Biolubricant Production via Epoxidation and Ring-Opening
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Solution Overview
Problem
Biolubricants derived from vegetable oils face limitations in thermal and oxidative stability due to unsaturation, and existing production processes often use expensive catalysts with handling risks.
Innovation Solution
A process involving esterification of hydrolyzed vegetable oil with a branched aliphatic alcohol, followed by epoxidation and nucleophilic substitution using a branched aliphatic alcohol, employing low-cost, commercially available catalysts like Amberlyst-15 and p-Toluenesulfonic acid, to produce biolubricants with improved stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vegetable oils are used as raw material for biolubricants, then biodegradability and lubrication efficiency are improved, but thermal and oxidative stability deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of vegetable oil esters through epoxidation (adding oxygen functional groups) and subsequent ring-opening reactions. These chemical transformations alter the molecular parameters to reduce unsaturation and improve oxidative stability while maintaining biodegradability from the original vegetable oil source.
2Stability of the object's composition
If chemical modifications are applied to improve oxidative stability, then thermal and oxidative stability is improved, but fluidity temperature increases
Solution Approach 1:
The patent uses parameter changes by carefully selecting the type of alcohol for ring-opening reaction and controlling reaction conditions to achieve the right balance between oxidative stability and fluidity temperature. The chemical structure is modified to add stability while maintaining appropriate low-temperature flow properties.
3Productivity
If expensive catalysts are used in production, then reaction efficiency is improved, but handling safety and cost deteriorate
Solution Approach 1:
The patent applies this principle by replacing expensive, hazardous catalysts with cheaper, safer alternative catalysts that can be used effectively for the epoxidation and ring-opening reactions. The focus is on using readily available, low-cost catalysts that eliminate handling risks while maintaining acceptable reaction efficiency.
Solution Approach 2:
The patent uses intermediary substances such as formic acid and hydrogen peroxide in the epoxidation process, and various alcohols in the ring-opening process. These intermediaries enable the reactions to proceed with safer catalysts, mediating between the reactants and reducing the need for hazardous catalytic materials.
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 yields biolubricants with desirable physical and chemical properties, including low fluidity temperature, high viscosity, and enhanced oxidative stability, while using safer and more cost-effective catalysts, expanding their application range.
Implementation Method 1
esterifying the product from vegetable oil hydrolysis using a branched aliphatic alcohol
Implementation Method 2
epoxidation of the esters in step (a)
Implementation Method 3
nucleophilic substitution of the epoxidated esters obtained in step (b) using a branched aliphatic alcohol
Data Source
Figure 1
AI summary
The present invention describes a process for obtaining a biolubricant from vegetable oil, which comprises the steps of (a) esterification reaction of the product of vegetable oil hydrolysis using a branched aliphatic alcohol; (b) epoxidation reaction of the esters obtained in step (a); and (c) nucleophilic substitution reaction of the epoxidated esters obtained in step (b) using a branched aliphatic alcohol. The present invention also describes a biolubricant obtained from the process. More specifically, a biolubricant is described that is produced from a ricinoleic fatty acid, whose formula is illustrated in Figure 1 of the present invention, and where R1 is a hydroxyl or it is from the formula R3COO-, with R3 being an alkyl radical C1-C3, preferably a methyl radical; and R2 consists of a straight chain of hydrocarbons C4-C8 and a branched chain of hydrocarbons C1-C3.