초록 ▼

A process for producing supported metal catalysts having increased catalytic activity is provided. This process includes the steps of forming a high surface area porous support of a suitable porous material such as alumina or zirconia, dissolving a salt of a selected catalytic metal in an appropriat

A process for producing supported metal catalysts having increased catalytic activity is provided. This process includes the steps of forming a high surface area porous support of a suitable porous material such as alumina or zirconia, dissolving a salt of a selected catalytic metal in an appropriate supercritical fluid solvent, contacting the porous support with the supercritical fluid solution of the catalytic metal salt to impregnate the porous support with the solution so that the catalytic metal salt may be adsorbed on the surfaces of the support, and removing the supercritical fluid solvent by reducing the pressure or increasing the temperature to change the supercritical fluid from the supercritical fluid phase to the gas phase, which may then be recycled for further use. The insoluble catalytic metal salt is deposited in the form of a film on the surfaces of the support. The catalytic metal salt-containing porous support may then be processed conventionally to produce a substantially pure, high activity supported metal catalyst.

대표청구항 ▼

A process for preparing a metal catalyst supported on a high surface area porous support including the steps of: (a) selecting a high surface area porous support; (b) selecting a salt of a catalytic metal; (c) selecting a supercritical fluid solvent in which said catalytic metal salt is highly solub

A process for preparing a metal catalyst supported on a high surface area porous support including the steps of: (a) selecting a high surface area porous support; (b) selecting a salt of a catalytic metal; (c) selecting a supercritical fluid solvent in which said catalytic metal salt is highly soluble; (d) dissolving said catalytic metal salt in said supercritical fluid solvent at a temperature and pressure above the critical temperature and above the critical pressure of said fluid t form a catalytic metal salt-supercritical fluid solution; (e) contacting said porous support with said solution; (f) maintaining the catalytic metal salt-supercritical fluid solution at said temperature above the critical temperature for said fluid and at said pressure above the critical pressure for said fluid for the time required for the catalytic metal salt-supercritical fluid solution to substantially completely penetrate substantially all of the surface area of said support; and (g) changing either one of the temperature or the pressure of said solution to a temperature above the critical temperature or to a pressure below the critical pressure for said fluid to deposit a film of said catalytic metal salt on the surfaces of said porous support and to change said supercritical fluid to a recoverable gas.