Preparation method of carbonyl nickel powder

A kind of carbonyl nickel powder, carbonyl nickel technology, applied in the field of preparation of low carbon carbonyl nickel powder, can solve the problems of unpublished literature reports, difficult process and the like

Inactive Publication Date: 2011-05-25
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the production of carbonyl nickel powder with low carbon content, the process is very d...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Control the decomposer to form six temperature sections from top to bottom, among which the temperature of the first and second sections: 300-310°C; the third and fourth sections: 320-330°C; the fifth and sixth sections: 260-300°C. The nickel carbonyl vapor with a flow rate of 1900-2000L / min and the carbon monoxide gas with a flow rate of 3500-4000L / min are passed into the mixing tank, so that the nickel carbonyl vapor and carbon monoxide gas form a mixed gas in a ratio of 1:2. Then pass the mixed gas into the cracker to maintain the pressure in the cracker at 3-15KPa. The nickel carbonyl in the mixed gas begins to decompose to obtain nickel carbonyl powder with a carbon content of 0.1% to 0.15%.

Embodiment 2

[0014] Control the decomposer to form six temperature sections from top to bottom, among which the temperature of the first and second sections: 270-290°C; the third and fourth sections: 290-310°C; the fifth and sixth sections: 250-280°C. The nickel carbonyl vapor with a flow rate of 1700-1800L / min and the carbon monoxide gas with a flow rate of 7500-8000L / min are passed into the mixing tank, so that the nickel carbonyl vapor and carbon monoxide gas form a mixed gas in a ratio of 1:4. Then pass the mixed gas into the cracker to maintain the pressure in the cracker at 10.0-15.0KPa. The nickel carbonyl in the mixed gas begins to decompose to obtain nickel carbonyl powder with a carbon content of 0.05% to 0.11%.

Embodiment 3

[0016] Control the decomposer to form six temperature sections from top to bottom, among which the temperature of the first and second sections: 270-290°C; the third and fourth sections: 290-300°C; the fifth and sixth sections: 260-280°C. The nickel carbonyl vapor with a flow rate of 1500-1600L / min and the carbon monoxide gas with a flow rate of 6000-6400L / min are passed into the mixing tank, so that the nickel carbonyl vapor and carbon monoxide gas form a mixed gas in a ratio of 1:4. Then pass the mixed gas into the cracker to maintain the pressure in the cracker at 7-10.0KPa. The nickel carbonyl in the mixed gas begins to decompose to obtain nickel carbonyl powder with a carbon content of 0.02% to 0.06%.

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Abstract

A preparation method of carbonyl nickel powder relates to a kind of carbonyl nickel powder, in particular to a preparation method of low-carbon carbonyl nickel powder. The preparation process is that carbonyl nickel vapor and carbon monoxide gas are used to form a mixed gas and the mixed gas passes through a decomposer and is heated and decomposed to prepare carbonyl nickel powder. The preparation method is characterized in that the disproportionation reaction of CO under high temperature is controlled in the heat decomposition process, thus the carbon content of the nickel powder is controlled. The preparation method of the carbonyl nickel powder comprises the following steps: the mixed gas consisting of carbonyl nickel vapor and carbon monoxide gas is introduced in the decomposer from the upper part of the decomposer, the carbonyl nickel in the mixed gas is heated and decomposed to generate metal nickel particles in the falling process, the disproportionation reaction of CO is limited under high temperature by controlling the decomposition conditions and the carbon content of the nickel powder is controlled to obtain the carbonyl nickel powder product with the carbon content of 0.01%-0.15% finally.

Description

technical field [0001] The invention discloses a preparation method of carbonyl nickel powder, relating to a preparation method of carbonyl nickel powder, in particular to a preparation method of low-carbon carbonyl nickel powder. Background technique [0002] Carbonyl nickel powder is nickel powder produced by decomposing carbonyl nickel. Carbonyl nickel powder has the characteristics of high purity and low metal impurity content. Compared with nickel powder produced by other processes, it has low impurity metal content and non-metallic impurities can be adjusted according to needs. Features, widely used in powder metallurgy industry. Because the decomposition process is accompanied by the influence of nickel catalysis, there is a disproportionation reaction of carbon monoxide to generate carbon and carbon dioxide. In the nickel carbonyl powder prepared by decomposition of nickel carbonyl, there will be a certain carbon content, usually free carbon and nickel carbide. [0...

Claims

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Application Information

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IPC IPC(8): C01G53/02
Inventor 王芳镇禹松涛刘军位王良
Owner JINCHUAN GROUP LIMITED
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