http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-797176-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_69c91bbf0395db010b4806f50d808c4e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07H23-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07H23-00 |
| filingDate | 1956-08-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1958-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-797176-A |
| titleOfInvention | Improvements in or relating to the production of vitamin b |
| abstract | Colloidal impurities are separated from aqueous concentrates containing Vitamin B12 in a process in which said impurities are precipitated from said concentrates by the addition of one or more water-soluble compounds of metals falling within the analytical groups 1, 2a, 2b, 3a or 3b capable of forming substantially water-insoluble compounds with said impurities. As water-soluble metal compounds there may be used water-soluble compounds of lead, mercury, tin, iron, aluminium and zinc. During or after treatment of the concentrates the pH is made alkaline, e.g. in the range 7-10. Examples describe the purification of the residue of the bacterial fermentation of sewage and of a concentrate obtained from a culture medium of the antibiotic oxytetracycline making use of lead acetate and aluminium sulphate solutions. |
| priorityDate | 1955-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.