http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2237914-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_42ada8aa4af7c5628305e7cc3c327372 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-24 |
| filingDate | 1999-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2005-08-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45613dd53a52a2b96cae945afe35e0d7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_713bb91889d69f8975ca9a2e644c62c4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_91eae853abec639f1dd95c61c29800a3 |
| publicationDate | 2005-08-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2237914-T3 |
| titleOfInvention | METHOD FOR PREPARING TEREFTALIC ACID AND PURIFIED ISOFTALIC ACID FROM MIXED XYLENE. |
| abstract | A process for separating and purifying terephthalic acid (TPA) and raw isophthalic acid (IPA) from a liquid dispersion consisting of TPA, IPA and other impurities produced from the oxidation of mixed xylenes comprising: a) dissolving the crude TPA in a solvent of selective crystallization at a temperature between 50 ° C and 250 ° C to form a solution; b) crystallize purified acid from said solution by reducing the temperature and / or pressure thereof, and separating said purified crystallized TPA from said solution; c) adding an anti-solvent to said solution from which said purified crystallized TPA is separated to cause precipitation of substantially all of the remaining TPA in said solution; d) separating said precipitated TPA; e) evaporate the solvents from the solution to cause crystallization of IPA, and purify and recover the purified IPA in that way. |
| priorityDate | 1998-05-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.