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Environment-friendly clean process method for producing hydrocyanic acid derivatives by purge gas

A technology of hydrocyanic acid and its derivatives, applied in the direction of metal cyanide, inert gas compounds, chemical instruments and methods, etc., can solve the problems of not fully utilizing the value of the comprehensive utilization of purge gas, and achieve good economic and social benefits , to achieve the effect of comprehensive utilization

Inactive Publication Date: 2013-05-08
四川创元丽安科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The gas that is used for incineration is rich in methane gas; that is to say, the methane released from the synthesis of ammonia has been incinerated, and although the methane in the released gas has been incinerated to obtain a calorific value, the inventor thinks that the released gas has not been fully utilized. The value of comprehensive utilization of gas

Method used

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  • Environment-friendly clean process method for producing hydrocyanic acid derivatives by purge gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: The purge gas of synthetic ammonia is separated by pressure swing adsorption and other auxiliary separation devices to obtain H 2 , NH 3 , N 2 、CH 4 and exhaust gas; H 2 , NH 3 , N 2 Respectively enter the ammonia synthesis system for recycling, the tail gas is used to recover Ar, CH 4 It is used for the synthesis of hydrocyanic acid by Angle's ammoxidation.

[0041] The purge gas is separated to give CH 4 (methane gas) composition:

[0042] serial number

[0043] CH 4 (Methane gas) Synthesis gas is obtained through Angle's ammoxidation synthesis reaction, and the composition of the synthesis gas is as follows:

[0044] serial number

[0045] The synthesis gas is directly absorbed and reacted by sodium hydroxide aqueous solution without going through the ammonia removal process to obtain a high-purity sodium cyanide aqueous solution, and free ammonia remains in the tail gas; the quality table of the sodium cyanide aqueous solut...

Embodiment 2

[0060] Embodiment 2: same as embodiment 1, utilize above-mentioned synthetic ammonia to purge gas separation and 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 containing constant ammonia; synthesis gas after ammonia removal is absorbed by formaldehyde solution to obtain high-purity hydroxyl Acetonitrile aqueous solution, used to synthesize high-purity hydrocyanic acid derivatives.

[0061] The composition of the synthesis gas is as follows:

[0062] 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...

Embodiment 3

[0072] Embodiment 3: same as embodiment 2, utilize above-mentioned synthetic ammonia to purge gas separation and 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 containing constant ammonia; synthesis gas after ammonia removal is absorbed by deionized water to obtain hydrogen cyanide The acid aqueous solution is refined to obtain high-purity liquid hydrocyanic acid, which is used for the synthesis of hydrocyanic acid derivatives; absorbing tail gas and sending it to the tail gas incineration device for incineration. The quality that obtains high-purity liquid hydrocyanic acid is as follows:

[0073] Hydrocyanic acid (%)

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Abstract

The invention provides an environment-friendly clean process method for producing hydrocyanic acid derivatives by purge gas. The method is characterized in that: methane-containing purge gas is separated by a pressure swing adsorption device and other separation devices to obtain ammonia (or methanol), hydrogen, nitrogen, methane gas and tail gas; the ammonia (or methanol), hydrogen, and nitrogen are returned to an ammonia synthesis (or methanol synthesis) system for full utilization; the methane gas is used for synthesizing hydrocyanic acid derivatives; and the tail gas is used for argon recycle; the hydrocyanic acid synthesized by the methane gas is used for synthesizing various hydrocyanic acid derivatives: the methane gas is directly used for ammoxidation or ammonification dehydrogenation to synthesize hydrocyanic acid synthetic gas; an absorption reaction takes place between the synthetic gas and a sodium hydroxide aqueous solution to obtain sodium cyanide used for synthesizing downstream hydrocyanic acid derivatives; the synthetic gas reacts with formaldehyde and other organic aldehydes to synthesize hydroxy acetonitrile and other hydrocyanic acid derivatives used for synthesizing downstream hydrocyanic acid derivatives; the synthetic gas is subjected to absorption and dissolution purification by water or other solvents to obtain liquid hydrocyanic acid used for synthesizing downstream hydrocyanic acid derivatives.

Description

technical field [0001] A method involving the production of hydrocyanic acid derivatives refers to an environmentally friendly and clean process method for producing hydrocyanic acid derivatives by using purge gas, fully considering the methane gas produced by synthetic ammonia, synthetic methanol, and ammonia-alcohol joint production. The recovery and comprehensive recycling of vent gas and the environmental protection of the production process of hydrocyanic acid derivatives are environmentally friendly and clean production methods for comprehensive utilization of resources. Background technique [0002] Synthetic ammonia, synthetic methanol and ammonia-alcohol co-production industry are well-known industries. The components of the vent gas of the synthetic ammonia device mainly include ammonia, hydrogen, nitrogen, methane, argon and other gases, and the vent gas of the synthetic methanol and ammonia-alcohol co-production device is The main components of the gas are methan...

Claims

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Application Information

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IPC IPC(8): C01C3/02C01C3/10C01B23/00C07C255/12C07C253/10
Inventor 李宽义曾雯娟龙智许晨李俊白先丽童有鹏卓文斌
Owner 四川创元丽安科技有限公司
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