http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021088285-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a767f4998e53684ec68f4fdfbb8e4de7 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-409 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D15-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B7-005 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B26-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B26-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B35-1045 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B35-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D15-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B26-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B26-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-40 |
| filingDate | 2020-03-13^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8abe2c7b64a0a899232eaca6bd664d4d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c754df434c0aabf55edb297006109802 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_661d60e45fc69e9c03b429a18d5a783f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9c2cd0bf2e72a7c6f1d7b237ddffaef6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8c2946fbcac6f2a8a3b9372d654c4eb4 |
| publicationDate | 2021-05-14^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2021088285-A1 |
| titleOfInvention | Extraction system and extraction method for extracting lithium and boron by separating calcium from calcium-containing brine with secondary amide/alkyl alcohol composite solvent, and use of extraction method |
| abstract | Disclosed are an extraction system and extraction method for extracting lithium and boron by separating calcium from a calcium-containing brine with a secondary amide/alkyl alcohol composite solvent and the use of the extraction method. In the extraction system, a secondary amide and an alkyl alcohol are contained and used as extractants for extracting lithium and boron, respectively, and composed of a single compound or a mixture of two or more compounds. The total number of carbon atoms in the molecules is 12-18 and 8-20, respectively. The freezing point of the extraction system is less than 0ºC. A single-stage or multi-stage countercurrent extraction is conducted under the conditions that the volume ratio of an organic phase to a brine phase is 1-10 : 1, the density of the brine is 1.30 to 1.56 g/cm3, the pH value of the brine is 0 to 7 and the temperature is 0 to 50℃, an aqueous phase with a low calcium-lithium ratio is obtained through back extraction, and lithium chloride, lithium carbonate, lithium hydroxide and boric acid are respectively obtained through concentration, impurity removal and preparation. The secondary amide of the present invention has a simple molecular structure, and the composite solvent improved by an alkyl alcohol can extract lithium and boron simultaneously. The multi-stage extraction rate is high, the back extraction is carried out with water, and the acid and alkali consumption is greatly reduced. The extraction separation flow is shortened, and the extraction system has little solution loss and is suitable for development of oilfield brine. |
| priorityDate | 2019-11-08^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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