http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2019002046-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6bd0cdbc5c67cf4957ed83c89140748e |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B15-00 |
| filingDate | 2017-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e728e63189f88aa4dc3ffd7f9183447 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ac580255cda0c978a031772e211650ad |
| publicationDate | 2019-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2019002046-A |
| titleOfInvention | Waste acid treatment method |
| abstract | PROBLEM TO BE SOLVED: To provide a waste acid treatment method capable of separating and recovering heavy metals other than Cu contained in waste acid and reducing the amount of sulfurized starch repeated in the smelting process. SOLUTION: After a sulfurizing agent is added to a waste acid containing heavy metals and sulfuric acid generated during treatment of copper smelting exhaust gas to sulfidize the heavy metals, the resulting slurry is mixed with a first sulfide starch and a first clarification. A first sulfurization step that separates the liquid into solid and liquid, and a calcium-based neutralizer is added to the first clarified liquid to form gypsum, and then the slurry containing the gypsum is separated into gypsum and gypsum final liquid. A gypsum production process to be performed, and a sulfurizing agent is added to the gypsum final liquid to sulfidize the remaining heavy metal, and then the resulting slurry is subjected to solid-liquid separation into a second sulfurized starch and a second clarified liquid. And a sulfurization reaction is performed at a redox potential of 150 to 170 mV (based on silver-silver chloride electrode) in the first sulfurization step by adjusting the amount of the sulfurizing agent added in the first sulfurization step. [Selection] Figure 1 |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2019135036-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-7073759-B2 |
| priorityDate | 2017-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.