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US 11,708,536 B2Granted
Method for reducing fouling in catalytic cracking
AssigneeNeste Oyj
InventorsVille Paasikallio, Blanka Toukoniitty, Jukka-Pekka Pasanen
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Abstract
A method is disclosed for reducing fouling in catalytic cracking. The method includes subjecting a recycled fossil-based feedstock to a heat treatment, evaporating the heat-treated feedstock, hydrotreating resulting evaporation distillate and performing catalytic cracking of the hydrotreated distillate in a presence of a solid acid catalyst.
Claims18
A method of producing a cracking product, the method comprising:
- subjecting a recycled fossil-based feedstock containing metallic impurities and reactive components to a heat treatment;
- evaporating the heat-treated feedstock to produce distillate(s) and a residue fraction containing reacted metallic impurities of the recycled fossil-based feedstock;
- hydrotreating a fraction of the distillate(s) boiling at or above 100° C. to produce a hydrotreated distillate;
- and
- performing catalytic cracking of the hydrotreated distillate as a feed component of a feed in a presence of a solid acid catalyst;
- wherein a heating temperature during the heat treatment is at least 290° C. and wherein the heat treatment is carried out for at least 1 minute,
- wherein the heat treatment is carried out at a pressure of 2.0 bar or more,
- wherein a cracking temperature is 510° C. or more;
- and
- wherein the feed of the catalytic cracking comprises:
- a biomass-based feed component in addition to the hydrotreated distillate.
8 more elements
Dependencies are inferred from the claim text.