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US 9,809,763 B2Granted
Process and apparatus for recovering hydrotreated hydrocarbons with two strippers
AssigneeUop LLC
InventorsKiran Ladkat, Richard K. Hoehn, Hemant Mahajan
Life of this patent
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Abstract
A process and apparatus is disclosed for recovering hydrotreating effluent from a hydrotreating unit utilizing a hot stripper and a cold stripper. Only the hot hydrotreating effluent is heated in a fired heater prior to product fractionation, resulting in substantial operating and capital savings. The cold stripped stream from the cold stripper bottoms line may be passed directly to a diesel pool when VGO is hydrotreated in the hydrotreating reactor bypassing the product fractionation column.
Claims13
A hydrotreating process comprising:
- hydrotreating a hydrocarbon feed stream in a hydrotreating reactor to provide hydrotreating effluent stream;
- separating said hydrotreating effluent stream into a cold separator stream and a hot separator stream;
- stripping said cold separator stream in a cold stripper column to provide a cold stripped stream;
- stripping said hot separator stream in a hot stripper column to provide a hot stripped stream;
- fractionating said hot stripped stream in a product fractionation column;
- bypassing said cold stripped stream around said product fractionation column;
- and
- recycling a condensed overhead stream from said product fractionation column to said cold stripper column.
5 more elements
A hydrotreating process comprising:
- hydrotreating a hydrocarbon feed stream in a hydrotreating reactor to provide hydrotreating effluent stream;
- separating said hydrotreating effluent stream into a cold separator stream and a hot separator stream;
- stripping said cold separator stream in a cold stripper column to provide a cold stripped stream;
- stripping said hot separator stream in a hot stripper column to provide a hot stripped stream;
- fractionating said hot stripped stream in a product fractionation column operating at pressure of between about 13 kPa(a) and about 67 kPa(a);
- and
- passing said cold stripped stream around said product fractionation column to a diesel pool.
4 more elements
Dependencies are inferred from the claim text.