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Nickel carbonyl synthesizing method

A synthesis method, carbonylation technology, applied in the field of powder metallurgy, can solve the problems of nickel sulfide being unable to be carbonylated, slow carbonylation reaction speed, high carbonylation synthesis pressure, etc., to achieve lower temperature, high carbonylation rate, and reaction speed Improved effect

Inactive Publication Date: 2006-05-24
BEIJING CISRI GAONA TECH
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Problems solved by technology

This technology follows the weight ratio of Cu in the alloy: S=4: 1, and its reason is to emphasize Cu-Ni alloy just has the activity of being carbonylated under the situation of Cu in the alloy: S=4: 1, although the alloy of this composition Can be carbonylated, but the pressure required for carbonylation is high; the reaction speed of carbonylation is slow, generally takes 36 to 48 hours; the carbonylation rate is generally ≤95%
Especially when Cu:S is less than 4:1, a large amount of sulfur will cause Ni in the alloy 3 S 2 compound increases due to the Ni 3 S 2 Can not react with CO, nickel in sulfide cannot be carbonylated, so the synthesis rate will generally decrease, and the carbonylation rate will further decrease
Moreover, the carbonylation vessel in this report is a rotary synthesis kettle, which is a high-tech technology that can ensure rotary sealing. Only Canadian companies can manufacture it, and the cost is expensive.

Method used

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Embodiment Construction

[0020] According to the chemical composition of the raw materials used in the present invention, 6 batches of nickel carbonyl were synthesized by using the synthesis method of the present invention. Wherein Table 1 is the chemical composition list of the raw materials used in the present invention, and Table 2 is the process steps, process parameters and synthesis rate table of the synthetic method adopted in the present invention.

[0021] serial number

[0022] Preface

[0023] By adopting the raw materials and the synthesis method used in the invention, the sulfur is uniformly distributed in an interconnected network in the alloy, so the nickel carbonyl synthesis reaction proceeds very rapidly under relatively low pressure. The nickel carbonyl synthesis rate reaches 99.5% within 24 hours.

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Abstract

The invention belongs to the field of powder metallurgy, especially relating to a method for synthesizing nickel carbonyl, including the following steps of: (1) preparing active carbonyl synthesizing raw material: firstly heating the alloy to melt at 1600 deg.C-1650 deg.C, then rapidly condensing the melt by 0.3-0.5 MPa high pressure water spray, where the water temperature is controlled at 10 deg.C-15 deg.C and the spraying speed is 4-5 kg / min, and the size of the obtained alloy particles is 0.5 mm-5 mm, and the proportion of the particles of 0.5 mm-2 mm is not less than 85% and that of the particles of 2mm-5mm is not greater than 15%; (2) synthesizing nickel carbonyl: placing the prepared alloy particles in a high pressure kettle of 10 liter, and the carbonyl synthesizing conditions: the CO content fed in the high pressure kettle >=92%; CO circulating speed in the carbonyl synthesizing system is 8-12 times / h, and the pressure is 5-12 MPa, the temperature is 100 deg.C-150 deg.C, and the synthesizing time is 24-32 hours. The invention has the advantages of simple technique, low equipment manufacturing cost, high carbonyl synthesis ratio as compared with the existing technique.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, in particular to a method for synthesizing nickel carbonyl. Background technique [0002] At present, according to the report of the Canadian International Nickel Company, Cu-Ni alloy with a certain sulfur content can obtain highly active oxo raw materials after water atomization and granulation. The composition of the raw materials is Ni65-70%, Cu15%, Fe1 %, S4-5%, particle range 1-5mm, the synthesis conditions of nickel carbonyl are as follows: the content of CO is 90-95%, the pressure is 7.0MPa, and the temperature is 180°C. After 42 hours of synthesis reaction, the extraction rate of nickel reaches 95%. %, the above-mentioned documents are reported in Journal of Metals July1969.41-45. This technology follows the weight ratio of Cu in the alloy: S=4: 1, and its reason is to emphasize Cu-Ni alloy just has the activity of being carbonylated under the situation of Cu in the alloy: S=4: 1, althou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/02
Inventor 滕荣厚柳学全陈趣山刘思林
Owner BEIJING CISRI GAONA TECH
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