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Method for producing mixed oxides comprising lithium

A technology of mixed oxides and lithium compounds, applied in chemical instruments and methods, nickel compounds, cobalt compounds, etc., can solve the problems of high production capacity, low production capacity, unsuitable scale, etc., and achieve good sintering properties, high production capacity, and scale-up effect of scale

Active Publication Date: 2013-01-30
EVONIK OPERATIONS GMBH
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  • Abstract
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Problems solved by technology

[0007] A disadvantage of the spray pyrolysis methods disclosed in said journal documents is their low throughput, making industrial implementation uneconomical
Furthermore, these settings are not suitable for scaling up the method to higher throughput

Method used

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  • Method for producing mixed oxides comprising lithium
  • Method for producing mixed oxides comprising lithium

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Embodiment Construction

[0030] analyze:

[0031] d from the cumulative distribution curve of the volume-average particle size distribution 50 . This is determined in a conventional manner by means of laser light scattering. For the purposes of the present invention, a Cilas 1064 instrument from Cilas was used for this purpose. d 50 is the value at which 50% of the mixed oxide particles A are in the indicated particle size range. d 90 is the value at which 90% of the mixed oxide particles A are in the indicated particle size range. d 99is the value at which 99% of the mixed oxide particles A are in the indicated particle size range.

[0032] Solutions used: For Examples 1-6, solutions comprising the salts described in Table 1 were prepared in each case with water or 2-ethylhexanoic acid (2-EHA) as solvent.

[0033] An aerosol is produced from said solution by means of atomizing gas and a nozzle and atomized into the reaction space. Here, hydrogen and air H 2 / O 2 The flame burns and the ae...

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Abstract

The invention relates to a method for producing a mixed oxide powder comprising lithium, wherein a) a flow of a solution comprising at least one lithium compound and at least one metal compound of one or more mixed oxide components in the required stoichiometric ratio is atomized by means of an atomizing gas into an aerosol, having an average droplet size of less than 100 [mu]m, b) the aerosol is brought to reaction in a reaction chamber by means of a flame obtained from a mixture of combustion gas and air, wherein the total amount of oxygen is at least sufficient for completely converting the combustion gas and the metal compounds, c) the reaction chamber is cooled, and d) the solid product is then separated out of the reaction flow.

Description

technical field [0001] The invention relates to a process for the preparation of lithium-containing mixed oxides by spray pyrolysis. Background technique [0002] EP-A-814524 discloses a spray pyrolysis process for the preparation of lithium-manganese mixed oxides, in which lithium salts and manganese salts dissolved in a water / alcohol mixture are sprayed in the presence of oxygen through 400-900°C The formed aerosol is pyrolyzed under external heating, and the resulting reaction product is subsequently heat-treated to obtain a lithium-manganese mixed oxide with an average particle size of 1-5 μm and a specific surface area of ​​2-10 m 2 / g. EP-A-824087 discloses a similar process for the preparation of lithium-nickel mixed oxides or lithium-cobalt mixed oxides. EP-A-876997 additionally discloses the use of compounds providing oxygen during pyrolysis, such as hydrogen peroxide or nitric acid, for the preparation of these mixed oxides. [0003] A disadvantage of the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G1/02C01G53/00
CPCC01P2006/12C01G1/02C01G53/44C01G51/42C01G23/005C01P2004/51C01G53/006
Inventor S·卡图希奇P·克雷斯
Owner EVONIK OPERATIONS GMBH
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