http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102731453-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-86 |
| filingDate | 2012-07-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2015-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102731453-B |
| titleOfInvention | A kind of production control method of 98% content carbofuran |
| abstract | A kind of 98% content carbofuran production control method, adopt 1,2-ethylene dichloride or 1,2-propylene dichloride is reaction, recrystallisation solvent, solvent load is 2 ~ 4 times of benzofuranol quality, and the mol ratio of benzofuranol and methyl isocyanate, triethylamine is 1:1.05:0.01, drips methyl isocyanate under reflux temperature, cooling, crystallization, filtration are finished in reaction, and filtration cakes torrefaction obtains mass content 98.0 ~ 98.9% major product; Filtrate isolates 10 ~ 15% of quality at every turn, uses after supplementing the novel solvent merging of equal quality as lower batch reaction mother liquor simultaneously; Each isolated filtrate distillation, recovered solvent does fresh solvent and uses, and obtain the carbofuran byproduct of mass content 84.1 ~ 92.7%, total recovery is 99.0 ~ 99.8% (in benzofuranols) simultaneously.The present invention can avoid recrystallization operation, and major product carbofuran mass content Absorbable organic halogens controls 98.0% ~ 98.9%, and solvent recuperation amount is little; The carbofuran product of by-product mass content 84.1 ~ 92.7%, as 3% carbofuran granule raw material. |
| priorityDate | 2012-07-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.