The present invention provides processes for deconstructing biomass using water. The method generally includes loading a reactor with biomass and water, heating the reactor to a first deconstruction temperature and establishing a first deconstruction pressure, maintaining the reactor at the first de
The present invention provides processes for deconstructing biomass using water. The method generally includes loading a reactor with biomass and water, heating the reactor to a first deconstruction temperature and establishing a first deconstruction pressure, maintaining the reactor at the first deconstruction temperature and a first deconstruction pressure for a first deconstruction period, flushing the reactor with water, and repeating these steps one or more times after establishing a second deconstructing temperature and second deconstruction pressure.
대표청구항▼
1. A method of deconstructing biomass, the method comprising: a. loading a reactor with biomass and water;b. heating the reactor to a first deconstruction temperature and establishing a first deconstruction pressure;c. maintaining the reactor at the first deconstruction temperature and the first dec
1. A method of deconstructing biomass, the method comprising: a. loading a reactor with biomass and water;b. heating the reactor to a first deconstruction temperature and establishing a first deconstruction pressure;c. maintaining the reactor at the first deconstruction temperature and the first deconstruction pressure for a first deconstruction period;d. flushing the reactor with water;e. repeating steps (b)-(d) until the weight:weight ratio of the sum of the water used in steps (a) and (d) to biomass used in step (a) is between about 20:1 and 1:1;f. heating the reactor to a second deconstruction temperature;g. maintaining the reactor at the second deconstruction temperature and a second deconstruction pressure for a second deconstruction period;h. flushing the reactor with water; andi. repeating steps (f)-(h) until the weight:weight ratio of the sum of the water used in step (h) to biomass used in step (a) is between about 20:1 and 1:1; to produce a biomass hydrolysate comprising at least one member selected from the group consisting of a water-soluble lignocellulose derivative, a water-soluble cellulose derivative, a water-soluble hemicellulose derivative, a water-soluble lignin derivative, a carbohydrate, a starch, a monosaccharide, a disaccharide, a polysaccharide, a sugar, a sugar alcohol, an alditol, a polyol, a phenol, an ash component, and an extractive. 2. The method of claim 1 further comprising: j. heating the reactor to a third deconstruction temperature;k. maintaining the reactor at the third deconstruction temperature and a third deconstruction pressure for a third deconstruction period;l. flushing the reactor with water; andm. repeating steps (j)-(l) until the weight:weight ratio of the sum of the water used in step (l) to biomass used in step (a) is between about 20:1 and 1:1. 3. The method of claim 2 further comprising: n. heating the reactor to a fourth deconstruction temperature;o. maintaining the reactor at the fourth deconstruction temperature and a fourth deconstruction pressure for a fourth deconstruction period;p. flushing the reactor with water; andq. repeating steps (n)-(p) until the weight:weight ratio of the sum of the water used in step (p) to biomass used in step (a) is between about 20:1 and 1:1. 4. The method of claim 1 wherein the second deconstruction temperature is greater than the first deconstruction temperature. 5. The method of claim 2 wherein the second deconstruction temperature is greater than the first deconstruction temperature and the third deconstruction temperature is greater than the second deconstruction temperature. 6. The method of claim 3 wherein the second deconstruction temperature is greater than the first deconstruction temperature, the third deconstruction temperature is greater than the second deconstruction temperature, and the fourth deconstruction temperature is greater than the third deconstruction temperature. 7. The method of claim 4 wherein the first deconstruction temperature and the second deconstruction temperature are between about 70° C. and 350° C. 8. The method of claim 5 wherein the first deconstruction temperature, the second deconstruction temperature, and third deconstruction temperature are between about 70° C. and 350° C. 9. The method of claim 6 wherein the first deconstruction temperature, the second deconstruction temperature, the third deconstruction temperature, and the fourth deconstruction temperature are between about 70° C. and 350° C. 10. The method of claim 1 wherein the first deconstruction pressure is between about 100 psi and 2000 psi. 11. The method of claim 1 wherein the first deconstruction period is between about 1 minute and 3 hours. 12. The method of claim 9 wherein the first deconstruction temperature is between about 70° C. and 150° C., the second deconstruction temperature is between about 100° C. and 250° C., the third deconstruction temperature is between about 150° C. and 300° C., the fourth deconstruction temperature is between about 200° C. and 350° C., the first deconstruction pressure, second deconstruction pressure, third deconstruction pressure, and fourth deconstruction pressure are between about 100 and 2000 psi, and the first deconstruction period, the second deconstruction period, the third deconstruction period, and the fourth deconstruction period are between about 1 minute and 3 hours. 13. The method of claim 1 wherein the biomass hydrolysate comprises a sugar, a sugar alcohol, and acetic acid. 14. The method of claim 1 further comprising reacting the biomass hydrolysate with hydrogen in the presence of a deoxygenation catalyst at a deoxygenation temperature and a deoxygenation pressure to produce an oxygenate comprising a C2+O1-3 hydrocarbon in a reaction stream. 15. The method of claim 14 further comprising reacting the oxygenate in the presence of a condensation catalyst at a condensation temperature and condensation pressure to produce a product stream comprising one or more C4+ compounds. 16. A method of deconstructing biomass comprising: providing a biomass feed stream comprising water and biomass;deconstructing the biomass feed stream in a reactor at a first deconstruction temperature and a first deconstruction pressure for a first deconstruction period;flushing the reactor with water after the first deconstruction period to produce an intermediate product;deconstructing the intermediate product in the reactor at a second deconstruction temperature and a second deconstruction pressure for a second deconstruction period; andflushing the reactor with water after the second deconstruction period to produce a biomass hydrolysate comprising at least one member selected from the group consisting of a water-soluble lignocellulose derivative, a water-soluble cellulose derivative, a water-soluble hemicellulose derivative, a water-soluble lignin derivative, a carbohydrate, a starch, a monosaccharide, a disaccharide, a polysaccharide, a sugar, a sugar alcohol, an alditol, a polyol, a phenol, an ash component, and an extractive. 17. The method of claim 16 wherein deconstructing the biomass feed stream at the first deconstruction temperature and first deconstruction pressure for the first deconstruction period and flushing the reactor with water is repeated until the weight:weight ratio of the sum of the water used in the biomass feed stream and the subsequent flushing steps to biomass in the biomass feed stream is between about 20:1 and 1:1. 18. The method of claim 17 wherein the intermediate product comprises a residual biomass component. 19. The method of claim 18 wherein deconstructing the intermediate product at the second deconstruction temperature and second deconstruction pressure for the second deconstruction period and flushing the reactor with water is repeated until the mass:mass ratio of water used in flushing to biomass used in the biomass feed stream is between about 20:1 and 1:1. 20. The method of claim 16 wherein the second deconstruction temperature is greater than the first deconstruction temperature. 21. The method of claim 20 wherein the first deconstruction temperature and the second deconstruction temperature are between about 70° C. and 350° C., the first deconstruction pressure and the second deconstruction pressure are between about 100 psi and 2000 psi, and the first deconstruction period and the second deconstruction period are between about 1 minute and 3 hours. 22. The method of claim 16 further comprising: reacting the biomass hydrolysate with hydrogen in the presence of a deoxygenation catalyst at a deoxygenation temperature and a deoxygenation pressure to produce an oxygenate comprising a C2+O1-3 hydrocarbon in a reaction stream. 23. The method of claim 22 further comprising: reacting the oxygenate in the presence of a condensation catalyst at a condensation temperature and condensation pressure to produce a product stream comprising one or more C4+ compounds.
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Cortright, Randy D.; Dumesic, James A., Low-temperature hydrocarbon production from oxygenated hydrocarbons.
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