Patent ID: 9714204
Date: 2017-07-25
CPC Classifications: C07C,C08F,C10J,Y02P

Claim:
1. A process for purifying an olefin stream comprising at least 99 mol % ethylene, wherein the process comprises: (a) passing the olefin stream through a sulfur guard bed to remove sulfur compounds and to yield a substantially sulfur-free effluent; (b) contacting the substantially sulfur-free effluent from (a) with a hydrogenation catalyst to yield a substantially sulfur-, oxygen-, acetylene-, methyl acetylene-, and propadiene-free effluent; (c) passing the substantially sulfur-, oxygen-, acetylene-, methyl acetylene-, and propadiene-free effluent from (b) through a copper-metal containing catalyst bed to remove carbon monoxide and hydrogen and to yield a substantially sulfur-, oxygen-, acetylene-, methyl acetylene-, propadiene-, carbon monoxide-, and hydrogen-free effluent; and (d) passing the substantially sulfur-, oxygen-, acetylene-, methyl acetylene-, propadiene-, carbon monoxide-, and hydrogen-free effluent from (c) through a desiccant comprising alumina, molecular sieve, or a hybrid alumina-zeolite composite to remove polar contaminants and yield a purified ethylene stream comprising greater than or equal to 99.875 mol % ethylene.