http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112169562-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2251-304 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2251-604 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2257-204 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B35-126 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F11-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D53-96 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B35-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F11-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D53-96 |
| filingDate | 2020-10-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112169562-B |
| titleOfInvention | A kind of treatment method of boron trifluoride tail gas |
| abstract | The invention discloses a method for treating boron trifluoride tail gas, comprising the following steps: (1) absorbing the boron trifluoride tail gas with excess sodium hydroxide solution to generate a mixed solution containing sodium fluoride and sodium metaborate (2) mixed solution and calcium hydroxide emulsion are mixed and react, generate calcium fluoride precipitation, obtain the first mother liquor containing calcium fluoride; (3) first mother liquor is centrifuged to obtain the first pair of The product calcium fluoride and the first clear liquid; (4) the first clear liquid is heated to 40～65 ℃, reacts while stirring, generates calcium metaborate precipitation, obtains the second mother liquor containing calcium metaborate; (5) will The second mother liquor is centrifuged to obtain the second by-product calcium metaborate. In the present invention, NaOH solution is used for lye absorption first, and then Ca(OH) 2 is used for segmental treatment to obtain by-products calcium fluoride and calcium metaborate. While efficiently treating boron trifluoride in the tail gas, no generation of Any fluorinated wastewater. |
| priorityDate | 2020-10-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.