http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-770262-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d32a92942370d0b0102b54e85c87d81b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C277-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C279-04 |
| filingDate | 1955-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-770262-A |
| titleOfInvention | Separation of guanidine values |
| abstract | Guanidine values are separated from a solution containing a guanidine salt and at least one ammonium salt by reacting the guanidine salt in said solution with a soluble tetraborate to precipitate guanidine tetraborate and separating the precipitate from the residue of the solution. The guanidine salt may be, for example, the sulphate, nitrate, chloride, sulphamate, thiocyanate or bicarbonate. The soluble tetraborate used may be ammonium, sodium or potassium tetraborate and may be added as an aqueous solution in the ratio of 1 mol. of tetraborate for each 2 mols. of guanidine salt. The precipitation is preferably conducted at low temperature such as 10 DEG to 20 DEG C. The guanidine tetraborate so obtained may be converted to another guanidine salt by treatment with an acid, e.g. sulphuric acid, the boric acid being recovered. In an example, a reaction product comprising guanidine thiocyanate, ammonium thiocyanate, thiourea and melamine, formed by the fusion of ammonium thiocyanate, is treated with aqueous ammonium tetraborate and the precipitated guanidine tetraborate is filtered, washed and dried. Examples are mentioned in which solutions containing guanidine hydrochloride and guanidine sulphate respectively are similarly treated. |
| priorityDate | 1955-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.