Initial hydrotreating of naphthenes with subsequent high temperature reforming
AssigneeUop LLC
InventorsMark D. Moser, David A. Wegerer, Manuela Serban, Kurt M. VandenBussche
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Abstract
A process for the production of aromatics through the reforming of a hydrocarbon stream is presented. The process utilizes the differences in properties of components within the hydrocarbon stream to increase the energy efficiency. The differences in the reactions of different hydrocarbon components in the conversion to aromatics allows for different treatments of the different components to reduce the energy used in reforming process.
Claims19
A process for increasing the yields of aromatics from a hydrocarbon feedstream, comprising:
- passing the hydrocarbon feedstream to a fractionation unit to generate an overhead stream comprising C7 and lighter hydrocarbons, and a bottoms stream comprising C8 and heavier hydrocarbons;
- passing the overhead stream to a dehydrogenation reactor to generate a dehydrogenated stream having a reduced naphthenic content;
- passing the bottoms stream to a first reactor system to generate a first effluent stream;
- passing the first reactor effluent to a second reactor system, and the dehydrogenated overhead stream to the second reactor system to generate an aromatics effluent stream.
A process for increasing the yields of aromatics from a hydrocarbon feedstream, comprising:
- passing the hydrocarbon feedstream to a fractionation unit to generate an overhead stream comprising C7 and lighter hydrocarbons, and a bottoms stream comprising C8 and heavier hydrocarbons;
- passing the overhead stream and a recycle gas to a dehydrogenation reactor to generate a dehydrogenated overhead stream;
- passing the bottoms stream and a portion of the recycle gas to a first reactor system to generate a first reactor system effluent;
- passing the first reactor effluent to a second reactor system, and the dehydrogenated overhead stream to the second reactor system to generate an aromatics effluent stream, wherein the second reactor system is operated at an inlet temperature greater than or equal to the first reactor inlet temperature;
- and
- passing the aromatics effluent stream to a reformate splitter to generate a reformate splitter overhead stream comprising C7 and C6 aromatics, and a reformate splitter bottoms stream comprising C8 and heavier aromatics;
- and
- passing the reformate splitter overhead stream to an aromatics separation unit thereby generating an aromatics product stream and a raffinate stream.
Dependencies are inferred from the claim text.