Waste Oil Solvent Preparation via Hydroisomerization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pyrolysis oil from waste plastic poses challenges due to high impurity content, particularly olefins, chlorine, sulfur, and nitrogen, making it difficult to convert into high-quality petrochemical solvents with specific physical property standards.
Innovation Solution
A method involving the separation and hydroisomerization of waste oil with a boiling point range of 180 to 340°C, using a solid acid material to remove impurities and a hydroisomerization catalyst to increase isoparaffin content, while reducing olefin and impurity levels, resulting in a solvent composition with enhanced branched paraffin content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If waste oil is directly used as solvent composition, then production cost is reduced, but impurity content is high and normal paraffin content is insufficient
Solution Approach 1:
The patent applies parameter changes by controlling reaction temperature (200-400°C), pressure (1-100 atm), and catalyst composition to transform waste oil into solvent composition with improved properties. The hydroisomerization process specifically changes the molecular structure to increase normal paraffin content while maintaining cost-effectiveness.
Solution Approach 2:
The patent uses catalysts as intermediaries to facilitate the transformation of waste oil. Specifically, hydroisomerization catalysts mediate the chemical reactions to convert waste oil into high-quality solvent composition with controlled impurity levels and enhanced paraffin content.
2Quantity of substance
If catalytic cracking technology is applied to waste oil, then olefins and aromatics are produced, but investment costs increase and hydrogen consumption increases
Solution Approach 1:
The patent extracts and removes impurities such as olefins, sulfur, nitrogen, and chlorine from waste oil through hydroisomerization and treatment processes. This selective removal achieves the desired product composition without requiring complex catalytic cracking infrastructure or high hydrogen consumption.
Solution Approach 2:
The patent converts the harmful impurities in waste oil (high olefin content, sulfur, nitrogen, chlorine) into beneficial outcomes by using them as feedstock for hydroisomerization. The process transforms these problematic components into valuable solvent composition, turning the waste oil's disadvantages into advantages.
3Manufacturing precision
If pyrolysis oil is converted to petrochemicals, then solvent production is achieved, but impurity content (olefins, chlorine, sulfur, nitrogen) prevents high-quality solvent production
Solution Approach 1:
The patent applies preliminary action by performing hydroisomerization and impurity removal treatments on waste oil before it can be used as solvent composition. This pre-treatment eliminates impurities and structures the oil to meet solvent specifications, preventing quality issues before they arise.
Solution Approach 2:
The patent replaces complex mechanical separation systems with chemical treatment processes. Instead of using multiple mechanical separation stages to remove impurities, the invention uses hydroisomerization chemistry to selectively transform and remove impurities, simplifying the overall process while achieving high solvent quality.
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 transforms waste oil into a high-quality solvent with increased branched paraffin and reduced impurity content, suitable for industrial use, improving environmental protection by converting hazardous gases into a usable solvent.
Implementation Method 1
reacting at least a part of a waste oil having a boiling point of 180 to 340° C. to remove impurities
Implementation Method 2
hydroisomerizing the waste oil from which the impurities have been removed, wherein the hydroisomerized waste oil includes 5 to 40 wt % of isoparaffins
Data Source
AI summary
Provided is a technology of converting an oil having a high content of Cl into a solvent. Impurities such as Cl, S, N, and metals are removed from an oil having a boiling point of 180 to 340° C. in a waste oil having a high content of Cl, and hydroisomerization is carried out, thereby applying an oil having a high isoparaffin ratio as a solvent. After a separation by boiling points according to the properties of the solvent product, a solid acid material and an oil having a high Cl content are mixed, impurities are removed by a heat treatment at a high temperature, and hydroisomerization is carried out by a noble metal/1-D zeolite catalyst, thereby, manufacturing a solvent product.