초록 ▼

A method is provided of crystallizing strong-bound zeolites on the surfaces of a monolithic ceramic substrate by hydrothermally treating the substrate, in the presence of active silica, with a caustic bath to zeolitize the silica. According to various embodiments of the invention, the active silica

A method is provided of crystallizing strong-bound zeolites on the surfaces of a monolithic ceramic substrate by hydrothermally treating the substrate, in the presence of active silica, with a caustic bath to zeolitize the silica. According to various embodiments of the invention, the active silica can be present as a component of the caustic bath, in the form of a dried coating pre-deposited on the substrate, or as a separate phase of the monolithic substrate, homogeneous dispersed within the ceramic material.

대표청구항 ▼

A method of crystallizing a zeolite on the surfaces of a monolithic ceramic substrate, comprising (a) providing a sintered monolithic substrate having an oxide composition consisting essentially of 45-75% by weight silica, 8-45% by weight alumina, and 7-20% by weight magnesia; and (b) hydrothermally

A method of crystallizing a zeolite on the surfaces of a monolithic ceramic substrate, comprising (a) providing a sintered monolithic substrate having an oxide composition consisting essentially of 45-75% by weight silica, 8-45% by weight alumina, and 7-20% by weight magnesia; and (b) hydrothermally treating the substrate with an aqueous solution comprising sodium oxide or sodium hydroxide and alumina at a temperature and for a time sufficient to crystallize a zeolite on the surfaces of said substrate.