Process and adsorbent for separating CO2 from a mixture thereof with a hydrocarbon.

摘要

Clinoptilolites, including both natural clinoptilolites and those which have been ion-exchanged with metal cations such as, for example, lithium, sodium, potassium, calcium, magnesium, barium, strontium, zinc, copper, cobalt, iron and manganese, are useful as selective adsorbents for the removal of traces of carbon dioxide from streams of hydrocarbons having kinetic diameters of not more than about 5 Angstroms. Also disclosed is a modified clinoptilolite adsorbent containing sodium cations and non-sodium cation produced by a two step ion-exchange process wherein the first step exchanges sodium cations and the second step exchanges the non-sodium cation.