http://rdf.ncbi.nlm.nih.gov/pubchem/patent/BR-112013018066-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7ea1bd1db35580c5b52e931ac2b7fc01 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W90-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L67-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F124-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-0045 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D319-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-0013 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D19-0036 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-785 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D319-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D9-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D9-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D9-00 |
| filingDate | 2011-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_19ef1022d5923a2ec0dfee439d29a178 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9772ed2720bc0e516bd4f0887d8e1fc4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1b4dddf3e263cde9a1871951dbcea9e4 |
| publicationDate | 2016-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | BR-112013018066-A2 |
| titleOfInvention | method for the preparation of a polyhydroxy carboxylic acid |
| abstract | A method for preparing a polyhydroxy carboxylic acid The present invention relates to a method which is described for preparing a polylactic acid comprising the steps of: performing a ring gap polymerization using a catalyst and a killer catalyst compound or If a final wrap additive obtains a crude polylactic acid of mw greater than 10,000 g / mol, purify the crude polylactic acid by removing and separating low boiling compounds comprising lactide and crude polylactic acid impurities by devolatizing the point compounds. low boiling as a gas phase stream, purify the devaluation lactide and remove gas phase impurities from evaporated low boiling compounds by condensing the evaporated gas phase flow to give a condensed flow and a subsequent melt crystallization of the condensed stream, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such as the purified lactide is polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for performing the method comprising: a polymerization reactor for performing a ring opening polymerization to obtain a crude polylactic acid, a devolatization apparatus for removing and separating low boiling compounds comprising lactide and impurities of a crude polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities from a condensed stream, wherein a condenser for condensing a gas phase stream to give a condensed stream is disposed between the devolatization apparatus and the crystallization apparatus. |
| priorityDate | 2011-02-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.