http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113548983-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_509dcdee307c173971b32910685d906e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-04 |
| filingDate | 2020-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45b9e8abc2f500c65f292bd023883d80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df9847013bcbac5b9ae2dec046b2b71f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6a15adbd0b032f19ad47f9c69460695c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3ff8fe86566b9f4658a7090fbe51a98f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f40e56371d83cb2bcaebfa35135c7ce6 |
| publicationDate | 2021-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113548983-A |
| titleOfInvention | Preparation method of methyl isocyanate |
| abstract | The invention discloses a preparation method of methyl isocyanate, which comprises the following steps: under the protection of nitrogen, dissolving methylamine hydrochloride and triphosgene in an organic solvent, stirring and cooling, dropwise adding an organic alkali solution, keeping the temperature for reaction after dropwise adding, distilling at normal pressure after reaction, controlling the top temperature, and collecting fractions to obtain methyl isocyanate. The method avoids using phosgene in the traditional process, adopts triphosgene to react with methylamine, has higher safety, is beneficial to the protection of operators, is convenient to operate, is not limited in a laboratory, does not need special pressure-resistant and high-temperature-resistant equipment, has the capacity of reaching the hundred kilogram level, and is suitable for fine chemical enterprises such as pharmaceutical enterprises. |
| priorityDate | 2020-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 56.