Distillative separation of carbon dioxide from hydrogen sulfide
AssigneeHelix Technology Corporation
InventorsJames M. Ryan, Arthur S. Holmes
Life of this patent
Estimating the term…
Abstract
A distillative separation of carbon dioxide and hydrogen sulfide is improved by adding a C.sub.3 -C.sub.6 alkane, a mixture of C.sub.3 -C.sub.6 alkanes, SO.sub.2 or SO.sub.3 to a distillation column to increase the relative volatility of carbon dioxide to hydrogen sulfide. Increasing the relative volatility facilitates the separation.
Claims2
In a separation of carbon dioxide from hydrogen sulfide in a distillation column, the improvement of adding an agent for raising the relative volatility of carbon dioxide to hydrogen sulfide to said column at a point above the feed, said agent comprising a C.sub.3 -C.sub.6 alkane, a mixture of C.sub.3 -C.sub.6 alkanes, SO.sub.2 or SO.sub.3.
A method for separating carbon dioxide from a mixture containing carbon dioxide and hydrogen sulfide, comprising:
- a. introducing said mixture into a distillation column containing a plurality of vapor-liquid contact devices;
- b. operating said distillation column at conditions of pressure, temperature and composition sufficient to produce an enriched carbon dioxide overhead stream and an enriched hydrogen sulfide bottoms stream;
- and,
- c. introducing into said distillation column at a location above the feed point thereof a C.sub.3 -C.sub.6 alkane or mixture of C.sub.3-C.sub.6 alkanes, to thereby increase the relative volatility of carbon dioxide to hydrogen sulfide.
Dependencies are inferred from the claim text.