http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107265690-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-103 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-5236 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F101-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F9-04 |
| filingDate | 2017-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107265690-B |
| titleOfInvention | Method for treating high-arsenic waste acid |
| abstract | The invention provides a method for treating high-arsenic waste acid, which comprises the following steps: 1) adding a calcium compound into the high-arsenic waste acid until the pH value is 3-6, then adding an oxidant and a soluble ferric salt for reaction until no precipitate is generated continuously, and carrying out solid-liquid separation to obtain a first precipitate and an intermediate liquid product; 2) adding a calcium compound into the intermediate liquid product for reaction, controlling the pH value to be 7-9 until no precipitate is generated continuously, and then carrying out solid-liquid separation to obtain a second precipitate and waste liquid; the calcium compound is at least one selected from calcium hydroxide and calcium oxide. By adopting the treatment method, the obtained waste liquid and waste residue can simultaneously reach the discharge standard. |
| priorityDate | 2017-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.