http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2743164-C1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7bc9b0861601ab6403a454e4d91cc7da |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D285-125 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D285-125 |
| filingDate | 2020-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a742aa7b8a7ce7c36b76953f3e0afe90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_14f130f616acad8607d7d3320a3d2b10 |
| publicationDate | 2021-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2743164-C1 |
| titleOfInvention | Method for the preparation of 2,5-dimercapto-1,3,4-thiadiazole (dmtd) |
| abstract | FIELD: chemistry. n SUBSTANCE: invention relates to a method for the preparation of 2,5-dimercapto-1,3,4-thiadiazole, which involves mixing hydrazine hydrate, carbon disulfide and sodium hydroxide to produce a reaction medium containing a salt of 2,5-dimercapto-1,3,4-thiadiazole, followed by adding to the reaction medium a neutralizing component selected from a group containing strong organic or inorganic acids. According to the invention, prior to mixing, sodium hydroxide is cooled to a temperature of no more than 12℃. The hydrazine hydrate is added in an inert gas atmosphere during mixing. Mixing of hydrazine hydrate, carbon disulfide and sodium hydroxide is carried out in the molar ratio 1:2,2-2,4:1,55-1,95. The neutralizing component is a solution of sulfuric acid of 5-85%, or hydrochloric acid of 5-25%, or nitric acid of 5-85%, or acetic acid of 5-85%. Moreover, the reaction with the neutralizing component is carried out at a temperature of 10-60 ºC, and the substance obtained after mixing with the neutralizing component is filtered to obtain the finished product. n EFFECT: technical result is a new method for the preparation of 2,5-dimercapto-1,3,4-thiadiazole with a high yield, which can be used as a part of antifreezes, lubricating and cooling liquid, and in metalworking. n 2 cl, 12 ex, 1 dwg |
| priorityDate | 2020-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 43.