http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110002476-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2311-2642 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2311-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2311-263 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2311-2673 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D2009-0086 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-445 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F7-785 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D15-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-0022 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-026 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-025 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-027 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D15-02 |
| filingDate | 2019-04-12^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-05-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-05-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110002476-B |
| titleOfInvention | Preparation method of lithium hydroxide |
| abstract | The invention discloses a preparation method of lithium hydroxide, which comprises the following steps: A. coprecipitating the lithium extraction mother liquor of the salt lake brine by using an aluminum salt solution and a sodium hydroxide solution, performing solid-liquid separation after aging, washing and drying to obtain lithium aluminum hydrotalcite; B. acidifying the lithium aluminum hydrotalcite to obtain a lithium aluminum acid solution; C. carrying out nanofiltration aluminum lithium separation and reverse osmosis primary concentration on the lithium aluminum acid solution in sequence to obtain a primary concentrated lithium-rich solution; D. deeply removing aluminum from the lithium-rich solution to obtain aluminum-removed lithium-rich solution; E. carrying out bipolar membrane electrodialysis on the aluminum-removed lithium-enriched liquid to obtain a secondary concentrated lithium-enriched liquid; F. and evaporating and concentrating the secondary concentrated lithium-rich liquid to obtain the lithium hydroxide. The preparation method comprises the steps of firstly preparing lithium aluminum hydrotalcite by using lithium carbonate-containing salt lake brine lithium extraction mother liquor as a raw material, transferring lithium ions into an aqueous solution by an acidification method, separating the lithium ions from impurity ions, removing aluminum, and performing bipolar membrane electrodialysis concentration to obtain lithium hydroxide, so that lithium resources are fully utilized, and the resource utilization rate is improved. |
| priorityDate | 2019-04-12^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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