http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20060107859-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4d0bc14697bfe2291a34832d1b7fdd67 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-82 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-333 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82 |
| filingDate | 1999-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e9a15aba4368b1b4cf5115d5644cc201 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_654bd09a17ae42a3f91ee3babbfc540e |
| publicationDate | 2006-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20060107859-A |
| titleOfInvention | Preparation and Purification Methods of Bis-β-hydroxyethyl terephthalate |
| abstract | The aromatic polyester is preliminarily decomposed by heating with bis-β-hydroxyethyl terephthalate and / or its low condensate, followed by reaction with ethylene glycol to convert the terephthalic acid component of the predegradation into bis-β-hydroxyethyl terephthalate and / or Or its low condensate.n n n A solution composition obtained by such a method, i.e., a solution composition of ethylene glycol, bis-β-hydroxyethyl terephthalate and bis-β-hydroxyethyl terephthalate containing a cation and / or an anion as an impurity is prepared by cation exchanger and / or By contacting with an anion exchanger to remove cations and anions as impurities, bis-β-hydroxyethyl terephthalate having a low ion content is produced.n n n Bis-β-hydroxyethyl terephthalate-containing mixtures containing less ions are initially evaporated or distilled to distill off compounds having a lower boiling point than bis-β-hydroxyethyl terephthalate, followed by evaporation or distillation under reduced pressure to purify bis-β -Give hydroxyethyl terephthalate.n n n In this way, the refined bis- (beta) -hydroxyethyl terephthalate whose total content of a cation and an anion is 15 ppm or less is obtained. |
| priorityDate | 1999-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.