Mesostructured aluminosilicate alkylation catalysts for the production of aromatic amine antioxidants
作者:Y LIU
DOI:10.1016/j.jcat.2004.04.009
日期:2004.7
The conversion of diphenylamine (DPA) and α-methylstyrene (AMS) to the antioxidants mono- and dicumenyldiphenylamine was carried out over mesostructured aluminosilicate catalysts with hexagonal (2% Al-MCM-41), wormhole (2% Al-HMS), and lamellar/vesicular (2% Al-MSU-G) framework structures. A commercial acid-treated clay catalyst, Engelhard F-20, was included for comparison perposes. The yields of the
二苯胺(DPA)和α-甲基苯乙烯(AMS)向抗氧化剂单-和二枯烯基二苯胺的转化是在具有六角形(2%Al-MCM-41),虫孔(2%Al-HMS)和介孔结构的铝硅酸盐催化剂上进行的层状/囊状(2%Al-MSU-G)框架结构。为了比较目的,包括商业用酸处理的粘土催化剂Engelhard F-20。所需的抗氧化剂,即二枯烯基二苯胺(DCDPA)的产率按F-20(〜57%)<2%Al-MCM-41(〜85%)<2%Al-HMS,2%Al-MSU的顺序增加当在化学计量的反应条件下于90°C进行反应时,-G(〜90%)。用中型结构催化剂获得的DCDPA收率是该技术上重要的抗氧化剂迄今报道的最高值。杂多酸催化剂H 3还研究了负载在介孔虫HMS和层状/囊状MSU-G二氧化硅上的PW 12 O 40 · x H 2 O(PW 12)作为生产DCDPA的催化剂。然而,与介孔结构的铝硅酸盐催化剂相比,负载型催化