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US 6,596,661 B2Granted
Process for regenerating a deactivated catalyst
AssigneeSiemens Aktiengesellschaft
InventorRonald Neufert
Life of this patent
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Abstract
A process for regenerating a catalyst, in particular a plate-type or honeycomb catalyst, which has been at least partially deactivated by catalyst poisons, is described. The catalyst is treated with a gaseous reducing agent and with a polyfunctional complex-forming agent, so that the catalyst poisons are removed.
Claims12
A process for regenerating catalysts, which comprises the steps of:
- treating a catalyst with a gaseous reducing agent to remove catalyst poisons;
- and
- washing the catalyst with a polyfunctional complex-forming agent, the polyfunctional complex-forming agent being selected from the group consisting of a hydroxycarboxylic acid, a hydroxydicarboxylic acid solution and a solution of organic amines.
A process for regenerating catalysts, which comprises the steps of:
- treating a catalyst with a gaseous reducing agent to remove catalyst poisons;
- and
- subjecting the catalyst to an impregnation process with at least one catalyst active component, the catalyst active component being one of suspended and dissolved in a polyfunctional complex-forming agent, the polyfunctional complex-forming agent used being selected from the group consisting of a hydroxycarboxylic acid, a hydroxydicarboxylic acid solution and a solution of organic amines.
Dependencies are inferred from the claim text.