http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3988534-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/B01J31-0237 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C43-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J31-0239 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-188 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C31-205 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C41-05 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C41-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C43-11 |
filingDate | 2020-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70d6270be688a1d0b10459c97a852282 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9c31578d847935dceec5689c5f49106 |
publicationDate | 2022-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber | EP-3988534-A1 |
titleOfInvention | A method for the preparation of 1,2-propanediol and dipropylene glycol |
abstract | The method for preparing 1,2-propanediol and dipropylene glycol comprises step a) of continuously reacting propene with hydrogen peroxide in the presence of a catalyst mixture comprising 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 to obtain 1,2-propanediol and dipropylene glycol; step b) of separating the reaction mixture into an aqueous phase (P<sub>a</sub>) comprising 1,2-propanediol and dipropylene glycol and an organic phase (P<sub>o</sub>); step c) of recycling at least part of the separated organic phase (P<sub>o</sub>) to the reaction step a); and step d) of recovering 1,2-propanediol and dipropylene glycol from the separated aqueous phase (P<sub>a</sub>); wherein the reaction heat generated in step a) is at least partially removed and the ratio of 1,2-propanediol to dipropylene glycol is controlled by adjusting the weight ratio of hydrogen peroxide to water fed to 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: 67.