http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1449822-A4
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6c8d4dc7bd1a30d8fda907fceaeb4e69 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-353 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-363 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-353 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-363 |
| filingDate | 2002-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5096a2e1891fc3b2528b96aa40d1f040 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e8f207a082772f1d04db97aac97dd414 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d001f8e9ac4122ad22a7688810b035b5 |
| publicationDate | 2006-03-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1449822-A4 |
| titleOfInvention | PROCESS FOR PRODUCING TRANS-1,4-CYCLOHEXANEDICARBOXYLIC ACID |
| abstract | (1) A method for producing trans-1,4-cyclohexane dicarboxylic acid (t-CHDA), which comprises heating a crude CHDA to a temperature of 180°C or higher and retaining the temperature thereof in a region of 180°C or higher and less than the melting point of t-CHDA, to precipitate t-CHDA formed by isomerization in a molten cis-1,4-cyclohexane dicarboxylic acid (c-CHDA); (2) a method for producing t-CHDA, which comprises subjecting a crude CHDA in a powdery grain form to a heat treatment at a temperature of not lower than the melting point of c-CHDA and lower than the melting point of t-CHDA, to isomerize CHDA from its cis form to trans form while retaining a powdery grain form; (3) a method for producing t-CHDA, which comprises retaining the temperature of a crude CHDA in a region of not lower than the melting point of c-CHDA and lower than the melting point of t-CHDA, while allowing the crude CHDA to flow, to prepare a t-CHDA in a powdery grain form; (4) a method for purifying a crude CHDA which comprises heating a crude CHDA prepared by a process comprising hydrogenating TPA or the like in an inert gas atmosphere, to remove impurities through vaporization. The above methods allow the isomerization of c-CHDA for the production of a high purity t-CHDA to be carried out with good efficiency by the use of a simple and easy procedure. |
| priorityDate | 2001-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.