Formic Acid Extraction Using Linear Primary Alcohols
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Solution Overview
Problem
Current methods for separating formic acid from a reaction mixture containing a polyoxometalate ion are complex and often inactivate the catalyst, requiring multiple distillation steps and specific solvents that can oxidize primary alcohols, making efficient extraction challenging.
Innovation Solution
A method using linear primary alcohols with 5 to 12 carbon atoms in a protic solvent to extract formic acid from a reaction mixture, allowing for selective separation of formic acid under favorable reaction conditions without inactivating the catalyst, and enabling in-situ extraction during formic acid production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ether or amide is used for extraction, then formic acid can be separated, but the process becomes complex requiring multiple distillation steps
Solution Approach 1:
The patent extracts formic acid from the reaction mixture using a linear primary alcohol, separating it from the polyoxometalate catalyst and other components in a single extraction step, eliminating the need for complex multi-step distillation processes
Solution Approach 2:
The patent changes the extraction parameter by using linear primary alcohols with 5 to 12 carbon atoms, which have optimal solubility characteristics for formic acid, achieving efficient separation without requiring complex process equipment
2Manufacturing precision
If conventional extraction solvents are used, then formic acid can be extracted, but the catalyst is inactivated
Solution Approach 1:
The linear primary alcohol acts as an intermediary extractant that selectively dissolves formic acid without interacting with or deactivating the polyoxometalate catalyst, allowing simultaneous preservation of catalyst activity and efficient acid extraction
Solution Approach 2:
The patent changes the chemical parameter of the extraction solvent to linear primary alcohols with 5 to 12 carbon atoms, which have the specific property of being unable to oxidize primary alcohols under reaction conditions, thus preserving catalyst activity while maintaining extraction efficiency
3Manufacturing precision
If oxidation conditions are applied to extract formic acid, then separation can be achieved, but primary alcohols are cleaved
Solution Approach 1:
The patent changes the chemical stability parameter by selecting linear primary alcohols with 5 to 12 carbon atoms as extractants, which resist oxidation and C-C bond cleavage under the reaction conditions, preventing substance loss while achieving formic acid separation
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 effectively separates formic acid while preserving the catalyst's activity, achieving high selectivity and efficiency in formic acid extraction, as demonstrated by the use of 1-hexanol and 1-heptanol, which show high distribution coefficients and selectivity for formic acid, even during the oxidation of organic substances.
Implementation Method 1
A method using linear primary alcohols with 5 to 12 carbon atoms in a protic solvent to extract formic acid from a reaction mixture
Implementation Method 2
The polyoxometalate ion mentioned serves as a catalyst
Implementation Method 3
an oxidative cleavage of C-C bonds of primary alcohols and vicinal diols
Data Source
AI summary
The invention relates to a method for separating formic acid from a reaction mixture which comprises, in addition to formic acid, a polyoxometalate ion of general formula [PMoxVyO40]n-, where 6 ≤ x ≤ 11, 1 ≤ y ≤ 6, x + y = 12 and 3 < n < 10, where n, x and y are each integers, wherein the separation occurs by means of an extraction using a linear primary alcohol, wherein the carbon chain of the alcohol comprises 5 to 12 carbon atoms, and the reaction mixture is present in a protic solvent.