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Environmentally friendly and clean process method for producing hydrocyanic acid derivatives by utilizing purge gas

A process method, the technology of hydrocyanic acid, applied in the directions of metal cyanide, inert gas compound, chemical instrument and method, etc., can solve the problem of not giving full play to the value of comprehensive utilization of purge gas, and achieve good economic and social benefits Effect

Inactive Publication Date: 2016-12-14
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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  • Environmentally friendly and clean process method for producing hydrocyanic acid derivatives by utilizing purge gas

Examples

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

4.765

5

O 2

0.020

10

othe...

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 environmentally friendly and clean process method for producing prussic acid derivatives by utilizing purge gas. It is characterized in that: the purge gas containing methane is separated by pressure swing adsorption device and other separation equipment to obtain ammonia (or methanol), hydrogen, nitrogen, methane and tail gas, and ammonia (or methanol), hydrogen and nitrogen are returned to synthetic ammonia ( or synthetic methanol) system is fully utilized, methane gas is used to synthesize hydrocyanic acid derivatives, tail gas is used for recycling of argon; methane gas is used to synthesize hydrocyanic acid for the synthesis of various hydrocyanic acid derivatives: methane gas is directly used for Hydrocyanic acid synthesis gas is synthesized by ammonia oxidation or ammoniated dehydrogenation, and the synthesis gas is absorbed and reacted with sodium hydroxide aqueous solution to obtain sodium cyanide for the synthesis of downstream hydrocyanic acid derivatives, synthesis gas and formaldehyde and other organic aldehydes to synthesize hydroxyacetonitrile and Other hydrocyanic acid derivatives are used for the synthesis of downstream hydrocyanic acid derivatives, and the synthesis gas is absorbed by water or other solvents and analyzed and purified to obtain liquid hydrocyanic acid and used for the synthesis of 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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Patent Type & Authority Patents(China)
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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