Epoxy chloropropane tail gas safety improvement method

A technology of epichlorohydrin and safety, which is applied in the field of improving the safety of epichlorohydrin tail gas, and can solve problems not related to epichlorohydrin
CN109734589APending Publication Date: 2019-05-10JIANGSU YANGNONG CHEM GROUP +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU YANGNONG CHEM GROUP
Publication Date
2019-05-10

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Abstract

The invention belongs to the technical field of organic chemical industry, and relates to an epoxy chloropropane tail gas safety improvement method, in particular to a process for preparing epoxy chloropropane by direct epoxidation of hydrogen peroxide. Reaction tail gas contains a small quantity of chloropropene, oxygen and nitrogen, the chloropropene and the oxygen have explosion limit, in orderto eliminate potential danger, the tail gas after reaction is led into under-pressure sodium phthalate water solution, the sodium phthalate water solution reacts with the chloropropene in the tail gas to generate diallyl phthalate, intrinsic safety of a process is ensured, the diallyl phthalate with higher additional values is generated, and VOC (volatile organic compounds) emission is reduced.
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Description

technical field

[0001] The invention belongs to the technical field of organic chemical industry, and relates to a method for improving the safety of epichlorohydrin tail gas, and more specifically, relates to a process in which epichlorohydrin is directly epoxidized by hydrogen peroxide, and the reaction tail gas contains a small amount of chlorine Propylene, oxygen and nitrogen, and there is an explosion limit between chloropropene and oxygen. In order to eliminate potential dangers, the tail gas after the reaction is passed into a pressurized aqueous solution of sodium phthalate to make it react with the chloropropene in the tail gas. The reaction generates diallyl phthalate, which not only ensures the intrinsic safety of the process, but also generates diallyl phthalate with higher added value, while reducing VOC emissions. Background technique

[0002] Both epichlorohydrin (ECH) and diallyl phthalate are important fine chemical products and organic intermediates with a ...

Claims

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