Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for directly producing lithium hydroxide and lithium carbonate from high magnesium-lithium ratio salt lake brine

A technology of salt lake brine and high magnesium-to-lithium ratio, applied in the directions of lithium oxide;/hydroxide, lithium carbonate;/acid carbonate, boron oxyacid, etc., can solve the problem that battery-grade lithium carbonate is not widely Standard, loss of liquid lithium brine, inability to solve problems such as entrainment loss, etc., to achieve good operability and low cost

Active Publication Date: 2022-02-08
马培华
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Chinese patent application 201310571755.2 mentions the use of calcium chloride to reduce the concentration of sulfuric acid in boron-lithium brine to avoid the loss of lithium sulfate sedimentation, but this method cannot solve the entrainment loss caused by the settlement of huge amounts of bischofite in the salt pan, magnesium saturated brine The several times of concentration will definitely cause the complete loss of liquid lithium brine in the concentration pool due to the precipitation and entrainment of bischofite
Different battery material manufacturing requirements and manufacturing processes are different, resulting in no universal standard for battery grade lithium carbonate in China

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for directly producing lithium hydroxide and lithium carbonate from high magnesium-lithium ratio salt lake brine
  • Method for directly producing lithium hydroxide and lithium carbonate from high magnesium-lithium ratio salt lake brine
  • Method for directly producing lithium hydroxide and lithium carbonate from high magnesium-lithium ratio salt lake brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Salt lake crystal halogen in Uyuni in Polyvia as an example:

[0126] (1) Forming boronium halide

[0127] The salt lake crystal brine in Polyvian countries in the Polyvian countries was evaporated in salt field. During the evaporation process, the laminate (mainly the magnesium chloride solution) was used to make magnesium operation using the lamination of the lithium (mainly magnesium chloride solution). Forming a potassium halide, introducing a stabilizing cell for evaporation, forming a stable boronium halide. Focus on monitoring magnesium ions and sulfate concentrations. In order to save investment, the stabilization pool is used as the storage pool, according to the conditions such as the production plan and the environmental temperature, and the amount of potassium halide stabilizing components are carried out by adjusting the amount of potassium.

[0128] Grinding and evaporation stable after crystal brine

[0129] Uyuni Salt Lake (UYUNI) crystal brine composition: ...

Embodiment 2

[0153] Argentina Lincoln Salt Lake (Rincon) intergranular brine example:

[0154] (1) Acquisition crystal brine Argentina Salt Lake Lincoln, by evaporation, before the control bischoffite precipitate in large amounts, to obtain parts of lithium boron group brine. This brine can be further concentrated to a lithium ion concentration of 6.42g / L, the boron content of 4.65g / L. However, the lithium concentration process can cause a significant loss of bischoffite precipitated, while a large number of lithium sulfate sedimentation, generally over 30% lithium ion losses.

[0155] Salt Lake Lincoln (Rincon) parts intergranular brine groups:

[0156] Ingredient Li +

K +

NA +

Mg 2+

CA 2+

B 3+

SO 4 2-

Cl -

proportion g / L 0.40 7.51 115.95 3.42 0.49 0.33 12.52 188.43 1.204

[0157] Salt Lake Lincoln (Rincon) further brine and concentrated Group parts:

[0158] Ingredient Li +

K +

NA +

Mg 2+

CA 2+

B ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for directly producing lithium hydroxide and lithium carbonate from salt lake brine with a high magnesium-lithium ratio, comprising the following process steps: (1) further stabilizing the brine after potassium extraction in the salt field to form low-potassium sodium in a stabilization pool Boron-lithium brine; (2) Boron-lithium brine forms boric acid products and lithium brine after boron extraction; (3)~(5) Lithium brine is refined three times to obtain three times refined liquid; (6) Three times refined liquid passes through bipolar membrane Electrodialyzer forms lithium hydroxide solution; (7) pass lithium hydroxide solution through evaporative crystallizer to obtain monohydrate lithium hydroxide solid and evaporation mother liquor; (8) form described monohydrate lithium hydroxide solid by washing recrystallization Battery-grade lithium hydroxide and washing solution; (9) reacting evaporated mother liquor and washing solution with carbon dioxide gas through a gas-liquid reactor to form lithium carbonate. The invention has good operability and greatly improves the recovery rate of lithium ions.

Description

Technical field [0001] The present invention belongs to the field of inorganic chemicals, in particular, the present invention relates to a method of lithium hydroxide and lithium carbonate to take a high ratio of Mg-Li prepared directly from salt lake brine. Background technique [0002] Lithium metal is the most important source of energy, it is also an integral part of modern industry strategic resources, play an important role in cell chemistry, glass, ceramics, metal aviation, nuclear industry, Lubricants and refrigerants aspects. Especially in recent years the development of lithium battery explosion, resulting in global consumption of lithium in rapid expansion. Global production capacity 80% of the lithium salt lake, and easy to develop a lithium salt lake are lower than the full magnesium extraction, rapidly growing demand for lithium battery grade lithium carbonate urgent need to extract lithium from the high ratio of magnesium salt lake, the battery industry to meet th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01D15/08C01D15/02C01B35/10
CPCC01B35/1045C01D15/02C01D15/08
Inventor 马培华
Owner 马培华