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US 5,153,163 AGranted
Process for the pretreatment of a catalyst by a mixture of a sulphur agent and an organic reducing agent
AssigneeEuropeenne de Retraitement de Catalyseurs Eurecat
InventorsRaymond Roumieu, Jean-Paul Boitiaux
Life of this patent
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Abstract
The invention relates to a pretreatment of a petrochemical or refining catalyst containing at least one metal in metallic or metallic oxide form, deposited on a support. The catalyst is impreganted by a solution or a suspension containing on the one hand a specific sulphur agent, e.g., diethanol disulfide and on the other an organic reducing agent, e.g., formic acid.
Claims14
A process for the pretreatment of a petrochemical or refining catalyst containing at least one metal in metallic or metallic oxide form and deposited on a support, comprising the following steps:
- a) firstly, impregnating said catalyst with an aqueous or organic solution, or an aqueous or organic suspension containing (i) at least one organic reducing agent selected from the group consisting of formic acid, ethyl formate and methyl formate and (ii) a sulphur-containing agent selected from the group consisting of diethanol disulfide or a mixture of diethanol disulfide with elemental sulfur,
- b) secondly thermally treating resultant impregnated catalyst.
Dependencies are inferred from the claim text.