Abstract:
Disclosed is a process for the alkylation of an organic compound comprising: (a) providing a catalyst comprising one or more zeolitic materials having a BEA framework structure, wherein the BEA framework structure comprises YO 2 and optionally comprises X 2 O 3 , wherein Y is a tetravalent element, and X is a trivalent element, (b) contacting the catalyst with one or more alkylatable organic compounds in the presence of one or more alkylating agents in one or more reactors for obtaining one or more alkylated organic compounds, wherein the one or more zeolitic materials is obtainable from a synthetic process which does not employ an organotemplate as structure directing agent.
Abstract:
The present invention relates to a process for the production of a pillared silicate comprising: (i) providing a layered silicate; (ii)interlayer expanding the layered silicate provided in step (i) comprising a step of treating the layered silicate with one or more swelling agents; (iii)treating the interlayer expanded silicate obtained in step (ii) with one or more hydrolyzable silicon containing compounds; (iv)treating the interlayer expanded compound obtained in step (iii) with an aqueous solution to obtain a pillared silicate; (v)removing at least a portion of the one or more swelling agents from the pillared silicate obtained in step (iv); (vi) impregnating the pillared silicate obtained in step (v) with one or more elements selected from the group consisting of Fe, Ru, Ir, and combinations of two or more thereof, as well as to a pillared silicate optionally obtainable from said process and its use, in particular in a process for the production of one or more olefins according to the invention.
Abstract:
Provided is a process for the preparation of a zeolitic material having a BEA framework structure comprising the steps of: (i) providing one or more zeolitic materials having a BEA framework structure, wherein the BEA framework structure comprises Y0 2 and X 2 O 3 , wherein Y is a tetravalent element, and X is a trivalent element; (ii) subjecting the one or more zeolitic materials provided in step (i) to a procedure for removing at least a portion of X, preferably tetrahedrally coordinated X, from the BEA framework structure; wherein the Y:X molar ratios of the one or more zeolitic materials provided in step (i) are respectively comprised in the range of from 1 to 50.
Abstract:
The present invention relates to a process for the preparation of a zeolitic material having a CHA framework structure, said zeolitic material comprising zeolite crystals having a core-shell structure, wherein said process comprises the steps of (1) providing a mixture comprising one or more sources for Z 2 O 5 , one or more sources for X 2 O 3 , optionally one or more structure directing agents, and seed crystals having a CHA framework structure, wherein the CHA framework structure of the seed crystals comprises Y0 2 , X 2 O 3 , and optionally Z 2 O 5 , and wherein the seed crystals have a diameter of 450 nm or greater; (2) crystallizing the mixture provided in (1) to afford zeolite crystals comprising a core of seed crystal provided in step (1 ) and a shell crystallized on the seed crystal; wherein Z is a pentavalent element, Y is a tetravalent element, and X is a trivalent element, and wherein preferably one or more sources for YO 2 are further provided in step (1 ).
Abstract:
Zeolitic materials of the LEV-type structure and methods for their production are provided. The method for producing of the zeolitic material having an LEV-type structure comprising Y0 2 and optionally comprising X 2 O 3 comprises the steps of: (1) preparing a mixture comprising one or more sources for Y0 2 , one or more solvents, and optionally comprising seed crystals; and (2) crystallizing the mixture obtained in step (1), wherein Y is a tetravalent element, and X is a trivalent element, the mixture crystallized in step (2) contains 3 wt.-% or less of one or more metals M based on 100 wt-% of Y0 2 , even more preferably contains no metal M, wherein M stands for sodium or potassium.