US 12,528,999 B2 · Sustainable jet fuel and process

Abstract

Described are new processes for making sustainable jet fuels and components thereof, based upon generating bio-ethylene by dehydration of biomass ethanol or a bio-syngas ethanol, and subsequently employing a tailored selection of oligomerization, cyclization, and hydrogenation reactions to generate each class of compounds which can be used as components in a sustainable aviation fuel. For example bio-ethylene oligomerization can provide olefin oligomers which can be hydrogenated to linear and branched paraffins, these paraffins can be cyclized to form bio-sourced aromatic compounds which subsequently can be hydrogenated to form cycloparaffins or naphthenes. These compounds can be blended to provide sustainable products in the kerosene jet fuel range (C8-C16) or wide-cut jet fuel range (C5-C15 or C4-C16).

Claims36

Dependent claims

A process for making a sustainable jet fuel, the process comprising:

(a) providing a bio-ethylene feed, at least a portion of which is derived from a biomass ethanol or a bio-syngas ethanol;
(b) contacting the bio-ethylene feed with a first oligomerization catalyst system to form a first oligomerization product comprising at least one C4 to C16 alpha-olefin;
(c) contacting a first portion of the first oligomerization product with a second oligomerization catalyst system to provide a second oligomerization product comprising C16-olefins;
(d) separating a second portion of the first oligomerization product prior to contacting the first portion of the first oligomerization product with the second oligomerization catalyst system;
(e) combining the second portion of the first oligomerization product from step (d) with the second oligomerization product from step (c) to form a mixture;
and
(f) hydrogenating the mixture of the second portion of the first oligomerization product and the second oligomerization product in the presence of a first hydrogenation catalyst to provide a first C16-paraffin stream.

4 more elements

A process for making a sustainable jet fuel, the process comprising:

(a) providing a bio-ethylene feed, at least a portion of which is derived from a biomass ethanol or a bio-syngas ethanol;
(b) contacting the bio-ethylene feed with a first oligomerization catalyst system to form a first oligomerization product comprising at least one C4 to C16 alpha-olefin;
(c) contacting a first portion of the first oligomerization product with a second oligomerization catalyst system to provide a second oligomerization product comprising C16-olefins;
(d) hydrogenating the second oligomerization product in the presence of a first hydrogenation catalyst to provide a first C16-paraffin stream;
(e) separating a C6 to C8 aliphatic hydrocarbon stream comprising at least one C6 to C8 alpha-olefin and/or C6 to C8 paraffin from the first oligomerization product;
(f) contacting the C6 to C8 aliphatic hydrocarbon stream with a reforming catalyst to provide a C6 to C8 aromatic hydrocarbon stream;
and
(g) hydrogenating at least a portion of the C6 to C8 aromatic hydrocarbon stream in the presence of a third hydrogenation catalyst to form a C6 to C8 cycloparaffin stream.

5 more elements

A process for making a sustainable jet fuel, the process comprising:

(i) providing a bio-ethylene feed, at least a portion of which is derived from a biomass ethanol or a bio-syngas ethanol;
(ii) contacting the bio-ethylene feed with a first oligomerization catalyst system to form a first oligomerization product comprising at least one C4 to C16 alpha-olefin;
(iii) contacting a first portion of the first oligomerization product with a second oligomerization catalyst system to provide a second oligomerization product comprising C16-olefins;
and
(iv) hydrogenating the second oligomerization product in the presence of a first hydrogenation catalyst to provide a first C16-paraffin stream;
wherein the first oligomerization catalyst system and the second oligomerization catalyst system, independently, comprise:
(a) a chromium-containing compound, a pyrrole compound, an organoaluminum compound, and optionally a halide containing compound;
(b) a chromium-containing compound, a diphosphino aminyl compound, an organoaluminum compound;
(c) a chromium-containing compound complexed to a diphosphino aminyl compound, and an organoaluminum compound;
(d) a chromium-containing compound, an N2-phosphinyl amidine compound, and an organoaluminum compound;
(e) a chromium-containing compound complexed to an N2-phosphinyl amidine compound, and an organoaluminum compound;
(f) a chromium-containing compound, an N2-phosphinyl formamidine compound, an organoaluminum compound;
(g) a chromium-containing compound complexed to an N2-phosphinyl formamidine compound, and an organoaluminum compound;
or
(h) any combinations thereof.

12 more elements

Dependencies are inferred from the claim text.

Sustainable jet fuel and process

Life of this patent

Sustainable jet fuel and process

Life of this patent

Abstract

Claims36