http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109110786-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-03 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D7-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D7-22 |
| filingDate | 2017-06-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109110786-B |
| titleOfInvention | Method for removing trace calcium in sodium carbonate refining |
| abstract | The invention discloses a method for removing trace calcium in sodium carbonate refining, which comprises the following steps: (1) putting raw material sodium carbonate solution into a crystallization moduleMixing the calcium carbonate with a refining agent to generate suspension containing calcium carbonate crystals; the refining agent is a solution containing calcium ions; (2) and (2) sending the suspension containing the calcium carbonate crystals in the step (1) to an ultrafiltration membrane module through a pipeline to obtain a concentrated solution and a purified solution. The invention can be used for dissolving Ca in the raw material sodium carbonate 2+ The content of the sodium carbonate is reduced to be less than 5ppm, the guarantee is provided for improving the quality of subsequent industrial products, the selectable range of the market of the raw material sodium carbonate can be greatly widened, the raw material source is convenient, the equipment structure is simple, the operation is convenient, the investment cost is lower, and the method has good industrial application prospect. |
| priorityDate | 2017-06-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 39.