulfuric acid content in the remaining filtrate after extraction is 30% -50%, after the extraction liquid is washed with water and back-extracted with lye, the sulfuric acid content in the washing liquid is 15-25%; 4) the nitro T salt solution obtained in steps 2) and 3), after catalytic hydrogenation or After the iron powder is reduced, acidify and filter to obtain an amino acid solution; 5) add alkali and methanol to the amino acid solution to carry out alkali melting, acidify the alkali melt with the sulfur dioxide collected in step 2), filter the obtained solid, add water Beating, then using the washing solution in step 3) for acidification and filtration, and the filter cake is washed with water, filtered and dried to obtain a product. |
| priorityDate | 2019-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 57.