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A system device and method for continuous synthesis of methyltetrahydrophthalic anhydride

A technology of methyltetrahydrophthalic anhydride and system device, applied in chemical instruments and methods, feeding devices, organic chemistry and other directions, can solve the problems of long reaction time, poor product quality, many side reactions, etc., and achieves improved conversion rate, Realize the effect of recycling and shortening the reaction time

Active Publication Date: 2022-04-05
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there are many studies on the continuous production of methyltetrahydrophthalic anhydride, but the conversion rate of the reaction is low, the reaction time is long, the side reactions are many, and the product quality is poor.

Method used

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  • A system device and method for continuous synthesis of methyltetrahydrophthalic anhydride
  • A system device and method for continuous synthesis of methyltetrahydrophthalic anhydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] In this example, a system device provided in a specific embodiment is used to prepare methyltetrahydrophthalic anhydride. The preparation method specifically includes the following steps:

[0065] (I) the mixing C5 stored in the first storage tank 9 passes into the reaction solution channel through the feed pipe 10, and the maleic anhydride solution stored in the second storage tank 1 is divided into two strands, which are respectively the second reaction raw material and The second absorption raw material, the mass flow ratio of the second reaction raw material and the second absorption raw material is 1:1, the second reaction raw material is passed into the reaction liquid channel to form a Karman vortex street, and the second absorption raw material is passed into the mixing device 3;

[0066] (II) In the heat exchange medium channel and the inner pipe 13, the heat exchange medium is passed into, the mixed C5 is passed into the reaction liquid channel through the feed...

Embodiment 2

[0070] In this example, a system device provided in a specific embodiment is used to prepare methyltetrahydrophthalic anhydride. The preparation method specifically includes the following steps:

[0071] (I) the mixing C5 stored in the first storage tank 9 passes into the reaction solution channel through the feed pipe 10, and the maleic anhydride solution stored in the second storage tank 1 is divided into two strands, which are respectively the second reaction raw material and The second absorption raw material, the mass flow ratio of the second reaction raw material and the second absorption raw material is 2:1, the second reaction raw material is passed into the reaction liquid channel to form a Karman vortex street, and the second absorption raw material is passed into the mixing device 3;

[0072] (II) In the heat exchange medium channel and the inner pipe 13, the heat exchange medium is passed into, the mixed C5 is passed into the reaction liquid channel through the feed...

Embodiment 3

[0076] In this example, a system device provided in a specific embodiment is used to prepare methyltetrahydrophthalic anhydride. The preparation method specifically includes the following steps:

[0077] (I) the mixing C5 stored in the first storage tank 9 passes into the reaction solution channel through the feed pipe 10, and the maleic anhydride solution stored in the second storage tank 1 is divided into two strands, which are respectively the second reaction raw material and The second absorption raw material, the mass flow ratio of the second reaction raw material and the second absorption raw material is 3:1, the second reaction raw material is passed into the reaction liquid channel to form a Karman vortex street, and the second absorption raw material is passed into the mixing device 3;

[0078] (II) In the heat exchange medium channel and the inner pipe 13, the heat exchange medium is passed into, the mixed C5 is passed into the reaction liquid channel through the feed...

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Abstract

The invention provides a system device and method for continuously synthesizing methyltetrahydrophthalic anhydride. The system device includes a first storage tank, a second storage tank, a reaction device, a separation device and a mixing device; the first storage tank The tank is connected to the reaction device, and the bottom outlet of the second storage tank is divided into two paths, one of which is connected to the inlet of the reaction device, and the other is connected to the inlet of the mixing device, and the outlet of the mixing device is connected to the inlet of the second storage tank; The reaction device, the separation device and the mixing device are sequentially connected along the material flow direction, the first storage tank and the second storage tank respectively feed the first raw material and the second raw material into the reaction device, and the obtained reaction product enters the separation device, and the separation The tail gas obtained enters the mixing device, reacts with the second raw material fed into the mixing device from the second storage tank, and then reacts to realize tail gas absorption, and the obtained absorption product is returned to the second storage tank.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and relates to a system device and method for continuously synthesizing methyltetrahydrophthalic anhydride. Background technique [0002] As a derivative of maleic anhydride, methyltetrahydrophthalic anhydride is widely used in resin curing agents, electronics, high-grade polyester coatings, green plasticizers, pharmaceuticals and pesticides and other fields. The cured product formed by methyltetrahydrophthalic anhydride derivatives and epoxy resin is an ideal packaging material, which is widely used in basic electronic components such as resistors, capacitors, inductors, diodes, and triodes to complex devices such as semiconductor devices and integrated circuits. encapsulation. As an important chemical intermediate, the domestic demand for this product has been increasing in recent years. [0003] Methyltetrahydrophthalic anhydride was first produced by Dlels-Alder in 1928, using mal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/24B01J19/00B01J4/00C07D307/89
CPCB01J19/2415B01J19/00B01J19/0053B01J4/001C07D307/89
Inventor 周志茂
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI