碳六烯烃异构化制备2,3-二甲基-2-丁烯

通过 1 己烯异构化反应的固体酸分子筛催化剂的研究 ,发现ZSM 35和SAPO 11分子筛催化剂具有很好的 1 己烯异构化生成 2 ,3 二甲基 2 丁烯催化反应性能。SAPO 11分子筛上当1 己烯反应空速从 0 2h-1增加到 2 0h-1时 ,2 ,3 二甲基 2 丁烯收率从 5 0 8%降到 0 2 1% ,表明 1 己烯异构生成 2 ,3 二甲基 2 丁烯是慢反应。以工业混合碳六烯烃为原料在t =2 70℃ ,p=0 2MPa ,WHSV =1 0h-1,n(H2 )∶n(碳六烯烃 ) =2∶1反应条件下 ,考察SAPO 11分子筛催化剂用于混合碳六烯烃异构的反应性能 ,在 4 6h的反应过程中 ,2 ,3 二甲基 2 丁烯的收率保持在 8 5 %～ 10 % ,产生的裂解产物和聚合产物收率低于 1%。

Isomerization of Hexenes to 2,3-Dimethyl-2-butene

Several zeolite catalysts were selected to convert 1 hexene to 2,3 dimethyl 2 butene (DMB 2) in this work.ZSM 35 and SAPO 11 zeolite are suitable skeletal isomerization catalysts.The effect of space velocity on the performance of skeletal isomerization of 1 hexene to DMB-2 over SAPO 11 catalyst shows this is a slow reaction.Under the reaction conditions: t =270 ℃, p =0 2 MPa,WHSV=1 0 h -1 , n (H 2)∶ n (hexenes)=2∶1,when the feed is the mixture of hexenes,the yield of DMB-2 remains between 8 5% and 10% with trace amount (<1%) of cracking and polymerization products at the prolonged time on stream of 46 h.