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US 8,410,014 B2Granted
Method for producing catalysts and their use for the gas phase oxidation of olefins
AssigneeWacker Chemie AG
InventorsRoland Heidenreich, Hans-Jurgen Eberle, Johann Weis
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Abstract
Especially physically stable metal oxide catalyst supports are prepared by suspending a metal oxide in a continuous phase, activating by fine dispersion, coagulation to a viscoelastic mass, shaping, drying, and calcining. The catalyst support thus prepared may be treated with catalytic agents to produce supported catalysts for olefin oxidation.
Claims37
A process for producing catalysts for the gas-phase oxidation of olefins, which comprises the steps:
- (1) suspending at least one pyrogenic metal oxide in a liquid phase to form a suspension,
- (2) converting the metal oxide into an active state in a continuous phase by producing a fine metal oxide dispersion by means of a dispersing apparatus and/or wet milling,
- (3) coagulating the dispersion to obtain a viscoelastic mass,
- (4) shaping the viscoelastic mass into a shaped body,
- (5) drying the shaped body,
- (6) calcining the shaped body obtained in step (5), to form a calcined shaped body,
- (7) converting the calcined shaped body into an active catalyst by applying one or more catalytically active compounds or catalyst precursor compounds which can be converted in a subsequent step into one or more catalytically active compounds, and optionally applying one or more promoter compounds.
4 more elements
Dependencies are inferred from the claim text.