Methods for improving metal dispersion of a catalyst
AssigneeChevron Phillips Chemical Company LP
InventorsGabriela D. ALVEZ, Joseph J. BERGMEISTER, Cori DEMMELMAIER-CHANG
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Abstract
Methods of improving metal dispersion of a catalyst, such as by contacting a spent catalyst and a stream including chlorine gas, and a stream including oxygen gas to form a regenerated catalyst. The regenerated catalyst may be used to catalyze a chemical reaction, and, after the chemical reaction, be regenerated one or more additional times.
Claims20
A method of regenerating a spent catalyst comprising a transition metal and a catalyst support, the method comprising:
- contacting the spent catalyst and a first stream comprising chlorine gas (Cl2) to produce a chlorinated catalyst;
- and
- contacting the chlorinated catalyst and a second stream comprising oxygen gas (O2) to form a regenerated catalyst.
A method of regenerating a spent catalyst comprising a transition metal catalyst and a catalyst support, the method comprising:
- providing the spent catalyst, wherein the spent catalyst has a first dispersion of the transition metal catalyst;
- drying the spent catalyst to produce a dried catalyst having a moisture content of 50 ppm or less, wherein the drying of the spent catalyst comprises contacting the spent catalyst and an inert gas;
- contacting the dried catalyst and a first stream comprising chlorine gas (Cl2) to produce a chlorinated catalyst, wherein the chlorine gas is present in the first stream at a mole fraction of about 0.01% to about 5%;
- and
- contacting the chlorinated catalyst and a second stream comprising oxygen gas (O2) to form a regenerated catalyst having a second dispersion of the transition metal catalyst;
- wherein the second dispersion of the transition metal catalyst is at least 10 percentage points greater than the first dispersion of the transition metal catalyst.
Dependencies are inferred from the claim text.