新型疏水性固体酸SBA-15-SO_3H催化剂制备及其催化性能  

Preparation and catalytic performance of a novel water-tolerant SBA-15-SO_3H solid acid catalyst

作　　者：张明伟[1] 王力[1] 高登征[1] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266510

出　　处：《工业催化》2008年第5期28-30,共3页Industrial Catalysis

摘　　要：采用水热法直接合成表面含丙磺酸基和不同烷基（如甲基、辛基和十六烷基）的疏水性介孔分子筛固体酸SBA-15-SO3H.实验表明，固体酸的硫质量分数为3．53％～4．255％，酸含量为（0．84～1．08）mmol·g^-1，相对润湿接触角θr（SBA-15SO3H）〈θr（CH3-SBA-15-SO3H）〈θr（C8H17-SBA-15-SO3H）〈θr（C16H33-SBA-15-SO3H）.催化剂对冰醋酸和正丁醇的酯化反应转化率可达75.5％，转化率随相对润湿角的增大而增大。Mesoporous water-tolerant molecule sieves SBA-15-SO3H, containing different alkyl （ methyl, octyt and cetyl） and sulfonic acid groups, were directly synthesized by hydrothermal method. The results showed that the contents of sulfur in samples were 3.53% -4. 255% （mass fraction）, and the acid amount were （0.84 - 1.08） mmol · g^- 1. The degrees of the relative wetting contact angles of four samples were-as follows： θr（SBA-15-SO3H） 〈 θr（CH3-3-SBA-15-SO3H） 〈 θr（C8H17-SBA-15-SO3H） 〈 θr（C16H33-SBA-15-SO3H）· In the estefification react＇ion of acetic acid with n-butanol, the conversion of acetic acid over C16H33-SBA-15-SO3H solid acid catalyst was up to 75.5%. Moreover, the catalytic activity increased with increase of the degrees of the relative wetting contact angles of the catalysts.

关 键 词：催化化学 SBA-15分子筛 疏水性固体酸催化剂 磺酸 乙酸正丁酯 

分 类 号：TQ426.94[化学工程] O643.36[理学—物理化学]