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Preparing method of cube-sugar-shaped nickel carbonyl powder

A technology of nickel carbonyl powder and nickel carbonyl, which is applied in the field of preparation of sugar-like nickel carbonyl powder, can solve the problems of easy ignition, substandard indicators, insufficient control and monitoring means, etc., so as to reduce production costs and improve the direct yield of products. Effect

Inactive Publication Date: 2018-03-27
JINCHUAN GROUP LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The purification decomposer heating of the purification treatment system is mainly suitable for the purification treatment of the decomposition gas containing low concentration of nickel carbonyl. For the decomposition gas containing high concentration of nickel carbonyl, due to the relatively limited number and capacity of the decomposition heating section, the control and monitoring methods are also insufficient. , the amount of output powder is large but the index is not up to standard, and it is prone to fire and other phenomena, resulting in the output of nickel carbonyl powder can not be effectively recovered to deal with sales, the overall nickel direct recovery rate of carbonyl nickel decomposition system is low, which increases production cost

Method used

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  • Preparing method of cube-sugar-shaped nickel carbonyl powder
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  • Preparing method of cube-sugar-shaped nickel carbonyl powder

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preparation example Construction

[0011] A kind of preparation method of sugar cube-shaped nickel carbonyl powder of the present invention, the untreated exhaust gas containing free nickel carbonyl produced in the production process of carbonyl nickel powder is passed into the decomposer of the decomposition system, and the amount containing free nickel carbonyl accounts for The rectification treatment liquid volume is 6-7%. The decomposer of the decomposition system is heated in sections, which are divided into seven sections. The heating temperature of the first five sections is lower than 280°C in each section, and the temperature of the sixth and seventh sections is lower than 220°C. The amount of exhaust gas to be treated is based on the actual amount of exhaust gas from rectification.

[0012] Further, the temperature distribution of the seven stages of the decomposer of the decomposition system is 255°C-275°C for the first stage, 260°C-280°C for the second stage, 245°C-275°C for the third stage, 230°C-27...

Embodiment 1

[0015] In the process of producing nickel carbonyl powder using the exhaust gas of the rectification tower, the temperature distribution of the seven stages of the decomposer is 275°C for the first stage, 280°C for the second stage, 275°C for the third stage, 270°C for the fourth stage, 255°C for the fifth stage, and 220°C for the sixth stage. ℃, 195℃ in the seventh stage, the residence time of carbonyl nickel powder in the decomposer is 2min. The bulk density of nickel carbonyl powder produced is 2.51g / cm 3 , with an average particle size of 6.6 μm and a carbon content of 0.14%, the morphology tends to be regular, and the chain bead-shaped nickel carbonyl powder with sugar cube-like structure (such as figure 1 ).

Embodiment 2

[0017] In the process of producing nickel carbonyl powder using the exhaust gas of the rectification tower, the temperature distribution of the seven stages of the decomposer is 265°C for the first stage, 270°C for the second stage, 255°C for the third stage, 260°C for the fourth stage, 250°C for the fifth stage, and 210°C for the sixth stage. ℃, the seventh stage is 195℃, the residence time of carbonyl nickel powder in the decomposer is 3min. The bulk density of nickel carbonyl powder produced is 2.67g / cm 3 , the average particle size is 6.9 μm, the morphology of the carbon content of 0.12% tends to be regular, and the particles are gradually dispersed nickel carbonyl powder (such as figure 2 ).

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Abstract

The invention provides a preparing method of cube-sugar-shaped nickel carbonyl powder. To-be-treated externally-discharged gas which is generated in the nickel carbonyl powder production process and contains free-state nickel carbonyl is led into a splitter of a splitting system, the amount of the contained free-state nickel carbonyl occupies 6%-7% of the amount of rectification conditioning fluid, seven sections of heating is adopted by the splitter of the splitting system, the heating temperature of the first five sections is lower than 280 DEG C, and the temperature of the sixth and seventhsections is lower than 220 DEG C. The preparing method has the beneficial effects that rectifying tower exhausted gas containing high-concentration nickel carbonyl is led into the splitter of the splitting system for thermal decomposition treatment, produced powder indicator conditions meet client parameter requirement, the microstructure is in a cube sugar shape, the powder can be external sold,the product direct yield is effectively improved, the direct yield is improved to 98.83% from 93%, and the production cost of the nickel carbonyl powder is reduced.

Description

technical field [0001] The invention relates to a method for preparing sugar cube-shaped nickel carbonyl powder, in particular to a method for decomposing the exhaust gas of a rectification tower containing high-concentration nickel carbonyl to produce nickel carbonyl powder whose physical and chemical indicators meet customer requirements and can be processed for export . Background technique [0002] The production of nickel carbonyl powder includes the synthesis of nickel carbonyl—rectification and purification—evaporation—decomposition—post-treatment, etc. The decomposition gas (or exhaust) containing nickel carbonyl generated during the whole production process must be purified and disinfected before being processed. can be discharged. In actual production, affected by the cooling effect of the exhaust condenser of the rectification tower, a relatively large amount of free nickel carbonyl is mixed in the exhaust gas, accounting for about 6-7% of the rectification treat...

Claims

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Application Information

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IPC IPC(8): B22F9/30
CPCB22F9/305
Inventor 王永前肖冬明马国生白玉婷江林刘洪彪李登瑞冀文利杨小刚刘福周陈旭军王良
Owner JINCHUAN GROUP LIMITED
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