Method for recycling ammonia and acetylene in acetylene reaction tail gas

By recovering acetylene and ammonia from the tail gas of the acetylene reaction through an acetylene absorption system and an ammonia absorption and desorption system, the problem of unused tail gas of the acetylene reaction is solved, and the effects of efficient recovery and reduced production costs are achieved.

CN117018824BActive Publication Date: 2026-05-29SHANGYU NHU BIOCHEM IND +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGYU NHU BIOCHEM IND
Filing Date
2023-08-08
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The unutilization of acetylene and ammonia in the tail gas of the acetylene reaction leads to increased production costs and environmental pollution, and incineration poses safety risks.

Method used

Acetylene is recovered from the tail gas of the acetylene reaction by using an acetylene absorption system, ammonia is absorbed by an ammonia absorption system, and ammonia is recovered by an ammonia desorption system, thus achieving efficient recovery and utilization of acetylene and ammonia.

Benefits of technology

It effectively recovers acetylene and ammonia, reduces production costs, solves the safety and environmental problems of direct emission and incineration of exhaust gas, and achieves a high recovery rate of acetylene and ammonia.

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Abstract

The present application relates to a kind of recycling method of acetylene and ammonia in acetylene reaction tail gas, the acetylene reaction tail gas is discharged with liquid ammonia as solvent and contains acetylene and ammonia in the tail gas of acetylene reaction;The recycling method of the acetylene reaction tail gas includes the following steps: (1) the acetylene reaction tail gas is passed into acetylene absorption system, and the acetylene in the acetylene reaction tail gas is absorbed by acetylene absorbent;(2) the tail gas after being treated in step (1) is passed into ammonia absorption system, and the ammonia in the processed tail gas is absorbed by ammonia absorbent, to obtain the absorption material containing ammonia;(3) the absorption material containing ammonia obtained in step (2) is desorbed in ammonia desorption system to recover ammonia.The recycling method in the application can effectively recover acetylene and ammonia in acetylene reaction tail gas, and make acetylene and ammonia have high recovery rate, solve the safety environmental protection problem existing in tail gas direct discharge or incineration treatment, and also can reduce production cost.
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Citation Information

Patent Citations

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  • Gas recovery device and recovery method

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