Patent ID: 8747653

Claim:
A process for hydroprocessing two hydrocarbon streams comprising: compressing a make-up hydrogen stream in a first compressor to provide a first compressed make-up hydrogen stream; compressing a first portion of the first compressed make-up hydrogen stream in a second compressor to provide a second compressed make-up hydrogen stream; taking a second portion of the first compressed make-up hydrogen stream as a second hydroprocessing hydrogen stream; hydroprocessing a first hydrocarbon stream in the presence of a first hydroprocessing hydrogen stream comprising the second compressed make-up hydrogen stream and a first hydroprocessing catalyst to provide a first hydroprocessing effluent stream; hydroprocessing a second hydrocarbon stream in the presence of the second hydroprocessing hydrogen stream comprising the first compressed make-up hydrogen stream and a second hydroprocessing catalyst to provide a second hydroprocessing effluent stream; separating said second hydroprocessing effluent stream to provide a vaporous second hydroprocessing effluent stream; adding said vaporous second hydroprocessing effluent stream to said first portion of said first compressed make-up hydrogen stream upstream of the second compressor; and letting down said first portion of the first compressed make-up hydrogen stream before adding said vaporous second hydroprocessing effluent stream thereto.