초록

ETS-10 titanosilicate materials selectively adsorb carbon dioxide from gaseous mixtures containing carbon dioxide and light paraffins such as methane and ethane.

대표청구항 ▼

1. A process for increasing the proportion of at least one light paraffin in a mixture comprising carbon dioxide and said at least one light paraffin, wherein said process comprises passing said mixture over an adsorbent, wherein said adsorbent comprises an as-prepared and/or modified ETS-10 zeolite

1. A process for increasing the proportion of at least one light paraffin in a mixture comprising carbon dioxide and said at least one light paraffin, wherein said process comprises passing said mixture over an adsorbent, wherein said adsorbent comprises an as-prepared and/or modified ETS-10 zeolite, said adsorbent selectively adsorbs carbon dioxide from said mixture, and said at least one paraffin comprises methane, ethane or a mixture thereof. 2. The process of claim 1, wherein said at least one light paraffin comprises more than 50 weight percent of ethane. 3. The process of claim 1, wherein said at least one light paraffin comprises more than 50 weight percent of methane. 4. The process of claim 1, 2, or 3, wherein said modified ETS-10 zeolite comprises an as-prepared Na-ETS-10 zeolite which has been modified by cation exchange with one or more than one mono-, di- or tri-valent metal cation, a proton or mixtures thereof. 5. The process according to claim 4 wherein said process is a pressure swing adsorption process. 6. The process according to claim 1, 2, or 3, wherein said process is a pressure swing adsorption process. 7. A pressure swing adsorption process for increasing the proportion of at least one light paraffin in a gaseous mixture comprising carbon dioxide and said at least one light paraffin, wherein said process comprises: i) passing said mixture through at least one adsorption bed containing an adsorbent comprising an as-prepared and/or modified ETS-10 zeolite, at a pressure at which said adsorbent selectively adsorbs carbon dioxide from said gaseous mixture to provide a stream enriched in said at least one light paraffin;ii) reducing the pressure in said at least one adsorption bed to a pressure at which said adsorbent releases adsorbed carbon dioxide to provide a stream enriched in carbon dioxide; and wherein said at least one light paraffin comprises methane, ethane or a mixture thereof. 8. A process comprising: i) passing a mixture comprising carbon dioxide and ethane through at least one adsorbent bed containing an adsorbent comprising an as-prepared and/or modified ETS-10 zeolite, wherein said as-prepared and/or modified ETS-10 zeolite selectively adsorbs carbon dioxide from said mixture to provide a product stream enriched in said ethane; andii) cracking said ethane in said product stream in a hydrocarbons cracking unit. 9. A process for increasing the proportion of at least one light paraffin in a mixture comprising carbon dioxide and said at least one light paraffin, wherein said process comprises: i) passing said mixture over an adsorbent, wherein said adsorbent comprises an as-prepared and/or modified ETS-10 zeolite, and wherein said adsorbent selectively adsorbs carbon dioxide from said mixture; andii) passing said mixture through an amine based liquid extraction unit, wherein said extraction unit selectively extracts carbon dioxide from said mixture; and provided that said at least one light paraffin comprises more than 50 weight percent of ethane.