Solid superacid catalysts comprising platinum metal

A catalyst composition prepared by:

• (a) sulfating a support comprising oxide or hydroxide of Group III or Group IV elements;
• (b) calcining said support in a first calcination step;
• (c) introducing a first metal comprising a metal or mixture of metals selected from the group consisting of platinum;
• palladium;
• nickel;
• platinum and rhenium;
• and platinum and tin on said support, and combinations thereof, and
• (d) calcining said support and said first metal in a second calcination step;
• wherein the conditions of said second calcination step comprise a lower temperature than said first calcination step.

A catalyst composition comprising a mixture of:

• (a) a sulfated support comprising oxide or hydroxide of Group III or Group IV elements;
• (b) a first metal comprising a metal or mixture of metals selected from the group consisting of platinum;
• palladium;
• nickel;
• platinum and rhenium;
• and platinum and tin, and combinations thereof;
• (c) at least one second metal selected from group consisting of Group VIII elements;
• and
• (d) at least one third metal selected from the group consisting of Group V, Group VI and Group VII elements;
• wherein said catalyst is prepared by the steps comprising:
• (1) calcining said mixture of sulfated support, second metal and third metal in a first calcination step;
• (2) introducing said first metal into said mixture;
• and
• (3) calcining said mixture and said first metal in a second calcination step;
• wherein the conditions of said second calcination step comprise a lower temperature than said first calcination step.

The composition prepared by:

• (a) forming a mixture by the steps of (i) sulfating a support comprising oxide or hydroxide of Group III or Group IV elements;
• (ii) introducing on said support at least one second metal selected from group consisting of Group VIII elements;
• and (iii) introducing on said support at least one third metal selected from the group consisting of Group V, Group VI and Group VII elements;
• (b) calcining the mixture comprising said support, said second metal and said third metal in a first calcination step;
• (c) introducing on said mixture a first metal comprising a metal or mixture of metals selected from the group consisting of platinum;
• palladium;
• nickel;
• platinum and rhenium;
• and platinum and tin, and combinations thereof;
• and
• (d) calcining said mixture and said first metal in a second calcination step;
• wherein the conditions of said second calcination step comprise a lower temperature than said first calcination step.

A process for preparing a catalyst which comprises:

• (a) sulfating a support comprising oxide or hydroxide of Group III or Group IV elements;
• (b) heating said support in a first calcination step;
• (c) introducing a first metal on said support, said first metal comprising a metal or mixture of metals selected from the group consisting of platinum;
• palladium;
• nickel;
• platinum and rhenium;
• and platinum and tin;
• and combinations thereof;
• and
• (d) heating said support anti said first metal in a second calcination step;
• wherein the conditions of said second calcination step comprise a lower temperature than said first calcination step.