Styrene water-soluble synergic polymerization inhibitor and preparation method thereof

Abstract

The invention provides a styrene water-soluble synergic polymerization inhibitor. The inhibitor is composed of a solvent and effective components A and B. The solvent is a high-boiling-point alcoholic solution with the dilution effect and high solubility. The effective component A is one of 4-hydroxy-2,2,6,6-tetramethylpiperidinooxy and 4-oxo-2,2,6,6-tetramethylpiperidinooxy compounds; the effective component B is a succinimide compound. The mass content of the solvent is 60-65%, the mass content of the effective components is 35-40%, and the mass ratio of the component A to the component B in the effective components is (4-6):1. The styrene water-soluble synergic polymerization inhibitor is good in inhibition effect, small in kinematic viscosity, low in toxicity and convenient to store and convey, and has the good solubility in the styrene distillation process, the rectification yield of styrene can be effectively increased, and the inhibitor is better suitable for the industrial production requirement.

Description

technical field [0001] The invention relates to a styrene synergistic polymerization inhibitor and a preparation method thereof, in particular to a styrene water-soluble synergistic polymerization inhibitor used in the styrene rectification process and a preparation method thereof. Background technique [0002] A polymerization inhibitor is a compound that can prevent the polymerization of unsaturated hydrocarbons during processing, refining, storage and transportation. It can interact with free radicals in the system to form stable products, thereby preventing the occurrence of polymerization. Styrene monomer has the property of self-polymerization, and it can be polymerized at room temperature, and the higher the temperature, the faster the polymerization speed. In order to reduce the polymerization loss of styrene monomer during the styrene rectification process and ensure the normal operation of the rectification system, a polymerization inhibitor must be added during th...

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Problems solved by technology

However, hydroxylamine and thiamine inhibitors are used in the polymerization inhibitors, which have low boiling points and are easily volatile during rectification under negative pressure and high temperature, which will affect the quality of styrene products.

[0008] In 2011, Zhejiang Hanghua Science and Technology Co., Ltd. published a scale inhibitor for styrene rectification system (application number 201010600617.9). It was the first time that dispersant was used in styrene polymerization inhibitors, but there was poor compatibility between polymerization inhibitors 1. The polymerization inhibitor has poor compatibility with styrene, and the dispersant is selected from high-viscosity compounds such as macromolecular high-viscosity olefin or polyene succinimide, which will lead to high alkali-nitrogen value in recycled raw materials, which is not conducive to industrial production

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