http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107286023-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-84 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-84 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-51 |
| filingDate | 2017-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2018-07-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2018-07-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107286023-B |
| titleOfInvention | A kind of purification process of m-phenylene diamine (MPD) |
| abstract | The present invention relates to m-phenylene diamine (MPD) production technical fields, particularly disclose a kind of purification process of m-phenylene diamine (MPD).The purification process of the m-phenylene diamine (MPD), it is characterized in that, the m-phenylene diamine (MPD) ash product melted in advance are continuously introduced into rectifying column rectifying, by partially liq through producing pipe extraction；The m-phenylene diamine (MPD) of extraction is directly injected into crystallizer, is heated to all into molten condition, decrease temperature crystalline cools down later, and mother liquor is released via crystallizer bleeder valve, is sent into next stage crystallizer and continues fusion-crystallization, operating process is same as above；The feed liquid obtained after multistage fusion-crystallization is collected, cooling in inert protective atmosphere, slice, the m-phenylene diamine (MPD) finished product after being purified.Impurity-diaminotoluene content is less than 50ppm in m-phenylene diamine (MPD) after the purified processing of the present invention, can meet the requirement of the high-purity applications such as aramid fiber 1313 synthesis, and scientific in principle improves the utilization rate of material, reduces separating energy consumption and equipment investment, green economy. |
| priorityDate | 2017-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.