http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2434980-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e559abcd8f120b071dc1162360867ffa |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C315-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C317-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C315-04 |
| filingDate | 2002-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2010-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7263afb26c53da0b10e0893c4d2f9be2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_db65c082715e6b1acf14a7697f52d82e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_350940dce475494ae99a7dc7d74828d7 |
| publicationDate | 2010-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2434980-C |
| titleOfInvention | Purification of 2-nitro-4-methylsulphonylbenzoic acid |
| abstract | A method for removing impurities from 2-nitro-4-methylsulfonylbenzoic acid which comprises at least two of the following steps, in any order, (a) dissolving 2-nitro-4-methylsulfonylbenzoic acid in water at a pH of about 2 to 10, followed by filtration; (b) contacting an aqueous solution of 2-nitro-4-methylsulfonylbenzoic acid with activated carbon at a pH of about 2 to 10; (c) treating an aqueous solution of 2-nitro-4-methylsulfonylbenzoic acid with sufficient base to hydrolyze undesired nitro and dinitro substituted impurities; followed by maintaining the resulting aqueous solution comprising 2-nitro-4-methylsulfonylbenzoic acid at a temperature of up to about 95~C, and adjusting the pH of said solution to about a pH which is sufficient to effect crystallization of 2-nitro-4-methylsulfonylbenzoic acid upon cooling. |
| priorityDate | 2001-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.