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OALib Journal期刊
ISSN: 2333-9721
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ru/al2o3催化对苯二甲酸二甲酯合成1,4-环己烷二甲酸二甲酯
DOI: 10.3969/j.issn.1671-7627.2015.04.001, PP. 1-5
Keywords: 对苯二甲酸二甲酯,1,4-环己烷二甲酸二甲酯,催化加氢,ru/al2o3
Abstract:
以al2o3为载体、ru为活性组分合成ru/al2o3。以ru/al2o3为催化剂,在反应釜中液相催化加氢催化对苯二甲酸二甲酯(dmt)制备1,4-环己烷二甲酸二甲酯(dmcd),考察ru负载量、反应温度、压力、搅拌速率和反应时间对dmt加氢反应性能的影响。采用x线衍射仪(xrd)、n2吸附-脱附仪、h2-程序升温脱附(h2-tpd)技术和扫描电子显微镜(sem)对催化剂理化性能进行表征。结果表明:ru质量分数为3%的ru/al2o3显示出良好的催化活性。适宜催化剂的活化温度为120℃,在95℃、4.5mpa和搅拌速率1200r/min的条件下加氢反应3h,dmt转化率和dmcd选择性分别高达100%和98.81%。该催化剂循环使用12次后仍未发现明显失活。
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