Abstract: A gas stream comprising LPG and naphtha hydrocarbons is absorbed with a sponge absorbent to recover LPG and naphtha hydrocarbons. The gas stream may comprise stripper off gas and/or PSA tail gas. An absorbent stream may be a stripped stream. The stripper off gas stream and the stripped stream may be obtained from a stripper that is downstream of a hydroprocessing unit.

Abstract: A medium separator is used to recover a gaseous stream from a hydroprocessed liquid stream for hydrogen recovery in a hydrogen recovery unit. A medium flash drum may further remove liquid components from the gaseous stream prior to hydrogen recovery in the hydrogen recovery unit.

Abstract: A gas stream comprising LPG and naphtha hydrocarbons is absorbed with a sponge absorbent to recover LPG and naphtha hydrocarbons. The gas stream may comprise stripper off gas and/or PSA tail gas. An absorbent stream may be a stripped stream. The stripper off gas stream and the stripped stream may be obtained from a stripper that is downstream of a hydroprocessing unit.

Abstract: A process and apparatus are disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripping column and a cold stripping column. A light fractionation column fractionates naphtha from kerosene predominantly from a cold stripped stream. A heavy fractionation column fractionates diesel from unconverted oil predominantly present in a hot stripped stream. Only the hot hydroprocessing effluent is heated in a fired heater prior to entering the heavy fractionation column, resulting in substantial operating and capital savings.

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.

Abstract: A medium separator is used to recover a gaseous stream from a hydroprocessed liquid stream for hydrogen recovery in a hydrogen recovery unit. A medium flash drum may further remove liquid components from the gaseous stream prior to hydrogen recovery in the hydrogen recovery unit.

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.

Abstract: A process and apparatus are disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripping column and a cold stripping column. A light fractionation column fractionates naphtha from kerosene predominantly from a cold stripped stream. A heavy fractionation column fractionates diesel from unconverted oil predominantly present in a hot stripped stream. Only the hot hydroprocessing effluent is heated in a fired heater prior to entering the heavy fractionation column, resulting in substantial operating and capital savings.

Abstract: A process and apparatus are disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripping column and a cold stripping column. A light fractionation column fractionates naphtha from kerosene predominantly from a cold stripped stream. A heavy fractionation column fractionates diesel from unconverted oil predominantly present in a hot stripped stream. Only the hot hydroprocessing effluent is heated in a fired heater prior to entering the heavy fractionation column, resulting in substantial operating and capital savings.

Abstract: A process and apparatus are disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripping column and a cold stripping column. A light fractionation column fractionates naphtha from kerosene predominantly from a cold stripped stream. A heavy fraction column fractionates diesel from unconverted oil predominantly present in a hot stripped stream. Only the hot hydroprocessing effluent is heated in a fired heater prior to entering the heavy fractionation column, resulting in substantial operating and capital savings.

Abstract: A compound of Formula (I): wherein R3 is an aromatic functionality selected from the group consisting of Formula II and Formula III: and wherein R1, R2, R5, R6, R7, R9, and R10 are independently selected from the group consisting of an aliphatic functionality having 1 to 6 carbon atoms, an aromatic functionality having 3 to 20 carbon atoms, a cycloaliphatic functionality having 3 to 20 carbon atoms, a hydroxy group, a halogen group, and a cyano group; R4 is an aliphatic functionality having 1 to 6 carbon atoms; R8 is an aliphatic functionality having 1 to 6 carbon atoms; “n” has a value of 0 to 4; “m” has a value of 0 to 2; “p” has a value of 0 to 2; “u” has a value of 0 to 2; “q” has a value of 0 to 3; “t” has a value of 0 to 4; and “r” has a value of 0 to 5.

Abstract: A compound of Formula (I): wherein R3 is an aromatic functionality selected from the group consisting of Formula II and Formula III: and wherein R1, R2, R5, R6, R7, R9, and R10 are independently selected from the group consisting of an aliphatic functionality having 1 to 6 carbon atoms, an aromatic functionality having 3 to 20 carbon atoms, a cycloaliphatic functionality having 3 to 20 carbon atoms, a hydroxy group, a halogen group, and a cyano group; R4 is an aliphatic functionality having 1 to 6 carbon atoms; R8 is an aliphatic functionality having 1 to 6 carbon atoms; “n” has a value of 0 to 4; “m” has a value of 0 to 2; “p” has a value of 0 to 2; “u” has a value of 0 to 2; “q” has a value of 0 to 3; “t” has a value of 0 to 4; and “r” has a value of 0 to 5.