Technology for preparing high-purity anhydrous lithium chloride through centrifugal extraction of salt lake brine

A technology of salt lake brine and centrifugal extractor, which is applied in the field of comprehensive utilization of salt lake resources, can solve the problems of large area of ​​extraction tank, large amount of organic phase entrainment, small processing capacity of material and liquid, etc., and achieves fast phase equilibrium establishment time and solvent demand. The effect of small amount and low solvent consumption

CN106337138AInactive Publication Date: 2017-01-18深圳市捷鑫资产管理有限公司
7 Cites 20 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-01-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a technology for preparing high-purity anhydrous lithium chloride through centrifugal extraction of salt lake brine. The technology solves the technical problem that in the prior art, the preparing purity is poor and comprises the steps of impurity removal, hydrochloric acid blending, multistage counterflow centrifugal extraction, multistage counterflow washing, multistage counterflow reverse extraction, saponification, iron removal, oil removal, final evaporation and concentration, crystallization, separation, drying, packaging and obtaining 99.995% high-purity sewage lithium chloride products. Compared with the prior art, the technology has the beneficial effects that before lithium extraction, the saponification working procedure is set, an extraction organic phase containing amide complexing extractants is regenerated, and a frequency converter closed-loop flow control system is introduced for precisely controlling the flow; the backflow of the stage is adopted for solving the problem that the contact face is small due to large-phase-ratio feeding; a centrifugal extraction machine is arranged, the technology is automatically switched, and continuity and reliability of production can be ensured.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of comprehensive utilization of salt lake resources, in particular to a process for preparing high-purity anhydrous lithium chloride by centrifugal extraction of salt lake brine. Background technique

[0002] Lithium has been hailed as "the energy metal that drives the world's progress". Because of its unique physical and chemical properties, it is a strategic resource of great significance in national economy and national defense construction. In nature, lithium resources mainly occur in solid ore and liquid brine. Lithium salt production in my country has always been dominated by lithium-containing ores such as spodumene and lepidolite. With the increasing depletion of solid lithium ore resources, lithium extraction from salt lake brine has attracted more and more attention from relevant departments. Due to the abundant lithium resources in salt lake brine, salt lake brine has gradually become the most important ...

Examples

Embodiment Construction

[0039] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] like figure 1 As shown, it is a process for preparing high-purity anhydrous lithium chloride by centrifugal extraction of salt lake brine, which specifically includes the following steps:

[0041] S1. Material pretreatment: pretreat the brine to remove boric acid, solid impurities and suspended matter in the brine;

[0042] S2. Material blending: Add industrial hydrochloric acid with a concentration of 31% to the pretreated brine, mix and stir for acid adjustment treatment, so that the pH of the brine=2-3;

[0043] S3. Multistage countercurrent centrifugal extraction: ...