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二芳基乙烷是一种无色、无味、无毒的高沸点溶剂,在相容性、热阻、润滑性和电性能方面有优良的性能,广泛用作增塑剂、高沸点溶剂、热介质、电气绝缘油和润滑油。本文制备了SO42-/WO3/ZrO2固体超强酸催化剂用于烷基化反应制备二芳基乙烷,研究了原料配比、催化剂用量、反应压力、反应温度等对产品产率的影响。结果表明,在反应温度100℃,反应压力3MPa,苯乙烯和二甲苯原料摩尔比1:7,催化剂用量为1.25g的优化条件下,二芳基乙烷产率最高,可以达到93%。研究发现该催化剂具有较好的催化活性和较好的重复利用性。
Diarylethane is a colorless, tasteless, non-toxic high-boiling point solvent with excellent properties in terms of compatibility, thermal resistance, lubricity and electrical properties. It is widely used as a plasticizer, a high boiling point solvent, Thermal media, electrical insulating oils and lubricants. In this paper, SO42- / WO3 / ZrO2 solid superacid catalysts were prepared for the alkylation reaction to produce diarylethane. The effects of raw material ratio, catalyst dosage, reaction pressure and reaction temperature on the yield of the product were studied. The results showed that the yield of diarylethane reached 93% under the optimal reaction conditions of reaction temperature of 100 ℃, reaction pressure of 3 MPa, molar ratio of styrene to xylene of 1: 7 and catalyst dosage of 1.25 g. The study found that the catalyst has good catalytic activity and good reusability.