王晓.催化羟基化制备2,5-二甲基苯酚的研究[J].分子催化,2011,(3):244-249
催化羟基化制备2,5-二甲基苯酚的研究
Research on the Preparation of 2,5-Dixylenol by Catalytic Hydroxylation
投稿时间:2011-04-27  修订日期:2011-06-07
DOI:
中文关键词:  颜料绿8  羟基化  对二甲苯  H2O2  2, 5-二甲基苯酚
英文关键词:C.I. Pigment Green 8, Hydroxylation, p-Xylene, H2O2, 2,5-Xylenol
基金项目:天津市应用基础研究计划(07JCZDIC01700)
作者单位E-mail
王晓* 天津大学化工学院 ujn_wangxiao@163.com 
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中文摘要:
      由2-萘酚经亚硝化、加成、络合、中和反应合成了C.I.颜料绿8(简称PG8)。考察了对二甲苯/H2O2直接羟基化制备2, 5-二甲基苯酚反应中PG8催化性能。结果表明该催化剂具有一定的催化活性。研究了催化剂用量、反应温度、反应时间、反应物摩尔比、溶剂等对催化剂活性的影响。20.0mL乙腈溶剂,0.1g催化剂,H2O2与对二甲苯摩尔比为5,温度60℃,反应5h,对二甲苯的转化率达到55.9%,2, 5-二甲基苯酚的收率达到10.1%。
英文摘要:
      After nitrosation, addition, complexing and neutrallization reaction of 2-naphthol, C.I. Pigment Green 8(PG8) was synthesized. Catalytic hydroxylation of p-xylene catalyzed by PG8 in the presence of H2O2 was studied. PG8 has catalytic activity for the hydroxylation of p-xylene. Effects of catalyst dosage, reaction temperature, reaction time, solvents, and mole ratio of H2O2 to p-xylene on the hydroxylation were determined. Under the conditions: 20.0mL acetonitrile as the solvent, 0.1g PG8 as the catalyst, n(H2O2):n(p –xylene) = 5, reaction temperature 60℃, reaction time 5h, conversion of p-xylene is 55.9% with a yield of 2,5-xylenol 10.1%.
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