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Polymerization inhibitor adding device for inhibiting pipeline polymerization reaction

A polymerization reaction and adding device technology, applied in the separation/purification of carbonyl compounds, organic chemistry, etc., can solve problems such as pipeline polymerization blockage

Active Publication Date: 2019-10-25
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, a method of adding a polymerization inhibitor to inhibit the polymerization reaction of the pipeline is mentioned, which solves the problem that the pipeline is prone to polymerization and blockage, and can study the macroscopic changes of the pipeline polymerization under different reaction conditions

Method used

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  • Polymerization inhibitor adding device for inhibiting pipeline polymerization reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the polymerization experiment of independent evaporation polymerization product, as figure 1 As shown, the heating temperature of the evaporation tank is 90°C, the flow rate of the evaporation gas in the evaporation tank is kept at 10 L / min, and the flow rate is controlled by a valve. The evaporation gas source of the evaporating tank flows through the mixing tank and is connected to the polymerization glass tube through a Φ6 tetrafluoro tube, and the temperature of the glass tube oil bath is 160°C. Observe the polymerization phenomenon, and through the time-lapse video observation, the obvious polymerization time is 7h.

Embodiment 2

[0028] Embodiment 2: Polymerization experiment connected with the production pipeline, the pipeline gas source flow is controlled by a valve, the flow is 10L / min, the polymerization inhibitor is an aqueous solution of hydroquinone, the feed flow is 10ul / min, and the argon flow is 1L / min , the atomized gas of hydroquinone and the gas source of the production pipeline are mixed evenly in the mixing tank and then connected to the polymerization glass tube through the Φ6 PTFE tube. The temperature of the glass tube oil bath is 160 ° C. Through time-lapse video observation, within 3 days No apparent polymerization occurred.

Embodiment 3

[0029] Example 3: Polymerization experiment of independently evaporating polymerization products. The heating temperature of the evaporation tank was 90° C., and the flow rate of the evaporation gas in the evaporation tank was kept at 6 L / min, and the flow rate was controlled by a valve. The polymerization inhibitor is methyl hydroquinone ethanol solution, the feed flow rate is 2ul / min, and the argon gas flow rate is 1L / min. After being mixed evenly by the mixer, it is passed into the glass reaction tube. Polymerization in the tube, no obvious polymerization was found within 3 days.

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Abstract

The invention discloses a polymerization inhibitor adding device for inhibiting pipeline polymerization reaction. Based on a production process of methacrolein, a set of polymerization inhibitor adding device composed of four parts of an evaporation feeding system, a polymerization inhibitor feeding system, a heat preservation jacket glass reaction pipe and a condensation collection device is designed. In particular, an adding method of a polymerization inhibitor is mentioned. According to the method, the polymerization inhibitor is added in the way of atomization to form aerosol which is fully mixed with polymerization gas, the same polymerization inhibition effect with less dosage as a traditional polymerization inhibitor can be achieved, and the problem of production capacity reductionor even shutdown caused by pipeline blockage is solved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polymerization inhibitor adding device for suppressing pipeline polymerization reaction. Background technique [0002] During the storage, transportation and production of polymers, it is often accompanied by further polymerization. In order to prevent the adverse effects of polymerization, a polymerization inhibitor will be added during storage and transportation to inhibit the occurrence of polymerization. There have been many patent reports on related aspects, and many researchers have carried out a series of research on the development of polymerization inhibitors. There are different types of single polymerization inhibitors, compound polymerization inhibitors, ionic liquid polymerization inhibitors and so on. However, there are few reports on how to solve the polymerization problem generated in the production process. [0003] The generation of polymers in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/86C07C47/22
CPCC07C45/86C07C47/22
Inventor 张锁江闫瑞一郭立杰吕兆坡马冬菊李增喜
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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