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A kind of oxygen avoidance device for free radical polymerization reaction

A polymerization reaction and free radical technology, applied in chemical/physical/physical-chemical stationary reactors, chemical/physical/physical-chemical processes, chemical instruments and methods, etc., can solve the problems of insufficient deoxygenation and complicated operation, etc. Achieve the effect of low cost, simple operation and shortened induction period

Active Publication Date: 2022-03-08
MINJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an oxygen avoidance device for free radical polymerization, which is beneficial to solve the problems of insufficient oxygen removal and complicated operation

Method used

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  • A kind of oxygen avoidance device for free radical polymerization reaction
  • A kind of oxygen avoidance device for free radical polymerization reaction
  • A kind of oxygen avoidance device for free radical polymerization reaction

Examples

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Embodiment 1

[0027] Embodiment 1, reference figure 1 , Figure 3 to Figure 5

[0028] An oxygen avoidance device for free radical polymerization, comprising a magnetic stirrer 2 and an iron stand 1 arranged on one side of the magnetic stirrer, a constant temperature oil bath 3 is placed on the magnetic stirrer, and the constant temperature oil The bathing pot is provided with a reaction vessel 4 whose mouth is connected to the iron frame platform through the fixing clip 5. The reaction liquid is housed in the reaction vessel and is provided with a magnetic stirrer for stirring. The top of the reaction vessel is provided with three The opening 41 of the mouth is preferably a three-necked flask. The opening on the rightmost side of the reaction vessel is connected with a glass capillary 6 externally connected to an inert gas source. The other end of the glass capillary extends into the reaction vessel through the opening and the bottom is completely immersed in the reaction liquid to provi...

Embodiment 2

[0044] Embodiment 2, refer to Figure 2 to Figure 5

[0045] An oxygen avoidance device for free radical polymerization, comprising a magnetic stirrer 2 and an iron stand 1 arranged on one side of the magnetic stirrer, a constant temperature oil bath 3 is placed on the magnetic stirrer, and the constant temperature oil The bathing pot is provided with a reaction vessel 4 whose mouth is connected to the iron frame platform through the fixing clip 5. The reaction liquid is housed in the reaction vessel and is provided with a magnetic stirrer for stirring. The top of the reaction vessel is provided with two standard The opening 41 of the ground mouth is preferably a two-necked flask. The opening on the right side of the reaction vessel is connected with a glass capillary 6 externally connected to an inert gas source. The other end of the glass capillary extends into the reaction vessel through the opening and the bottom is completely immersed in the reaction liquid. An inert ga...

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Abstract

The present invention relates to the technical field of chemical experiment devices, in particular to an oxygen-shelter device for free radical polymerization, comprising a magnetic stirrer and an iron stand set on one side of the magnetic stirrer, on which a constant temperature Oil bath, the constant temperature oil bath is provided with a reaction vessel whose mouth is connected to the iron stand through a fixing clip, the reaction liquid is contained in the reaction vessel, and at least two standard grinding mouth One of the openings is connected to a glass capillary with one end connected to an inert gas source, the other end of the glass capillary extends into the reaction vessel through the opening and the bottom is completely immersed in the reaction liquid, and the other opening passes through the condenser tube, rubber The tube and the latex tube are connected with the U-shaped oil seal fixed on the iron stand. The device can effectively remove trace oxygen dissolved in the reaction liquid, shorten the induction period of free radical polymerization, improve the conversion rate of monomer, and has simple operation and low cost.

Description

technical field [0001] The invention relates to the technical field of chemical experiment devices, in particular to an oxygen avoidance device for free radical polymerization. Background technique [0002] Free radical polymerization is an important reaction in the synthesis of polymers, and about 60-70% of synthetic polymers are obtained through free radical polymerization. In free radical polymerization experiments, oxygen (from air) is easily mixed in the cavity space of the reaction vessel and the reaction liquid. A small amount of oxygen can inhibit the polymerization reaction, causing the polymerization to slow down until the polymerization stops completely. Therefore, free radical polymerization must be carried out under strict oxygen-avoiding conditions. There are many existing methods of oxygen avoidance experiments, such as the "freezing degassing and thawing method", which uses liquid nitrogen freezing - vacuuming - inert gas thawing to deoxygenate the reaction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/18B01J19/14B01J19/00C08F2/01C08F118/08
CPCB01J19/18C08F118/08C08F2/01B01J19/0013B01J19/0006B01J19/0053B01J19/14
Inventor 叶远松邓中文林生雄林棋方润
Owner MINJIANG UNIV
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