SU1167153A1 - Method of obtaining lithium carbonate - Google Patents

Abstract

A METHOD FOR OBTAINING CARBON-ACID LITHIUM, including carbonation of solid hydrochloride lithium4, t4 and h) and c) 1 by the fact that, in order to obtain a product of a given granulometric composition and more uniformity of the latter, carbonization of the lithium hydroxide monohydrate at 1504 WITH.

Description

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The invention relates to methods for producing lithium carbonate used in the manufacture of vacuum glass and can be used in the chemical industry, 5

The purpose of the invention is to obtain a product of a given particle size distribution and an increase in the homogeneity of the product. .

Example 1. 280 kg of crystalline lithium hydroxide monohydrate, 95% of which are crystals more than 0.5 mm in size, are continuously loaded into a tumble dryer.

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the heating of which is produced by heat from the combustion of natural gas. The temperature in the tumble dryer is

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The carbonization is carried out with carbon dioxide contained in the flue gases, as well as additionally introduced carbon dioxide from the calcareous kilns.

Get 227 kg of lithium carbonate of the following particle size distribution.

In tab. 1 shows the particle size distribution of the product.

Table 1

Prokhokhodekie through a sieve with a grid

-0,045 Not more than 20 № 0045К

The total yield of the target product is 98.46% with a basic substance content of 99.2%. All the resulting product particle size corresponds to

8,8

technical conditions and does not require classification.

In tab. 2 shows other examples of the implementation method and product characteristics.

table 2

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As can be seen from the examples, when maintaining When going beyond the temperature limits of the process of interaction of components of a high volume mode

The temperature range of 150 - 400 ° C is 84.77%.

the yield of the product specified by the granu is 14-16%;

The lometric composition was a fraction of 0.4-0.5 mm.

100%. Technical and economic aspect. At the same time, more than 72%. It constitutes a fraction of a given particle size range of 0.1-0.4 mm. and an increase in its homogeneity.

The inventive invention is to obtain

Claims (1)

METHOD FOR PRODUCING LITHIUM CARBON, including carbonization of solid lithium hydroxide, on the basis of; and with the fact that, in order to obtain a product of a given particle size distribution and to increase the homogeneity of the latter, lithium hydroxide monohydrate is carbonized at 15040G ° C. 1 .1167153