Styrene water-soluble synergic polymerization inhibitor and preparation method thereof

A polymerization inhibitor and water-soluble technology, applied in the field of styrene water-soluble synergistic polymerization inhibitor and its preparation, can solve the problem of poor compatibility between the polymerization inhibitor and styrene, affecting the quality of styrene products, and poor compatibility of the polymerization inhibitor. and other problems, to achieve the effect of promoting mixing and mutual solubility, preventing fouling, and good wetting performance

Active Publication Date: 2017-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Styrene water-soluble synergic polymerization inhibitor and preparation method thereof
  • Styrene water-soluble synergic polymerization inhibitor and preparation method thereof
  • Styrene water-soluble synergic polymerization inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the components and dosage shown in Table 1, use 2-(2-butoxyethoxy)ethanol and water to configure 2-(2-butoxyethoxy)ethanol solution as a solvent, use component A and group Part B configures the main body of the polymerization inhibitor, add the prepared solvent to the prepared main body of the polymerization inhibitor dropwise, and stir evenly at 30-35°C to obtain a clear and transparent liquid that is a styrene water-soluble synergistic polymerization inhibitor.

Embodiment 2-8

[0031] The components and dosage are shown in Table 1, and the configuration steps are the same as in Example 1.

[0032] Table 1

[0033]

Embodiment 9～24

[0035]The styrene water-soluble synergistic polymerization inhibitor that embodiment 1-8 makes is added respectively in styrene according to the dosage shown in table 2, after mixing evenly, inject rectification column bottom through metering pump, in vacuum degree 40~42 kilopascals , Rectification under the condition of rectification tank bottom temperature 118~120℃. Styrene is continuously extracted from the top of the rectification tower, and refluxed to the feed port in the middle of the rectification tower for circular rectification. Under these conditions, the reaction was stable for 4 hours, and the content of styrene polymer in the rectification kettle was measured, and the results are shown in Table 2.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/20C07C7/05C07C15/46
CPCC07C7/05C07C7/20C07C15/46
Inventor 刘宇李正张正春王军王静涛贾洪义张冠英曹兵霍其雷李风雷梁作栋李伟
Owner PETROCHINA CO LTD
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