考察了固定床反应条件下负载磷钨酸合成直链烷基苯的工艺条件。结果表明：它有两种酸中心，在150～160℃预处理后活性高，对原料中的水敏感；低温活性高，2位产物异构体选择性好，并且在实验室中具有较好的活性稳定性。

The reaction conditions of supported heteropoly acid catalyst was examined in a fixed-bed reactor.The result shows that the catalyst has two kinds of acid center, with high activity when pretreated in 150～160℃,and high sensitive to water, and can promote the alkylation reaction even in low temperature and produce more 2-phenylisomer. Furthermore, it has potential industrial utility due to its long catalytic stability.