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《CHINESE JOURNAL OF CATAL YSIS》 1994-05
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SYNTHESIS OF TITANIUM PILLARED CLAY Ⅰ. TiCl_4 AS THE TITANIUM SOURCE

Chen, Xiao-yin; Tao, Long-clang and Zheng, Lu-bin(Dalian Institule of Chemical Physics, Chinese Academy of Sciences, Dalian 116023)  
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.
【Fund】: 国家自然科学基金 中国石化总公司科研基金
【CateGory Index】: TQ138.11
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