| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cd4f9036014be649badaaea71aabb93c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_19933ed3b58d45bb87323209f37f61cd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4a6ed10424093320ebac39d4aa5ed603
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_18a8284bc1d41fe092e46c249d6220be |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-83
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-866 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-183
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L67-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-866
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-83 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-83
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-86
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-00 |
| filingDate |
2010-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2014-10-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_85b79d598ead910e55d57e6f1c83448f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cd218073bab9b20226578836155e945d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3e67d2d637d8680caaae5a0cd3adc402 |
| publicationDate |
2014-10-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-8859713-B2 |
| titleOfInvention |
Process for making polyethylene terephthalate |
| abstract |
The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 30 mol % comonomer, using a catalyst system essentially consisting of antimony—(Sb), zinc—(Zn) and phosphorous—(P) compounds, comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomers (DGT), and b) melt-phase polycondensing DGT to form polyester and EG1 wherein the Sb- and P-compounds are added in step a) and the Zn-compound is added after step a). With this process PET can be obtained that shows favorable color and optical clarity, also if recycling of EG is applied in the process, and a relatively low rate of acetaldehyde regeneration during melt-processing. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9534080-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2015329667-A1 |
| priorityDate |
2009-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |