Abstract:
Formmassen, umfassend wenigstens ein Styrol-haltiges Polymer und wenigstens ein zeolithisches Material vom Strukturtyp MFI, ein Verfahren zum Entfernen von Styrol-monomer aus Styrol-haltigem Polymer sowie die Verwendung von wenigstens einem zeolithischen Material vom Strukturtyp MFI zum Entfernen von Styrolmonomer aus einer Formmasse, umfassend Styrol-haltiges Polymer.
Abstract:
The present invention relates to a process for conditioning a raw suspension comprising at least one metal-organic framework and at least one suspension medium by means of at least one membrane filtration to obtain a product suspension. The invention relates also to a method, wherein said product suspension is coated to at least part of the surface of a substrate.
Abstract:
A process for preparing a zeolitic material comprising a metal M, having framework type AEI, and having a framework structure which comprises a tetravalent element Y, a trivalent element X, and oxygen, said process comprising (i) providing a zeolitic material comprising the metal M, having a framework type other than AEI, and having a framework structure comprising the trivalent element X, and oxygen; (ii) preparing a synthesis mixture comprising the zeolitic material provided in (i), water, a source of the tetravalent element Y, and an AEI framework structure directing agent; (iii) subjecting the synthesis mixture prepared in (ii) to hydrothermal synthesis conditions comprising 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, obtaining the zeolitic material having framework type AEI; wherein Y is one or more of Si, Ge, Sn, Ti, Zr; wherein X is one or more of Al, B, Ga, In; wherein M is a transition metal of groups 7 to 12 of the periodic table of elements.
Abstract:
A composition comprising a ternary intermetallic compound X 2 YZ, wherein X, Y, and Z are different from one another; X being selected from the group consisting of Mn, Fe, Co, Ni, Cu, and Pd; Y being selected from the group consisting of Cr, Co, and Ni; and Z being selected from the group consisting of Al, Si, Ga, Ge, In, Sn, Zn, and Sb; wherein the ternary intermetallic compound is supported on a porous oxidic support material. The composition may be prepared by providing a liquid mixture of sources of X, Y, and Z, and the porous oxidic support material, removing the liquid and heating the resulting mixture in a reducing atmosphere. The composition is useful as catalyst.
Abstract:
A process for preparing 2,6-dimethyl-5-heptenal, comprising oxidizing citral of which more than 50 % are present as geranial with hydrogen peroxide in the presence of a catalyst comprising a Baeyer-Villiger oxidation catalyst, preferably a tin-containing molecular sieve.
Abstract:
The invention is related to a storage vessel (1) comprising at least one shaped body (3) of a porous solid, wherein the storage vessel (1) comprises a wall (5) with at least one inlet (7), the storage vessel (1) having a central axis (9), the central axis (9) being a longitudinal axis of the storage vessel (1) and/or perpendicular to a cross-sectional area of the inlet (7), wherein at least 80% of a radial cross-sectional area (19) of the storage vessel (1) is covered by the at least one shaped body (3), wherein a ratio between a longest first extension (11) of the at least one shaped body (3) in a radial direction (13) and a longest second extension (15) of the at least one shaped body (3) in an axial direction (17) is equal to or greater than 5, axial and radial referring to the central axis (9) of the storage vessel (1), wherein an opening (21) in the axial direction (17) is provided in the at least one shaped body (3) and wherein at least one first spacer (25) is provided next to or on a lateral surface (23) of the at least one shaped body (3), the lateral surface (23) facing in the axial direction (17). The invention is further related to a shaped body and use of the shaped body.
Abstract:
A process for preparing a tin-containing zeolitic material having an MWW-typeframe- work structure comprising providing a zeolitic material having an MWW-typeframework structure having vacant tetrahedral framework sites, providing a tin-ion source in solid form,and incorporating tin into the zeolitic material via solid-state ion exchange.
Abstract:
Sorption store (10) particularly for storing an adsorbed natural gas, said sorption store (10) containing at least one adsorbent medium (40), wherein said sorption store (10) is equipped with an external passive cooling (72).
Abstract:
A continuous process for the preparation of propylene oxide, comprising (i) providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, water, optionally propane, and at least one dissolved potassium salt; (ii) passing the feed stream provided in (i) into an epoxidation reactor comprising a catalyst comprising a titanium zeolite of structure type MWW, and subjecting the feed stream to epoxidation reaction conditions in the epoxidation reactor, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the at least one potassium salt, optionally propene, and optionally propane; (iii) removing an effluent stream from the epoxidation reactor, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the at least one potassium salt, optionally propene, and optionally propane.
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.