Patent · US Expired

Separation device

US4685940A · kind A · utility

52Cited by

12References

11Claims

0Family size

Inventors

Abraham Soffer · Arad, IL
Jacob E. Koresh · Beer Sheva, IL
Shlomo Saggy · Beer Sheva, IL

Key dates

Filing date	Jul 30, 1985
Grant date	Aug 11, 1987
Priority date	—
Expiry date	Jul 30, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2111/00801
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

There are provided carbon membranes for use in separation processes. These have a very narrow range of pore sizes, with a very sharp cutoff at the upper pore size, and thus they are suited for the separation of various constituents which differ but little in their size. The membranes can be of a varied configuration: sheet form, tubular form, assymetrical membranes and the like. There is provided a process for the production of such membranes by controlled pyrolysis of a carbon containing percursor material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.