水热改性Hβ沸石催化合成乙基叔丁基醚

Synthesis of ethyl tertiary butyl ether with hydrothermal modification Hβ zeolite catalyst

以水热改性的Hβ沸石分子筛为催化剂,乙醇和叔丁醇为原料,合成乙基叔丁基醚(ETBE)。考察了水热改性条件对催化活性的影响,对醚化反应条件进行了优化,并考察了催化剂的运行稳定性。结果表明,沸水水热处理对Hβ沸石分子筛催化活性影响不大,而高温水热处理可使其催化活性明显提高,且经600℃水热处理的催化剂活性最高;以600℃水热处理的Hβ沸石分子筛为催化剂,在温度为105℃、空速为12 h-1的优化醚化反应条件下,产物中ETBE的质量分数达到37.06%,催化剂可稳定运行170 h。

Ethyl tertiary butyl ether(ETBE)was synthesized by reacting ethanol and tert-butyl alcohol over hydrothermal modification Hβ.The factors affecting catalyst activity in hydrothermal treatment were investigated,the etherification reaction conditions were optimized and the stability of the catalyst was studied.The results showed that the hydrothermal treatment with boiling water had little effect on the Hβ zeolite catalytic activity,the high-temperature hydrothermal treatment could markedly improve the catalyt...