Magnetically-separable solid polymerization inhibitor as well as preparation method and application thereof

A polymerization inhibitor and a technology of polymerization inhibition, which are applied in chemical instruments and methods, purification/separation of hydrocarbons, separation/purification of carboxylic acid compounds, etc., can solve the problems of large environmental pollution and difficult separation of recycling, and achieve low synthesis cost , reduce the polymerization rate, the effect of little pollution

CN104447182AInactive Publication Date: 2015-03-25TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-03-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a solid polymerization inhibitor and mainly aims at solving the problems that self-polymerization is generated in unsaturated monomer storage and transportation processes, the process of removing the polymerization inhibitor is complex, monomers are easily consumed, the environment is polluted and the like. The polymerization inhibitor contains the following components: 5-95% of magnetic powder and 5-95% of a shell with connecting and polymerization inhibiting functions, wherein the shell is composed of 5-95% of a connecting component and 5-95% of a polymerization inhibiting component. The solid polymerization inhibitor disclosed by the invention is mainly used for solving the problems that self-polymerization is generated in unsaturated monomer storage and transportation processes, the process of removing the polymerization inhibitor is complex, monomers are easily consumed, the environment is polluted and the like; and the solid polymerization inhibitor can be applied to industrial production such as storage, transportation and recycling of various unsaturated hydrocarbons as well as rubber and resin monomers.
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Description

technical field

[0001] The invention relates to a solid-phase polymerization inhibitor for preventing the polymerization of unsaturated monomers, rubber and resin monomers, and belongs to the field of chemical synthesis. Background technique

[0002] For unsaturated monomers and rubber and resin monomers, when the external conditions are suitable, such as heat and light, self-polymerization is easy to occur during storage and transportation, which affects the purity and quality of the product. Therefore, in order to prevent the self-polymerization of these monomers, in addition to strictly controlling the process parameters in production, it is also necessary to add a certain proportion of polymerization inhibitors to reduce or prevent self-polymerization. At present, most of the polymerization inhibitors and monomers on the market are difficult to separate and recycle after they are evenly mixed, and the separation method is relatively complicated and poor in environmental ...

Examples

Embodiment 1

[0043] p-Hydroxybenzaldehyde inhibitor preparation method:

[0044]Disperse the magnetic powder in a chitosan solution with a mass fraction of 1.5%, add paraffin and ethyl acetate to make a fine emulsion, adjust the pH to 5, add formaldehyde as a cross-linking agent, adjust the pH to 9, and stir for 15 minutes to adjust the pH =5, add glutaraldehyde, adjust the pH=9, adjust the temperature to 30-80° C., and keep stirring for 1-12 hours to obtain chitosan-coated functionalized microspheres. Disperse chitosan functional microspheres containing amino groups on the surface in an aqueous solution, add p-hydroxybenzaldehyde, adjust pH=8 and temperature 45°C, and continue stirring for 6 hours to obtain the product.

[0045] Add 0.6 mg of the above-mentioned polymerization inhibitor to 3 grams of styrene system, and the composition of the polymerization inhibitor is: 50% gamma-Fe 3 o 4 , 40% linking component (35% chitosan oligosaccharide and 5% glutaraldehyde), 10% inhibitory compo...

Embodiment 2

[0049] Add 0.6 mg of the polymerization inhibitor described in this patent to 3 grams of styrene system, by weight percentage, the composition of the polymerization inhibitor is: 60% gamma-Fe 2 o 3 , 30% connection component (silane coupling agent KH550), 10% polymerization inhibitor component (p-hydroxybenzaldehyde), the implementation method is the same as in Example 1. The styrene polymerization rate was 0.5% by mass.

Embodiment 3

[0053] Add 0.6 mg of the polymerization inhibitor described in this patent to 3 grams of styrene system, by weight percentage, the composition of the polymerization inhibitor is: 40% gamma-Fe 2 o 3 , 40% linking component (L glutamic acid), 20% polymerization inhibitory component (p-Hydroxybenzaldehyde), implementation method is the same as embodiment 1. The polymerization rate of styrene was 0.3% by mass.