钙改性MCM-22分子筛催化剂上单十二烷基磷酸酯的绿色合成  

Green synthesis of monododecylphosphate over MCM-22 molecular sieve modified by calcium

作　　者：张文飞[1] 梁金花[2] 李宁[1] 刘艳秋[1] 任晓乾[1] 姜岷[2] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009 [2]南京工业大学生物与制药工程学院,江苏南京210009

出　　处：《化工学报》2013年第3期949-954,共6页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2009CB724701)~~

摘　　要：引言单十二烷基磷酸酯（MAP）是一类应用较广的阴离子表面活性剂，通常由长链醇和磷酰化剂反应制得[1]。采用等摩尔比磷酸法制备烷基磷酸单酯是一条绿色的合成路线[2]，但是由于磷酸浓度低，反应活性不高，一般使用催化剂来加快反应[3-6]，但是其合成是一种大分子反应，且反应过程中伴随相应的双十二烷基磷酸酯的生成，选择单酯选择性好且优良的催化剂成为必要。Ca/HMCM-22 and CaHMCM-22 zeolite catalysts were prepared by impregnation and ion exchange respectively. The catalysts were characterized by XRD, TPD, FT-IR, and ICP. When CaSO4 loading was less than 6.5%, CaSO4 could be highly dispersed on HMCM-22 zeolite. A few variations in the strength and content of weak acid, and a slightly decrease of the content of strong acid were found in the two catalysts. However, the strength and content of weak and strong base on CaHMCM-22 were more than those on Ca/HMCM-22 after modification. The two catalysts exhibited good catalytic performance for the synthesis of monododecylphosphate by esterification of phosphoric acid with equimolar lauryl alcohol. The catalytic activity over Ca/HMCM-22 zeolite was higher than the catalytic activities of HMCM- 22 and Ca/NaMCM-22 zeolite, CaSO4 in synergy with acid sites and base sites of zeolite catalyst accelerated the esterification. The catalytic activity over CaHMCM-22 exchanged 3 times was also better than those of HMCM-22 and CaNaMCM-22 zeolite. Combined with the results of characterization and esterification, the presence of acidic and basic sites promoted effectively the synthesis of monododecylphosphate.

关 键 词：浸渍 离子交换 MCM-22分子筛 单十二烷基磷酸酯 

分 类 号：TQ032[化学工程]