http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109851586-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D303-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D301-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C9-15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C7-06 |
| filingDate | 2017-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109851586-B |
| titleOfInvention | Process for purifying propylene oxide |
| abstract | The invention relates to a method for purifying propylene oxide, which mainly solves the problems of low purity of an extracting agent, increased loss, low yield of the propylene oxide and high energy consumption caused by accumulation of heavy component impurities in the prior art. The process includes providing a feed stream comprising propylene oxide, an extractant, and impurities including 1, 2-propanediol; said feed stream is passed to a separation column having a first reboiler; the separation column is operated under conditions sufficient for the extractant and 1, 2-propanediol to form an azeotrope; collecting a first material flow containing an extractant and 1, 2-propylene glycol azeotrope from the side line of the separation tower, obtaining a second material flow containing the extractant from the tower bottom, and obtaining a third material flow containing propylene oxide from the tower top; and at least one part of the second stream enters an extractant purifier, the obtained fourth stream of the gas-phase light component returns to the separation tower, and the impurity stream of the liquid-phase first heavy component is subjected to post-treatment. The method can be used in the industrial production of propylene oxide. |
| priorityDate | 2017-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.