http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-806588-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12P13-08 |
| filingDate | 1957-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1958-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-806588-A |
| titleOfInvention | Resolution of dl-lysine with d-camphoric acid |
| abstract | L-Lysine is recovered from DL-lysine by reacting in an aqueous medium between 0.2 and 0.35 mol. of D-camphoric acid with one mol. of DL-lysine, precipitating the resulting di-L-lysine.D-camphorate with a C1-3 monohydric alcohol, decomposing the separated di-L-lysine.D-camphorate and recovering L-lysine therefrom. The by-product D-lysine may be racemized, e.g. by heating with NaOH solution, and recycled to the process. The precipitated di-L-lysine.D-camphorate may be dissolved in water and the L-lysine recovered therefrom either by passing the aqueous solution through a cation exchange resin followed by elution with ammonia, or by treatment with concentrated HCl or equivalent acid, separation of the D-camphoric acid, neutralizing with e.g. concentrated ammonia solution to a pH of 5 and precipitating the lysine as the hydrochloride by addition of acetone or a C1-3 monohydric alcohol. The precipitating alcohol is preferably methanol and is preferably added in such quantities as to form a medium containing 60 to 90 parts by weight of alcohol to 40 to 5 parts by weight of water. |
| priorityDate | 1956-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.