Patent ID: 8518351

Claim:
An apparatus for producing diesel comprising: a hydrocracking reactor in communication with one or more compressors on a make-up hydrogen line and a hydrocarbon feed line for hydrocracking the hydrocarbon stream to lower boiling hydrocarbons; a recycle gas compressor in communication with the hydrocracking reactor for compressing a vaporous hydrocracking effluent stream comprising hydrogen to provide a recycle hydrogen stream in a recycle hydrogen line, the recycle hydrogen line providing a first recycle hydrogen split line and a second recycle hydrogen split line, wherein the first recycle hydrogen split line is in upstream communication with the hydrocracking reactor to provide recycled hydrogen; a hydrotreating reactor in communication with the second recycle hydrogen split line and the hydrocracking reactor for hydrotreating a diesel stream to produce low sulfur diesel; and a warm separator in communication with the hydrotreating reactor for separating the hydrotreating effluent stream into a vaporous hydrotreating effluent stream comprising hydrogen in an overhead line and a liquid hydrotreating effluent stream in a bottoms line and the recycle gas compressor in communication with the overhead line.