Abstract:
A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600null C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at from 250 to 800null C., preferably from 350 to 600null C., with a gas stream which contains from 0.1 to 4% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof, and (III) treating the catalyst at from 250 to 800null C., preferably from 350 to 600null C., with a gas stream which contains from more than 4 to 100% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof.
Abstract:
The present invention relates to a novel class of shaped bodies containing metal-organic frameworks. Said metal-organic frameworks comprise at least one metal ion and at least one at least bidentate organic compound and contain at least one type of micro- and mesopores or micro- or mesopores. Said shaped bodies comprise at least one metal-organic framework material and may optionally contain further substances, in particular at least one supporting material.
Abstract:
A process for regenerating a zeolite catalyst comprises the following stages: (I) Heating a partially or completely deactivated catalyst to 250-600null C. in an atmosphere which contains less than 2% by volume of oxygen, (II) treating the catalyst at from 250 to 800null C., preferably from 350 to 600null C., with a gas stream which contains from 0.1 to 4% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof, and (III) treating the catalyst at from 250 to 800null C., preferably from 350 to 600null C., with a gas stream which contains from more than 4 to 100% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof.
Abstract:
A process for preparing glycol monoethers from olefins comprises reacting the olefins with an epoxidizing reagent in the simultaneous presence of hydroxyl-containing organic compounds over a mixture of epoxidation catalysts and alkoxylation catalysts.