Abstract:
The present invention relates to a process for the preparation of butadiene comprising (i) providing a gas stream G- comprising ethanol; (ii) contacting the gas stream G- provided in (i) with a catalyst, thereby obtaining a gas stream G-2 comprising butadiene; wherein the catalyst comprises a crystalline material supporting one or more catalytically active metals M, as well as to the use of the crystalline material supporting one or more catalytically active metals M.
Abstract:
A method of dehydration of at least one compound (A) comprising, in the chain form, -at least one hydroxyl group and -at least one carbonyl functionality selected from the group consisting of aldehyde (CHO), ke- tone (CO) and carboxylic acid (COOH) and mixtures thereof,in the presence of at least one zeolite which is (a) obtainable from an organotemplate-free synthetic process and (b) isomorphously substituted comprising silicon, aluminum and at least one further metal wherein the at least one further metal is selected from the group consisting of the elements of Group 3 to 14 in Period 4 to 6and mixtures thereof.
Abstract:
The present invention relates to a process for the preparation of a zeolitic material having a CHA-type framework structure comprising YO 2 and X 2 O 3 , wherein said process comprises the steps of: (1) providing a mixture comprising one or more sources for YO 2 , one or more sources for X 2 O 3 , and one or more tetraalkylammonium cation R 1 R 2 R 3 R 4 N + -containing compounds as structure directing agent; (2) crystallizing the mixture obtained in step (1) for obtaining a zeolitic material having a CHA-type framework structure; wherein Y is a tetravalent element and X is a trivalent element, wherein R 1 , R 2 , and R 3 independently from one another stand for alkyl, wherein R 4 stands for cycloalkyl, and wherein the mixture provided in step (1) does not contain any substantial amount of a source for Z 2 O 5 , wherein Z is P, as well as to zeolitic materials which may be obtained ac- cording to the inventive process and to their use.
Abstract:
The present invention relates to a process for purifying a pyrolysis oil comprising providing a stream S0 comprising a pyrolysis oil, the pyrolysis oil comprising one or more halogenated organic compounds and one or more organic compounds comprising conjugated double bonds; subjecting the stream S0 to hydrogenation in at least one reaction zone Z1 containing a heterogeneous hydrogenation catalyst, obtaining a stream S1 being depleted, compared to S0, in the one or more organic compounds comprising conjugated double bonds; subjecting the stream S1 to dehalogenation in at least one dehalogenation zone Z2 downstream of Z1, obtaining a stream S2 being depleted, compared to S1, in the one or more halogenated organic compounds.
Abstract:
Provided are a process for the preparation of an iron containing zeolitic material having an AEI framework structure using a quaternary phosphonium cation, as well as an iron containing zeolitic material per se as obtainable or obtained according to the process. Furthermore, an exhaust gas treatment system comprising the iron containing zeolitic material and the use of the iron containing zeolitic material as a catalyst are provided.
Abstract:
A process for the preparation of a zeolitic material comprising YO 2 and X 2 O 3 in its framework structure is provided, wherein Y stands for a tetravalent element and X stands for a trivalent element. The process comprises steps of (1) preparing a mixture comprising one or more structure directing agents, seed crystals, and a first zeolitic material comprising YO 2 and X 2 O 3 in its framework structure, wherein the first zeolitic material has a framework structure selected from the group consisting of FAU-, GIS-, MOR-, and LTA-type framework structures, including mixtures of two or more thereof; (2) heating the mixture obtained in (1) for obtaining a second zeolitic material comprising YO 2 and X 2 O 3 in its framework structure, wherein the second zeolitic material obtained in (2) has a different type of framework structure than the first zeolitic material contained in the mixture obtained in (1); wherein the mixture prepared in (1) and heated in (2) contains 1000 wt.% or less of H 2 O based on 100 wt.% of YO 2 in the framework structure of the first zeolitic material. As well as a zeolitic material obtainable and/or obtained according to the process and its use are provided.
Abstract:
The present invention relates to a catalyst for the preparation of butadiene comprising Hf and two or more further catalytically active metals M1 and M2, wherein the two or more fur- ther catalytically active metals M1 and M2 are selected from the group consisting of Zr, Zn, Cu and combinations of two or more thereof, and wherein M1 is different from M2; as well as to a process for the preparation of butadiene comprising (i) providing a gas stream G-1 comprising ethanol; (ii) contacting the gas stream G-1 provided in (i) with theinventive catalyst, thereby obtaining a gas stream G-2 comprising butadiene; wherein the catalyst comprises Hf and two or more further catalytically active metals M and M2, wherein the twoor morefurther catalytically active metals M1 and M2 are selected from the group consisting of Zr, Zn, Cu and combinations of two or more thereof, and wherein M1 is different from M2, as well as to the use of the catalyst comprises Hf and two or more further catalytically active 1 metals M1 and M2, wherein the twoor morefurther catalytically active metals M1 and M2 are selected from the group consisting of Zr, Zn, Cu and combinations of two or more thereof, and wherein M1 is different from M2.
Abstract:
Verfahren zur Herstellung eines Katalysators für die Dehydroaromatisierung, dadurch gekennzeichnet, dass a) ein Katalysator, der ein Zeolith und mindestens ein katalytisch aktives Metalle enthält, b) mit einer Silicium enthaltenden Verbindung passiviert wird und c) anschließend gegebenenfalls calciniert wird.
Abstract:
A process for preparing a zeolitic material having framework type CHA and having a framework structure which comprises a tetravalent element Y, B, and O, comprising preparing a synthesis mixture comprising water, a source of the tetravalent element Y, a source of B, and a CHA framework structure directing agent, and heating the synthesis mixture to a temperature in the range of from 100 to 200°C and keeping the synthesis mixture at a temperature in this range under autogenous pressure, and subjecting the zeolitic material obtained to an acid treatment.
Abstract:
A composition comprising a support material which comprises silicon carbide on the surface of which a zeolitic material of the AEI/CHA family is supported, wherein at least 99 weight-% of the framework structure of the zeolitic material consist of a tetravalent element Y which is one or more of Si, Ge, Ti, Sn and V; a trivalent element X which is one or more of Al, Ga, In, and B; O; and H.