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Technique for preparing phosphine by heating white phosphorous placed into potassium hydroxide solution

A technology of potassium hydroxide and solution, which is applied in the field of chemical synthesis of phosphine, can solve problems such as pollution, and achieve the effect of convenient use and reasonable design

Inactive Publication Date: 2011-01-26
TIANJIN TAIYUAN INDAL GAS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This technology not only has reasonable process, simple preparation, but also easy to obtain raw materials, high product yield, and the purity of the produced phosphine reaches 5N (99.999%), and solves the problem of environmental pollution

Method used

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  • Technique for preparing phosphine by heating white phosphorous placed into potassium hydroxide solution
  • Technique for preparing phosphine by heating white phosphorous placed into potassium hydroxide solution

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Embodiment Construction

[0010] refer to figure 1 , generating bottle (1), 1# cold trap (2), drying tube (3), 2# cold trap (4), 3# cold trap (5), 4# cold trap (6), 5# cold trap ( 7), 6# cold trap (8) is formed by assembling the connecting pipeline (9) according to its system function.

[0011] When in use, a certain amount of white phosphorus is added to the generating bottle (1), and then a stoichiometric potassium hydroxide dilute solution is added through a separatory funnel. Then, after blowing off the air in the preparation device with deoxygenated hydrogen, the generator bottle was heated to 60°C. The phosphine generated by the reaction, the hydrogen generated by the side reaction and the large amount of water it carries pass through the drying pipe (3) and its multiple cold traps (-90°C, -100°C, -180°C). In the cold trap, What is condensed is mainly diphosphine (P 2 h 4 ), and in the cold trap, phosphine is condensed. The phosphine is then carefully distilled into the next cold trap. Phos...

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Abstract

The invention discloses a technique for preparing phosphine by heating white phosphorous placed into potassium hydroxide, mainly composed of a generating bottle, a first cold trap, a drying tube, a second cold trap, a third cold trap, a fourth cold trap, a fifth cold trap and a sixth cold trap which are assembled into a whole by virtue of connecting pipelines according to system function. The invention has reasonable design and use convenience, thus being an ideal phosphine preparation process technology.

Description

Technical field [0001] The invention relates to a technology for chemically producing phosphine, in particular to a technology for preparing phosphine by heating white phosphorus in potassium hydroxide solution, which is suitable for chemical synthesis of phosphine. Background technique [0002] At present, phosphine has important uses in many industrial fields such as semiconductor industry, chemical industry, grain storage industry and metallurgical industry, but the production process is complicated, the cost is high, and the product quality is poor. Contents of the invention [0003] The problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a technology for preparing phosphine by heating white phosphorus in a potassium hydroxide solution. The technology is not only reasonable in process and simple in preparation, but also has easy-to-obtain raw materials, high product yield, and the purity of the produced phosphine r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/06
Inventor 李中元
Owner TIANJIN TAIYUAN INDAL GAS
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