Patent ID: 6200462
Filing Date: 2001-03-13
Classification: C10G

Abstract:
An integrated hydroconversion process having at least two reaction zones in series with respect to hydrogen flow comprising:a) passing a hydrocarbon feed selected from the group consisting of a residuum, a vacuum gas oil, middle distillate and mixtures to a hydrotreating zone, contacting at hydrotreating conditions, which comprise a temperature range from about 400.degree. F. to about 900.degree. F., a pressure range from about 500 psig to about 5000 psig, a flow rate range of about 0.5 hr to about 20 hr.sup.-1 LHSV, and an overall hydrogen consumption range of from about 300 to about 5000 scf per barrel of liquid hydrocarbon feed, the hydrocarbon feed with a hydrogen feed stream in the presence of a hydrotreating catalyst, and recovering a hydrotreating zone effluent therefrom;b) separating the hydrotreating zone effluent and recovering at least a liquid fraction and a hydrogen rich gaseous stream;c) passing the liquid fraction and a portion of the hydrogen rich gaseous stream to a hydrocracking zone, contacting the liquid fraction and the portion of the hydrogen rich gaseous stream at hydrocracking conditions, which comprise a temperature range from about 400.degree. F. to about 950.degree. F., a pressure range from about 500 psig to about 5000 psig, a flow rate range of about 0.1 hr to about 15 hr.sup.-1 LHSV, and an overall hydrogen consumption range of from about 500 to about 2500 scf per barrel of liquid hydrocarbon feed, with a hydrocracking catalyst and recovering therefrom a hydrocracking zone effluent;d) passing the hydrocracking zone effluent to a vapor recovery zone and recovering from the vapor recovery zone at least a vapor stream; ande) passing the vapor stream without substantial cooling to the hydrotreating zone for combining with the hydrogen feed stream.