http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114685402-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_53e18a4d2c91432f25c1ea1c49c0d502 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D305-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D305-12 |
| filingDate | 2020-12-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_db3c06c505bdf35ba1ee3d83da404cf3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48bea841a6d560d9749e181e84b61ffc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff50f63b481518b8c23ca4cf86d4d21d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_80f593a1b22b647aba97fb054c96039e |
| publicationDate | 2022-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114685402-A |
| titleOfInvention | A kind of method for preparing high-quality diketene by eutectic crystallization |
| abstract | The invention belongs to the field of chemical industry, and in particular relates to a method for preparing high-quality diketene by eutectic crystallization, which comprises: (1) vacuum distillation of crude diketene to obtain semi-finished products with a content of 98-99%; (2) under normal pressure , add diketene semi-finished product whose volume is 80-90% of its volume into the crystallizer; (3) the crystallizer is slowly cooled down to discharge the uncrystallized mother liquor; (4) the temperature of the crystal in the crystallizer is heated, and the sweat of melting impurities is discharged in the process (5) the remaining crystals are rapidly heated up again, and after the crystals are all melted, the finished product diketene is obtained; (6) the mother liquor in the step (2) is subjected to vacuum distillation to obtain a semi-finished product, which is combined with the sweat of the step (3) and applied to Step (2). The invention utilizes the static eutectic crystallization technology to increase the purity of diketene to more than 99.5%, and through the composite process of eutectic crystallization and vacuum distillation, the total yield is increased to 98%. |
| priorityDate | 2020-12-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.