http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107188219-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G9-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G9-06 |
| filingDate | 2017-05-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2019-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2019-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107188219-B |
| titleOfInvention | A kind of method for recovering silver sulfate from CODCr determination waste liquid |
| abstract | A method for recovering silver sulfate from waste liquid of COD Cr measurement relates to the technical field of recovery and reuse of precious metal silver in waste liquid of COD measurement. Take the waste liquid for CODCr measurement, add a few drops of potassium dichromate, let it stand, and filter; add sodium chloride to the waste liquid, cover the mouth of the container, and let it stand overnight; gently pour off the supernatant, and the remaining part contains precipitate centrifugation of the solution; take an appropriate amount of distilled water and add it to the precipitate, fully stir and wash, centrifuge, and then use distilled water to wash and centrifuge once again; dry to obtain silver chloride; weigh the silver chloride precipitate, add concentrated sulfuric acid, and heat it in an electric furnace until the precipitate dissolves, Then cool; add absolute ethanol to the silver sulfate mixture, put it in a dark place to stand, centrifuge and add absolute ethanol again to wash, centrifuge and dry. The invention adopts the NaCl - H2SO4 -ethanol method to recover CODCr to measure the silver sulfate in the waste liquid, the recovery rate reaches 95.14%, and the purity reaches 96.71%. |
| priorityDate | 2017-05-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.