http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3402622-C2
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C301-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-28 |
| filingDate | 1984-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1986-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1986-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-3402622-C2 |
| titleOfInvention | Process for the preparation of diphenyl-4,4'-disulfonic acid |
| abstract | Diphenyl-4,4'-disulfonic acid is produced by sulfonating diphenyl with sulfur trioxide in the presence of an inert solvent. For this purpose, diphenyl and sulfur trioxide are reacted at a temperature of -30 ° C. to + 60 ° C. in such a way that during the bringing together of the reactants the ratio is 2-3 moles of sulfur trioxide per mole of diphenyl. Examples of suitable solvents are chloroalkanes, such as methylene chloride or sulfur dioxide. The reaction can be carried out in the presence of an inhibitor which suppresses sulfone formation. Before the sulfonation begins, a small amount of diphenyl-4,4'-disulfonic acid can also be placed in the reactor. |
| priorityDate | 1984-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.