MCM-48分子筛负载磷钨钼杂多酸催化合成丁酮1,2-丙二醇缩酮

Catalytic synthesis of butanone 1,2-propanediol ketal by H₃PW₆Mo₆O₄₀/MCM-48

摘要: 以MCM-48分子筛负载磷钨钼杂多酸为多相催化剂,通过丁酮和1,2-丙二醇反应合成丁酮1,2-丙二醇缩酮.采用正交试验法探讨了MCM-48分子筛负载磷钨钼杂多酸对缩酮反应的催化活性,较系统地研究了原料用量、催化剂用量、带水剂用量、反应时间等因素对收率的影响.结果表明:MCM-48分子筛负载磷钨钼杂多酸是合成丁酮1,2-丙二醇缩酮的良好催化剂,在n(丁酮):n(1,2-丙二醇)=1:1.4,催化剂用量为反应物料总质量的0.2%,环己烷为带水剂,反应时间1.0h的条件下,丁酮1,2-丙二醇缩酮的收率可达81.0%.

Abstract: Butanone 1,2-pmpanediol ketal was synthesized from butanone and 1,2-propanediol in the presence of H₃PW₆Mo₆O₄₀/MCM-48. The effects of the molar ratio of hutanone to 1,2-propanediol, catalyst dosage and reaction time on the yield of hutanone 1, 2-propanediol ketal were investigated. The catalytic activity of H₃PW₆Mo₆O₄₀/MCM-48 was discussed by the orthogonal experiment. The results show that H₃PW₆Mo₆O₄₀/MCM-48 is an excellent catalyst for synthesizing butanone 1,2-propanediol ketal and the yield can be up to reach 81.0% under the condition that the molar ratio of butanone to 1,2-propanediol is 1:1.4, the mass percent of catalyst is 0.2% of feed stocks, and the reaction time is 1.0h.