http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112408421-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-129 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01C1-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01C1-22 |
| filingDate | 2020-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-04-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-04-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112408421-B |
| titleOfInvention | Method for preparing high-purity ammonium sulfite by using ammonia desulfurization wastewater |
| abstract | The invention discloses a method for preparing high-purity ammonium sulfite by using ammonia desulfurization wastewaterThe method sequentially separates insoluble impurities such as suspended matters, precipitates and the like in the wastewater, and then realizes the separation of soluble impurities such as F by adding soluble ferrous salt ‑ 、Cl ‑ 、NO 3 ‑ 、Fe 3+ 、Cu 2+ 、Hg 2+ 、Pb 2+ 、Na + 、K + And the like, and simultaneously, the steps of heat treatment, washing absorption, crystallization drying and the like are added to generate and further improve the purity of the ammonium sulfite product, the process flow is simple, the resource recovery and utilization rate is high, the method enables the purity of the ammonium sulfite obtained by recycling the ammonia desulphurization wastewater to reach more than 99 percent, and the method has great benefit on the application of the ammonium sulfite. The method also greatly reduces the discharge of the ammonia desulphurization wastewater, realizes the secondary innovative utilization of waste resources with low cost, reduces the environmental pollution and improves the social and economic benefits. |
| priorityDate | 2020-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.