http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2002147352-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-62 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate | 2001-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d87953b9cd497d782fbe543b5c5b0911 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_742b6f2bd071353f05f3d2e51096ca28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7f8b484bdb8880f109c10f31d66cb231 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_302ab05488370b8bc1cdd79b4e390180 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4183f19df498ec0216193b4c2dcbe0c1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b22c79952ec494c9772a608343a2f666 |
| publicationDate | 2002-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2002147352-A1 |
| titleOfInvention | Process for producing ascorbic acid |
| abstract | The present invention comprises the use of sulfite additives to reduce discoloration of L-ascorbic acid produced from acid or aqueous solutions of 2-keto-L-gulonic acid. In one aspect, the present invention comprises a continuous process for producing L-ascorbic acid from an aqueous solution of 2-keto-L-gulonic acid. The use of sulfite additives reduces product stream color and improves product recovery by binding to high molecular weight reaction by-products. In a continuous process, the reaction stream is separated from residual sulfite and sulfite-bound by-products products to produce a product stream enriched in aqueous ascorbic acid for recovery, and an enriched 2-keto-L-gulonic acid stream which is recycled to the reactor. The in situ use of sulfite additives during the reaction increases the overall yield of L-ascorbic ascorbic acid, with no loss in selectivity of the synthesis. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114163406-A |
| priorityDate | 2000-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.