Hydrorefining Clarified Oil for High Aromatic Base Oil
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Solution Overview
Problem
The existing methods for producing highly aromatic base oils for rubber processing and asphalt reclamation face limitations in production volume and compliance with regulations regarding carcinogenic polycyclic aromatic compounds, necessitating a novel and efficient method to achieve high aromatic content while reducing harmful compounds.
Innovation Solution
A method involving hydrorefining clarified oil to achieve an aromatic content of 50% or more, followed by mixing with other base oils to meet specific viscosity and purity standards, and optionally using fractionation or adsorption treatments to reduce specific aromatic compounds below regulatory limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If extract is produced by lubricant oil production equipment to obtain highly aromatic base oil, then aromatic content and rubber compounding performance are improved, but production volume is limited
Solution Approach 1:
The invention changes the production method from extract production via lubricant oil equipment to hydrorefining of clarified oil from fluid catalytic cracking. This parameter change in the production process enables significantly increased production volume while maintaining high aromatic content (50% or more by mass) through controlled hydrorefining conditions
Solution Approach 2:
The invention extracts clarified oil from fluid catalytic cracking slurry oil by removing catalyst particles, then applies hydrorefining to transform this clarified oil into highly aromatic base oil. This extraction and transformation process replaces the limited extract production method with a scalable hydrorefining process
2Quantity of substance
If hydrorefining conditions are intensified to increase aromatic content, then rubber compounding performance is improved, but production cost and energy consumption increase
Solution Approach 1:
The invention optimizes hydrorefining parameters including temperature (300-400°C), pressure (5-20 MPa), hydrogen-to-oil ratio (300-750 NL/L), and space velocity (0.3-2.0 h⁻¹) to achieve high aromatic content (50% or more) while controlling energy consumption. These parameter settings balance reaction efficiency with energy efficiency
Solution Approach 2:
The invention uses commercially available hydrorefining catalysts and standard hydrorefining process conditions that are already optimized in the industry, copying proven energy-efficient parameters rather than developing new high-energy processes
3Quantity of substance
If conventional methods are used to produce highly aromatic base oil, then rubber compounding performance is improved, but compliance with carcinogenic compound regulations is compromised
Solution Approach 1:
The invention uses hydrorefining, a process traditionally used to remove aromatics, in reverse - by controlling conditions to preserve and concentrate aromatic content while simultaneously removing harmful polycyclic aromatic compounds. The hydrorefining process converts the potential harm of high aromatic content into benefit by selectively removing carcinogenic compounds
Solution Approach 2:
The invention adjusts hydrorefining parameters (temperature, pressure, catalyst type, residence time) to achieve selective removal of carcinogenic polycyclic aromatic compounds while maintaining high aromatic content (50% or more). This parameter optimization enables compliance with regulations while preserving desirable aromatic properties
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 enables the production of highly aromatic base oils that excel in workability, extensibility, and economic performance, while ensuring compliance with regulatory standards for rubber compounding and asphalt reclamation, with reduced levels of carcinogenic compounds.
Implementation Method 1
a method involving hydrorefining clarified oil to achieve an aromatic content of 50% or more
Implementation Method 2
a step of hydrorefining a clarified oil to obtain a highly aromatic base oil
Implementation Method 3
optionally using fractionation or adsorption treatments to reduce specific aromatic compounds below regulatory limits
Data Source
AI summary
A method for producing a highly aromatic base oil of the present invention includes a step of hydrorefining a clarified oil to obtain a highly aromatic base oil having an aromatic content of 50% by mass or more determined by a column chromatography analysis method. The step of hydrorefining a clarified oil is preferably performed under conditions of a hydrogen pressure of 5.0 to 20.0 MPa, a temperature of 280 to 400° C., a hydrogen oil ratio of 300 to 750 NL/L, and a space velocity of 0.3 to 2.0 h−1. According to the present invention, a highly aromatic base oil used for rubber processing, asphalt reclamation and the like, and a novel method for producing a highly aromatic base oil can be provided.