Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of obtaining a product sugar stream from cellulosic biomass

A technology of cellulose and biomass, applied in the direction of biofuel, fermentation, etc., can solve the problems that the temperature required for separation is unrealistic, expensive, and cannot be effectively removed

Inactive Publication Date: 2007-08-22
IOJIN ENERGY LTD
View PDF20 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In practice, there are several factors that limit the effectiveness of ion exchange treatment to remove inhibitors
First, the multicomponent nature of these streams makes it impossible to effectively remove some species under any single set of conditions
Second, high ion loading requires very frequent regeneration of the resin and is expensive
Although the analysis indicated that the method is suitable for the determination and quantification of organic acids including sugar and acetic acids, the temperatures required for the separation would be impractical for industrial applications
Furthermore, such a low pH may lead to the generation of degradation products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of obtaining a product sugar stream from cellulosic biomass
  • Method of obtaining a product sugar stream from cellulosic biomass
  • Method of obtaining a product sugar stream from cellulosic biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] Embodiment 1: Separation of sodium sulfate, sodium acetate and glucose by ion exclusion

[0148] This example illustrates the effectiveness of ion exclusion as a method of removing sodium acetate and sodium sulfate from glucose at pH 8

[0149] The fixed bed ion exclusion column was packed with Mitsubishi Chemical resin #UBK530. Before packing the column, 135 ml of resin was suspended in 1 liter of deionized water and allowed to settle. The supernatant was decanted, and this step was performed three times, which was sufficient to remove any visible particulates. After decanting the third supernatant, deionized water twice the volume of the resin was added to the resin, and the slurry was poured into a 127 ml column. The column includes a hot water jacket, but this jacket is not used during the resin filling step. The top of the column was sealed with a rubber stopper attached to the water pump. Handle with care to ensure airtight seal.

[0150] Rinse the packed co...

Embodiment 2

[0156] Example 2: Comparative Example - Separation of Glucose and Acetic Acid at pH 3

[0157] This example illustrates the separation of sugars from acetic acid and sodium bisulfate at pH 3 using ion exclusion. Acetic acid was poorly separated from glucose at pH 3 because the two components co-eluted (see Figure 2B). Excellent separation of acetic acid and sugars is provided using the methods described herein.

[0158] The fixed bed ion exclusion column was packed with Mitsubishi Chemical resin #UBK530. Before filling, suspend 135 ml of resin in 1 liter of deionized water and allow to settle. The supernatant was decanted, and this step was performed three times, which was sufficient to remove any visible particulates. After decanting the third supernatant, deionized water twice the volume of the resin was added to the resin, and the slurry was poured into a 122 ml column. The column includes a hot water jacket, but this jacket is not used during the resin filling step. ...

Embodiment 3

[0165] Embodiment 3: Elution of biomass sugar

[0166] A feedstock sample of biomass sugar was prepared by pretreating wheat straw with sulfuric acid under the conditions described in U.S. 4,461,648. The pH of the pretreatment was 1.4, and the pH of the resulting pretreated raw material was adjusted to 5 with sodium hydroxide. The neutralized cellulosic biomass is enzymatically hydrolyzed with cellulosicum produced by the Trichoderma fungus to produce a raw sugar stream. The raw sugar stream is separated from the insoluble residue, mainly lignin, by plate and frame filtration. The clarified sugar stream was evaporated to 44% of total solids and contained sodium and potassium sulfate salts, 300 g / L glucose, 44 g / L xylose, 5.3 g / L arabinose, 10.9 g / L sodium acetate at a concentration of 109 g / L (measured as acetic acid) and various trace metals. The clear sugar stream was evaporated, the pH adjusted to 8, then applied to the column and eluted as described in Example 1. The...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A process for obtaining a product sugar stream from cellulosic biomass is disclosed. In one process, the cellulosic biomass is pretreated at a pH between about 0.4 to 2.0 by adding one or more than one acid to produce a pretreated cellulosic biomass comprising acetic acid. One or more than one base is then added to the pretreated cellulosic biomass to adjust the pretreated cellulosic biomass to a pH of about 4.0 to about 6.0 to produce a neutralized cellulosic biomass comprising inorganic salt and acetate salt. The neutralized biomass is then hydrolyzed by cellulase enzymes to produce a crude sugar stream. Insoluble residue is separated from the crude sugar stream and the resulting clarified sugar stream is treated using ion exclusion chromatography at about pH 5.0 to about 10.0 to produce one or more raffinate streams and a product stream. The raffinate stream comprises inorganic salts and acetate salts, and the product stream comprises sugar. The product stream may then be fermented or otherwise further processed. In an alternate process, a product sugar stream is obtained from a crude sugar stream that is produced from conversion of cellulosic biomass to sugar. The cellulosic biomass may be produced using any suitable method. In this process the crude sugar stream is treated using ion exclusion chromatography at about pH 5.0 to about 10.0 to produce one or more than one raffinate stream comprising sulfate and acetate salts, and a product stream comprising sugar, and the product sugar stream is obtained.

Description

[0001] The present invention relates to methods of obtaining product sugar streams from cellulosic biomass, and more particularly, the present invention relates to methods of obtaining product sugar streams resulting from the enzymatic conversion of cellulosic biomass to sugars. Background of the invention [0002] Currently, fuel ethanol is produced from feedstocks such as corn starch, sugar cane and sugar beet. However, ethanol production from these sources cannot be expanded further due to limited farmland suitable for the production of these crops and competing interests in the human and animal food chain. Finally, the use of these feedstocks has a negative impact on the environment since the use of fossil fuels is associated with the release of carbon monoxide and other products during the conversion process. [0003] The possibility of producing ethanol from cellulose-containing feedstocks such as agricultural wastes, grasses, forestry wastes, and sugar processing residu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/00C12P7/10
CPCY02E50/16C12P7/56C12P19/14C12P19/02C12P7/10Y02E50/10
Inventor 布莱恩·弗蒂杰弗里·S.·托兰
Owner IOJIN ENERGY LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com