http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H0517160-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_57f9a14febad00de998ac51984a30a60 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23G1-36 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B7-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G49-14 |
| filingDate | 1991-07-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f3c7316ca40f3d0c0204032c2f26c19 |
| publicationDate | 1993-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H0517160-A |
| titleOfInvention | Recovery method of hydrochloric acid and iron sulfate from ferrous chloride waste liquid |
| abstract | (57) [Summary] [Objective] By separating and recovering useful hydrochloric acid and iron sulfate from the waste liquid discharged from the etching process, etc., efficient resource reuse is achieved and waste is recycled. Provided is a method for recovering hydrochloric acid and iron sulfate forming a circulation system. [Structure] Iron was added to the hydrochloric acid-containing copper waste liquid to separate it into copper and ferrous chloride waste liquid, and concentrated sulfuric acid was added to this ferrous chloride waste liquid and mixed, and this mixed liquid was crystallized to form a liquid phase. The solid phase is separated, the mixture of hydrochloric acid and sulfuric acid in the liquid phase is recovered, and the solid phase is crystallized to take out iron sulfate heptahydrate. This is purified to recover iron sulfate crystals. Next, the recovered hydrogen chloride and hydrochloric acid are Distill to obtain hydrochloric acid with a concentration of 35% or more. Further, sulfuric acid is added to the bottom liquid as an azeotropic agent to take out hydrochloric acid having a concentration of 35% or more. After the sulfuric acid is concentrated, it is recycled again as an azeotropic agent. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2007508226-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100440469-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20040008968-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1522522-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103553256-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4745235-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2005040436-A1 |
| priorityDate | 1991-07-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.