http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2022055926-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_91ec26f558fc6a38426bafb3d9a10e0c |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2103-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2301-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2103-346 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2001-5218 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-103 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-66 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-5236 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-5209 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-52 |
| filingDate | 2019-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8a7810884cfcdd032fea02ac29077933 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f14ef67ce13605c5ddbeb0a2da83fa1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7628d8f01a02398274867658dec67594 |
| publicationDate | 2022-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2022055926-A1 |
| titleOfInvention | Method for the precipitation of arsenic and heavy metals from acidic process water |
| abstract | The invention relates to a method for the precipitation of arsenic and heavy metals from acidic, in particular sulphuric acid, process water ( 12 ), containing both arsenic and heavy metals, comprising a precipitation method phase (II) with a sulphide precipitation stage (C) in which arsenic and at least one primary heavy metal are precipitated together, wherein a sulphide precipitating agent ( 16 ) is added to the process water ( 12 ) such that arsenic is precipitated as arsenic sulphide and the at least one primary heavy metal is precipitated as metal sulphide. The sulphide precipitation stage (C) comprises a first sulphide precipitation step (C. 1 ) in which a sulphide precipitating agent is added to the process water ( 12 ) in a first sulphide precipitation reactor ( 14 ), whereby an intermediate fluid ( 22 ) is generated still containing arsenic or still containing arsenic and the primary heavy metal. The intermediate fluid ( 22 ) is transferred into a second sulphide precipitation reactor ( 30 ) after the first sulphide precipitation step (C. 1 ). The sulphide precipitation stage (C) comprises a second sulphide precipitation step (C. 2 ) in which a sulphide precipitating agent is added to the intermediate fluid ( 22 ) in the second precipitation reactor, whereby a residual fluid ( 32 ) is generated which is substantially free from arsenic. |
| priorityDate | 2018-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.