http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6167498-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6cfc033f059d282fcd915bc8be2ae53f |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12P41-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C237-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B57-00 |
| filingDate | 1984-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df18d82388a6ec7d8be05db2941d420a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b7aa71ba5053fffbba01e1c7c99f084 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_835077a12a6c5af9b3c496b2d711edb4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45a96ddedc61e2381bbc78469955e67d |
| publicationDate | 1986-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6167498-A |
| titleOfInvention | Production of d-valine and l-valine from isopropyl hydantoin |
| abstract | PURPOSE: To produce high-purity D-valine and L-valine, by hydrolyzing isopropyl hydantoin with an alkali, and subjecting the reaction liquid containing DL-valine to a specific treatment. n CONSTITUTION: Isopropyl hydantoin is mixed with an alkali and water, and hydrolyzed at ≤100°C. The obtained reaction liquid containing DL-valine is acetylated with acetic anhydride at 20W30°C, and N-acetyl-DL-valine is precipitated from the mixture with an acid. The N-acetyl-DL-valine is dissolved in water at a concentration of 5W40wt%, added with aminoacylase to effect the exclusive hydrolysis of the acetyl group of the N-acetyl-L-valine and obtain an acylase reaction liquid containing N-acetyl-D-valine and L-valine. The reaction liquid is adjusted to ≤1pH with an acid to effect the crystallization of N-acetyl-D- valine, which is separated by solid-liquid separation process and hydrolyzed with an acid to obtain D-valine. The acidic filtrate is made to contact with a strongly acidic ion exchange resin to effect the adsorption of L-valine, and the adsorbed L-valine is eluted. n COPYRIGHT: (C)1986,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S632960-A |
| priorityDate | 1984-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 43.