Process for the production of middle distillates by two-step hydroisomerisation and hydrocracking of feeds from the Fischer-Tropsch process
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United States of America Patent
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May 22, 2007
Grant Date -
Jan 30, 2003
app pub date -
Jul 8, 2002
filing date -
Jul 6, 2001
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Abstract
The invention concerns a process for producing middle distillates from an effluent produced by a Fischer-Tropsch unit, comprising optional fractionation to obtain at least one heavy fraction with an initial boiling point in the range 120-200.degree. C., said heavy fraction or said effluent optionally being hydrotreated, then bringing it into contact with a first amorphous hydrocracking/hydroisomerization catalyst that contains at least one noble group VIII metal, the effluent obtained is distilled, then the residual fraction boiling above the middle distillates and/or a portion of the middle distillates is brought into contact with a second amorphous hydrocracking/hydroisomerization catalyst containing at least one noble group VIII metal. The invention also concerns a unit.
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