作　　者： ; ; ;

机构地区： 暨南大学生命科学技术学院化学系

出　　处： 《应用化学》 2004年第4期343-347,共5页

摘　　要： 采用固定床反应器,研究了常压下铜铬系催化剂对1,4-丁二醇气相脱氢制γ-丁内酯的催化性能,考察了反应条件对催化性能的影响。结果表明,添加Ca、Ba助剂的Cu-Cr催化剂在180～200℃,液时空速0.3～0.7 h^(-1),氢醇摩尔比15～30的条件下,1,4-丁二醇转化率≥199.9％,γ-丁内酯产率≥96％。通过XRD和TG/DTG表征发现,Cu^0为催化剂的活性中心,Cr的存在促进了Cu的高度分散,提高了催化剂的活性及选择性。助剂Ca和Ba的加入,降低了催化剂的还原温度,提高了γ-丁内酯的产率。 The dehydrogenation of 1,4-butanediol to γ-butyrolactone over copper-chromite catalysts at atmospheric pressure has been carried out in a fixed-bed reactor.The effects of reaction conditions on the performance of catalyst have been investigated. The results show that for Cu-Cr-Ca-Ba catalyst the conversion of 1, 4-butanediol is ≥99.9% and the yield of γ-butyrolactone is ≥ 96% under the conditions : LHSV 0. 3～0. 7 h^(-1), reaction temperature 180～200℃ and n(H_2 )/n(BDO) 15～30. The XRD and TG-DTG characterization results show that Cu^0 is the active site of the catalyst in dehydrogenation and the presence of Cr is in favor15 of high dispersion of Cu, which results in increasing of the dehydrogenation activity and selectivity. Addition of Ca and Ba as promoters let the reaction temperature reduce to a lower degree and led to an increased yield of γ-butyrolactone.

关 键 词： 丁二醇 气相脱氢 丁内酯 催化剂

领　　域： [理学] [理学]