Bio-Lubricant Composition via Hydrolysis and Cyclic Coupling
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Solution Overview
Problem
Current methods for producing lubricants from vegetable oils suffer from poor low-temperature characteristics, low oxidation stability, low viscosity index, and poor solubility of additives, making them unsuitable for industrial use.
Innovation Solution
A four-step process involving hydrolysis, dehydration/ketonization, Friedel-Crafts acylation/alkylation, and hydrotreatment is used to convert waste cooking oils and cyclic oxygenated hydrocarbons into biolubricants with desirable properties, including long hydrocarbon chains, low unsaturation, minimal branching, and inclusion of naphthenic rings and polar molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional transesterification processes are used to produce lubricants from vegetable oils, then the production process is simple and cost-effective, but the resulting lubricants suffer from poor low-temperature characteristics, low oxidation stability, low viscosity index, and poor additive solubility
Solution Approach 1:
The patent applies parameter changes by conducting the reaction at supercritical conditions (temperature above critical point and pressure above critical point) to transform the reaction mechanism from traditional transesterification to a pathway that produces hydrocarbon chains with superior oxidation stability while maintaining process feasibility
Solution Approach 2:
The patent produces composite lubricant molecules that combine hydrocarbon chains with naphthenic rings and cyclic structures, creating a composite molecular structure that simultaneously achieves low-temperature fluidity, high oxidation stability, and good additive solubility
2Ease of manufacture
If traditional esterification methods are used to modify vegetable oils for lubricant production, then the process is straightforward, but the final products exhibit poor low-temperature characteristics and low viscosity index
Solution Approach 1:
The patent uses supercritical reaction conditions with specific temperature and pressure parameters to enable complete dehydration and ketonization, producing hydrocarbon chains with minimal oxygen content that exhibit excellent low-temperature fluidity and high viscosity index
Solution Approach 2:
The patent introduces local quality by incorporating naphthenic rings and cyclic structures at specific positions within the hydrocarbon chains, creating localized regions that enhance low-temperature performance while maintaining overall molecular stability
3Reliability
If chemical modifications of triglycerides and free fatty acids are performed using current methods, then some lubricant properties are restored, but the products still suffer from low oxidation stability, low viscosity index, and poor additive solubility
Solution Approach 1:
The patent segments the modification process into distinct sequential steps: hydrolysis of triglycerides to free fatty acids, dehydration to form hydrocarbon chains, ketonization to introduce carbonyl groups, and Friedel-Crafts acylation to attach aromatic rings. This segmentation allows each step to be optimized independently, achieving superior oxidation stability and additive solubility while managing process complexity
Solution Approach 2:
The patent uses supercritical carbon dioxide as an intermediary medium that facilitates the chemical reactions while providing a controlled environment that enhances oxidation stability and improves the solubility of additives in the final lubricant product
4Ease of operation
If vegetable oils are used directly as lubricants, then they possess good lubricity and low pour point, but they have poor oxidative tolerance and poor solubility of additives
Solution Approach 1:
The patent converts the harmful unsaturated bonds in vegetable oils that cause oxidation into beneficial saturated hydrocarbon chains through supercritical dehydration and hydrogenation, eliminating oxidative vulnerability while preserving the low pour point and good lubricity characteristics of the original vegetable oils
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 biolubricants with improved low-temperature characteristics, oxidation stability, and additive solubility, addressing the limitations of existing technologies.
Implementation Method 1
i. hydrolyzing a starting material to provide a hydrolyzed product mixture
Implementation Method 2
reacting the hydrolyzed product mixture under conditions capable of producing a condensation product mixture
Implementation Method 3
contacting the condensation product mixture with a cyclic compound to provide a coupled product mixture
Implementation Method 4
iv. hydrogenating the coupled product mixture to provide the lubricant composition
Data Source
Figure 1~2D
Figure 3~4
Figure 5~6
AI summary
The present disclosure provides a method of producing a lubricant composition comprising the steps of hydrolyzing a starting material to provide a hydrolyzed product mixture, reacting the hydrolyzed product mixture under conditions capable of producing a condensation product mixture, contacting the condensation product mixture with a cyclic compound to provide a coupled product mixture, and hydrogenating the coupled product mixture to provide the lubricant composition. In addition, other methods and compositions thereof are also provided.