http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114315788-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d624bc2c5895f4a47b65f440504578cf |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D319-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-664 |
| filingDate | 2021-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1f04f214936ad1f3ac02d6e0e92d3d24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9bda9086e0dc381cb9e9c2663c0ee55f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eac9356dc46d8c2325515c481be2aba4 |
| publicationDate | 2022-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114315788-A |
| titleOfInvention | A kind of preparation method of lactide |
| abstract | The invention discloses a preparation method of lactide, which comprises the following steps: dehydration and oligomerization of lactic acid monomers, polyethylene glycol polymers and polycarboxylic acids under the action of catalysts to obtain hyperbranched oligomeric lactic acid, and then cracking produce lactide. The process of the invention adds polyethylene glycol polymers and polyvalent carboxylic acids during the oligomerization of lactic acid to synthesize hyperbranched oligomeric lactic acid with random structure, which increases the number of end groups and improves the cracking speed of oligomeric lactic acid. The addition of polyethylene glycol polymers can reduce the viscosity of oligomeric lactic acid in the later stage of dehydration when the viscosity is large, thereby increasing the water distillation rate and the reaction rate. The random structure of oligomeric lactic acid has a low melting point, thereby reducing the The cracking temperature of the oligomeric lactic acid reduces the carbonization rate of the oligomeric lactic acid, and can increase the contact area of the oligomeric lactic acid, thereby improving the mass transfer and heat transfer efficiency of the oligomeric lactic acid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114957196-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115232102-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115160289-A |
| priorityDate | 2021-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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