Acetone was prepared from catalytic decomposition of tert-butyl hydrogen peroxide(TBHP),which was synthesized from isobutane and oxygen.The optimum reaction conditions,catalytic system,catalyst stability,recycling and the reason of catalyst deactivation in acetone synthesis were investigated.The results indicated that the acid property of catalysts had significant influence on reaction activity.β zeolite exhibited the best catalytic activity with TBHP conversion rate of 100%and the acetone selectivity of 49%.Within 28 h of the reaction cycle,the selectivity of acetone decreased significantly(decreased by 21%),indicating poor stability of the catalyst,but the multiple regeneration(5 times)activity could still be recovered.Catalyst pretreatment with different reaction products indicated that further reaction of acetone was the main reason for catalyst deactivation.After diluting TBHP with anhydrous ethanol,the stability of the reaction for 28 h was greatly improved,while the reaction performance and reusability of the catalyst were not affected.
关键词
叔丁基过氧化氢/催化分解/β分子筛催化剂/丙酮制备/稳定性/丙酮聚合/重复利用性
Key words
tert-butyl hydroperoxide/catalytic decomposition/β zeolite catalysts/synthesis of acetone/stability/acetone polymerization/reusability
维普
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