Method for preparing hydrocarbon conversion catalyst using acid amide solutions to impregnate a tin component
AssigneeToa Nenryo Kogyo Kabushiki Kaisha
InventorsTakuji Itoh, Eiichiroh Nishikawa, Tadashi Miura, Takashi Yamahata
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Abstract
Improved distribution of the tin component of a hydrocarbon conversion catalyst also containing a Group VIII noble metal and halogen on a carrier is obtained by impregnation of the carrier with a solution of an acid amide or derivatives thereof and a soluble tin compound.
Claims17
In a method for preparing a hydrocarbon conversion catalyst comprising a refractory inorganic oxide carrier, 0.01 to 3 weight % of a Group VIII noble metal component, a tin component and 0.1 to 3 weight % of a halogen component by the procedure of impregnating said carrier with a solution or solutions containing said metal and halogen components, the improvement which comprises a step of impregnating the said carrier with a solution comprising from about 0.01 to 2 weight % of a soluble compound of tin in a solvent comprising an acid amide selected from the group consisting of primary amides, secondary amides, tertiary amides and mixtures thereof and washing and drying the impregnated carrier.
A method for preparing a hydrocarbon conversion catalyst which comprises the following steps in combination:
- 1. impregnating a refractory inorganic oxide carrier with an aqueous halogen acid solution containing from about 0.01 to 2 weight % of a Group VIII noble metal;
- 2. washing and drying the impregnated carrier from step (1);
- 3. impregnating the product of step (2) with a solution comprising an acid amide selected from the group consisting of primary amides, secondary amides, tertiary amides and mixtures thereof, and from about 0.01 to 2 weight % of a soluble compound of tin;
- and
- 4. washing and drying the product of step 3.
Dependencies are inferred from the claim text.