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High-efficiency environmentally-friendly polymerization inhibitor of styrene

A high-efficiency polymerization inhibitor, styrene technology, used in the purification/separation of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problems of high requirements for polymerization inhibitors, improve the polymerization inhibition effect, and enhance the polymerization inhibition. effect, effect of reducing toxicity

Active Publication Date: 2011-11-23
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency and environment-friendly polymerization inhibitor for styrene and its use method, which mainly solves the problem of high requirements for the polymerization inhibitor in the refining of styrene under high temperature and negative pressure. Composite polymerization inhibitor with good solubility in ethylbenzene or styrene and good polymerization inhibition effect at high temperature to improve the yield of styrene distillation, reduce pollution and obtain better economic benefits

Method used

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  • High-efficiency environmentally-friendly polymerization inhibitor of styrene
  • High-efficiency environmentally-friendly polymerization inhibitor of styrene
  • High-efficiency environmentally-friendly polymerization inhibitor of styrene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve the composite inhibitor system into styrene to form a polymerization inhibitor solution, then add it to purified styrene, and react at 120°C. Take an appropriate amount of reaction solution at regular intervals and use the refractive index method to measure the viscosity of the polymer. Generation volume. The mass of each component of the inhibition system is 0.015 part of TEMPO, 0.0125 part of DEHA, 0.0125 part of DNBP and 0.01 part of PDOP (based on the mass of styrene St as 100 parts).

[0026] Reaction time / h

[0027] Note: TEMPO is 2,2,6,6-tetramethylpiperidine nitroxide; DEHA is N,N-diethylhydroxylamine; DNBP is 2,4-dimethyl-6-sec-butylphenol; PDOP is monophenyl diisooctyl phosphite

Embodiment 2

[0029] Dissolve the composite inhibitor system into styrene to form a polymerization inhibitor solution, then add it to purified styrene, and react at 120°C. Take an appropriate amount of reaction solution at regular intervals and use the refractive index method to measure the viscosity of the polymer. Generation volume. The mass of each component of the inhibition system is 0.015 part of TEMPO, 0.0125 part of DEHA, 0.0525 part of DNBP and 0.02 part of PDOP (based on the mass of styrene St as 100 parts).

[0030] Reaction time / h

[0031] Note: TEMPO is 2,2,6,6-tetramethylpiperidine nitroxide; DEHA is N,N-diethylhydroxylamine; DNBP is 2,4-dimethyl-6-sec-butylphenol; PDOP is monophenyl diisooctyl phosphite

Embodiment 3

[0033]Dissolve the composite inhibitor system into styrene to form a polymerization inhibitor solution, then add it to purified styrene, and react at 120°C, take an appropriate amount of reaction solution at regular intervals and use the refractive index method to measure the polymer Generation volume. The mass of each component of the inhibition system is 0.03 part of OH-TEMPO, 0.0125 part of DEHA, 0.0525 part of DNBP and 0.01 part of PDOP (based on the mass of styrene St as 100 parts).

[0034] Reaction time / h

[0035] Note: OH-TEMPO is 4-hydroxy-2,2,6,6-tetramethylpiperidine nitroxide radical; DEHA is N,N-diethylhydroxylamine; DNBP is 2,4-dimethyl-6 - sec-butylphenol; PDOP is monophenylene diisooctyl phosphite

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Abstract

The invention relates to a high-efficiency environmentally-friendly polymerization inhibitor of styrene, and a use method thereof. The compound polymerization inhibitor comprises nitroxide free radical compounds, hydroxylamine compounds, nitrophenol compounds and phosphite ester compounds. The compound polymerization inhibitor utilizes ingeniously synergistic effects of the above compounds, thus overcomes respectively defects of a retarder and an actual polymerization inhibitor and improves obviously polymerization inhibiting effects. Simultaneously, the compound polymerization inhibitor realizes that the use of high toxic substances is reduced; toxicity is reduced; the solubility in styrene or ethylbenzene is increased; and good economic benefits are obtained.

Description

technical field [0001] The invention relates to a high-efficiency polymerization inhibitor in the production process of styrene monomer and a method for using the same, which is especially suitable for the negative-pressure high-temperature refining process of styrene. Background technique [0002] Styrene is a basic raw material in petrochemical industry. It can be self-polymerized to produce polystyrene (PS) resin, and it is also easy to copolymerize with other unsaturated compounds containing double bonds. For example, styrene is copolymerized with butadiene and acrylonitrile, and its copolymer can produce ABS engineering plastics; it can be copolymerized with acrylonitrile into AS resin; it can be copolymerized with butadiene to produce latex (SBL) or synthetic rubber (SBR), and styrene can also be used Used to generate other resins; in addition, styrene is also widely used in pharmaceutical, paint, textile and other industries. [0003] Styrene has the properties of vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/46C07C7/20C07C7/05
Inventor 吴德荣陈丰秋张庆华洪纯芬周薇詹晓力葛春方
Owner CHINA PETROLEUM & CHEM CORP
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