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US 10,947,462 B2Granted
Catalyst staging in catalytic reaction process
AssigneeUop LLC
InventorsBryan J. Egolf, Ian G. Horn, David A. Wegerer, Gregory R. Werba
Life of this patent
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Abstract
A reforming process is described. The reforming process includes introducing a hydrocarbon stream comprising hydrocarbons having 5 to 12 carbon atoms into a reforming zone containing reforming catalyst, the reforming zone comprising at least two reformers, each reformer having a set of reforming operating conditions, to produce a reformate effluent, wherein the last reformer contains less catalyst than the next to the last reformer.
Claims20
A reforming process comprising:
- introducing a hydrocarbon stream comprising hydrocarbons having 5 to 12 carbon atoms into a reforming zone containing reforming catalyst, the reforming zone comprising four sequential reformers and wherein the hydrocarbon stream is introduced into the first reformer, each reformer having a set of reforming operating conditions, to produce a reformate effluent, wherein the first reformer contains about 15% to about 35% of the total catalyst, the second reformer contains about 25% to about 35% of the total catalyst, the third reformer contains about 35% to about 45% of the total catalyst, and wherein the fourth reformer contains about 10 to about 25% of the total catalyst, wherein the reforming zone has an ascending temperature profile so that the fourth reformer has the highest temperature, and wherein an operating temperature in the fourth reformer is greater than about 540° C.
A reforming process comprising:
- heating a hydrocarbon feed stream comprising hydrocarbons having 5 to 12 carbon atoms;
- introducing the heated hydrocarbon stream into a reforming zone containing reforming catalyst, the reforming zone comprising four reformers, each reformer having a set of reforming operating conditions, to produce a reformate effluent, wherein the first reformer contains about 15% to about 35% of the total catalyst, the second reformer contains about 25% to about 35% of the total catalyst, the third reformer contains about 35% to about 45% of the total catalyst, and wherein the fourth reformer contains about 10 to about 25% of the total catalyst, and wherein an LHSV of the last reformer is greater than about 10 hr−1;
- and
- passing the reformate effluent to a reformate splitter to generate a reformate overhead comprising C6 and C7 aromatics, and a bottoms stream comprising heavier hydrocarbons.
1 more element
A reforming process comprising:
- introducing a hydrocarbon stream comprising hydrocarbons having 5 to 12 carbon atoms into a reforming zone containing reforming catalyst, the reforming zone comprising four reformers, each reformer having a set of reforming operating conditions, to produce a reformate effluent, wherein the first reformer contains about 25% to about 35% of the total catalyst, the second reformer contains about 25% to about 35% of the total catalyst, the third reformer contains about 35% to about 45% of the total catalyst, and wherein the fourth reformer contains about 10 to about 25% of the total catalyst, wherein an operating temperature in the fourth reformer is greater than about 540° C. and wherein an LHSV of the fourth reformer is greater than an LHSV of any other reformer.
Dependencies are inferred from the claim text.