http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3988530-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_32260d8b93ef37639f57fb1f65e8a5fa |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-0237 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C31-205 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-188 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J3-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C31-20 |
| filingDate | 2020-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2838c4612084b5a8e110ca7b953f9982 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9c31578d847935dceec5689c5f49106 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70d6270be688a1d0b10459c97a852282 |
| publicationDate | 2022-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-3988530-A1 |
| titleOfInvention | A method for the preparation of 1,2-propanediol |
| abstract | 1,2-propanediol is prepared by a method comprising step a) of reacting propene with hydrogen peroxide at 50 to 110 °C in the presence of a catalyst mixture comprising a phase transfer catalyst and a polytungstophosphate in a liquid reaction mixture comprising an aqueous phase with a maximum apparent pH of 6 and an organic phase; step b) of separating the reaction mixture into an aqueous phase (P a ) comprising 1,2-propanediol and an organic phase (P o ); step c) of recycling at least part of the separated organic phase (P o ) to step a); step d) of recovering 1,2-propanediol from the aqueous phase (P a ); and step e) of reacting a tungstate with hydrogen peroxide and phosphoric acid at 5 to 40 °C in the presence of the phase transfer catalyst in a liquid mixture comprising an aqueous and an organic phase, followed by passing at least a part of the resulting organic phase comprising the polytungstophosphate and phase transfer catalyst to reaction step a). |
| priorityDate | 2020-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 63.