摘要
用水蒸气处理β沸石作催化剂 ,在 10 0 cm3 间歇高压反应器中研究了甲醇与异丁烯合成甲基叔丁基醚的反应。反应条件 :温度为 70～ 10 0℃ ;压力为 1.5 MPa;醇 /烯摩尔比为 3.73;催化剂用量为 2 .0 g/ mol。结果表明 ,5 5 0℃预处理和 35 0℃、3h水蒸气处理有利于提高沸石的催化活性 ;碱性气氛较中性气氛下处理催化活性高 ;醚化反应的最佳温度为 90℃ ;
The catalytic activity of zeolite β by steam treating on the liquid-phase synthesis of methyl tertiary butyl ether (MTBE) from methanol and isobutene was studied in a batch reactor in the temperature range 343 [similar to] 373K at 1.5MPa. A initial molar ratio of 3.73 (methanol/isobutene) was used in experiments. It was shown that the calcination temperature and conditions of steam treatment have a marked influence on the activity for MTBE formation. The optimum treatment conditions by steaming were 350°C and 3 hours. The pretreatment temperature of 550°C helps improving conversion of isobutene. Reaction temperature could effect the catalytic characteristics. The maximum activity of different samples was achieve at 90°C. The zeolite β exhibited both high conversion of isobutene and high selectivity to MTBE. The selectivity to MTBE was close to 100% and the highest conversion of isobutene was 92% on optimum conditions.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2001年第1期35-38,54,共5页
Chemical Reaction Engineering and Technology
基金
中国石油化工总公司资助 !(X5 96 0 40 )
