Polymerization inhibitor suitable for vinyl aromatic compound

A vinyl aromatic and polymerization inhibitor technology, applied in the field of polymerization inhibitors, can solve the problems of high requirements for polymerization inhibitors, and achieve the effects of high polymerization inhibition efficiency, low cost, and extended running time
CN101857519AActive Publication Date: 2010-10-13ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2010-10-13

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Abstract

The invention discloses a polymerization inhibitor suitable for a vinyl aromatic compound, which can be applied in the processes of production, treatment, transportation and utilization of vinyl aromatic compounds. The compounded polymerization inhibitor is composed of an oxime compound, a nitrophenol compound and a nitroxide free radical compound and skilfully utilizes the respective advantages of a true polymerization inhibitor and a retarder; the synergy of components obviously improves inhibition effect, reduces use amount of highly toxic substances, lowers toxicity, improves solubility in the organic solvent and obtains good economic benefit.
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Description

technical field

[0001] The invention relates to a polymerization inhibitor, in particular to a high-efficiency composite polymerization inhibitor used in the production, handling, transportation and use of vinyl aromatic compounds. technical background

[0002] Vinyl aromatic compounds such as styrene, α-methylstyrene and other lower alkylated styrenes contain many impurities such as benzene and toluene in the industrial production process, and they must be purified to remove them before they are used as monomers. In addition to these impurities, the purification method is generally completed by rectification.

[0003] However, it is well known that vinyl aromatic compounds are highly reactive and can undergo self-polymerization at room temperature. They will polymerize in all stages of their refining, storage and use, and the polymerization rate increases rapidly with the increase of temperature, which will lead to single Body loss, pipeline blockage, resulting in higher m...

Claims

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