http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2019063781-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6bd0cdbc5c67cf4957ed83c89140748e |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G11-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-20 |
| filingDate | 2017-10-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ac580255cda0c978a031772e211650ad http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a575be075802effac5e8aa1193a15774 |
| publicationDate | 2019-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2019063781-A |
| titleOfInvention | Treatment method of waste acid generated in copper smelting |
| abstract | PROBLEM TO BE SOLVED: To provide a method for treating waste acid capable of reducing the amount of cadmium to be repeated in the smelting process and reducing the carried-in water amount to suppress the drying cost. SOLUTION: A first sulfiding step of solid-liquid separation into a first sulfide residue and a first clear liquid after a sulfiding agent is added to a waste acid containing a heavy metal and a sulfuric acid component to sulfidize the heavy metal; A calcium-based neutralizing agent is added to the first clear liquid to form gypsum from the sulfuric acid, and then a gypsum manufacturing process for solid-liquid separation into gypsum and gypsum final solution, and a sulfurizing agent is added to the gypsum final solution The method further comprises a second sulfurizing step of solidifying solid-liquid separation into a second sulfide precipitate containing cadmium and a second clear liquid after sulfurizing the remaining heavy metal, wherein the cadmium sulfide grade of the second sulfide precipitate is 40% by mass If the cadmium content of the second sulfide precipitate is more than 50% by mass, the addition amount of the sulfiding agent is decreased in the second sulfiding step. . [Selected figure] Figure 1 |
| priorityDate | 2017-10-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.