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 under conditions sufficient to produce hydrogen; and
b. reacting the hydrogen with a second portion of the aqueous feedstock solution over a second catalytic material, the second catalytic material different than the first catalytic material and comprising a bi-functional catalyst selected from the group consisting of tungstated zirconia, titania zirconia, sulfated zirconia, acidic alumina, silica-alumina, heterpolyacids, and combinations thereof, under conditions sufficient to produce a reaction product comprising one or more oxygenated compounds selected from the group consisting of a diol, 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 glycol 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.
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Citations
39 Claims
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1. A method of generating an oxygenated compound, the method comprising the steps of:
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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 under conditions sufficient to produce hydrogen; and b. reacting the hydrogen with a second portion of the aqueous feedstock solution over a second catalytic material, the second catalytic material different than the first catalytic material and comprising a bi-functional catalyst selected from the group consisting of tungstated zirconia, titania zirconia, sulfated zirconia, acidic alumina, silica-alumina, heterpolyacids, and combinations thereof, under conditions sufficient to produce a reaction product comprising one or more oxygenated compounds selected from the group consisting of a diol, 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)
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15. A method of generating an oxygenated compound, the method comprising the steps of:
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a. contacting a first catalytic material comprising one or more Group VIII metals with a first portion of an aqueous feedstock solution comprising water, a recycle stream and at least one water-soluble oxygenated hydrocarbon having two or more carbon atoms under conditions sufficient to produce hydrogen; and b. reacting the hydrogen with a second portion of the aqueous feedstock solution over a second catalytic material, the second catalytic material different than the first catalytic material and comprising a bi-functional catalyst selected from the group consisting of tungstated zirconia, titania zirconia, sulfated zirconia, acidic alumina, silica-alumina, heterpolyacids, and combinations thereof, under conditions sufficient to produce an effluent stream comprising unreacted oxygenated hydrocarbons, byproducts and one or more oxygenated compounds selected from the group consisting of a diol, a ketone, an aldehyde, a carboxylic acid, an alcohol, and mixtures of at least two of the foregoing; and c. separating at least a portion of the unreacted oxygenated hydrocarbons and byproducts from the effluent stream into the recycle stream; and d. mixing at least a portion of the recycle stream with one or more water-soluble oxygenated hydrocarbons to provide the aqueous feedstock solution. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of generating an oxygenated compound, the method comprising the steps of:
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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 under conditions sufficient to produce aqueous phase reforming (APR) hydrogen; and b. reacting the APR hydrogen and a supplemental hydrogen with a second portion of the aqueous feedstock solution over a second catalytic material, the second catalytic material different than the first catalytic material and comprising a bi-functional catalyst selected from the group consisting of tungstated zirconia, titania zirconia, sulfated zirconia, acidic alumina, silica-alumina, heterpolyacids, and combinations thereof, under conditions sufficient to produce a reaction product comprising one or more oxygenated compounds selected from the group consisting of a diol, a ketone, an aldehyde, a carboxylic acid and an alcohol. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification