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Integrated process for separation of lignocellulosic components to fermentable sugars for production of ethanol and chemicals
Published online: Mar 31, 2008
|Subject||Modular process for ethanol production|
|Published date||Mar 6, 2008|
|Title||Integrated process for separation of lignocellulosic components to fermentable sugars for production of ethanol and chemicals|
|Patent Application Number||US20080057555 A1|
|Inventor||Nguyen; Xuan Nghinh, USA Correspondence care of XUAN N. NGUYEN, USA|
|Relevance||An integrated continuous process of producing ethanol from renewable biomass resource.|
|Type of claims||Publication|
|Overview||This patent discloses an integral, continual and modular process of conversion of biomass containing lignin, cellulose, hemicelluloses to produce ethanol. The process is cost effective and robust that involves, A) converting a mixture of both hard and soft wood into chips of 1/4 inch thickness, C) pre-hydrolyzing the wood chips in a pre-soak tank/acid impregnator, centrifuging and heating in a steam/gas mixers, E) blowing wood chips under high pressure into blow tanks to form more impregnable lignocellulosic solids, F) pressing and separating the solids product from liquor and adding lime to neutralize the pre-hydrolyates to a pH of 8-10, G) subjecting the washed lignocellulosic solids into continuous co-current delignification/deresination reactors using chemicals, H) combining the washed filtrates with other filtrates containing lignin and degradation products for evaporation, concentrating the filtrates containing lignin in evaporators to convert them into hydrocarbon fuel or by-product, or burned to generate power and steam and I) fermenting and saccharifying the cellulose to glucose and ethanol by enzymatic hydrolysis.|
|Related patent documents||
US Patent publications
US5879463 - Process for rapid acid hydrolysis of lignocellulosic material and hydrolysis reactor (1999)
|Patent Document||Full Patent Document [external link]|
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