Co-extraction method of boron and lithium in brine

An extraction and brine technology, which is applied in the field of co-extraction and recycling of boron and lithium, can solve the problems of difficulty in effective phase separation between three liquid phases, cumbersome procedures, etc. cost effect

Active Publication Date: 2018-07-31
TIANJIN UNIV OF SCI & TECH
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Problems solved by technology

It is worth noting that since this method forms a three-liquid phase system, it is difficult to effectively separate the three liquid phases in the industrial production process.
In addition, since a small amount of boron will enter the middle phase of the polymer, and a small amount of lithium will enter the organic upper phase, the effective separation between boron and lithium cannot be fully realized, and subsequent analysis of the boron and lithium in the upper phase, and the middle phase, respectively, is required. The boron and lithium in the phase are extracted, so the process is cumbersome

Method used

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  • Co-extraction method of boron and lithium in brine

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Embodiment Construction

[0037] The following combined with the attachment and the specific embodiments further explained the present invention.

[0038] by figure 1 The craftsmanship shows boron -containing and lithium brine for boron and lithium to extract, and the brine team becomes Li + , NA + K + , CA 2+ , Mg 2+ CL - B 2 O 3 The content is 1.05, 63.52, 53.87, 4.38, 23.42, 226.35g / L.

[0039] Adjust the above brine pH 2.5, and then add FeCL 3 · 6H 2 O dissolved, gained brine containing boron, lithium, Fe (III), FE added 3+ LI in brine + The Moore is N (Fe / Li) ≈0.5.

[0040] Add FeCL 3 · 6H 2 O dissolution, obtain the co -oily phase of the load Fe (III), the added Fe 3+ LI in brine + Moorebi is n (Fe / Li) ≈ 1.5. Compared with O / A is 1: 1, the oil after the load FE (III) is relatively acidified and added after the FE (III) brine for five -level reverse streaming. Oil phase and post -extracting brine. Under this condition, the extraction rates of lithium and boron are 95.82 % and 99.68 %, respectively.

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Abstract

The invention discloses a co-extraction method of boron and lithium in brine; and a mixing extraction system is adopted to synchronously extract boron and lithium in the brine to realize separation ofboron and lithium from a brine basal body. Lithium and boron in an organic phase are reversely extracted by adopting acid solution and alkali solution to realize separation of boron and lithium. Lithium-contained reverse extracting liquid is condensed for cooling crystallization to prepare lithium chloride or precipitation to prepare lithium carbonate, and is directly condensed for crystallization to prepare boron sand or is acidified for concentration crystallization to prepare boric acid. The method only relates to conventional separation and enrichment operations, is simple in process andclosed in circulation, and realizes efficient recovery of boron and lithium. In addition, as boron and lithium are synchronously extracted, on the basis of simplifying operations and process steps, the problems of low extraction rate, weak organic phase stability and the like caused by mutual interference between boron extraction and lithium extraction organic phases in step-by-step boron and lithium extraction are solved.

Description

Technical field [0001] The present invention is a comprehensive utilization field of brine resources, especially in a boron brine, salt lake brine, oil field water and other boron and lithium -lithium -containing boron and lithium. Background technique [0002] my country has rich lithium underground brine, salt lake brine, oil and gas field water and other brine. The comprehensive recycling and utilization of related resources such as lithium in brine can not only bring considerable economic benefits, but also has great significance to the development of related industries. It is worth noting that brine usually contains a certain amount of boron. Because boron is easy to form a low -soluble lubine or boric acid, it has a serious impact on the comprehensive utilization process or product quality of brine resources. At the same time, if the rich boron resources are not recycled, it will not only bring economic losses, but also cause problems such as environmental pollution. In vie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/12C22B3/40C01B35/10C01B35/12
CPCC01B35/1081C01B35/124C22B26/12C22B3/409Y02P10/20
Inventor 余晓平邓天龙范学兵王欢郭亚飞王宁军唐兵贾晓华张思思
Owner TIANJIN UNIV OF SCI & TECH
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