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Dust-free lithium hydroxide monohydrate and preparation method thereof

A technology of monohydrate lithium hydroxide and drying equipment, applied in the direction of lithium oxide;/hydroxide, etc., can solve the problems of easy agglomeration, good water solubility and high main content, achieve no irritating odor and improve water solubility , the effect of expanding the scope of use

Active Publication Date: 2016-03-23
天齐锂业(江苏)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of short storage time, easy agglomeration, low main content and poor water solubility of the above-mentioned dust-free lithium hydroxide monohydrate, and provides a new type of dust-free lithium hydroxide monohydrate, which does not raise dust and has a long life. Time storage without caking, high main content, good water solubility

Method used

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  • Dust-free lithium hydroxide monohydrate and preparation method thereof
  • Dust-free lithium hydroxide monohydrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the process of preparing lithium hydroxide, the monohydrate lithium hydroxide solid dehydrated by the centrifuge is evenly added into the running drum dryer; glycerin is continuously and evenly sprayed into the feeding port at the front end of the drum dryer, and the injection amount is monohydrate 0.02% of the weight of lithium hydroxide; spray polyethylene glycol-400 into the feed port in the middle of the rotary drum dryer, and the injection amount is 0.3% of the weight of lithium hydroxide monohydrate; the temperature of the front section of the dryer is controlled at 70 ℃, control 40 ℃ in the middle and late stage, and the whole drying time is 105min; the dried product is loose and granular, and the dried product is measured and packaged, and the product has no dust phenomenon.

Embodiment 2

[0033] In the process of preparing lithium hydroxide, the lithium hydroxide monohydrate solid after the dehydration of the centrifuge is evenly added into the double-cone rotary dryer; and at the same time, polyethylene glycol with 1% weight of lithium hydroxide monohydrate is evenly sprayed through the feeding port. Mixed solution of -400 and sodium dodecylsulfonate; the feeding process should be uniform, and the modifier should be sprayed while feeding; during the drying process, the temperature of the material in the dryer should be controlled at 50°C, and the drying time should be 120 minutes; the drying should be loose The granular dry product is measured and packaged after drying, and the product has no dust phenomenon.

Embodiment 3

[0035] In the process of preparing lithium hydroxide, the monohydrate lithium hydroxide solid dehydrated by the centrifuge is evenly and continuously added to the running drum dryer; the feeding port at the front end of the drum dryer is continuously and evenly sprayed with sodium dodecylsulfonate The aqueous solution, the injection amount is 0.05% of the weight of lithium hydroxide monohydrate; the polyethylene glycol-400 is sprayed into the middle feeding port of the drum dryer, and the injection amount is 0.8% of the weight of lithium hydroxide monohydrate; During the drying process, the temperature of the material is controlled at 65°C in the front section of the dryer, 55°C in the middle and back section, and the entire drying time is 110min; the dry product is loosely dried, and the dried product is measured and packaged without dust. .

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Abstract

The invention discloses dust-free grade lithium hydroxide monohydrate (including dust-free battery grade lithium hydroxide and dust-free industrial grade lithium hydroxide) as well as a preparation method, and belongs to the field of lithium hydroxide. According to dust-free grade lithium hydroxide monohydrate provided by the invention, lithium hydroxide monohydrate refers to a dried loose granular product, the surface of lithium hydroxide monohydrate is coated with a modifier, and the modifier at least comprises polyethylene glycol and accounts for 0.01-1.05 percent of the weight of dust-free grade lithium hydroxide monohydrate. According to dust-free grade lithium hydroxide monohydrate disclosed by the invention, dust and pungent smell in the using process can be avoided, each chemical index accords with the national standard GB / T 8766-2013, the main content is more than or equal to 56.0 percent, and the water solubility of the product is improved. Dust-free grade lithium hydroxide monohydrate can be applied to different using modes such as stirring, mixing or dripping. Because dust-free grade lithium hydroxide monohydrate is a water-soluble product, the application range of dust-free grade lithium hydroxide monohydrate is widened.

Description

technical field [0001] The invention relates to a dust-free grade lithium hydroxide monohydrate and a preparation method thereof, belonging to the field of lithium hydroxide. Background technique [0002] Lithium hydroxide monohydrate is one of the most important lithium salts. It is widely used in chemical raw materials, chemical reagents, lithium-ion batteries, petroleum, metallurgy, glass, ceramics and other industries. It is also an important raw material for national defense industry, atomic energy industry and aerospace industry. . At present, lithium hydroxide monohydrate is mainly used to prepare lithium-based grease. Lithium-based grease, suitable for a wide temperature range (-50°C—+300°C), good fire resistance, difficult to oxidize, stable performance during multiple heating-cooling-heating cycles, long service life, and strong water resistance. [0003] During the use of ordinary lithium hydroxide, due to mixing, vibration, etc., it will cause obvious dust phen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D15/02
Inventor 涂明江杨柳李仕红廖仕英何霞
Owner 天齐锂业(江苏)有限公司