Method for producing pure sugar solution, and method for producing chemical product
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A manufacturing method and solution technology, applied in the production of sugar, chemical instruments and methods, sugar production, etc., can solve the problems of low removal efficiency, hindering the boiling point of substances, input large energy, etc., and achieve the effect of improving fermentation production efficiency
Inactive Publication Date: 2012-11-21
TORAY IND INC
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[0006] However, there is a problem that when cellulose-containing biomass is hydrolyzed, while the cellulose or hemicellulose components, etc. By-products such as furan compounds such as methylfurfural (HMF) or organic acids such as formic acid, acetic acid, and levulinic acid
However, this evaporative removal method depends on the boiling point of the fermentation inhibitor, and in particular, the removal efficiency of fermentation inhibitors such as organic acids with low boiling points is low, and there is a problem that a large amount of energy must be invested in order to obtain a sufficient removal efficiency.
[0009] In addition, there is also a method of removing fermentation inhibitors by ion exchange (Patent Document 7), but there is a problem in terms of cost
There is also a method of adsorption and removal using wood-based charcoal (i.e., activated carbon) and the like (Patent Document 8), but there is a problem that the removal target is limited to hydrophobic compounds
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[0144] Hereinafter, in order to demonstrate the manufacturing method of the refined sugar aqueous solution of this invention in more detail, an Example is given and demonstrated. However, the present invention is not limited to these examples.
reference example 1）
[0145] (Reference Example 1) Analysis method of monosaccharide concentration
[0146] The concentration of monosaccharides (glucose and xylose) contained in the obtained aqueous sugar solution was quantified by comparing it with a standard sample under the HPLC conditions shown below.
[0147] Column: Luna NH 2 (manufactured by Phenomenex Corporation)
[0150] Detection method: RI (differential refractive index)
[0151] Temperature: 30°C.
reference example 2）
[0152] (Reference example 2) Analytical method for the concentration of fermentation inhibitors
[0153] Quantification of furanic fermentation inhibitors (HMF, furfural) and phenolic fermentation inhibitors (vanillin, acetylvanillin) contained in sugar aqueous solution by comparing with standard samples under the HPLC conditions shown below .
[0154] Column: Synergi HidroRP 4.6mm×250mm (manufactured by Phenomenex)
[0155] Mobile phase: acetonitrile-0.1%H 3 PO 4 (flow rate 1.0mL / min)
[0156] Detection method: UV (283nm)
[0157] Temperature: 40°C.
[0158] Organic acid fermentation inhibitors (acetic acid, formic acid) contained in the sugar aqueous solution were quantified by comparing with standard samples under the HPLC conditions shown below.
[0159] Column: Shim-Pack SPR-H and Shim-Pack SCR101H (manufactured by Shimadzu Corporation) in series
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Abstract
Provided is a method for removing, during a step for producing a sugar solution, a fermentation inhibiting substance, which is generated during a step for producing sugar from a cellulose-containing biomass. Also provided is a method for steadily generating a pure sugar solution, which has an extremely low content of a fermentation inhibiting substance, over a long period of time. Specifically, disclosed is a method for producing a pure sugar solution, which uses a cellulose-containing biomass as the starting material and which involves: a step (1) for producing a sugar solution by subjecting a cellulose-containing biomass to decomposition treatment; a step (2) for subjecting the sugar solution obtained in step (1) to coagulation treatment; a step (3) for filtering the sugar solution obtained in step (2) by means of a microfiltration membrane and / or an ultra-filtration membrane, and for collecting the sugar solution from the permeate side; and a step (4) for filtering the sugar solution obtained in step (3) by means of a nano-filtration membrane and / or a reverse osmosis membrane, for collecting the pure sugar solution from the non-permeate side, and for removing a fermentation inhibiting substance from the permeate side.
Description
technical field [0001] The present invention relates to a process for the production of aqueous refined sugar solutions from cellulose-containing biomass. Background technique [0002] The 20th century of mass consumption and mass waste has come to an end. In the 21st century, which seeks to build an environment-friendly society, the depletion of fossil resources and the deepening of global warming are expected to promote biomass resources as a recycling resource. effective use. [0003] At present, countries such as the United States and Brazil are actively using sugarcane and corn as raw materials to produce bioethanol from biomass resources. This is because sugar cane and corn are rich in sucrose and starch, and it is easy to prepare and ferment an aqueous sugar solution from them. However, since sugarcane and corn are foods themselves, when they are used as raw materials, there is a serious problem that they will compete with food or feed, and the price of raw material...
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