Continuous counter-current organosolv processing of lignocellulosic feedstocks

A technology of lignocellulose and organic solvent, applied in the field of lignofiber feedstock fractionation into components, can solve the problems of low value, expensive pretreatment steps, unreasonable economy and the like

Inactive Publication Date: 2010-05-19
SUZANO CANADA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although biorefining with organic solvent systems appears to have great potential for large-scale fuel ethanol production, currently available processes and systems are not economically justifiable as they require costly pretreatment steps and currently produce only low-value by-products ( Pan et al., 2006, J.Agric.Food Chem.54:5806-5813; Berlin et al., 2007, Appl.Biochem.Biotechnol.136-140:267-280; Berlin et al., 2007.J.Chem.Technol Biotechnol. 82:767-774)

Method used

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  • Continuous counter-current organosolv processing of lignocellulosic feedstocks
  • Continuous counter-current organosolv processing of lignocellulosic feedstocks
  • Continuous counter-current organosolv processing of lignocellulosic feedstocks

Examples

Experimental program
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Effect test

example 1

[0059] A representative sample of British Columbia aspen (Pulus aspen) (~125 years old) whole logs was collected. After felling, the logs were unloaded, split, chipped and ground to a chip size of approximately (Parr is a registered trademark of Parr Instruments Inc., Moline, IL, USA) Poplar chips were pretreated in a reactor with organic solvents in hydroalcoholic (50% w / w ethanol) without the addition of external acids or bases. A replica 200 g (ODW) sample of poplar wood chips designated ASP1 was cooked at 195°C for 60 minutes. The black liquor:wood ratio was 5:1 by weight. After cooking, the reactor was cooled to room temperature. The solids and spent liquid are then isolated by distillation. The solid was washed vigorously with hot ethanol solution (70° C.), followed by a tap water wash step. The moisture content of the cleaned pulp is reduced to about 40% by means of a hydraulic press (optionally a screw press). Homogenize the washed wood pulp and store it in a refr...

example 2

[0068] A replica 200-g sample prepared in Example 1, designated as ASP2 sawdust, was used in this study. in 2-L The aspen sawdust was pretreated in the reactor with an organic solvent in hydroalcoholic (50% w / w ethanol) without adding an external acid or alkali. A replica 200 g (ODW) sample of poplar wood chips was boiled at 195°C for 90 minutes. The black liquor:wood ratio was 5:1 by weight. After cooking, the reactor was cooled to room temperature. The solids and liquids are then isolated by distillation. The solid was washed vigorously with hot ethanol solution (70° C.), followed by a tap water wash step. The moisture content of the cleaned pulp is reduced to about 40% by means of a hydraulic press (optionally a screw press). Homogenize the washed wood pulp and store it in a refrigerator at 4 °C. Virgin wood chips, washed and unwashed wood pulp were determined according to the modified Klason lignin method obtained from the Technical Association of the Wood Pulp and ...

example 3

[0076] A replica 200-g sample prepared in Example 1, designated as ASP3 sawdust, was used in this study. in 2-L The aspen sawdust was pretreated in the reactor with an organic solvent in hydroalcoholic (50% w / w ethanol) without adding an external acid or alkali. Replica samples of poplar wood chips were boiled at 195°C for 120 minutes. The black liquor:wood ratio was 5:1 by weight. After cooking, the reactor was cooled to room temperature. The solids and liquids are then isolated by distillation. The solid was washed vigorously with hot ethanol solution (70° C.), followed by a tap water wash step. The moisture content of the cleaned pulp is reduced to about 40% by means of a hydraulic press (optionally a screw press). Homogenize the washed wood pulp and store it in a refrigerator at 4 °C. The chemical composition (hexose, pentose, lignin content) of virgin wood chips, washed and unwashed wood pulp was determined according to the modified Klason lignin method obtained fr...

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Abstract

A modular process for organosolv fractionation of lignocellulosic feedstocks into component parts and further processing of said component parts into at least fuel-grade ethanol and four classes of lignin derivatives. The modular process comprises a first processing module configured for physico-chemically digesting lignocellulosic feedstocks with an organic solvent thereby producing a cellulosic solids fraction and a liquid fraction, a second processing module configured for producing at least a fuel-grade ethanol and a first class of novel lignin derivatives from the cellulosic solids fraction, a third processing module configured for separating a second class and a third class of lignin derivatives from the liquid fraction and further processing the liquid fraction to produce a distillate and a stillage, a fourth processing module configured for separating a fourth class of lignin derivatives from the stillage and further processing the stillage to produce a sugar syrup.

Description

technical field [0001] The present invention relates to the fractionation of lignocellulosic feedstocks into components. More particularly, the present invention relates to processes, systems and processes for the fractionation of lignocellulosic materials with recyclable organic solvents for continuous controllable and operable production and further processing of lignin, monosaccharides, oligosaccharides, polysaccharides and other products derived therefrom. Device Configuration. Background technique [0002] The industrial process of producing cellulose-rich wood pulp from harvested wood is well known and generally involves the physical breakdown of the wood into smaller fragments and particles followed by chemical breakdown at high temperature and pressure to melt the lignin and combine it with its constituent fibers Steps for the separation of prime biomass. After decomposition is complete, the solids, including cellulose wood pulp, are separated from the used decompo...

Claims

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Application Information

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IPC IPC(8): C08H5/04C08H19/00C08H5/02B01D3/14C02F3/28C07H19/00C12C11/00C12M1/00C12M1/42C12P19/14C12P5/00C12P7/08
CPCY02E50/16Y02E50/343Y02E50/30
Inventor 克里斯多·哈尔伯格唐纳德·奥康纳迈克尔·拉什顿爱德华·肯德尔·派伊戈登·杰纳斯泰德亚历克斯·伯林约翰·罗斯·麦克拉克伦
Owner SUZANO CANADA INC
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