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US 12,252,466 B2Granted
Isooctane production from field butane
AssigneeSabic Global Technologies B.V.
InventorDustin Fickel
Life of this patent
Estimating the term…
Abstract
A process for producing isooctane by introducing a butane feed stream (containing n-butane, i-butane) and hydrogen into a catalytic hydrogenolysis reactor to produce a hydrogenolysis product stream; separating the hydrogenolysis product stream into a butane stream (i-butane, optionally n-butane); feeding the butane stream to a catalytic dehydrogenation reactor to produce a dehydrogenation product stream comprising saturated and unsaturated four-carbon hydrocarbons; and feeding the dehydrogenation product stream to an oligomerization unit to produce isooctene and dehydrogenating the isooctene to produce isooctane.
Claims21
A process comprising:
- (a) introducing a butane feed stream and hydrogen to a hydrogenolysis reactor to produce a hydrogenolysis product stream, wherein the hydrogenolysis reactor comprises a hydrogenolysis catalyst, wherein the butane feed stream comprises n-butane and i-butane, wherein said catalyst having higher selectivity towards hydrogenolysis of n-butane compared to hydrogenolysis of i-butane, wherein the hydrogenolysis product stream comprises hydrogen, methane, ethane, propane, i-butane, and n-butane, and further wherein said hydrogenolysis product stream has a higher i-butane:n-butane ratio than the butane feed stream;
- (b) separating at least a portion of the hydrogenolysis product stream in a first separation unit into a first hydrogen-containing stream, a stream rich in methane, ethane and propane, and a butane stream, wherein the butane stream comprises i-butane and n-butane;
- (c) feeding at least a portion of the butane stream to a dehydrogenation reactor to produce a dehydrogenation product stream, wherein the dehydrogenation reactor comprises a dehydrogenation catalyst, and wherein the dehydrogenation product stream comprises hydrogen, i-butane, isobutylene, n-butane, 1-butene, and 2-butene,
- (d) feeding at least a portion of the dehydrogenation product stream to an oligomerization unit to produce a product stream comprising isooctene;
- and,
- (e) feeding at least a portion of the product stream comprising isooctene to a hydrogenation unit to produce isooctane.
3 more elements
A process for producing isooctane comprising:
- (a) introducing a butane feed stream and hydrogen to a hydrogenolysis reactor to produce a hydrogenolysis product stream, wherein the hydrogenolysis reactor comprises a hydrogenolysis bimetallic supported catalyst, wherein the hydrogenolysis bimetallic supported catalyst comprises Pt and Ir supported on ZSM-5, wherein the hydrogenolysis reactor is characterized by a temperature of less than about 350°C., wherein the hydrogenolysis reactor is characterized by an i-butane conversion of less than about 25%, wherein the butane feed stream comprises n-butane and i-butane, wherein the butane feed stream is characterized by a mole ratio of n-butane to i-butane of equal to or greater than about 1:1, and wherein the hydrogenolysis product stream comprises hydrogen, methane, ethane, propane, i-butane, and n-butane;
- (b) separating at least a portion of the hydrogenolysis product stream in a first separation unit into a first hydrogen-containing stream, a stream rich in methane, ethane and propane, and a first i-butane stream;
- (c) feeding at least a portion of the first i-butane stream to a dehydrogenation reactor to produce a dehydrogenation product stream, wherein the dehydrogenation reactor comprises a dehydrogenation catalyst, and wherein the dehydrogenation product stream comprises hydrogen, i-butane, and isobutylene;
- (d) separating at least a portion of the dehydrogenation product stream in a second separation unit into a second hydrogen-containing stream, a second i-butane stream, and an isobutylene stream;
- (e) feeding at least a portion of the isobutylene stream and hydrogen to an oligomerization unit to produce an isooctene-containing stream;
- and (f) feeding at least a portion of the isooctene-containing stream to a hydrogenation unit to produce isooctane.
3 more elements
Dependencies are inferred from the claim text.