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专利名称：Process for making crystalline
metallosilicates
发明人：Bulut, Metin,Jacobs, Pierre,Minoux,
Delphine,Nesterenko, Nikolai,Dath, Jean-Pierre,Van Donk, Sander
申请号：EP08157768.6申请日：20080606公开号：EP2130585A1公开日：20091209
摘要：The present invention relates to a process for making a crystalline
metallosilicate composition and comprising crystallites having an inner part (the core)and an outer part (the outer layer or shell) such that : the ratio Si/Metal is higher in theouter part than in the inner part, the crystallites have a continuous distribution of metaland silicon over the crystalline cross-section, said process comprising : a) providing anaqueous medium comprising OH anions and a metal source, b) providing an aqueousmedium comprising an inorganic source of silicon and optionally a templating agent, c)optionally providing a non aqueous liquid medium comprising optionally an organicsource of silica, d) mixing the medium a), b) and the optional c) at conditions effective topartly crystallize the desired metallosilicate, e) cooling down the reaction mixturea)+b)+c) to about room temperature, f) decreasing the pH of the reaction mixture by atleast 0.1 preferably by 0.3 to 4, more preferably by 0.5 to 3, g) subjecting the resultingmixture of step f) at conditions effective to continue the crystallization of the desiredmetallosilicate, h) recovering the desired metallosilicate, wherein at step d) in the mixture
a)+b)+c), before crystallization, the ratio Si org/Si inorganic is < 0.3 , advantageously < 0.2and preferably 0, the molar ratio OH/SiO is at least 0.3, preferably from 0.3 to 0.6 andmore preferably from 0.33 to 0.6 .
申请人：Total Petrochemicals Research Feluy
地址：Zone Industrielle C 7181 Seneffe (Feluy) BE
国籍：BE
代理机构：Leyder, Francis
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