摘要:
The present invention relates to an organotemplate-free synthetic process for the production of a zeolitic material having a BEA framework structure comprising YO 2 and optionally comprising X 2 O 3 , wherein said process comprises the steps of (1) preparing a mixture comprising seed crystals and at least one source for YO 2 ; and (2) crystallizing the mixture; wherein Y is a tetravalent element, and X is a trivalent element, wherein the zeolitic material optionally comprises at least one alkali metal M, wherein when the BEA framework additionally comprises X 2 O 3 , the mixture according to step (1) comprises at least one source for X 2 O 3 , and wherein the seed crystals comprise zeolitic material having a BEA framework structure, preferably zeolite Beta.
摘要翻译:本发明涉及一种用于生产具有包含YO 2且任选地包含X 2 O 3的BEA骨架结构的沸石材料的无机模板合成方法,其中所述方法包括以下步骤:(1)制备包含晶种 和至少一个YO 2来源; 和(2)使混合物结晶; 其中Y是四价元素,X是三价元素,其中沸石材料任选地包含至少一种碱金属M,其中当BEA骨架另外包含X 2 O 3时,根据步骤(1)的混合物至少包含 一种X 2 O 3源,其中晶种包含具有BEA骨架结构的沸石材料,优选沸石β。
摘要:
There is disclosed a method of using iron-containing aluminosilicate zeolite having both framework iron and iron cations on the ion-exchange sites in a selective catalytic reduction reaction, typically in the presence of ammonia, to reduce or remove nitric oxides from exhaust emissions.
摘要:
A family of microporous aluminosilicate zeolites and substituted versions thereof which are identified as UZM-8 and UZM-8HS have been prepared. These UZM-8 compositions can be prepared using either only one or more organoammonium cations, such as diethyldimethylammonium or ethyltrimethylammonium cations and optionally an alkali and/or an alkaline earth cation as structure directing agents. The UZM-8 compositions are described by an empirical formula of Mmn+Rrp+Al1-xExSiyOz and have a unique x-ray diffraction pattern. The UZM-8HS are derived from the UZM-8 zeolites and have a lower aluminum content than the UZM-8 compositions. These UZM-8HS are represented by the empirical formula M’m’n+Rr’p+Al(1-x)ExSiy’Oz’ and are prepared by treatments such as acid extraction and AFS treatments. Both the UZM-8 and UZM-8HS are useful in various hydrocarbon conversion processes.
摘要:
The catalytic cracking of a hydrocarbon oil to provide a product of increased octane number and increased C5+ gasoline content is effected with a cracking catalyst composition comprising as a first component, large pore crystalline molecular sieve, such as a zeolite Y, and as a second component a zeolite having an X-ray diffraction pattern (see Table I).