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An environmentally friendly and clean process method for producing hydrocyanic acid derivatives from coal bed gas

A process method, the technology of hydrocyanic acid, applied in the direction of cyanide, metal cyanide, chemical instruments and methods, etc., can solve the problems that affect the utilization of coalbed methane and the high cost of purification, so as to achieve rich raw material guarantee, improve purification efficiency, and good economy The effect of benefits and social benefits

Active Publication Date: 2015-10-07
李宽义
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology is used for civil and industrial fuels, power generation, automobile fuels, and production of carbon black, all of which need to be purified at a higher concentration, and the purification cost is high. The comprehensive cost of the available methane gas obtained from the purification of coalbed methane is higher than that of oil and natural gas. The cost, especially the purification cost of low-concentration coal mine gas is much higher than the cost of oil and natural gas
Therefore, the utilization of coalbed methane (coal mine gas) has been seriously affected

Method used

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  • An environmentally friendly and clean process method for producing hydrocyanic acid derivatives from coal bed gas
  • An environmentally friendly and clean process method for producing hydrocyanic acid derivatives from coal bed gas
  • An environmentally friendly and clean process method for producing hydrocyanic acid derivatives from coal bed gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: coal bed gas: methane 48.3%, oxygen 10.1%, nitrogen 39.1%, water 1.5%, other 1.0%, separate by pressure swing adsorption and other auxiliary separation devices, obtain O respectively 2 and N 2 Mixed gas, CH 4 Gas and tail gas; CH 4 The gas is used for the synthesis of hydrocyanic acid by Angler's ammoxidation.

[0038] Separation of coalbed methane to get CH 4 (methane gas) composition:

[0039] serial number component name Component ratio% serial number component name Component ratio% 1 CH 4 73.520 6 CO 2 0.213 2 H 2 0.978 7 CO 0.133 3 h 2 o 0.112 8 Ar 0.016 4 N 2 20.013 9 other 0.004 5 O 2 5.011 10

[0040] Using the above coalbed methane separation to obtain CH 4 (Methane gas) According to the requirements of Angle's ammoxidation synthesis reaction, the calculated amount of ammonia and air is obtained by secondary mixing. The composition is as follows:

[0041] ...

Embodiment 2

[0058] Embodiment 2: same as embodiment 1, utilize above-mentioned coal bed gas separation to obtain CH 4 (Methane gas) Synthesis gas is obtained through Angle's ammoxidation synthesis reaction; reaction synthesis gas is combined to remove ammonia to obtain reaction synthesis gas without ammonia or trace ammonia; synthesis gas after ammonia removal is absorbed by formaldehyde solution to obtain high-purity Aqueous solution of hydroxyacetonitrile for the synthesis of high-purity hydrocyanic acid derivatives.

[0059] The composition of the synthesis gas is as follows:

[0060] serial number component name Component ratio% serial number component name Component ratio% 1 HCN 8.092 6 N 2 54.328 2 NH 3 1.508 7 CO 2 0.503 3 h 2 o 25.513 8 CO 4.705 4 CH 4 0.462 9 H 2 4.765 5 O 2 0.020 10 other 0.104

[0061] Syngas uses phosphoric acid or ammonium dihydrogen phosphate as a carrier to perform primary amm...

Embodiment 3

[0070] Embodiment 3: same as embodiment 2, utilize above-mentioned coal bed gas separation to obtain CH 4 (Methane gas) Synthesis gas is obtained through Angle's ammoxidation synthesis reaction; reaction synthesis gas is combined to remove ammonia to obtain reaction synthesis gas without ammonia or trace ammonia; synthesis gas after ammonia removal is absorbed by deionized water to obtain hydrogen The cyanic acid aqueous solution is refined to obtain high-purity liquid hydrocyanic acid, which is used for the synthesis of hydrocyanic acid derivatives; the tail gas is absorbed and sent to the tail gas incineration device for incineration. The quality that obtains high-purity liquid hydrocyanic acid is as follows:

[0071] Hydrocyanic acid (%) CO 3 2- (%) NH 3 + (%) other 99.78 - - water, trace impurities

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Abstract

Disclosed is an environmentally friendly and clean process using a coal bed gas to produce hydrocyanic acid derivatives, especially using a coal bed gas at a low concentration to produce the hydrocyanic acid derivatives, characterized by an environmentally friendly and clean process using a concentrated methane gas with a low concentration requirement to produce hydrocyanic acid and the derivatives thereof. The relatively concentrated methane gas is obtained by separating means such as pressure swing adsorption of the coal bed gas and used to produce the hydrocyanic acid derivatives. This concentrated methane gas requires a relatively low concentration and may have large constituent portions of residual nitrogen gas, oxygen gas etc. This concentrated methane gas can be synthesized into a hydrocyanic acid mixed gas by ammoxidation, or reacted with sodium hydroxide aqueous solution to obtain sodium cyanide for synthesizing downstream hydrocyanic acid derivatives, with formaldehyde and other aldehydes into hydroxyl acetonitrile and other derivatives for synthesizing downstream hydrocyanic acid derivatives, or absorbed with water or other solvents and purified to obtain a highly pure liquid hydrocyanic acid for synthesizing downstream hydrocyanic acid derivatives.

Description

technical field [0001] A method related to the production of hydrocyanic acid derivatives refers to an environmentally friendly and clean process method for producing hydrocyanic acid derivatives by utilizing coalbed methane, especially an environmentally friendly and clean process method for producing hydrocyanic acid derivatives using coalbed gas with low methane content; Fully considering the environmental protection of the recovery and comprehensive resource utilization of coalbed methane containing methane released before or during the mining of raw coal and the production of hydrocyanic acid derivatives, it is an environmentally friendly and clean production method for comprehensive resource utilization. Background technique [0002] Coal bed gas is commonly known as "coal mine gas". Its main component is CH4 (methane), which is associated with coal and stored in the coal seam in an adsorbed state. The calorific value is 2-5 times that of general coal. The calorific va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C255/12C01C3/02C07C253/08
CPCC01C3/0212C01C3/10
Inventor 李宽义曾雯娟龙智许晨李俊白先丽
Owner 李宽义