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Method for preparing acrylonitrile with propane as raw material

A technology of acrylonitrile and propane, which is applied in the field of preparing acrylonitrile, can solve the problems of reaction rate limitation, achieve the effects of reduced workload, simple reaction process, and reduced cost

Active Publication Date: 2015-08-26
临沂星火知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction rate is limited by propylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put propane and solution into the reaction kettle through steam, react at 300°C, 1.-5MPa, choose aluminum oxide and silicon dioxide as the catalyst for this reaction, and separate the acrylonitrile formed after reacting for 3 hours, unreacted The ammonia is absorbed by reacting with an aqueous solution of ammonium dihydrogen phosphate.

Embodiment 2

[0020] Put propane and solution into the reaction kettle through steam, react at 350°C and 2.5MPa, choose aluminum oxide and silicon dioxide as the catalyst for this reaction, and separate the generated acrylonitrile and unreacted ammonia after 7 hours of reaction Absorption by reaction with aqueous ammonium dihydrogen phosphate.

Embodiment 3

[0022] Put propane and solution into the reaction kettle through steam, react at 500°C, 3.5MPa, choose aluminum oxide and silicon dioxide as the catalyst for this reaction, and separate the generated acrylonitrile and unreacted ammonia after 5 hours of reaction Absorption by reaction with aqueous ammonium dihydrogen phosphate.

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PUM

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Abstract

The invention belongs to the technical field chemical engineering, and particularly relates to a method for using propane as a raw material to prepare acrylonitrile. The method for using propane as the raw material to prepare acrylonitrile comprises the following steps of: introducing propane and ammonia gas to a reaction kettle through steam, reacting to generate acrylonitrile, and absorbing the unreacted ammonia. The acrylonitrile is prepared from propane through ammoxidation. Compared with the traditional method for using propylene to prepare acrylonitrile, the method can effectively reduce cost, and the reaction process is relatively simple. On the other hand, in the process, the unreacted ammonia can be absorbed by reacting with an ammonium dihydrogen phosphate water solution. Except that the ammonia dosage is minimized and the ammonium sulfate induced environment pollution problem is solved, the method can reduce accumulation of organic wastes in the reaction tower, and further reduce the waste treatment workload.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing acrylonitrile by using propane as a raw material. Background technique [0002] Acrylonitrile is an important product of basic organic chemical industry. It is mainly used as a raw material for synthetic fibers, and is also an important raw material for synthetic rubber, synthetic resin and organic synthesis industry. At present, the propylene ammoxidation method is a common method for producing acrylonitrile. It is a pioneering research topic to study and develop the direct ammoxidation of propane to propene without cracking or dehydrogenation, which is cheap and yet to be rationally utilized. In the 21st century, petrochemical raw materials will probably be shifted to cheaper natural gas-like alkanes. Therefore, the transfer of raw materials from olefins to alkanes will be one of the focuses of petrochemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C253/24C07C255/08
Inventor 张成如
Owner 临沂星火知识产权服务有限公司
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