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

Production method of lithium terachloroaluminate

A technology of lithium tetrachloroaluminate and production method, which is applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, etc., can solve the problems of large influence of water synthesis reaction and low yield, etc.

Active Publication Date: 2010-08-18
BYD CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Beneficial effects of the present invention: better solve the problem of moisture on LiAlCl 4 The synthesis reaction has a great influence, which leads to the problem of low yield. LiAlCl 4 The yield is increased by 10-20%, reaching more than 95%

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
  • Production method of lithium terachloroaluminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Follow the steps below to prepare LiAlCl 4 :

[0017] 1. Thoroughly dry the oven so that the dew point at 25°C is below 50PPM.

[0018] 2. Drying of raw materials: according to the molar ratio of anhydrous LiCl: anhydrous AlCl 3 = 1:1 weigh 42.5 grams of anhydrous LiCl, anhydrous AlCl 3 133.5 grams. Anhydrous Al 2 o 3 Additive composition is 100% Al 2 o 3 , weigh anhydrous Al 2 o 3 7.5 grams. 42.5 g of anhydrous LiCl and 7.5 g of anhydrous Al 2 o 3 Dry in an oven at 150°C for 3 hours.

[0019] 3. Anhydrous AlCl 3 Purification: 133.5 grams of anhydrous AlCl 3 Seal it into a clean and dry large test tube, and carry out sublimation at different temperatures in an oven. First, start from room temperature at a rate of 20°C / h to 45°C for 30 minutes at a constant temperature, then at 40°C / h to 85°C for 2 hours, and the sublimation of aluminum trichloride is complete. When the oven temperature drops to 45°C, take out the sublimated large test tube from the oven,...

Embodiment 2

[0022] Follow the steps below to prepare LiAlCl 4 :

[0023] 1. Thoroughly dry the oven so that the dew point at 25°C is below 50PPM.

[0024] 2. Drying of raw materials: according to the molar ratio of anhydrous LiCl: anhydrous AlCl 3 =1:1.2 Weigh 42.5 grams of anhydrous LiCl, anhydrous AlCl 3 160.5 grams. Weigh anhydrous Al 2 o 3 Additive 7.5 g, the anhydrous Al 2 o 3 The composition of the additive is based on the total weight of the additive, 90wt% Al 2 o 3 , 10wt% Al powder. 42.5 g of anhydrous LiCl and 7.5 g of anhydrous Al 2 o 3 Additives were dried in an oven at 150°C for 3 hours.

[0025] 3. Anhydrous AlCl 3 Purification: 160.5 grams of anhydrous AlCl 3 Seal it into a clean and dry large test tube, and carry out sublimation at different temperatures in an oven. First, start from room temperature at a rate of 20°C / h to 45°C for 30 minutes at a constant temperature, then at 40°C / h to 85°C for 2 hours, and the sublimation of aluminum trichloride is complet...

Embodiment 3

[0028] According to the method of embodiment 1, the difference is anhydrous Al 2 o 3 The composition of the additive is based on the total weight of the additive, 90wt% Al 2 o 3 , 5wt% Al powder, 5wt% Al(OH) 3 powder; the ratio of the amount of substance to anhydrous LiCl: anhydrous AlCl 3 =1:0.8, anhydrous Al 2 o 3 Additive 8.0 g. Yield 99.5%.

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

No PUM Login to View More

Abstract

The invention provides a production method of lithium terachloroaluminate, which comprises the following steps: placing anhydrous lithium chloride and anhydrous aluminium trichloride with basically equimolar ratio into a dry reaction vessel, adding an anhydrous aluminium oxide additive, controlling the reaction temperature to enable the anhydrous aluminium trichloride to be molten, wherein the anhydrous lithium chloride and the anhydrous aluminium oxide additive are not molten, thereby generating a solid-liquid two-phase reaction until a suspension in a reaction system is changed into a clear and transparent solution, and finishing the reaction; the anhydrous aluminium oxide additive comprises the following components calculated by the gross weight of the anhydrous aluminium oxide additive: 80 to 100 wt% of aluminium oxide and 0 to 20wt% of aluminium and / or aluminium hydroxide. According to the production method of the invention, the problem of lower yield because a LiAlCl4 synthetic reaction is influenced by the water content is solved, and the yield of LiAlCl4 can be greatly improved.

Description

technical field [0001] The invention relates to a production method of lithium tetrachloroaluminate. Background technique [0002] Lithium thionyl chloride and lithium sulfate chloride are two promising lithium batteries, lithium tetrachloroaluminate (LiAlCl 4 ) is an essential electrolyte. The common production method of lithium tetrachloroaluminate is to combine dried and purified lithium chloride (LiCl) and aluminum trichloride (AlCl 3 ) is obtained by melting and reacting in a dry closed reactor. However, this reaction is due to the influence of trace moisture, LiAlCl 4 The yield is not high, only about 80%. Contents of the invention [0003] In order to solve the problem with LiCl and AlCl 3 Preparation of LiAlCl by melting reaction 4 , LiAlCl 4 The technical problem that the productive rate is not high, the present invention provides a kind of production method of lithium tetrachloroaluminate, comprises the following steps: the anhydrous lithium chloride of su...

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 Applications(China)
IPC IPC(8): C01F7/04
Inventor 李永康缪苒
Owner BYD CO LTD