Alternative paths to alcohols and hydrocarbons from biomass
View Patent ↗A method of producing alcohols, hydrocarbons, or both from biomass by converting biomass into a carboxylic acid, reacting the carboxylic acid with an olefin to produce an ester and hydrogenolyzing the ester to produce alcohol. A method of producing hydrocarbons from biomass by converting at least a portion of the biomass into a carboxylic acid, a ketone, or an ammonium carboxylate salt, reacting at least one of a portion of the carboxylic acid, a portion of the ketone, or a portion of the ammonium carboxylate salt in an oligomerization reactor as at least part of a process that produces an oligomerization product and separating hydrocarbons from the oligomerization product.
1. A method of producing hydrocarbons from biomass, the method comprising:
converting at least a portion of the biomass into a carboxylic acid, a ketone, or an ammonium carboxylate salt; reacting at least one of a portion of the carboxylic acid, a portion of the ketone, or a portion of the ammonium carboxylate salt in an oligomerization reactor as at least part of a process that produces an oligomerization product; and separating hydrocarbons from the oligomerization product.
2. The method of claim 1 , further comprising: converting another portion of the carboxylic acid, another portion of the ketone, or another portion of the ammonium carboxylate salt to alcohol; and providing at least a portion of the alcohol to the oligomerization reactor for the process that produces the oligomerization product.
3. The method of claim 2 , wherein converting the another portion of the carboxylic acid into alcohol comprises: reacting the another portion of the carboxylic acid with an olefin to produce an ester; and hydrogenolyzing the ester to produce the alcohol.
4. The method of claim 2 , wherein reacting at least one of the portion of the carboxylic acid, the portion of the ketone, or the portion of the ammonium carboxylate salt in the oligomerization reactor as at least part of the process that produces the oligomerization product and converting the another portion of the carboxylic acid, the another portion of the ketone, or the another portion of the ammonium carboxylate salt to alcohol are carried out in the oligomerization reactor.
5. The method of claim 4 , wherein reacting at least one of the portion of the carboxylic acid, the portion of the ketone, or the portion of the ammonium carboxylate salt in the oligomerization reactor as at least part of the process that produces the oligomerization product and converting the another portion of the carboxylic acid, the another portion of the ketone, or the another portion of the ammonium carboxylate salt to alcohol are carried out with one catalyst.
6. The method of claim 2 , further comprising: separating a recycle stream from the oligomerization product; processing the recycle stream in a reformer to produce hydrogen; and providing a least a portion of the produced hydrogen for the process of converting the another portion of the carboxylic acid, the another portion of the ketone, or the another portion of the ammonium carboxylate salt to alcohol.
7. The method of claim 6 , wherein at least a portion of the biomass is converted to the ammonium carboxylate salt, the method further comprising: separating ammonia from the recycle stream prior to processing the recycle stream in a reformer to produce hydrogen.
8. The method of claim 6 , further comprising: separating olefins from the recycle stream prior to processing the recycle stream in a reformer to produce hydrogen; and providing the olefins to the oligomerization reactor for the process that produces the oligomerization product.
9. The method of claim 8 , wherein at least a portion of the biomass is converted to an ammonium carboxylate salt, the method further comprising: separating ammonia from the recycle stream prior to processing the recycle stream in a reformer to produce hydrogen.
10. The method of claim 2 , further comprising: separating a recycle stream from the oligomerization product; separating olefins from the recycle stream; and providing the olefins to the oligomerization reactor for the process that produces the oligomerization product.
11. The method of claim 1 , wherein at least a portion of the biomass is converted into a carboxylic acid.
12. The method of claim 1 , wherein converting at least a portion of the biomass into a carboxylic acid comprises: fermenting the biomass to produce a carboxylate salt; and converting the carboxylate salt to carboxylic acid using an acid recovery process.
13. The method of claim 1 , wherein at least a portion of the biomass is converted into a ketone.
14. The method of claim 13 , wherein converting at least a portion of the biomass into a ketone comprises: fermenting the biomass to produce a carboxylate salt; and thermally converting the carboxylate salt into the ketone.
15. The method of claim 13 , wherein converting at least a portion of the biomass into a ketone comprises: fermenting the biomass to produce a carboxylate salt; converting the carboxylate salt to carboxylic acid using an acid recovery process, and catalytically converting carboxylic acid into ketone.
16. The method of claim 13 , further comprising converting another portion of the ketone into alcohol by hydrogenating the another portion of the ketone.
17. The method of claim 1 , wherein converting at least a portion of the biomass into a ketone comprises: fermenting the biomass to produce a carboxylate salt; and producing hot ketone vapors and carbonate in a ketone reactor operated with a sweep gas.
18. The method of claim 17 wherein the sweep gas is reactive, condensable or both.
19. The method of claim 18 wherein the sweep gas comprises hydrogen or steam.
20. The method of claim 18 wherein the sweep gas comprises steam.
21. The method of claim 1 , wherein at least a portion of the biomass is converted into the ammonium carboxylate salt.
22. The method of claim 21 , wherein the conversion to ammonium carboxylate salt further comprises converting another portion of the ammonium carboxylate salt to alcohol; and providing the alcohol to the oligomerization reactor for the process that produces the oligomerization product, wherein converting the another portion of the ammonium carboxylate salt into alcohol comprises: converting the another portion of the ammonium carboxylate salt into a second carboxylic acid; reacting the second carboxylic acid with an olefin to produce an ester; and hydrogenolyzing the ester to produce the alcohol.
23. The method of claim 21 , further comprising: separating ammonia from the ammonium carboxylate salt prior to reacting the portion of the ammonium carboxylate salt in the oligomerization reactor as at least part of the process that produces the oligomerization product.
24. The method of claim 1 , wherein converting at least a portion of the biomass into a carboxylic acid, a ketone, or an ammonium carboxylate salt comprises a fermentation process in a fermenter, the method further comprising: separating a gaseous recycle stream from the oligomerization product; and providing at least a portion of the gaseous recycle stream to the fermenter.
25. The method of claim 24 , further comprising: converting another portion of the carboxylic acid, another portion of the ketone, or another portion of the ammonium carboxylate salt to alcohol; and providing the alcohol to the oligomerization reactor.
26. The method of claim 25 , wherein at least a portion of the biomass is converted into a carboxylic acid.
27. The method of claim 25 , wherein at least a portion of the biomass is converted into a ketone.
28. The method of claim 25 , wherein at least a portion of the biomass is converted into an ammonium carboxylate salt.
29. The method of claim 28 , further comprising: separating ammonia from the gaseous recycle stream prior to providing the at least a portion of the gaseous recycle stream to the fermenter.
30. The method of claim 25 , wherein reacting at least one of the portion of the carboxylic acid, the portion of the ketone, or the portion of the ammonium carboxylate salt in the oligomerization reactor as at least part of the process that produces the oligomerization product and converting the another portion of the carboxylic acid, the another portion of the ketone, or the another portion of the ammonium carboxylate salt to alcohol are carried out in the oligomerization reactor.
31. The method of claim 30 , wherein reacting at least one of the portion of the carboxylic acid, the portion of the ketone, or the portion of the ammonium carboxylate salt in the oligomerization reactor as at least part of the process that produces the oligomerization product and converting the another portion of the carboxylic acid, the another portion of the ketone, or the another portion of the ammonium carboxylate salt to alcohol are carried out with one catalyst.
32. The method of claim 25 , further comprising: separating fermenter gases exiting the fermenter; processing the fermenter gases in a reformer to produce hydrogen; and providing a least a portion of the produced hydrogen for the process of converting the another portion of the carboxylic acid, the another portion of the ketone, or the another portion of the ammonium carboxylate salt to alcohol.