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US 8,350,108 B2Granted
Synthesis of liquid fuels from biomass
AssigneeVirent, Inc.
InventorsRandy D. Cortright, Paul G. Blommel, Michael J. Werner, Matthew R. Vanstraten
Life of this patent
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Abstract
Processes and reactor systems are provided for the conversion of oxygenated hydrocarbons to paraffins useful as liquid fuels. The process involves the conversion of water soluble oxygenated hydrocarbons to oxygenates, such as alcohols, furans, ketones, aldehydes, carboxylic acids, diols, triols, and/or other polyols, followed by the subsequent conversion of the oxygenates to paraffins by dehydration and alkylation. The oxygenated hydrocarbons may originate from any source, but are preferably derived from biomass.
Claims57
A method of making C6+ paraffins comprising:
- catalytically reacting hydrogen, water and water soluble oxygenated hydrocarbons comprising C2+O2+ hydrocarbons in the presence of a deoxygenation catalyst at a deoxygenation temperature and deoxygenation pressure to produce an oxygenate comprising C2+O1-3 hydrocarbons, wherein the C2+O2+ hydrocarbon comprises a member selected from the group consisting of a sugar alcohol, a sugar, a monosaccharide, a disaccharide, a polysaccharide, a cellulosic derivative, a lignocellulosic derivative, or a mixture of any two or more of the foregoing;
- catalytically reacting the C2+O1-3 hydrocarbons in the presence of a dehydration catalyst at a dehydration temperature and dehydration pressure to produce a reaction stream comprising C2+ olefins;
- and
- reacting the C2+ olefins with a stream of C4+ isoparaffins in the presence of an alkylation catalyst at an alkylation temperature and alkylation pressure to produce a product stream comprising C6+ paraffins.
1 more element
A method of making a C6+ paraffins comprising:
- catalytically reacting hydrogen, water and water soluble oxygenated hydrocarbons comprising C2+O2+ hydrocarbons in the presence of a deoxygenation catalyst at a deoxygenation temperature and deoxygenation pressure to produce an oxygenate comprising C2+O1-3 hydrocarbons and one or more C4+ normal paraffins, aromatics and/or naphthenes, wherein the C2+O2+ hydrocarbon comprises a member selected from the group consisting of a sugar alcohol, a sugar, a monosaccharide, a disaccharide, a polysaccharide, a cellulosic derivative, a lignocellulosic derivative, or a mixture of any two or more of the foregoing;
- collecting a portion of the C4+ normal paraffins, aromatics and/or naphthenes and catalytically reacting the C4+ normal paraffins, aromatics and/or naphthenes in the presence of an isomerization catalyst to produce a stream of C4+ isoparaffins;
- catalytically reacting the C2+O1-3 hydrocarbons in the presence of a dehydration catalyst at a dehydration temperature and dehydration pressure to produce a reaction stream comprising C2+ olefins;
- and
- catalytically reacting the C2+ olefins with the C4+ isoparaffins in the presence of an alkylation catalyst at an alkylation temperature and alkylation pressure to produce a product stream comprising C6+ paraffins.
2 more elements
A method of making a C6+ paraffins comprising:
- catalytically reacting hydrogen, water and water soluble oxygenated hydrocarbons comprising C2+O2+ hydrocarbons in the presence of a deoxygenation catalyst at a deoxygenation temperature and deoxygenation pressure to produce an oxygenate comprising C2+O1-3 hydrocarbons, wherein the C2+O2+ hydrocarbon comprises a member selected from the group consisting of a sugar alcohol, a sugar, a monosaccharide, a disaccharide, a polysaccharide, a cellulosic derivative, a lignocellulosic derivative, or a mixture of any two or more of the foregoing;
- catalytically reacting the C2+O1-3 hydrocarbons in the presence of a dehydration catalyst at a dehydration temperature and dehydration pressure to produce a reaction stream comprising C2+ olefins and one or more C4+ normal paraffins, aromatics and/or naphthenes;
- collecting a portion of the C4+ normal paraffins, aromatics and/or naphthenes and catalytically reacting the C4+ normal paraffins, aromatics and/or naphthenes in the presence of an isomerization catalyst to produce a stream of C4+ isoparaffins;
- and
- catalytically reacting the C2+ olefins with the C4+ isoparaffins in the presence of an alkylation catalyst at an alkylation temperature and alkylation pressure to produce a product stream comprising C6+ paraffins.
2 more elements
Dependencies are inferred from the claim text.