http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105669496-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C273-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-70 |
| filingDate | 2016-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-105669496-B |
| titleOfInvention | A kind of preparation method of O Methyl Isourea Sulfates |
| abstract | It is that reaction is divided into two processes, first process is to add urea and dimethyl suflfate in reactor to mix, and then adds water and sulfuric acid carries out the reaction of first process the invention discloses a kind of preparation method of O Methyl Isourea Sulfates；Second process is that first process reaction liquid adds calcium hydroxide solid second process reaction of progress directly into reactor, and methanol is added after the completion of second process reaction and is recrystallized, product O Methyl Isourea Sulfates are filtrated to get.The overall yield of reaction of two processes is more than 80%, and product O Methyl Isourea Sulfates mass content is more than 98%.Course of reaction of the present invention is reacted for " quasi- one kettle way ", and technique is simple, raw material are easy to get, solvent load is few, easy to operate, high income.And it is less due to producing the three wastes as catalyst, in preparation process using calcium hydroxide, be conducive to environmental protection.The calcium sulfate of by-product can be used for manufacture of cement, and integrated cost is further reduced, and be adapted to industrialized production. |
| priorityDate | 2016-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.