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Super-strong multifunctional styrene polymerization inhibitor and its application method

A technology of polymerization inhibitor and styrene, applied in the field of super-strong multifunctional styrene polymerization inhibitor, can solve the problems of large amount of polymerization inhibitor, inconvenient use, and increased production cost of styrene.

Active Publication Date: 2016-05-25
北京斯伯乐科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the true polymerization inhibitor can prolong the induction period of the polymerization reaction, the reaction between the polymerization inhibitor and free radicals is consumed during the induction period, resulting in a shortened service life of the polymerization inhibitor
[0005] The above-mentioned polymerization inhibitors are all single-dose and single-function, which cannot meet the requirements of long-term stable operation of styrene plants
In recent years, some styrene plants have combined retarders and real inhibitors. Through the synergistic effect of each component, the inhibition efficiency has been improved, but there are also certain defects. First, it is inconvenient to use. Before use, it is necessary to compound the retarder and the real polymerization inhibitor on site. Secondly, the compounded polymerization inhibitor consumes a large amount and is expensive, which increases the production cost of styrene.

Method used

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  • Super-strong multifunctional styrene polymerization inhibitor and its application method

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Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0014] Under constant stirring, in terms of mass, the 2# solvent on the market (which is the product number, the main component is C 5 ~C 10 Hydrocarbons) were added to the A component and B component shown in Table 1 to make them evenly mixed to obtain the super multifunctional styrene polymerization inhibitor of the present invention.

[0015] Table 1: The components and proportions of the antioxidants of Examples 1-10 (the data in the table are all parts by mass)

[0016]

Embodiment 11

[0018] Add the polymerization inhibitor of Example 1 to the evaluation raw material at 500 ppm (the evaluation raw material is the crude styrene material that is actually prepared in industry and enters the rectification device. Its mass composition is: 0.6% benzene, 1.8% toluene, 0.2 % Xylene, 42% ethylbenzene, 54% styrene), at a temperature of 120°C and a pressure of 2.5Mpa, after 12 hours, the gum content is 1.1mg measured according to the GB / T509-88 standard / 100ml.

Embodiment 12

[0020] Add the polymerization inhibitor of Example 2 to the evaluation raw material at 250 ppm (the evaluation raw material is the crude styrene material that is actually prepared in industry and enters the rectification device. Its mass composition is: 0.6% benzene, 1.8% toluene, 0.2 % Xylene, 42% ethylbenzene, 54% styrene), after 12 hours at a temperature of 120°C and a pressure of 2.5Mpa, the gum content is 1.2mg according to the GB / T509-88 standard / 100ml.

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Abstract

The invention relates to a super-strong multifunctional styrene polymerization inhibitor and a using method thereof. The use of multifunctional polymerization inhibitors composed of quinone compounds and quinoline compounds can effectively prolong the running time of styrene plants, improve the output and quality of styrene products, reduce the discharge of tar from styrene plants, and at the same time protect the follow-up products The processing does not have any adverse effects, so that the production process of the styrene plant can obtain better economic benefits. The polymerization inhibitor of the invention has good polymerization inhibition effect, low cost, low viscosity, safety and environmental protection, and convenient use.

Description

technical field [0001] The invention relates to a super-strong multifunctional styrene polymerization inhibitor and a using method thereof. Background technique [0002] Styrene is an important basic raw material in the petrochemical industry and has a wide range of uses. It is mainly used in the production of styrene series resins and styrene-butadiene rubber. In addition, it can also be used in the production of benzene, dyes, pesticides and mineral processing. [0003] Styrene has the properties of vinyl olefins and is highly reactive. It can be polymerized at room temperature, and the higher the temperature, the faster the polymerization rate. In order to reduce the polymerization loss and polymerization fouling of styrene monomer during the styrene rectification process and ensure the normal operation of the rectification system, a polymerization inhibitor must be added during the rectification process. [0004] From the 1970s to the 1990s, nitrobenzene compounds have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/20C07C15/46
Inventor 刘宽胜何宏晓刘志远刘志清高志礼张丽欣王茜马维洁
Owner 北京斯伯乐科技发展有限公司