High Purity Dielectric Vegetable Oil via Modified RBD Process
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Solution Overview
Problem
Current dielectric fluids used in the electrical industry, such as mineral oils and synthetic hydrocarbon oils, are not biodegradable and pose ecological concerns, while vegetable oils lack stability due to oxidation, leading to degraded properties and increased electrical conductivity, necessitating the development of high purity dielectric vegetable oils without antioxidants or external additives.
Innovation Solution
A modified RBD (Refined, Bleached, and Deodorized) process, specifically the Long-Mix Modified Caustic Refinement process, is employed, which includes degumming, neutralization, bleaching, and deodorization stages, with additional steps to remove impurities and adjust distillation temperatures, resulting in a high purity dielectric vegetable oil with optimized fatty acid composition and improved oxidation stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vegetable oils are used as dielectric fluids, then biodegradability is improved, but oxidation stability deteriorates
Solution Approach 1:
The patent applies extraction by removing unstable components from vegetable oils through a refined purification process. The process extracts and eliminates free fatty acids, phospholipids, cholesterol, and other polar compounds that are prone to oxidation, thereby maintaining the biodegradable nature of vegetable oils while improving their oxidation stability for dielectric applications
Solution Approach 2:
The patent changes the chemical composition parameters of vegetable oils by controlling the purification process to achieve specific quality thresholds. The oil is processed to contain less than 0.05% free fatty acids, less than 0.01% phospholipids, and less than 0.005% cholesterol, transforming it from a typical vegetable oil into a stable dielectric fluid suitable for electrical equipment
2Reliability
If vegetable oils undergo oxidation, then electrical conductivity increases, but dielectric properties deteriorate
Solution Approach 1:
The patent applies preliminary anti-action by preventing oxidation before it occurs through extensive purification. The process removes pro-oxidant components and stabilizes the oil composition in advance, creating a dielectric fluid that resists oxidation and maintains low electrical conductivity throughout its service life in electrical equipment
Solution Approach 2:
The patent converts the naturally high purity state required for human consumption into a benefit for dielectric applications. The same purification steps that remove unwanted compounds for food safety also eliminate oxidation-prone substances, inadvertently creating an ideal dielectric fluid with excellent electrical insulation properties
3Reliability
If antioxidants and external additives are added to vegetable oils, then oxidation stability is improved, but biodegradability deteriorates
Solution Approach 1:
The patent applies self-service by allowing the vegetable oil to stabilize itself through natural purification rather than requiring external antioxidants. The refined process removes unstable components and creates a inherently stable oil that maintains its biodegradability while achieving sufficient oxidation resistance for dielectric applications without synthetic additives
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 produces a high purity dielectric vegetable oil with enhanced stability and biodegradability, suitable for use in electric apparatuses, maintaining excellent dielectric properties and minimizing environmental impact by avoiding synthetic additives, thus meeting ecological regulations.
Implementation Method 1
The process of the present invention includes the stages of: degumming, neutralization, bleaching and deodorization
Implementation Method 2
The process of the present invention includes the stages of: degumming, neutralization, bleaching and deodorization
Implementation Method 3
The process of the present invention includes the stages of: degumming, neutralization, bleaching and deodorization
Implementation Method 4
The process of the present invention includes the stages of: degumming, neutralization, bleaching and deodorization
Implementation Method 5
adjusting the distillation temperature by stripping steam in the deodorization step
Data Source
AI summary
A dielectric high purity vegetable oil—free from antioxidants and/or external additives to be used in electric equipment such as transformers, as isolating element and as cooling means and a method for obtaining the same in which the dielectric high purity vegetable oil—is obtained by means of the optimization of the bleaching steps—and deodorizing—from the Refining process—known as Modified Caustic Refining Long-Mix (RBD).