http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008275271-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a494b84ee015fe9cd51086e47cb681a6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bde51ce417a6d7e607f316c2c73b1ca2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C63-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-47 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-42 |
| filingDate | 2005-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9b64b4a9a7d5c21713a8c55cccbd0518 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a4dbcff507df1091ab52e38cb3a8df56 |
| publicationDate | 2008-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2008275271-A1 |
| titleOfInvention | Process for Preparing Purified Terephthalic Acid |
| abstract | The present invention relates to a process for preparing purified terephthalic acid [PTA,], comprising the steps: dissolving crude terephthalic acid [CTA] in an aqueous medium in a reactor; hydrogenating CTA at a temperature of about 260-320° C. and a pressure of about 1100-1300 psig using a hydrogenation catalyst; crystallizing terephthalic acid in the reactor by lowering the temperature of the solution to about 160° C. without evaporation cooling; transferring the content of the reactor to a filtration unit; filtrating the content at a temperature of about 140-160° C. and a pressure of about 40-100 psig, preferably 80-100 psig to obtain a filter cake, washing the filter cake obtained with water having a temperature of about 140-160° C. in the filtration unit; and drying the filter cake. |
| priorityDate | 2004-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.