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Safe process and system for producing and purifying hydrogen cyanide

A hydrogen cyanide and safe technology, applied in the field of high-purity liquid hydrogen cyanide, can solve the problems of less research on purification and purification, and achieve the effects of good market promotion and application value, low pressure and low reaction temperature

Active Publication Date: 2019-01-22
HUAYANG NEW MATERIAL TECH GRP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since most hydrogen cyanide chemical industries can directly use hydrogen cyanide gas or other mixtures without separation and purification, there are few related studies on subsequent purification

Method used

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  • Safe process and system for producing and purifying hydrogen cyanide

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described in detail below.

[0025] Preparation of the present invention, purification process and related devices are as follows, as figure 1 Shown:

[0026] (1) Raw material mixing and preheating device:

[0027] After the ammonia gas is preheated and vaporized, it is first mixed with an inert gas and then mixed with compressed air. The ammonia gas preheating temperature is 20~40°C, and the compressed air pressure is 0.1~0.4Mpa. The mixed gas enters the tube furnace from around the methanol feed nozzle, pushes the methanol upward to vaporize and mixes with methanol. Ammonia is mixed with inert gas and air successively, and then mixed with methanol. The substance ratio of ammonia to methanol in the mixed gas is 1.02~1.10:1, the ratio of ammonia to air is 0.1~0.12:1, and the volume of the mixed inert gas accounts for 12~18% of the total volume of the mixture , to reduce the explosive characteristics of the reacti...

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Abstract

The invention discloses a process for producing and purifying to obtain high-purity liquid hydrogen cyanide acid applicable to ammoxidation of methanol and a related system thereof. The process mainly comprises a raw material vaporization furnace, an ammoxidation reactor, an ammonia removal tower, a hydrogen cyanide absorbing tower, a rectifying tower and other devices. Compared with the traditional hydrogen cyanide producing process, the method takes inert gas as an explosion suppressant, eliminates flammability and explosion ability of the reactive mixed gases and has the characteristics of low reaction temperature, low pressure, stable temperature control, safety and reliability. Particularly decompression operations are adopted during distillation purification, and high-concentration hydrogen cyanide leaking risk and column reactor hydrogen cyanide polymerization reaction can be reduced. The process is readily available in raw materials, is small in waste emission amount in the whole process, clean, environmental-friendly and high in safety degree and is particularly suitable for medium / small-scale hydrogen cyanide production and purification.

Description

technical field [0001] The invention belongs to the technical field of chemical production technology, specifically a process and device for preparing and purifying high-purity liquid hydrogen cyanide by methanol ammoxidation method, and adopting a device with a suitable scale according to the process can be used for large-scale industrial production Or a small amount of high-purity liquid hydrogen cyanide can be obtained in the laboratory. Background technique [0002] Hydrocyanic acid is an important raw material for organic chemical synthesis, mainly used in the production of adiponitrile, methionine, glycine, glyphosate, methyl methacrylate and sodium cyanide, etc., in pesticides, medicines, dyes, additives and Metallurgy and other aspects have a wide range of applications. When producing adiponitrile, methionine, and other cyanide-containing chemical and pharmaceutical intermediates, it is often necessary to use high-purity liquid hydrogen cyanide, but because hydrogen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C3/02
CPCC01C3/0225C01C3/0241C01C3/0295
Inventor 潘蓉童明全李健李超琚裕波韩艳辉袁秋华冯志武
Owner HUAYANG NEW MATERIAL TECH GRP CO LTD
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