http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102702088-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be2f7c40a40ca5964d35f731f619d0e3 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-64 |
| filingDate | 2012-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_117667c8db7eb8d6b5cafb81d5c580fd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f03c67c0d355e5d7e93e364de0640dce http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cd7d17851fffa0944ab672fcece65bfb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_75a1e0f56c691159ab68da1475ad06a5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_57d5d3feda708c68a690110f2f0763ad |
| publicationDate | 2013-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102702088-B |
| titleOfInvention | Method for preparing 3,5,6-trichloropyridine-2-ol sodium |
| abstract | The invention discloses a method for preparing 3,5,6-trichloropyridine-2-ol sodium. The method comprises the following steps of: performing reflux reaction on trichloroacetyl chloride and acrylonitrile in an inert organic solvent in the presence of a catalyst copper or cuprous salt, extracting a front cut fraction, cooling a reaction solution, dripping alcohol, and performing cyclization reaction; performing suction filtering, cooling filtrate, dripping a sodium hydroxide solution, performing aromatization reaction, cooling, and performing suction filtering to obtain a crude product; and refining the crude product to obtain a product. HCl is generated by dripping a compound containing active hydroxyl, so that equipment is prevented from being corroded and human bodies are prevented from being hurt by the HCl introduced in a stepwise method; by extracting the front cut fraction during addition reflux, the influence of the HCl on addition can be eliminated, and the amount of a byproduct tetrachloropyridine is only 10 to 15 percent that in a one-pot method; and the reaction period is greatly shortened, and the yield of the product is 75 molar percent. |
| priorityDate | 2012-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.