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Method for continuously producing diisobutyryl peroxide through multipoint feeding and reinforced mixing

A diisobutyryl peroxide, mixed continuous technology, applied in the preparation of peroxy compounds, chemical instruments and methods, preparation of organic compounds, etc. The problems such as the increase of inventory, etc., can achieve the effect of reducing the side reaction of acid chloride easy to hydrolyze, improving the mixing performance, and avoiding batch stability.

Inactive Publication Date: 2020-04-28
YUNNAN ZHENGBANG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

IBP is also a D-type liquid organic peroxide with poor thermal stability. It can undergo self-accelerated decomposition at 0°C and is prone to explosion.
The raw material isobutyryl chloride of synthesizing IBP is easy hydrolysis in addition, and hydrolysis is more rapid under alkaline condition, is unfavorable for the raising of IBP yield
[0003] At present, the industrial method of synthesizing IBP is the intermittent synthesis in stirred reactor, can emit a large amount of heat of reaction in synthesis, in order to remove heat in time, dropwise reaction time is long; One-time adding of alkali makes isobutyryl chloride hydrolysis side reaction more ;In the late stage of the reaction, the stock of IBP in the stirred tank increases, and there is a great risk of IBP decomposition and explosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for continuously producing diisobutyryl peroxide with multi-point feeding and intensive mixing, comprising the steps:

[0027] (1) The concentration is 20% hydrogen peroxide aqueous solution (through 1# metering pump, volume flow is set to 9.7ml / min) and concentration 5% sodium hydroxide aqueous solution stream 1 (through 2# metering pump, volume flow is set to 41.7 ml / min), open 1# and 2# metering pumps at the same time, so that aqueous hydrogen peroxide and sodium hydroxide aqueous solution are passed into 1# and 2# metering pumps respectively, and continuously enter the first flow reactor (microchannel reactor) Carry out the salt-forming reaction at -10°C for 120s;

[0028] (2) The reaction solution that step (1) obtains and the concentration that adds continuously are 70% isobutyryl chloride toluene solution stream 1 (the adding of isobutyryl chloride toluene solution is through 3# metering pump, and volumetric flow rate is 6.8ml / min) In the second flow re...

Embodiment 2

[0035] A method for continuously producing diisobutyryl peroxide with multi-point feeding and intensive mixing, comprising the steps:

[0036] (1) The concentration is 10% hydrogen peroxide aqueous solution (through 1# metering pump, volume flow is set to 11.9ml / min) and concentration 30% sodium hydroxide aqueous solution stream 1 (through 2# metering pump, volume flow is set to 27.0 ml / min), open 1# and 2# metering pumps at the same time, so that hydrogen peroxide aqueous solution and sodium hydroxide aqueous solution are passed into 1# and 2# metering pumps respectively, and continuously enter the first flow reactor (high shear reactor ) at 0°C for 300s to form a salt;

[0037] (2) The reaction solution that step (1) obtains and the concentration that adds continuously are 30% isobutyryl chloride xylene solution stream 1 (the adding of isobutyryl chloride xylene solution is through 3# metering pump, and volume flow rate is 46.2ml / min) in the second flow reactor (microchann...

Embodiment 3

[0044] A method for continuously producing diisobutyryl peroxide with multi-point feeding and intensive mixing, comprising the steps:

[0045] (1) Concentration is 50% hydrogen peroxide aqueous solution (through 1# metering pump, volume flow is set to 2.2ml / min) and concentration 5% potassium hydroxide aqueous solution stream 1 (through 2# metering pump, volume flow is set to 50.0 ml / min), open 1# and 2# metering pumps simultaneously, make described hydrogen peroxide aqueous solution and potassium hydroxide aqueous solution, pass into 1# and 2# metering pumps respectively, enter the first flow reactor (microtube reaction) continuously Carry out the salt-forming reaction at -20°C for 600s;

[0046] (2) the reaction solution that step (1) obtains and continuous adding concentration are 30% isobutyryl chloride isododecane solution (also can adopt concentration and be 30% isobutyryl chloride cyclohexane solution) stream 1 (isobutyryl chloride cyclohexane solution) The addition of...

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PUM

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Abstract

The invention discloses a method for continuously producing diisobutyryl peroxide by multi-point feeding and enhanced mixing. The method comprises the following steps: (1) continuously feeding a hydrogen peroxide aqueous solution and an alkaline aqueous solution stream 1 into a first flow reactor to carry out salt forming reaction; (2) reacting the reaction solution obtained in the step (1) and acontinuously added isobutyryl chloride solution stream 1 for generating IBP in a second flow reactor; (3) feeding the reaction solution obtained in the step (2) and a continuously added aqueous alkalistream 2 into a third flow reactor for salt forming reaction; and (4) reacting the reaction solution obtained in the step (3) and the continuously added isobutyryl chloride solution stream 2 for generating IBP in a fourth flow reactor; wherein the IBP is abbreviation of diisobutyryl peroxide. According to the method disclosed by the invention, side reactions such as acyl chloride hydrolysis can be obviously reduced, the IBP yield is improved, and reaction heat is removed in time, so that the whole reaction is carried out under safe and environment-friendly continuous conditions.

Description

technical field [0001] The invention provides a method for preparing a polymer synthesis initiator diisobutyryl peroxide (IBP), in particular relates to a method for continuously producing IBP with multi-point feeding and intensive mixing, and belongs to the technical field of initiator production. Background technique [0002] IBP is a new type of polymerization initiator, which has the characteristics of high oxygen content and good low temperature activity. It is mainly used as an initiator for the synthesis of high molecular polymers in polyvinyl chloride, polyethylene, plexiglass and other industries. IBP is also a type D liquid organic peroxide, which has poor thermal stability and can undergo self-accelerated decomposition at 0°C, and is prone to explosion. In addition, the raw material isobutyryl chloride for synthesizing IBP is easy to hydrolyze, and the hydrolysis is more rapid under alkaline conditions, which is unfavorable for the improvement of IBP yield. [00...

Claims

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Application Information

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IPC IPC(8): C07C407/00C07C409/34
CPCC07C407/00C07C409/34
Inventor 张金利杨琳何木川王寿元董灿生张存皓邹倩周文黄洪
Owner YUNNAN ZHENGBANG SCI & TECH
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