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Environmentally-friendly clean technology for producing hydrocyanic acid derivatives from coal-bed methane

A process method and technology for coalbed methane, applied in the direction of cyanide, metal cyanide, chemical instruments and methods, etc., can solve the problems of affecting the utilization of coalbed methane and high purification cost, and achieve rich raw material guarantee, improve purification efficiency, and reduce purification requirements. Effect

Active Publication Date: 2013-01-30
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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  • Environmentally-friendly clean technology for producing hydrocyanic acid derivatives from coal-bed methane
  • Environmentally-friendly clean technology for producing hydrocyanic acid derivatives from coal-bed methane
  • Environmentally-friendly clean technology for producing hydrocyanic acid derivatives from coal-bed methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 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.

[0039] Separation of coalbed methane to get CH 4 (methane gas) composition:

[0040] 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

[0041] 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:

[0042] ...

Embodiment 2

[0059] 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.

[0060] The composition of the synthesis gas is as follows:

[0061] 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

[0062] Syngas uses phosphoric acid or ammonium dihydrogen phosphate as a carrier to perform primary a...

Embodiment 3

[0071] 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 obtained through joint removal of ammonia to obtain reaction synthesis gas without ammonia or trace ammonia; the 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:

[0072] Hydrocyanic acid (%) CO 3 2- (%) NH 3 + (%) other 99.78 - - water, trace impurities

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Abstract

The invention provides an environmentally-friendly clean technology for producing hydrocyanic acid derivatives from coal-bed methane. The environmentally-friendly clean technology realizes production of hydrocyanic acid derivatives from low-concentration coal-bed methane. The environmentally-friendly clean technology is characterized in that hydrocyanic acid and its derivatives are prepared from concentrated methane having low content requirements; coal-bed methane is subjected to separation processes of pressure swing adsorption and the like to form relatively concentrated methane for production of hydrocyanic acid derivatives, wherein the relatively concentrated methane has relatively low concentration requirements and can retain residual nitrogen and oxygen having a large component ratio; and the relatively concentrated methane undergoes an ammoxidation synthesis reaction to produce hydrocyanic acid mixed gas, and the hydrocyanic acid mixed gas and a sodium hydroxide aqueous solution undergo a reaction to produce sodium cyanide for synthesis of downstream hydrocyanic acid derivatives, or the hydrocyanic acid mixed gas, formaldehyde and other aldehydes are synthesized into glycolonitrile and other derivatives for synthesis of downstream hydrocyanic acid derivatives, or the hydrocyanic acid mixed gas is absorbed by water or other solvents and then is purified to form high-purity liquid hydrocyanic acid for synthesis of 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 Applications(China)
IPC IPC(8): C01C3/02C07C255/12C07C253/08
CPCC01C3/0212C01C3/02C01C3/10
Inventor 李宽义曾雯娟龙智许晨李俊白先丽
Owner 李宽义
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