http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113354568-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c602e20d9b57f10211f9dc7b55ede330 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-267 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-267 |
| filingDate | 2021-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d452bde8d912452c63d8fecb615b5d8b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3b9de75ac9241daacd7231c578dc68a3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f1a94bc2cb392222f7d036ab0975af05 |
| publicationDate | 2021-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113354568-A |
| titleOfInvention | Method for ultimate water removal of electronic-grade N-methyl pyrrolidone |
| abstract | The invention relates to the technical field of methyl pyrrolidone water removal, and discloses a method for removing water of electronic grade nitrogen methyl pyrrolidone in a limiting way, which comprises the following steps: s1, building a reduced pressure distillation device in the glove box; s2, adding p-methylbenzoic acid, phosphorus pentoxide and electronic grade N-methyl pyrrolidone into a distillation device, stirring and heating to start decompression, wherein the color of the N-methyl pyrrolidone solution is changed from initial clarification to turbidity, then to orange red and wine red; s3, starting distillation, wherein the former part of distillate is not needed, and collecting middle distillate; the electronic grade N-methyl pyrrolidone is further purified by combining physical and chemical modes, phosphorus pentoxide is used as a water removal agent, the electronic grade N-methyl pyrrolidone is further purified by distillation in an anhydrous environment, and moisture detection is carried out on the electronic grade N-methyl pyrrolidone, a front distillate and a rear distillate by a Karl Fischer moisture tester. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112094216-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112094216-A |
| priorityDate | 2021-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.