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Production system and production method for synthesizing hydrocyanic acid by Andrussow process

A production system, hydrocyanic acid technology, applied in the field of organic synthesis, can solve the problems of uncertain air, ammonia and natural gas ratio, large resistance loss of air delivery system, complex process route, etc., to reduce pipeline pressure loss, The effect of reducing energy consumption and simplifying the process route

Active Publication Date: 2014-01-29
CHONGQING UNISPLENDOUR INT CHEM
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Problems solved by technology

Moreover, ordinary reciprocating air compressors have unstable air flow, so that the precise ratio of air, ammonia and natural gas cannot be determined during operation, so an air buffer tank device must be installed on the air pipeline
Therefore, the traditional Angle method has problems such as large energy loss, large resistance loss of the air delivery system, and complicated process routes.

Method used

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  • Production system and production method for synthesizing hydrocyanic acid by Andrussow process

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Embodiment 1

[0037] The Angle method is the ammoxidation method, which is a method of converting ammonia sources, oxygen sources, and ammoxidable organic matter into cyanide at high temperature in the presence of an ammoxidation catalyst. The Angle method was proposed by L.Andrussow (L.Andrussow) of the German I.G company, and was the first to realize a method of industrialized production of hydrocyanic acid in Germany. The main raw materials used are methane, ammonia and oxygen, so it is also called Methane ammoxidation method or direct method. It uses platinum as a catalyst to produce hydrocyanic acid. At present, the Angle method is one of the main methods for the industrial production of hydrocyanic acid in foreign countries. The Angle method is mature in technology, economical and reasonable, and uses natural gas (methane) as raw material, which is rich in resources.

[0038] The invention provides a production system for synthesizing prussic acid by Angle's method, comprising a natu...

Embodiment 2

[0048] This embodiment provides a production method for the synthesis of prussic acid by the Angle method. Firstly, the purified heated air is mixed with purified and heated ammonia gas, and the mixed gas is mixed with purified and heated natural gas, and then passed through a flame arrester into the reactor to react.

[0049] As a preference, the above-mentioned purified and heated air is mixed with the purified and heated ammonia gas on the air pipeline, which simplifies the binary mixing device, and the three materials are preheated separately, which can avoid the three-component mixture in a large range. The explosion point of this gas; in the past, the air pressure obtained after using the reciprocating compressor air compressor to compress the air is 0.22Mpa, which is higher than the pressure required for the reaction. It is necessary to reduce the pressure. The process of reducing the pressure will increase the temperature. To meet the reaction temperature and need to c...

Embodiment 3

[0051] This embodiment provides a production method for Angle's synthesis of hydrocyanic acid. First, the purified air is heated to 80°C, the purified ammonia is heated to 80°C, the purified natural gas is heated to 80°C, and then Mix the purified and heated air with the purified and heated ammonia gas, mix with the purified and heated natural gas, and finally enter the reaction gas reaction through the flame arrester, measure the output of hydrocyanic acid, and calculate the consumption , it can be seen that every ton of hydrocyanic acid produced saves 12.3% of natural gas.

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Abstract

The invention provides a production system and a production method for synthesizing hydrocyanic acid by an Andrussow process. The production system comprises a natural gas conveying system, an air conveying system, an ammonia gas conveying system and mixed reaction equipment, wherein an outlet of the air conveying system and an outlet of the ammonia gas conveying system are joined at one place and communicated with an inlet of the mixed reaction equipment; an outlet of the natural gas conveying system is communicated with an inlet of the mixed reaction equipment. The production method comprises the following steps: mixing air and ammonia gas; mixing the mixed gas with natural gas; and introducing the mixture into a reactor for reaction through a flame arrester. According to the production system and production method provided by the invention, hot ammonia gas and hot air are mixed on an air pipeline, three materials are separately preheated respectively, the burst points of the three gases can be avoided in a large range, the process route and process equipment are simplified, the reaction efficiency is improved, the energy consumption is reduced, the raw material natural gas can be saved by 10-15%, and 5-5.5 million yuan can be saved per year.

Description

technical field [0001] The invention relates to the organic synthesis industry, in particular to a production system and a production method for anneal method for synthesizing hydrocyanic acid. Background technique [0002] Hydrocyanic acid is a chemical raw material with a wide range of uses, widely used in medicine, food additives, feed additives, electroplating, metallurgy, polymers, photography, mining, rubber, cosmetics, pesticides, dyes, fertilizers and other fields. At present, there are mainly four synthesis methods in the industry: one is Angle's method, the principle of which is to use methane, ammonia and oxygen in the air as raw materials, and high-temperature oxidation synthesis in the presence of a platinum catalyst; the other is BMA invented by Degussa Company The principle is to use methane and ammonia to synthesize without adding oxygen; the third is the formamide dehydration method invented by BASF. The fourth is the light oil cracking method, which uses a...

Claims

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Application Information

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IPC IPC(8): C01C3/02
Inventor 方善伦柳亚玲刘丹徐代行黄真
Owner CHONGQING UNISPLENDOUR INT CHEM
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