http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H04308548-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_46ffc67cd29dd51dbd0bc0e335dd3994 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-303 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C53-126 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C53-124 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C53-122 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C53-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C53-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-02 |
| filingDate | 1991-12-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b9c748f64169320409878b53b0cbae43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0529445a392011104048bf865bbcbd76 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e9202a9addcc834a49a7479c9ae28a4 |
| publicationDate | 1992-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H04308548-A |
| titleOfInvention | Method for refining carboxylic acid |
| abstract | PURPOSE: To remove iodide and oxidative impurities from carboxylic acids, more particularly acetic acid produced by carbonylation. n CONSTITUTION: At the time of refining up to 6C impure carboxylic acids, more preferably acetic acid, contg. the iodides and oxidative impurities produced by the adequate carbonylation of the reactant in the presence of a carbonylation catalyst and iodide accelerator, a) the carboxylic acid is brought into contact with hydrogen peroxide in the presence of a strong acid, more particularly sulfuric acid and thereafter, b) the refined carboxylic acid is recovered by distillation or evaporation from this product. The iodide impurities are decreased down to about 55 to ≤50 ppb according to this method. The oxidative impurities may be decreased to the extent that the carboxylic acid is accepted in a permanganate test. The stage (b) is preferably executed in the presence of a metal salt (more particularly potassium acetate) for reducing sulfur contamination and/or a metal salt (more preferably calcium acetate) for reducing peroxide. n COPYRIGHT: (C)1992,JPO |
| priorityDate | 1991-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.