Cellulose Decrystallization via Alkali Co-Solvent Treatment
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Solution Overview
Problem
The efficient conversion of cellulose from cellulosic materials into sugars is hindered by its crystalline structure, requiring high enzyme doses and harsh conditions, which increases costs and complicates the production of biofuels and cellulose derivatives.
Innovation Solution
Treating cellulosic feedstocks with an alkali in a co-solvent system, such as water and ethanol, to decrystallize cellulose, making it more accessible for enzymatic or chemical modification under mild conditions, and stabilizing the decrystallized cellulose in an aqueous medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cellulose is treated with harsh chemical conditions and high temperature to increase accessibility, then the accessibility of cellulose to enzymes is improved, but the production cost increases and the process complexity increases
Solution Approach 1:
The patent changes the chemical parameters of the treatment system by using ionic liquids instead of traditional harsh chemicals. The ionic liquids provide effective cellulose dissolution and accessibility enhancement at milder conditions, thereby reducing production costs while maintaining or improving enzyme accessibility to cellulose.
Solution Approach 2:
The patent introduces ionic liquids as an intermediary substance that mediates between the cellulose and enzymes. The ionic liquids facilitate cellulose dissolution and create a more accessible state for enzymatic action, replacing the need for harsh chemical conditions and high temperature treatments.
2Productivity
If high doses of enzymes are used to convert crystalline cellulose to sugars, then the conversion efficiency is improved, but the production cost increases
Solution Approach 1:
The patent applies preliminary action by treating cellulose with ionic liquids before enzymatic conversion. This pre-treatment dissolves the crystalline structure and enhances accessibility, allowing enzymes to work more efficiently and reducing the total enzyme dosage required for complete conversion to sugars.
Solution Approach 2:
The patent changes the physical state parameters of cellulose through ionic liquid treatment, transforming it from a crystalline, inaccessible state to a dissolved, accessible state. This parameter change enables enzymes to act more effectively on the cellulose, improving conversion efficiency while reducing enzyme requirements.
3Ease of operation
If traditional pretreatment methods are used to disrupt fiber structure, then the accessibility of feedstock is improved, but the process complexity and harsh conditions increase
Solution Approach 1:
The patent replaces mechanical and harsh chemical pretreatment systems with a chemical solution based on ionic liquids. Instead of using mechanical disruption methods or harsh chemical reagents, the ionic liquids directly dissolve and disrupt the fiber structure, simplifying the overall process while maintaining or improving feedstock accessibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This process enhances the accessibility and efficiency of cellulose conversion, reducing the need for high enzyme quantities and improving the uniformity of cellulose derivatives, thereby lowering production costs and enhancing the quality of biofuels and cellulose-based products.
Implementation Method 1
treating cellulosic feedstocks with an alkali in a co-solvent system, such as water and ethanol, to decrystallize cellulose
Implementation Method 2
treating cellulosic feedstocks with an alkali in a co-solvent system, such as water and ethanol, to decrystallize cellulose
Data Source
AI summary
Disclosed are methods and systems for treating cellulose to make it more accessible for enzymatic or chemical modification. The invention includes treating cellulose with an alkali in an alcohol/water co-solvent system. The treatment decrystallizes or deaggregates the cellulosic material. The methods and systems increase the efficiency of enzymatic or chemical modifications of cellulose for use as biofuels or cellulose derivatives.