http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104844474-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-39 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-34 |
| filingDate | 2015-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-104844474-B |
| titleOfInvention | Method and device for recycling cyhalothrin and solvent thereof from cyhalothrin centrifugal mother liquid |
| abstract | The invention discloses a method and a device for recycling cyhalothrin and a solvent thereof from a cyhalothrin centrifugal mother liquid. The method comprises the following steps: continuously introducing the cyhalothrin centrifugal mother liquid into a preheater, and introducing the pre-heated cyhalothrin centrifugal mother liquid into a scraper type falling-film evaporator; continuously introducing gas-phase materials on the top of the evaporator into the middle part of a rectifying column after trapping foams through a gas-liquid separator; extracting a finished product isopropanol on the column bottom side line of the rectifying column, and introducing column bottom heavy components into the evaporator; introducing bottom materials of the evaporator into a receiving tank, pumping the bottom materials into a refining kettle to perform extraction operation after ramming, separating out the lower-layer water-containing isopropanol mother liquid, and introducing an upper-layer solvent into a distillation still; distilling a crude product, performing a refining process on recycled solvent oil, and introducing recycled crude oil into a crystallization kettle; cooling the crystallization kettle to separate out cyhalothrin crystals, introducing the cyhalothrin crystals into a centrifugal machine to filer to obtain cyhalothrin raw powder, and putting in storage; and introducing the centrifugal mother liquid into the pre-heater, and introducing centrifugal washing liquor into the refining kettle or the crystallization kettle. The method is simple, high in efficiency and low in energy consumption and is suitable for industrial production, and the utilzition rate of the cyhalothrin production mother liquid is improved. |
| priorityDate | 2015-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.