Patent ID: 7476637
Filing Date: 2009-01-13
Classification: B01J,C07C,Y02P

Abstract:
1. A catalyst useful for multi-phase reactors comprising: an active component surrounded by an inert, porous coating on a surface of the active component, wherein the inert, porous coating provides a liquid film around the active component to increase the useful life of the active component as compared to an uncoated active component; wherein said inert, porous coating has a pore diameter and contact angle which are selected in conjunction with the surface tension of the liquid to maintain a capillary pressure high enough to prevent the liquid from being displaced by vapor during a two phase flow over the catalyst; wherein the capillary pressure is calculated by the formula Pc=2σ cos θ/r; where Pc is the capillary pressure, psi; σ is the surface tension of the liquid, pounds per cubic inch; θ is the contact angle of the inert, porous coating in radians; and r is the radius of the pore, inches.