Abstract:
A process for the oxidation of an organic carbonyl compound comprising reacting the compound, optionally in the presence of a solvent, with hydrogen peroxide in the presence of a catalyst comprising a tin-containing zeolitic material and at least one potassium salt.
Abstract:
The present invention relates to A process for the production of a molding, comprising (I) providing a zeolitic material; (II) mixing the zeolitic material provided in step (I) with one or more binders; (III) kneading of the mixture obtained in step (II); (IV) molding of the kneaded mixture obtained in step (III) to obtain one or more moldings; (V) drying of the one or more moldings obtained in step (IV); and (VI) calcining of the dried molding obtained in step (V); wherein the zeolitic material provided in step (I) displays a water adsorption ranging from 1 to 15 wt.-% when exposed to a relative humidity of 85%, as well as to a molding obtainable or obtained according to the inventive process in addition to a molding per se and to their respective use.
Abstract:
The present invention relates to a process for the recovery of an at least bidentate organic compound comprised in a porous metal-organic framework material, the material comprising the at least bidentate organic compound coordinated to at least one metal ion, the process comprising the steps of (a) treating the metal-organic framework material with an acidic or alkaline liquid; (b) optionally separating off solid residue; and (c) isolating the at least bidentate organic compound.
Abstract:
The present invention relates to a process for the preparation of a pillared silicate compound comprising a layered silicate structure and bridging silicon atoms located between adjacent silicate layers of the silicate structure, wherein said bridging silicon atoms form at least one covalent bond to each of the adjacent silicate layers, said process comprising (1) providing one or more layered silicates; (2) adding said one or more layered silicates to a solvent system, wherein the resulting mixture has a pH of 5 or less; and (3) subjecting the mixture obtained in step (2) to solvothermal conditions; wherein no silicon-containing compound according to formula (I) R4-mSi[-(SiR2)n-R]m (I) is used at any point of the process up to and including step (3), wherein m is 1, 2, 3, or 4, and n is an integer greater than or equal to 0, wherein when n is equal to 0, one or more residues R are leaving groups, and wherein none of the residues R contains Si, as well as to a pillared silicate compound per se, preferably as obtained and/or obtainable according to the inventive process as well as to the use of the inventive compounds.
Abstract:
The invention relates to a method for purifying a mixture comprising at least one liquid hydro- carbon and water by at least partly separating off the at least one liquid hydrocarbon from the mixture, the method comprising the step of passing the mixture through a sorption agent comprising at least one porous metal-organic framework material, wherein the at least one metal- organic framework material comprises at least one organic compound coordinated to at least one metal ion, wherein the at least one organic compound is based on imidazole, which is unsubstituted or substituted with one or more substituents independently selected from the group consisting of C 1-6 alkyl, phenyl and benzyl. The invention further relates to the use of such metal-organic framework material for purifying the mixture.
Abstract:
Sorption store (1) for the storage of a gas (16) comprising at least two gas adsorbent media disposed within an at least one vessel, said at least two gas adsorbent media distinguishable from each other by different adsorption capacities (30), said adsorption capacities (30) defined by the ratio of the mass of the adsorbed gas (16) to the mass of the adsorbent medium, for the stored gas (16) at equal adsorption conditions, said adsorption conditions defined by temperature (20), pressure (32) and gas phase composition.
Abstract:
The present invention relates to a process for the regeneration of a catalyst comprising a titanium-containing zeolite, said catalyst having been used in a process for the preparation of an olefin oxide and having phosphate deposited thereon, said process for the regeneration comprising the steps: (a) separating the reaction mixture from the catalyst, (b) washing the catalyst obtained from (a) with liquid aqueous system; (c) optionally drying the catalyst obtained from (b) in a gas stream comprising an inert gas at a temperature of less than 300 °C; (d) calcining the catalyst obtained from (c) in a gas stream comprising oxygen at a temperature of at least 300 °C.
Abstract:
A continuous process for the preparation of propylene oxide, comprising (i) providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, water, dissolved potassium dihydrogen phosphate, and optionally propane; (ii) passing the liquid feed stream provided in (i) into an epoxidation reactor comprising a catalyst comprising a titanium zeolite of structure type MWW, and subjecting the liquid feed stream to epoxidation reaction conditions; (iii) removing an effluent stream from the epoxidation reactor; wherein the concentration of the dissolved potassium dihydrogen phosphate in the liquid feed stream is at least 10 % of the solubility limit of the potassium dihydrogen phosphate in the liquid feed stream.
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 process for preparing an aluminum-free boron containing zeolitic material comprising the framework structure MWW (BMWW), comprising (a) hydrothermally synthesizing the BMWW from a synthesis mixture containing water, a silicon source, a boron source, and an MWW template compound obtaining the BMWW in its mother liquor, the mother liquor having a pH above 9; (b) adjusting the pH of the mother liquor, obtained in (a) and containing the BMWW, to a value in the range of from 6 to 9; (c) separating the BMWW from the pH- adjusted mother liquor obtained in (b) by filtration in a filtration device.