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US 11,577,235 B1Granted
Layered catalyst reactor systems and processes for hydrotreatment of hydrocarbon feedstocks
AssigneeChevron U.S.A. Inc.
InventorsAxel Brait, Xiaoying Ouyang, Alexander Kuperman, Theodorus Ludovicus Michael Maesen
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Abstract
A layered catalyst reactor system and process for hydrotreatment of hydrocarbon feedstocks. The layered catalyst system reactors comprise vertical bed layers including a demetallization catalyst layer, multiple layers of supported hydrotreating catalyst layer, and multiple alternating layers of supported hydrocracking catalysts and self-supported hydrotreating catalysts. The arrangement of the catalyst layers mitigates the risk of temperature run-aways, with improvements in hydrotreatment performance.
Claims21
A layered catalyst reactor system comprising a vertical bed or stack of catalyst layers arranged from top to bottom in the following order:
- (i) a layer comprising one or more demetallization catalysts;
- (ii) a layer of one or more supported hydrotreating catalysts;
- (iii) a layer of one or more supported hydrocracking catalysts;
- (iv) a layer of one or more self-supported hydrotreating catalysts;
- (v) a layer of one or more supported hydrocracking catalysts;
- (vi) a layer of one or more self-supported hydrotreating catalysts;
- (vii) a layer of one or more supported hydrotreating catalysts;
- wherein the total volume of the two layers comprising one or more self-supported hydrotreating catalysts is about 10 to about 50% of the total volume of catalysts in the vertical bed;
- and
- wherein the total volume of the two layers comprising one or more supported hydrocracking catalysts is about 10 to about 30% of the total volume of catalysts in the vertical bed.
7 more elements
A layered catalyst reactor system comprising a vertical bed or stack of catalyst layers arranged from top to bottom in the following order:
- (i) a layer comprising one or more demetallization catalysts;
- (ii) a layer of one or more supported hydrotreating catalysts;
- (iii) a layer of one or more supported hydrocracking catalysts;
- (iv) a layer of one or more self-supported hydrotreating catalysts;
- (v) a layer of one or more supported hydrocracking catalysts;
- (vi) a layer of one or more self-supported hydrotreating catalysts;
- (vii) a layer of one or more supported hydrocracking catalysts;
- (viii) a layer of one or more self-supported hydrotreating catalysts;
- (ix) a layer of one or more supported hydrotreating catalysts;
- wherein the total volume of the three layers comprising one or more self-supported hydrotreating catalysts is about 9 to about 45% of the total volume of catalysts in the vertical bed;
- and
- wherein the total volume of the three layers comprising one or more supported hydrocracking catalysts is about 15 to about 30% of the total volume of catalysts in the vertical bed.
9 more elements
A process for hydrotreatment of hydrocarbon feedstocks comprising:
- (i) contacting a hydrocarbon feedstock which contains contaminants comprised of metals, sulfur, nitrogen and olefins with a layered catalyst reactor system in the presence of hydrogen to produce hydrocarbon product having a lower content of metals sulfur, nitrogen and olefins than the hydrocarbon feedstock;
- (ii) passing the hydrocarbon feedstock sequentially through the layers of the layered catalyst reactor system vertically from top to bottom;
- and (iii) recovering the hydrocarbon product from the bottom of the layered catalyst reactor system;
- wherein the layered catalyst system comprises a vertical bed or stack of catalyst layers arranged from top to bottom in the following order:
- (i) a layer comprising one or more demetallization catalysts;
- (ii) a layer of one or more supported hydrotreating catalysts;
- (iii) a layer of one or more supported hydrocracking catalysts;
- (iv) a layer of one or more self-supported hydrotreating catalysts;
- (v) a layer of one or more supported hydrocracking catalysts;
- (vi) a layer of one or more self-supported hydrotreating catalysts;
- (vii) a layer of one or more supported hydrotreating catalysts;
- wherein the total volume of the two layers comprising one or more self-supported hydrotreating catalysts is about 10 to about 50% of the total volume of catalysts in the vertical bed;
- and
- wherein the total volume of the two layers comprising one or more supported hydrocracking catalysts is about 10 to about 30% of the total volume of catalysts in the vertical bed;
- or
- wherein the layered catalyst reactor system comprises a vertical bed or stack of catalyst layers arranged from top to bottom in the following order:
- (i) a layer comprising one or more demetallization catalysts;
- (ii) a layer of one or more supported hydrotreating catalysts;
- (iii) a layer of one or more supported hydrocracking catalysts;
- (iv) a layer of one or more self-supported hydrotreating catalysts;
- (v) a layer of one or more supported hydrocracking catalysts;
- (vi) a layer of one or more self-supported hydrotreating catalysts;
- (vii) a layer of one or more supported hydrocracking catalysts;
- (viii) a layer of one or more self-supported hydrotreating catalysts;
- (ix) a layer of one or more supported hydrotreating catalysts;
- wherein the total volume of the three layers comprising one or more self-supported hydrotreating catalysts is about 9 to about 45% of the total volume of catalysts in the vertical bed;
- and
- wherein the total volume of the three layers comprising one or more supported hydrocracking catalysts is about 15 to about 30% of the total volume of catalysts in the vertical bed.
25 more elements
Dependencies are inferred from the claim text.