초록 ▼

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 var

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.

대표청구항 ▼

A carbon membrane for separating two gases having different size molecules in a range of 2.5 Åto 5.0 Å, wherein the molecules of each gas differ from one another in size by an amount not greater than 10%, said membrane having pores of a preselected size which also is in the range of 2.5 Åto 5.0 Åand

A carbon membrane for separating two gases having different size molecules in a range of 2.5 Åto 5.0 Å, wherein the molecules of each gas differ from one another in size by an amount not greater than 10%, said membrane having pores of a preselected size which also is in the range of 2.5 Åto 5.0 Åand which is intermediate the molecule sizes of the two gases to be separated, and said membrane having a pore size distribution which is such that the membrane has no significant number of pores which are 10% or greater in size than the smaller of the molecule sizes of the two gases.