Methods and systems for generating polyols
First Claim
1. A method of generating an oxygenated compound, the method comprising the steps of:
- a) contacting a first catalytic material comprising one or more Group VIII metals with a first portion of an aqueous feedstock solution comprising water and at least one water-soluble oxygenated hydrocarbon having two or more carbon atoms, at;
i. a temperature of about 80°
C. to 400°
C.;
ii. a weight hourly space velocity of at least about 1.0 gram of the oxygenated hydrocarbon per gram of the first catalytic material per hour; and
iii. a pressure where at least a portion of the water and the oxygenated hydrocarbons are condensed liquids, to produce an aqueous phase reforming (APR) stream that comprises hydrogen and at least one of carbon dioxide and carbon monoxide; and
b) reacting the APR stream with a second portion of the feedstock solution over a second catalytic material, the second catalytic material different than the first catalytic material and selected from the group consisting of;
iron, ruthenium, copper, rhenium, cobalt, nickel, alloys thereof, and mixtures thereof, at;
i. a temperature of about 100°
C. to 300°
C.; and
ii. a pressure of about 200 psig to about 1200 psig, to produce a reaction product comprising one or more oxygenated compounds selected from the group consisting of a polyol, a ketone, an aldehyde, a carboxylic acid and an alcohol.
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Accused Products
Abstract
Disclosed are methods for generating propylene glycol, ethylene glycol and other polyols, diols, ketones, aldehydes, carboxylic acids and alcohols from biomass using hydrogen produced from the biomass. The methods involve reacting a portion of an aqueous stream of a biomass feedstock solution over a catalyst under aqueous phase reforming conditions to produce hydrogen, and then reacting the hydrogen and the aqueous feedstock solution over a catalyst to produce propylene glycol, ethylene glycal and the other polyols, diols, ketones, aldehydes, carboxylic acids and alcohols. The disclosed methods can be run at lower temperatures and pressures, and allows for the production of oxygenated hydrocarbons without the need for hydrogen from an external source.
147 Citations
28 Claims
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1. A method of generating an oxygenated compound, the method comprising the steps of:
-
a) contacting a first catalytic material comprising one or more Group VIII metals with a first portion of an aqueous feedstock solution comprising water and at least one water-soluble oxygenated hydrocarbon having two or more carbon atoms, at; i. a temperature of about 80°
C. to 400°
C.;ii. a weight hourly space velocity of at least about 1.0 gram of the oxygenated hydrocarbon per gram of the first catalytic material per hour; and iii. a pressure where at least a portion of the water and the oxygenated hydrocarbons are condensed liquids, to produce an aqueous phase reforming (APR) stream that comprises hydrogen and at least one of carbon dioxide and carbon monoxide; and b) reacting the APR stream with a second portion of the feedstock solution over a second catalytic material, the second catalytic material different than the first catalytic material and selected from the group consisting of;
iron, ruthenium, copper, rhenium, cobalt, nickel, alloys thereof, and mixtures thereof, at;i. a temperature of about 100°
C. to 300°
C.; andii. a pressure of about 200 psig to about 1200 psig, to produce a reaction product comprising one or more oxygenated compounds selected from the group consisting of a polyol, a ketone, an aldehyde, a carboxylic acid and an alcohol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 25, 26, 27)
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23. A method of generating propylene glycol comprising the step of contacting a heterogeneous catalyst comprising platinum and iron with an aqueous feedstock solution comprising water and glycerol, at:
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a) a temperature of about 100°
C. to 300°
C.;b) a weight hourly space velocity of at least about 1.0 gram of glycerol per gram of the heterogeneous catalyst per hour; and c) a pressure where the water and the glycerol remain condensed liquids to produce a reaction product comprising propylene glycol. - View Dependent Claims (24)
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28. A method of generating propylene glycol comprising the step of contacting a heterogeneous catalyst comprising platinum, ruthenium and a Group IVA metal with an aqueous feedstock solution comprising water and glycerol, at:
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a) a temperature of about 100°
C. to 300°
C.;b) a weight hourly space velocity of at least about 1.0 gram of glycerol per gram of the heterogeneous catalyst per hour; and c) a pressure where the water and the glycerol remain condensed liquids to produce a reaction product comprising propylene glycol.
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Specification