Production of low sulfur/low nitrogen hydrocrackates

Details Production of low sulfur/low nitrogen hydrocrackates Production of low sulfur/low nitrogen hydrocrackates

2005-03-08

2005-03-08

Griffin, Walter D. (Department: 1764)

Mineral oils: processes and products

Refining

Sulfur removal

C208S21600R, C208S108000, C208S215000, C208S25400R, C208S217000, C208S113000, C208S111350

Reexamination Certificate

active

06863803

ABSTRACT:
A two stage hydrodesulfurizing process for producing low sulfur distillates. A distillate boiling range feedstock containing in excess of about 3,000 wppm sulfur is hydrodesulfurized in a first hydrodesulfurizing stage containing one or more reaction zones in the presence of hydrogen and a hydrodesulfurizing catalyst. The liquid product stream thereof is passed to a first separation stage wherein a vapor phase product stream and a liquid product stream are produced. The liquid product stream, which has a substantially lower sulfur and nitrogen content than the original feedstream is passed to a second hydrodesulfurizing stage also containing one or more reaction zones where it is reacted in the presence of hydrogen and a second hydrodesulfurizing catalyst at hydrodesulfurizing conditions. The catalyst in any one or more reaction zones is a bulk multimetallic catalyst comprised of at lease one Group VIII non-noble metal and at least two Group VIB metals.

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