초록 ▼

Carbon dioxide is separated from gaseous hydrocarbons by a cyclic adsorption process using at a temperature in the range of about -50 to about 200.degree. C., wherein the adsorption step of the process is conducted by passing the gas mixture through an adsorption zone containing carbon molecular sie

Carbon dioxide is separated from gaseous hydrocarbons by a cyclic adsorption process using at a temperature in the range of about -50 to about 200.degree. C., wherein the adsorption step of the process is conducted by passing the gas mixture through an adsorption zone containing carbon molecular sieve or type A zeolite whose exchangeable cations are made up of about 50 to about 90% sodium ions and about 10 to about 50 percent potassium ions.

대표청구항 ▼

[ What is claimed is:] [1.] A method of separating carbon dioxide from a gas mixture by a cyclic adsorption process comprising the steps:(a) passing said gas mixture through at least one adsorption zone containing an adsorbent selected from the group consisting of type A zeolite having as its exchan

[ What is claimed is:] [1.] A method of separating carbon dioxide from a gas mixture by a cyclic adsorption process comprising the steps:(a) passing said gas mixture through at least one adsorption zone containing an adsorbent selected from the group consisting of type A zeolite having as its exchangeable cations, about 40 to about 90% sodium ions, about 10 to about 50% potassium ions and about 0 to about 10% other ions selected from the group consisting of Group IA ions, Group IB ions, Group IIA ions, Group IIIA ions, Group IIIB ions, lanthanide series ions and mixtures of these; thereby adsorbing at least part of the carbon dioxide from said gas mixture and producing a carbon dioxide-depleted gas; and(b) regenerating said adsorbent, thereby producing a carbon dioxide-enriched gas.