Initial hydrotreating of naphthenes with subsequent high temperature reforming
AssigneeUop LLC
InventorsMark D. Moser, David A. Wegerer, Manuela Serban, Kurt M. VandenBussche
Life of this patent
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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.
Claims20
A process for increasing the yields of aromatics from a hydrocarbon feedstream, comprising:
- passing the hydrocarbon feedstream and a recycle gas to a first reactor to generate a first effluent stream having a reduced naphthenic content;
- passing the first effluent stream to a separator to create a light hydrocarbon stream, comprising C7 and lighter hydrocarbons, and a heavy hydrocarbon stream, comprising C8 and heavier hydrocarbons;
- passing the heavy stream to a second reactor system to generate a second effluent stream having increased aromatics compounds;
- passing the second effluent stream and the light overhead stream to a third reactor system to generate a third effluent stream comprising aromatics;
- and
- passing the third effluent stream to a reformate splitter to generate an overhead stream comprising C7 and lighter aromatics and hydrocarbons, and a bottoms stream comprising C8 and heavier aromatics and hydrocarbons.
A process for increasing the yields of aromatics from a hydrocarbon feedstream, comprising:
- passing the hydrocarbon feedstream and a recycle gas to a reforming reactor to generate a dehydrogenated hydrocarbon stream having a reduced naphthenic content;
- passing the reduced naphthenic content stream 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 bottoms stream to a second reforming reactor system to generate a second reactor system effluent;
- and
- passing the second reactor effluent and the overhead stream to the a third reforming 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 and a recycle gas to a dehydrogenation reactor to generate a dehydrogenated hydrocarbon stream having a reduced naphthenic content;
- passing the dehydrogenated hydrocarbon stream to a separator to create a light hydrocarbon stream, comprising C7 and lighter hydrocarbons, and a heavy hydrocarbon stream, comprising C8 and heavier hydrocarbons;
- passing the light stream to a first reforming reactor system to generate a first reformate stream comprising C6 and C7 aromatic compounds;
- passing the heavy stream to a second reforming reactor system to generate a second reformate stream comprising aromatics;
- and
- passing the first reformate stream and the second reformate stream to a reformate splitter to generate an overhead stream comprising C7 and lighter aromatics and hydrocarbons, and a bottoms stream comprising C8 and heavier aromatics and hydrocarbons.
Dependencies are inferred from the claim text.