Liquid-Phase Monothiocarbonate Oxidation for Selective Odor Reduction
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Solution Overview
Problem
Organic sulfur compounds, particularly cyclic monothiocarbonates, often possess an unpleasant odor due to undesired volatile by-products containing sulfur, which are difficult to remove through standard purification methods.
Innovation Solution
Contacting monothiocarbonate compounds in a liquid phase with specific oxidants, such as hydrogen peroxide or nitric acid, at controlled temperatures and concentrations to selectively oxidize the by-products without significantly affecting the monothiocarbonates themselves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If standard purification methods are used to remove volatile sulfur by-products, then the monothiocarbonate compounds can be obtained, but the unpleasant odor caused by sulfur-containing by-products remains difficult to eliminate
Solution Approach 1:
The patent applies strong oxidants such as hydrogen peroxide, ozone, or peracetic acid to oxidize sulfur-containing by-products (mercaptans, sulfides) into less odorous compounds such as disulfides, sulfones, or sulfoxides. This oxidation process selectively targets the harmful sulfur compounds without significantly affecting the monothiocarbonate product, thereby eliminating the unpleasant odor while maintaining product integrity.
Solution Approach 2:
The invention converts the harmful sulfur-containing by-products that cause odor into beneficial or neutral compounds through oxidation. The mercaptans and sulfides that generate unpleasant smells are transformed into disulfides, sulfones, or sulfoxides which have significantly reduced or eliminated odor, thus turning a harmful characteristic into a beneficial purification outcome.
2Object-generated harmful factors
If oxidation is applied to remove sulfur by-products, then the odor is reduced, but there is a risk of oxidizing the monothiocarbonate compounds themselves
Solution Approach 1:
The oxidation process exhibits local quality by selectively acting on sulfur-containing by-products while leaving the monothiocarbonate compounds largely unaffected. The oxidants specifically target the sulfur atoms in mercaptans and sulfides due to their higher reactivity toward oxidation, while the monothiocarbonate groups remain relatively stable under the controlled oxidation conditions, thus achieving selective purification.
Solution Approach 2:
The patent utilizes parameter changes by carefully controlling oxidation conditions including oxidant concentration, temperature, and contact time to achieve selective oxidation. By adjusting these parameters, the process optimizes the oxidation of sulfur by-products while minimizing the oxidation of monothiocarbonate compounds, thereby maintaining product stability while achieving odor reduction.
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
The process effectively reduces the odor of monothiocarbonates by minimizing the presence of volatile sulfur by-products, resulting in a significant decrease in odor without altering the monothiocarbonate compounds.
Implementation Method 1
the organic sulfur compounds in a liquid phase are brought into contact with an oxidant
Data Source
AI summary
A process reduces the odor of compounds with al least one five-membered cyclic monothiocarbonate group, referred to as monothiocarbonate compounds. The monothiocarbonate compounds are in are liquid phase and are brought into contact with an oxidant.