Method for synthesizing nickel carbonyl under medium pressure in rotating kettle

Abstract

The invention discloses a technology for synthesizing nickel carbonyl under medium pressure in a rotating kettle. The technology comprises the following preparation steps of: (1) preparing water-quenched copper-nickel alloy particles; (2) carrying out a carboxylation reaction; (3) separating; and (4) sterilizing residues in the kettle by using hot nitrogen replacement after the reaction is ended, feeding exhausted gas to an incinerator to be subjected to burning treatment, simultaneously recovering heat, opening a discharge hole and discharging the carbonylated alloy in the kettle after the nitrogen sterilization is finished, and then entering next circulation. According to the technology for synthesizing nickel carbonyl under medium pressure in the rotating kettle, the requirement on pressure is low and the pressure only needs 7.5-8.5MPa, the reaction time is greatly shortened by rotation of the rotating kettle, the yield is high, and the reaction speed can be controlled by means of the rotating speed of the rotating kettle if necessary. The rotating kettle is connected with a fixed airtight device through two groups of spiral flexible tube stacks, and therefore a dynamic and static conversion connection between the rotating kettle and other fixed pipelines is finished.

Description

technical field [0001] The invention mainly relates to a method for synthesizing nickel carbonyl, in particular to a method for synthesizing nickel carbonyl under pressure in a rotating kettle. Background technique [0002] According to the classification of pressure, there are three process routes of high pressure, medium pressure and normal pressure in nickel carbonyl synthesis technology. At present, foreign medium-voltage technology accounts for the largest proportion, and domestically only has high-pressure technology. [0003] The advantages of high-pressure synthesis are: good adaptability of raw materials, fast reaction speed, and high synthesis rate, which can reach more than 95%. The disadvantages are: high pressure level of equipment, large equipment investment, relatively high production cost, and limited production capacity. [0004] The advantages of atmospheric pressure synthesis are: low requirements on equipment, easy manufacture of equipment and large scal...

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Problems solved by technology

[0003] The advantages of high-pressure synthesis are: good adaptability of raw materials, fast reaction speed, high synthesis rate, which can reach more than 95%, and the disadvantages are: high pressure level of equipment, large investment in equipment, relatively high production cost, and limited production capacity

[0006] Nickel carbonyl synthesis used to be carried out in a fixed reactor. Its disadvantage is that the operating pressure is high, generally above 20Mpa, and there are also disadvantages such as slow reaction speed, low yield, and not easy to control the reaction speed.

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