Titanium Silicalite Catalytic Oxidation of 2,5-Furan Dimethanol
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Solution Overview
Problem
Current methods for synthesizing 6-hydroxy-6(hydroxymethyl)-2H-pyran-3(6H)-one face challenges such as low yield, environmental impact, and economic inefficiencies due to the use of homogeneous catalysts, organic solvents, and byproduct contamination, particularly in solvent-free conditions.
Innovation Solution
A method involving the catalytic oxidation of 2,5-furan dimethanol using titanium silicalite as a heterogeneous catalyst and hydrogen peroxide as an oxidant in water, under mild conditions, to achieve a one-step efficient synthesis of 6-hydroxy-6(hydroxymethyl)-2H-pyran-3(6H)-one.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If homogeneous catalysts are used for catalytic oxidation, then the reaction efficiency is improved, but the separation difficulty increases and product purity decreases
Solution Approach 1:
The patent employs titanium silicalite, a porous heterogeneous catalyst with specific pore structure, to perform catalytic oxidation. The porous structure provides high surface area for catalysis while allowing easy separation from the reaction mixture through filtration, resolving the contradiction between reaction efficiency and separation difficulty.
Solution Approach 2:
The patent uses composite titanium silicalite material combining titanium oxide and silica in a specific porous structure. This composite heterogeneous catalyst achieves high catalytic activity comparable to homogeneous catalysts while enabling easy separation, thus improving both productivity and ease of manufacture.
2Productivity
If organic solvents are used in the reaction system, then the reaction efficiency is improved, but the environmental friendliness deteriorates
Solution Approach 1:
The patent employs water as the reaction medium instead of organic solvents. Water is environmentally friendly, inexpensive, and easily separable, achieving both high reaction efficiency through the catalytic system and environmental friendliness, thus resolving the contradiction between productivity and environmental impact.
3Productivity
If conventional oxidants like NBS or m-CPBA are used, then the oxidation efficiency is improved, but the byproduct contamination increases
Solution Approach 1:
The patent uses hydrogen peroxide as an intermediary oxidant in the catalytic oxidation system. Hydrogen peroxide decomposes to water and oxygen, avoiding the formation of harmful byproducts like succinimide or m-chlorobenzoic acid. The titanium silicalite catalyst mediates this oxidation process efficiently, resolving the contradiction between oxidation efficiency and byproduct contamination.
4Object-affected harmful factors
If solvent-free conditions are used, then the environmental friendliness is improved, but the yield decreases
Solution Approach 1:
The patent employs porous titanium silicalite catalyst in a water-based system. The porous structure enables efficient catalysis in aqueous medium, achieving high yield (95.2%) while maintaining environmental friendliness. The water-soluble catalyst can be easily separated, resolving the contradiction between environmental friendliness and yield.
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 approach results in a high yield of 95.2%, reduces byproducts, and enhances environmental friendliness, with the catalyst being reusable and the process economically viable, offering improved atom economy and green index.
Implementation Method 1
catalytically oxidizing 2,5-furan dimethanol for 20 min-120 min at 15°C-100°C by using titanium silicalite as a catalyst
Implementation Method 2
catalytic oxidation of 2,5-furan dimethanol using titanium silicalite as a heterogeneous catalyst and hydrogen peroxide as an oxidant
Data Source
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AI summary
The present application discloses a method for preparing 6-hydroxy-6(hydroxymethyl)-2H-pyran-3(6H)-one through catalytic oxidization. The method comprises: catalytically oxidizing 2,5-furan dimethanol for 20 min-120 min at 15°C-100°C by using titanium silicalite as a catalyst, hydrogen peroxide as an oxidant and water as a reaction medium, so as to obtain 6-hydroxy-6(hydroxymethyl)-2H-pyran-3(6H)-one. In the present application, 6-hydroxy-6(hydroxymethyl)-2H-pyran-3(6H)-one is prepared under mild conditions through one-step catalytic oxidization, thereby realizing a more clean and economic catalytic process. The method of the present application has a yield as high as 95.2%, low cost, less side products, environmental friendliness, relatively high atom economy and reaction efficiency, easy product separation and good industrial application prospects.