초록 ▼

Gases having molecular dimensions equal to or smaller than nitrogen are selectively adsorbed and separated from other gases having molecular dimensions equal to or larger than methane using a clinoptilolite molecular sieve that contains magnesium cations. The clinoptilolite molecular sieves of the p

Gases having molecular dimensions equal to or smaller than nitrogen are selectively adsorbed and separated from other gases having molecular dimensions equal to or larger than methane using a clinoptilolite molecular sieve that contains magnesium cations. The clinoptilolite molecular sieves of the present invention can be ion-exchanged with magnesium cations and optionally with other cations such as lithium, sodium, potassium, calcium, barium, strontium, zinc, copper, cobalt, iron and manganese to produce the desired separation characteristics. Processes are disclosed for separating gases by adsorbing at an elevated pressure and regenerating, or desorbing, by reducing the pressure. Methods for the preparation of a magnesium-exchanged clinoptilolite are disclosed.

대표청구항 ▼

A process for separating a first gas containing molecules having molecular dimensions equal to or smaller than nitrogen from a feed containing mixtures thereof with at least one other gas containing molecules having molecular dimensions equal to or larger than methane, which comprises contacting the

A process for separating a first gas containing molecules having molecular dimensions equal to or smaller than nitrogen from a feed containing mixtures thereof with at least one other gas containing molecules having molecular dimensions equal to or larger than methane, which comprises contacting the feed with a clinoptilolite molecular sieve that has a magnesium cation content that is sufficient to cause the first gas to be selectively absorbed on the clinoptilolite molecular sieve, said magnesium cation content being at least about 5 equivalent percent of the ion-exchangeable cations in the clinoptilolite molecular sieve, and recovering an effluent having a reduced amount of the first gas relative to the feed.