http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H11322717-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e83d93ed02bbd6159e99b5a7796e3686 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-80 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-803 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-83 |
| filingDate | 1999-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_42b705c3365e034030ee6aac0ef71967 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2e7c05e3357245eac5b25c9a1286439 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dfe285fcdece1b34da7f7ebc08a77a79 |
| publicationDate | 1999-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H11322717-A |
| titleOfInvention | Method for recovering pyridine-2,3-dicarboxylic acid |
| abstract | (57) [Summary] (Modified) [PROBLEMS] To provide a method for recovering pyridine-2,3-dicarboxylic acid from a process stream in a process for producing pyridine-2,3-dicarboxylic acid. A process wherein a process stream is subjected to nanofiltration at a pH greater than 4.5 and a pyridine-2,3-dicarboxylic acid containing concentrate is utilized. Preferably, the pH is selected to be between 7 and 9 and the concentration factor in nanofiltration is greater than 3. In a suitable embodiment, the process stream is formed by the mother liquor obtained in the production of pyridine-2,3-dicarboxylic acid by oxidizing the appropriate quinoline or the corresponding 2,3-lutidine and separating off the solid material. . |
| priorityDate | 1998-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.