http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101381325-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d6a6f422b091ba12ea61d4adbf1b0e8e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C233-11 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-04 |
| filingDate | 2008-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_de998ee7f31b04bf03ce266f56e15b82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2cb5476c5e4b167883e874cbc882337b |
| publicationDate | 2013-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-101381325-B |
| titleOfInvention | Method for simultaneously preparing phenylacetamide and phenylacetic acid by benzyl cyanide hydrolysis in ammonia-containing high temperature aqueous water medium |
| abstract | The invention discloses a method for hydrolyzing phenylacetonitrile in an ammonia-containing high-temperature liquid water medium and preparing phenyl acetamide and phenylacetic acid simultaneously. The method comprises the following steps: 1) deionized water and the phenylacetonitrile with the mass ratio of between 2 to 1 and 8 to 1 are added into a high-pressure reaction kettle, are stirred, and are heated to boil, and an exhaust valve is opened for 2 to 5 minutes; 2) 25 percent ammonia water is pumped through a metering pump to ensure that the ammonia concentration in reactants in the kettle is between 0.05 and 4g/L, and the temperature is increased to be between 180 and 250 DEG C to hydrolyze for 5 to 120 minutes; 3) the temperature is reduced to recover ammonia gas in the kettle; 4) a hydrolysate is cooled, the pH value of the hydrolysate is adjusted to between 8 and 9 , and the hydrolysate is crystallized, and filtered to obtain crude phenyl acetamide; 5) the crude phenyl acetamide is subjected to decolorization by activated carbon, secondary crystallization and vacuum drying to obtain a phenyl acetamide product; and 6) the pH value of filtrate in step 4) is adjusted to between 3 and 4, and the filtrate is crystallized to obtain crude phenylacetic acid, and then the crude phenylacetic acid is subjected to decolorization by the activated carbon, secondary crystallization and vacuum drying to obtain a phenylacetic acid product. The method has a simple and environment-friendly technical process. |
| priorityDate | 2008-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.