微波法合成含磷MCM-41分子筛及催化性能研究

采用微波法合成了含磷MCM-41分子筛。运用XRD、SEM、NH3-TPD、BET、NMR手段对合成的分子筛进行表征。结果表明，该分子筛主要有弱酸和中强酸中心，无强酸中心，酸量为0.349 ~0.553 mmol/g；磷原子已经成功进入了分子筛的骨架结构。分别选用1，3，5-三异丙基苯和正十四烷作为反应物，使用自动微反装置，对分子筛进行催化活性的评价。结果表明，采用含磷MCM-41分子筛为催化剂，1，3，5-三异丙基苯的转化率为87.1%，正十四烷的转化率为56.2%，均高于MCM-41分子筛为催化剂时的转化率。

STUDY ON THE SYNTHESIS OF MCM-41 CONTAINING P AND ITS CATALYTIC PERFORMANCE

MCM-41 molecular sieve containing P was synthesized by microwave radiation and characterized by XRD, SEM, NH3-TPD, N2 adsorption and NMR. Results showed that said molecular sieve mainly possessed weak acid sites and medium strong acid sites without strong acid sites, the total acidity was among 0.349~0.553 mmol•g-1. The 31P MAS NMR data suggested that phosphorus atoms were successfully incorporated into the framework of MCM-41. The catalytic performance of the MCM-41 containing P was evaluated by micro reactor using 1,3,5-triisopropylbenzene and n-tetradecane as reactants. Test results showed that compared with MCM-41, MCM-41 containing P exhibited higher catalytic activity, its conversion of 1,3,5-triisopropylbenzene was 87.1% and conversion of n-tetradecane was 56.2%.