| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_32260d8b93ef37639f57fb1f65e8a5fa |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2208-00592 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J8-0492
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-1806
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C31-205
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-0237
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-188
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-1837
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J8-009
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J8-0085 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C31-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-48 |
| filingDate |
2020-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_60482a29b5ab963e6e2cb526d4ab59ed
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bbf54db8f11e933ae65a63f3544f9eab
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_633961c04470176ff838dea61018541f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ba8a51b5cc97374242969bb7e98af23
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9c31578d847935dceec5689c5f49106
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70d6270be688a1d0b10459c97a852282
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_75fe20cf7ce9612556979ef8b2eff967 |
| publicationDate |
2022-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-3988524-A1 |
| titleOfInvention |
A method for the preparation of 1,2-propanediol |
| abstract |
The method for preparing 1,2-propanediol comprises the steps (a) reacting propene with hydrogen peroxide in the presence of a phase transfer catalyst and a heteropolytungstate in a liquid reaction mixture comprising an aqueous phase with a maximum apparent pH of 6 and an organic phase comprising a solvent having a solubility in water at 20 °C of less than 500 mg/kg; (b) separating the liquid reaction mixture of step a) into an aqueous phase comprising 1,2-propanediol and an organic phase; (c) recycling at least a part of the separated organic phase to step a); (d) extracting the separated aqueous phase with an extractant solution comprising the same phase transfer catalyst and solvent as used in step a) to provide an extracted aqueous phase and an extract phase; (e) recycling at least a part of the extract phase to step a); and (f) recovering 1,2-propanediol from the extracted aqueous phase. |
| priorityDate |
2020-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |