Cellulose pretreatment process
    1.
    发明授权
    Cellulose pretreatment process 有权
    纤维素预处理工艺

    公开(公告)号:US08287651B2

    公开(公告)日:2012-10-16

    申请号:US12560843

    申请日:2009-09-16

    IPC分类号: C13K1/02

    摘要: A process for the production of ethanol from biomass is disclosed. The process relates to the pretreatment of corncob biomass and includes the steps of exposing corncob to steam in a reaction vessel at an elevated temperature and reaction pressure for a preselected exposure time. Volatile compounds are continuously vented during pretreatment. The reaction pressure is released for explosive decomposition of the corncob biomass into fibrous solids and condensate. The exposure is preferably carried out at a temperature of 190-210° C. and a pressure of 190 psig to 275 psig and an exposure time of 3 to 10 minutes.

    摘要翻译: 公开了一种从生物质生产乙醇的方法。 该方法涉及玉米芯生物质的预处理,包括以下步骤:将玉米芯在高温和反应压力下在反应容器中暴露于蒸汽中以进行预选的曝光时间。 挥发性化合物在预处理过程中持续排出。 释放反应压力以将玉米芯生物质炸药分解成纤维状固体和冷凝物。 曝光优选在190-210℃的温度和190psig至275psig的压力和3至10分钟的曝光时间下进行。

    CELLULOSE PRETREATMENT PROCESS
    2.
    发明申请
    CELLULOSE PRETREATMENT PROCESS 有权
    纤维素预处理工艺

    公开(公告)号:US20100065128A1

    公开(公告)日:2010-03-18

    申请号:US12560843

    申请日:2009-09-16

    IPC分类号: F17D1/00

    摘要: A process for the production of ethanol from biomass is disclosed. The process relates to the pretreatment of corncob biomass and includes the steps of exposing corncob to steam in a reaction vessel at an elevated temperature and reaction pressure for a preselected exposure time. Volatile compounds are continuously vented during pretreatment. The reaction pressure is released for explosive decomposition of the corncob biomass into fibrous solids and condensate. The exposure is preferably carried out at a temperature of 190-210° C. and a pressure of 190 psig to 275 psig and an exposure time of 3 to 10 minutes.

    摘要翻译: 公开了一种从生物质生产乙醇的方法。 该方法涉及玉米芯生物质的预处理,包括以下步骤:将玉米芯在高温和反应压力下在反应容器中暴露于蒸汽中以进行预选的曝光时间。 挥发性化合物在预处理过程中持续排出。 释放反应压力以将玉米芯生物质炸药分解成纤维状固体和冷凝物。 曝光优选在190-210℃的温度和190psig至275psig的压力和3至10分钟的曝光时间下进行。

    Conditioning of biomass for improved C5/C6 sugar release prior to fermentation
    3.
    发明授权
    Conditioning of biomass for improved C5/C6 sugar release prior to fermentation 有权
    调节发酵前改善C5 / C6糖释放的生物量

    公开(公告)号:US09150936B2

    公开(公告)日:2015-10-06

    申请号:US13547508

    申请日:2012-07-12

    IPC分类号: C13K13/00 C13K1/02

    CPC分类号: C13K1/02 C12P2201/00

    摘要: Disclosed is an improvement in a conventional process for C5 and C6 sugar recovery from lignocellulosic biomass for fermentation to ethanol, which process including the conventional steps of pretreatment of the biomass with steam at elevated temperature and pressure, collection of C5 sugars from hemicellulose breakdown, cellulose hydrolysis and collection of C6 sugars from cellulose breakdown. The improvement includes conditioning of the biomass prior to the pretreatment step by heating the biomass with steam for a time period between 5 minutes to 60 minutes to achieve a steam treated biomass having a temperature of about 80 to 100° C.; and adjusting a moisture content of the steam treated biomass to about 45% to 80%. An increased recovery of C5 and C6 sugars is achieved compared to the conventional process.

    摘要翻译: 公开了用于发酵到乙醇的木质纤维素生物质的C5和C6糖回收的常规方法的改进,该方法包括在高温和高压下用蒸汽预处理生物质的常规步骤,从半纤维素分解中收集C5糖,从纤维素分解中收集C5糖 从纤维素分解中水解和收集C6糖。 改进包括在预处理步骤之前通过用蒸汽加热生物质在5分钟至60分钟之间的时间段来调节生物质,以实现温度为约80至100℃的经蒸汽处理的生物质; 并将蒸汽处理的生物质的水分含量调节至约45%至80%。 与常规方法相比,实现了C5和C6糖的增加的恢复。

    FRACTIONATION OF BIOMASS FOR CELLULOSIC ETHANOL AND CHEMICAL PRODUCTION
    4.
    发明申请
    FRACTIONATION OF BIOMASS FOR CELLULOSIC ETHANOL AND CHEMICAL PRODUCTION 审中-公开
    生物质的分解用于纤维素乙醇和化学生产

    公开(公告)号:US20100313882A1

    公开(公告)日:2010-12-16

    申请号:US12766599

    申请日:2010-04-23

    IPC分类号: C13K1/02

    摘要: A process is defined for the continuous steam pretreatment and fractionation of corn cobs and low lignin lignocellulosic biomass to produce a concentrated cellulose solid stream that is sensitive to enzymatic hydrolysis. Valuable chemicals are recovered by fractionating the liquid and vapor stream composed of hydrolysis and degradation products of the hemicellulose. Cellulosic derived glucose is produced for fermentation to biofuels. A hemicellulose concentrate is recovered that can be converted to value added products including ethanol.

    摘要翻译: 定义了一种用于玉米芯和低木质素木质纤维素生物质的连续蒸汽预处理和分馏以产生对酶水解敏感的浓缩纤维素固体物流的方法。 通过分离由半纤维素的水解和降解产物组成的液体和蒸汽流来回收有价值的化学品。 生产用于发酵的生物燃料的纤维素衍生的葡萄糖。 回收可以转化成包括乙醇在内的增值产品的半纤维素浓缩物。

    Ethanol production with two stage continuous steam pre-treatment of lignocellulosic biomass
    6.
    发明授权
    Ethanol production with two stage continuous steam pre-treatment of lignocellulosic biomass 有权
    乙醇生产与两阶段连续蒸汽预处理木质纤维素生物质

    公开(公告)号:US09255189B2

    公开(公告)日:2016-02-09

    申请号:US13554601

    申请日:2012-07-20

    IPC分类号: C12S3/02 C08B37/00 C08H8/00

    摘要: Disclosed is a method of producing ethanol from lignocellulosic biomass, including a two stage steam pretreatment process. The first stage of the steam pretreatment is carried out by heating the biomass with high pressure steam to a first stage temperature of 140° C. to 180° C. for a first stage time of 30 minutes to 2 hours at a first stage pressure of 105 to 150 psig; and the second steam pretreatment stage is carried out by heating the biomass with high pressure steam to raise the biomass temperature to a second stage temperature of 190° C. to 210° C. for a second stage time of 2 to 10 minutes at a second stage pressure of 167 to 262 psig. Hemicellulose and inhibitors (inhibitory compounds) to downstream hydrolysis and fermentation are preferably removed between the first and second pretreating stages, more preferably after each pretreatment stage.

    摘要翻译: 公开了一种从木质纤维素生物质生产乙醇的方法,包括两阶段蒸汽预处理方法。 蒸汽预处理的第一阶段是通过用高压蒸汽将生物质加热至140℃至180℃的第一阶段温度进行,第一阶段时间为30分钟至2小时,在第一阶段的压力 105至150 psig; 并且通过用高压蒸汽加热生物质来进行第二蒸汽预处理阶段,以将生物质温度升至190℃至210℃的第二阶段温度,第二阶段时间为2至10分钟 阶段压力为167至262psig。 优选在第一和第二预处理阶段之间去除下游水解和发酵的半纤维素和抑制剂(抑制化合物),更优选在每个预处理阶段之后。

    Process for alcoholic fermentation of lignocellulosic biomass
    7.
    发明授权
    Process for alcoholic fermentation of lignocellulosic biomass 有权
    木质纤维素生物质酒精发酵工艺

    公开(公告)号:US08642303B2

    公开(公告)日:2014-02-04

    申请号:US12644935

    申请日:2009-12-22

    CPC分类号: C12P7/10 Y02E50/16 Y02E50/17

    摘要: A process for the production of ethanol wherein a hydrolyzed lignocellulosic biomass is fermented in the presence of a stillage residue. The fermentation of cellulosic hydrolysates is improved by adding prior to and/or during fermentation a stillage residue side stream from a corn starch-to-ethanol process as a nutrient source for the yeast organisms used in the fermentation. Stillage residues from the grain dry mill ethanol producing process, including the whole stillage, wet cake, thin stillage, and/or syrup are added to assist as a nitrogen and nutrient source for the fermentive processes. The stillage residue is produced by any grain-to-ethanol process.

    摘要翻译: 一种生产乙醇的方法,其中水解的木质纤维素生物质在釜馏残渣存在下发酵。 纤维素水解产物的发酵通过在发酵之前和/或发酵过程中添加作为用于发酵的酵母生物的营养源的玉米淀粉 - 乙醇方法的釜渣残留物流进行改进。 添加来自谷物干磨乙醇生产过程的残留物,包括整个釜渣,湿饼,薄釜渣和/或糖浆,以辅助作为发酵过程的氮和营养源。 釜渣残留物通过任何谷物 - 乙醇方法生产。