Title:
METHOD AND SYSTEM FOR SELF-INDUCED SEPARATION OF FLUORINE AND CHLORINE
Document Type and Number:
WIPO Patent Application WO/2022/001231
Kind Code:
A1
Abstract:
A method for self-induced separation of fluorine and chlorine, comprising the following steps: 1) obtaining a saturated chlorine-containing solution: adding chlorine to fluorine-chlorine wastewater to increase the concentration of chloride ions in the fluorine-chlorine wastewater until the chloride ions are supersaturated, and crystalizing and precipitating all the fluoride ions and some chloride ions in the wastewater to obtain fluorine-chlorine mixture crystals, the liquid phase being the saturated chlorine-containing solution; 2) obtaining a chloride crystal salt: crystalizing the saturated chlorine-containing solution obtained in step 1) to obtain the chloride crystal salt; and 3) obtaining fluoride crystals by separation: dissolving the fluorine-chlorine mixture crystals obtained in step 1) to obtain a fluorine-chlorine mixed solution, and with multiple dissolutions and addition of fluoride, obtaining the fluoride crystals by means of separation. Also disclosed is a system for self-induced separation of fluorine and chlorine. The treatment method and system for separating fluorine and chlorine can reduce the use of auxiliary additives, and effectively and accurately separate fluorine elements from chlorine elements, thereby improving the disposal quality and purity of the fluorine-chlorine wastewater.
Inventors:
YANG BENTAO (CN)
WEI JINCHAO (CN)
YE HENGDI (CN)
LIAO JIYONG (CN)
LI JUNJIE (CN)
DAI BO (CN)
WEI JINCHAO (CN)
YE HENGDI (CN)
LIAO JIYONG (CN)
LI JUNJIE (CN)
DAI BO (CN)
Application Number:
PCT/CN2021/082916
Publication Date:
January 06, 2022
Filing Date:
March 25, 2021
Export Citation:
Assignee:
ZHONGYE CHANGTIAN INT ENG CO (CN)
International Classes:
C02F9/10; C01D3/02; C01D3/04; C01D3/14
Foreign References:
| CN111302525A | 2020-06-19 | |||
| CN106865573A | 2017-06-20 | |||
| CN108144576A | 2018-06-12 | |||
| CN110194557A | 2019-09-03 | |||
| US4094956A | 1978-06-13 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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