http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103342650-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-52 |
| filingDate | 2013-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-10-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2014-10-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103342650-B |
| titleOfInvention | Method for continuously producing 3,4-dichloroaniline |
| abstract | The invention relates to a method for continuously producing 3,4-dichloroaniline. The method comprises the following steps of: continuously putting a 3,4-dichloronitrobenzene solution into a stirred tank reactor, wherein the pressure of the stirred tank reactor is 0.5-2Mpa, the temperature is 60-120 DEG C, and the pH value in a stirred tank is controlled to be between 8 and 12; performing catalytic hydrogenation reaction on the 3,4-dichloronitrobenzene in the stirred tank reactor in the presence of a nickel catalyst, a dechlorination inhibitor, hydrogen and a solvent to generate 3,4-dichloroaniline; overflowing the reaction product into a tilted plate separator, and continuously separating a catalyst concentrated solution and a product clear solution in the tilted plate separator; and continuously returning the catalyst concentrated solution to the stirred tank reactor. According to the method, the yield of the product obtained by the method is more than 99%, the dechlorination mass fraction is less than 0.5%, the loss of the catalyst is low, the consumption of the hydrogen is small, and the operation is stable and easy to control, so that the method is suitable for industrial large-scale production. |
| priorityDate | 2013-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 55.