【摘要】 由ＴｉＣｌ４／ＨＣｌ配制的含钛柱化剂与粘土进行阳离子交换后得到大孔钛层柱粘土（Ｔｉ－ＰＩＬＣ），详细研究了各种合成条件，诸如Ｔｉ（Ⅳ）及ＨＣｌ浓度，柱化剂老化时间，粘土初始浓度，交换温度及配料比等对层柱粘土的大孔及比表面积的影响．优化条件合成的Ｔｉ－ＰＩＬＣ存在两种晶面间距（ｄ００１），其中之一（２．５６ｎｍ）对应大孔结构．Ｔｉ－ＰＩＬＣ比表面积为３２８ｍ２／ｇ，５００℃焙烧后ｄ００１保持２．３２ｎｍ，６５０℃焙烧后比表面积仍达３０１．４ｍ２／ｇ．Ｔｉ－ＰＩＬＣ的大孔结构主要取决于交换时混合液中Ｔｉ（Ⅳ）和ＨＣｌ浓度，并与柱化剂老化时间、交换温度等因素有关；与原柱化剂中Ｔｉ（Ⅳ）和ＨＣｌ浓度无关．混合液中ＣＨＣｌ提高，Ｔｉ－ＰＩＬＣ的比表面积下降；当ＣＨＣｌ增至７０ｍｍｏｌ／Ｌ时，产物中大晶面间距消失，仅留下小晶面间距（～１．４ｎｍ）．随着混合液中ＣＴｉＣｌ４的提高，Ｔｉ－ＰＩＬＣ的比表面积先上升而后下降。当ＣＴｉＣｌ４增至１４６ｍｍｏｌ／Ｌ时，产物也仅有小晶面间距（１．４ｎｍ）．更多还原

【Abstract】 itanium pillared clay (Ti-PILC) with large pores is synthesized bycanon exchange of Na-montmorillonite with pillaging agent preparedfrom TiCl4/HCl4 The influence of various synthetic conditions (such asthe concentration of Ti(Ⅳ) and HCl, the aging time of pillaring solution, the initial concentration of clay, the exchange temperature and theTi/clay ratio) on macropore and surface area of Ti-PILC has been investigated in detail. The product prepared in optimal condition has twokinds of hasal spacing with 1.35 and 2.56 nm, and its surface area is328. 0 m2/g. The hasal spacing corresponding to large pore maintains2.32 urn after calcination at 500℃ and the surface area 301. 4 m2/g at650℃. The large hasal spacing (2.56 nm) of Ti-PILC is dependent onCTicl4 and CHCl in mixed suspension rather than those in pillaring solution, and it disappears when CHCl increases to 70 mmol/L or CTicl4 increases to 146 mmol/L. The surface area increases with increasing CTicl4or decreasing CHCl in the suspension. Further increase in CTicl4 results indecrease in surface area.更多还原