초록 ▼

Novel membranes comprise crystals of a zeo-type material carried by a porous support. The crystal growth of the zeo-type material is essentially continuous over the pores of the support and the zeo-type material is crystallized directly from and bonds directly to the support. Membranes may be prepar

Novel membranes comprise crystals of a zeo-type material carried by a porous support. The crystal growth of the zeo-type material is essentially continuous over the pores of the support and the zeo-type material is crystallized directly from and bonds directly to the support. Membranes may be prepared by immersing the support in a synthesis gel, crystallizing the gel, removing the support, and repeating these steps at least once.

대표청구항 ▼

A membrane which comprises a film of a crystalline material which is a molecular sieve with a crystal structure made up of a tetrahedra joined together through oxygen atoms to produce an extended network with channels of molecular dimensions, said film being carried by a porous support in which the

A membrane which comprises a film of a crystalline material which is a molecular sieve with a crystal structure made up of a tetrahedra joined together through oxygen atoms to produce an extended network with channels of molecular dimensions, said film being carried by a porous support in which the crystalline material of the film is essentially continuous over the pores of the support, extends into the support and the crystalline material is crystallized directly from and bonds directly to the Support wherein any pin-holes initially present in the film of crystalline material have been blocked by a post-treatment.