The novel type of solid acid catalyst was prepared by treating active white earth with H 3PW 12 O 40 and was applied to dehydration of 1,4 butanediol to tetrahydrafuran by continuous flow type gas solid reaction.Excel...The novel type of solid acid catalyst was prepared by treating active white earth with H 3PW 12 O 40 and was applied to dehydration of 1,4 butanediol to tetrahydrafuran by continuous flow type gas solid reaction.Excellent catalytic activity was found and the yield of tetrahydrafuran could be over 96%.The effect of reaction dynamic conditions on catalytic activity and tetrahydrafuran yield was investigated and the optimum reaction conditions of obtaining tetrahydrafuran was found.展开更多
以十二胺(DDA)为模板剂,利用杂原子掺杂技术合成了Cs-HMS载体。以n-丁醇为溶剂,按照Cs/磷钨酸(HPW)摩尔比为1.5,等体积浸渍法制备了负载HPW的催化剂HPW/Cs-HMS,并对载体及催化剂进行了表征分析,考察了负载量对催化剂结构及其醋酸甲酯(Me...以十二胺(DDA)为模板剂,利用杂原子掺杂技术合成了Cs-HMS载体。以n-丁醇为溶剂,按照Cs/磷钨酸(HPW)摩尔比为1.5,等体积浸渍法制备了负载HPW的催化剂HPW/Cs-HMS,并对载体及催化剂进行了表征分析,考察了负载量对催化剂结构及其醋酸甲酯(MeOAc)水解性能的影响。结果发现,随着HPW负载量的增加,Cs-HMS介孔结构的规整度、比表面积及孔容显著下降,其结构及形貌由短程有序的球状介孔逐渐转化为无序的片状微孔,最佳的HPW负载量为40%。40%HPW/Cs-HMS在55℃、9 g H2O、m(H2O)/m(MeOAc)=1、HPW总用量为1 g的条件下,反应2 h后,MeOAc转化率为45.7%,并具有优良的耐温性。在100℃、4.5 g H2O、18 gMeOAc、HPW总用量为0.5 g的条件下,反应0.5 h,MeOAc转化率为21.8%,比相同条件下酸性树脂NKC-9的活性高5%,重复使用5次,活性维持在20.8%,而NKC-9则逐次失活。展开更多
文摘The novel type of solid acid catalyst was prepared by treating active white earth with H 3PW 12 O 40 and was applied to dehydration of 1,4 butanediol to tetrahydrafuran by continuous flow type gas solid reaction.Excellent catalytic activity was found and the yield of tetrahydrafuran could be over 96%.The effect of reaction dynamic conditions on catalytic activity and tetrahydrafuran yield was investigated and the optimum reaction conditions of obtaining tetrahydrafuran was found.
文摘以十二胺(DDA)为模板剂,利用杂原子掺杂技术合成了Cs-HMS载体。以n-丁醇为溶剂,按照Cs/磷钨酸(HPW)摩尔比为1.5,等体积浸渍法制备了负载HPW的催化剂HPW/Cs-HMS,并对载体及催化剂进行了表征分析,考察了负载量对催化剂结构及其醋酸甲酯(MeOAc)水解性能的影响。结果发现,随着HPW负载量的增加,Cs-HMS介孔结构的规整度、比表面积及孔容显著下降,其结构及形貌由短程有序的球状介孔逐渐转化为无序的片状微孔,最佳的HPW负载量为40%。40%HPW/Cs-HMS在55℃、9 g H2O、m(H2O)/m(MeOAc)=1、HPW总用量为1 g的条件下,反应2 h后,MeOAc转化率为45.7%,并具有优良的耐温性。在100℃、4.5 g H2O、18 gMeOAc、HPW总用量为0.5 g的条件下,反应0.5 h,MeOAc转化率为21.8%,比相同条件下酸性树脂NKC-9的活性高5%,重复使用5次,活性维持在20.8%,而NKC-9则逐次失活。
