Process and apparatus for hydrocracking and hydroisomerizing a hydrocarbon stream
AssigneeUop LLC
InventorsSailesh B. Kumar, Andrew J. Towarnicky, Vasant P. Thakkar, Massimo Sangalli, John A. Petri
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Abstract
A process and apparatus for quenching a hydrocracked stream to prepare it for hydroisomerization. A fractionated hydroisomerized stream is recycled to quench a hot hydrocracked stream prior to hydroisomerization. Sufficient quenching can inactivate the hydroisomerization catalyst bed. The hydroisomerization catalyst bed can be heated back to hydroisomerization temperature and can actively hydroisomerize again.
Claims20
A process for hydrocracking and hydroisomerizing a hydrocarbon stream comprising:
- hydrocracking a hydrocarbon feed stream over a first hydrocracking catalyst bed to provide a hydrocracked stream;
- hydroisomerizing said hydrocracked stream over a first hydroisomerization catalyst bed to provide a hydroisomerized stream;
- fractionating said hydroisomerized stream in a fractionation section to provide a first fractionated stream;
- and
- recycling a first fractionated stream to said first isomerization catalyst bed to quench said hydrocracked stream.
A process for hydrocracking and hydroisomerizing a hydrocarbon stream comprising:
- hydrocracking a hydrocarbon feed stream over a first hydrocracking catalyst bed in a first reactor to provide a hydrocracked stream;
- hydroisomerizing said hydrocracked stream over a first hydroisomerization catalyst bed in said first reactor to provide a hydroisomerized stream;
- fractionating a first effluent stream from said first reactor to provide a first fractionated stream and a second fractionated stream;
- recycling said first fractionated stream to said first isomerization catalyst bed in said first reactor to quench said hydrocracked stream;
- and
- hydrocracking said second fractionated stream over a second hydrocracking catalyst bed in a second reactor to provide a second hydrocracked stream.
An apparatus for hydrocracking and hydroisomerizing a hydrocarbon stream comprising:
- a first hydrocracking reactor having a first inlet to said first hydrocracking reactor and an intermediate inlet to said first hydrocracking reactor downstream of said first inlet;
- a fractionation section downstream of the first hydrocracking reactor;
- and
- said intermediate inlet to said first hydrocracking reactor in downstream communication with said fractionation section.
Dependencies are inferred from the claim text.