Polyol Ester Brightening via Peroxide Oxidation and Steam Stripping
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Solution Overview
Problem
The production of polyol esters, particularly those used as lubricants and plasticizers, faces challenges in achieving optimal color properties and stability due to issues with catalysts, adsorbents, and the use of hazardous chemicals like ethylene oxide, which requires extensive safety measures and results in unwanted by-products and contamination.
Innovation Solution
A process involving the treatment of polyol esters with peroxidic compounds, followed by steam treatment and drying, without the use of adsorbents, to achieve light-colored products with low peroxide numbers and improved color stability, using hydrogen peroxide or other peroxidic compounds at specific concentrations and temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If polyol esters are produced using conventional esterification processes with catalysts, then production efficiency is improved, but color properties deteriorate and stability is reduced
Solution Approach 1:
The patent removes harmful catalysts and adsorbents from the production process entirely. By using a catalyst-free esterification process followed by peroxidic treatment, the method extracts the problematic elements that cause color degradation while maintaining production efficiency.
Solution Approach 2:
The patent employs peroxidic compounds as strong oxidizing agents to treat the polyol esters. This oxidation process effectively removes color contaminants and improves color stability without requiring catalysts or adsorbents, thus resolving the contradiction between productivity and color quality.
2Adaptability or versatility
If ethylene oxide is used for ethoxylation to produce G-esters, then versatility of production methods is improved, but safety requirements and complexity increase significantly
Solution Approach 1:
The patent extracts ethylene oxide from the production process entirely, replacing it with safer alternative methods. By eliminating this hazardous substance, the method maintains production versatility while dramatically reducing safety requirements and equipment complexity.
Solution Approach 2:
The patent employs simpler, safer reagents and processes that can be easily handled and disposed of without extensive safety infrastructure. This approach replaces the need for complex safety systems required by ethylene oxide while maintaining production flexibility.
3Stability of the object's composition
If adsorbents are used to improve color properties of polyol esters, then color stability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent removes adsorbents from the process and replaces them with peroxidic treatment. This extraction of the complex step simplifies manufacturing while effectively improving color stability through oxidation of color contaminants.
Solution Approach 2:
The patent replaces the mechanical/physical process of adsorption with a chemical oxidation process. This substitution using peroxidic compounds achieves color stabilization through chemical transformation rather than physical adsorption, reducing manufacturing complexity.
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 method produces polyol esters with excellent color properties and stability, eliminating the need for adsorbents and reducing peroxide levels, which remain stable over time and meet ecological and safety requirements.
Implementation Method 1
treating the polyol ester with peroxidic compounds
Implementation Method 2
followed by steam treatment and drying
Implementation Method 3
steam treatment
Data Source
AI summary
The present invention relates to a process for lightening the color of polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms, wherein the work-up of the reaction product is carried out without the use of adsorbents and comprises treatment with peroxide compounds and an immediately subsequent steam treatment with subsequent drying.