Regeneration of an ionic liquid catalyst by hydrogenation using a macroporous noble metal catalyst
AssigneeChevron U.S.A. Inc.
InventorsHye Kyung Cho Timken, Jeff Johns, Rahul Shankar Bhaduri, Viorel Duma, John V. Heyse
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Abstract
The present disclosure provides a macroporous noble metal catalyst and processes employing such catalysts for the regeneration of deactivated ionic liquid catalyst containing conjunct polymer.
Claims23
A noble metal catalyst for hydro-regeneration of a deactivated ionic liquid catalyst containing a conjunct polymer, wherein the noble metal catalyst comprises a Group VIII noble metal hydrogenation component on a support having mesopores and macropores;
- wherein the noble metal catalyst has an average pore diameter of 27 to 1,000 nm (0.027 to 1 μm), a total pore volume of greater than 0.8 cc/g, and a macropore volume of 0.10 to 0.50 cc/g;
- wherein the mesopores have a diameter from 2 to 50 nm, and the macropores have a second diameter from greater than 50 to 5,000 nm.
A process for hydro-regeneration of a deactivated ionic liquid catalyst containing a conjunct polymer, the process comprising:
- (a) contacting the deactivated ionic liquid catalyst containing the conjunct polymer with a first noble metal catalyst under first hydrogenation conditions to form a first stream comprising conjunct polymer-depleted ionic liquid catalyst, wherein the first noble metal catalyst comprises a first Group VIII noble metal hydrogenation component on a first support having mesopores and macropores;
- wherein the first noble metal catalyst has an average pore diameter of 27 to 1,000 nm (0.027 to 1 μm), a total pore volume of greater than 0.80 cc/g, and a macropore volume of 0.10 to 0.50 cc/g;
- wherein the mesopores have a diameter from 2 to 50 nm, and the macropores have a second diameter from greater than 50 to 5,000 nm;
- and
- (b) recovering a recovered conjunct polymer-depleted ionic liquid catalyst from the first stream.
A process for hydro-regeneration of a deactivated ionic liquid catalyst containing a conjunct polymer, the process comprising the steps of:
- (a) contacting the deactivated ionic liquid catalyst containing the conjunct polymer with a first noble metal catalyst under first hydrogenation conditions to form a first stream comprising a conjunct polymer-depleted ionic liquid catalyst having a first conjunct polymer content, wherein the first noble metal catalyst comprises a first Group VIII noble metal hydrogenation component on a first support having mesopores and macropores;
- wherein the first noble metal catalyst has an average pore diameter of 27 to 1,000 nm (0.027 to 1 μm), a total pore volume of greater than 0.80 cc/g, and a macropore volume of 0.10 to 0.50 cc/g;
- wherein the mesopores have a diameter from 2 to 50 nm, and the macropores have a second diameter from greater than 50 to 5,000 nm;
- (b) contacting at least a portion of the first stream comprising the conjunct polymer-depleted ionic liquid catalyst with a second noble metal catalyst under second hydrogenation conditions to form a second stream comprising a second conjunct polymer-depleted ionic liquid catalyst having a second conjunct polymer content, wherein the second noble metal catalyst comprises a second Group VIII noble metal hydrogenation component on a second support having second mesopores;
- wherein the second noble metal catalyst has a second average pore diameter of less than 20 nm (0.02 μm);
- and
- (c) recovering a recovered conjunct polymer-depleted ionic liquid catalyst from the second stream.
Dependencies are inferred from the claim text.