| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_69464d2b95051eb6fbbec252560d05e6 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-235
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C- |
| filingDate |
1999-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6322a0576ab6512bd94c3c44d5945e75
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f482b5e6e092bee129fadd8ecb1f8350
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_da81320150b3f9aaeed2cc0b927fc275 |
| publicationDate |
2001-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
TW-442463-B |
| titleOfInvention |
Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid |
| abstract |
A method for reducing carboxybenzaldehyde isomers in crude terephthalic and/or isophthalic acids is described. Crude TPA or IPA is dissolved in N-methyl pyrrolidone and is subsequently contacted with an oxidant, such as substantially anhydrous hydrogen peroxide, to convert the carboxybenzaldehyde isomer (4-CBA or 3-CBA) to TPA or IPA under moderate temperature and pressure conditions. |
| priorityDate |
1998-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |