Poly-alpha-olefin Fractionation and Hydrogenation Process
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current poly-α-olefin production processes face challenges in achieving high-quality products with optimal equipment setups and minimal downtime, particularly in the separation and hydrogenation steps, which often require intermediate storage and batch-wise operations, leading to inefficiencies and product degradation.
Innovation Solution
A process involving the oligomerization of α-olefin monomers with catalysts, followed by fractionation into two PAO fractions (one with kinematic viscosity of 5 cSt or lower and another with higher viscosity), and subsequent separate hydrogenation of these fractions, allowing for continuous operation and minimizing intermediate storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the oligomerisation product is hydrogenated directly after the reaction section followed by separation, then the hydrogenation can be performed continuously, but intermediate storage capacities are required and batch-wise hydrogenation is needed
Solution Approach 1:
The patent segments the hydrogenation process by performing hydrogenation on different product fractions (lighter and heavier PAO fractions) separately and continuously, eliminating the need for batch-wise operation and intermediate storage capacities while maintaining continuous production capability
Solution Approach 2:
The patent performs fractionation of the oligomerisation product before hydrogenation, preparing the different PAO fractions in advance so that they can be hydrogenated continuously in separate streams without requiring intermediate storage of the entire product mixture
2Manufacturing precision
If the product is first separated to various product streams with desired properties and then subsequently hydrogenated, then the hydrogenation can be optimized for each fraction, but this requires intermediate storage capacities and campaign wise batch hydrogenation
Solution Approach 1:
The patent implements continuous hydrogenation of the separated PAO fractions in separate streams, eliminating batch-wise operations and campaign wise downtime, while maintaining the quality benefits of fraction-specific hydrogenation through continuous processing
Solution Approach 2:
The patent uses separate hydrogenation units for different PAO fractions, allowing each fraction to be hydrogenated continuously under optimized conditions without requiring batch operations, thus eliminating downtime while maintaining manufacturing precision
3Reliability
If heavier PAO fractions are hydrogenated, then the double bonds are saturated, but the viscosity increases and further fractionation may be required
Solution Approach 1:
The patent segments the PAO product into lighter and heavier fractions before hydrogenation, allowing the heavier fraction to be hydrogenated under conditions that manage viscosity increase, and providing an option for further fractionation if needed to maintain product properties
Solution Approach 2:
The patent manages viscosity changes during hydrogenation of heavier PAO fractions by controlling hydrogenation conditions and providing further fractionation capability, allowing the process to adapt to viscosity variations and maintain product specifications
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 approach enables the production of high-quality poly-α-olefins with optimized equipment usage, reduced downtime, and minimal product degradation, as the fractions are hydrogenated under conditions suited to their properties, enhancing yield and operational efficiency.
Implementation Method 1
Oligomerisation reaction of α-olefins to form various grades of components useful in production of synthetic lubricants are well known
Implementation Method 2
fractionating the obtained mixture of poly-α-olefins to two PAO fractions, wherein the two PAO fractions are a first fraction of PAO having a kinematic viscosity of 5 cSt or lower and a second fraction of PAO having a kinematic viscosity of more than 5 cSt
Implementation Method 3
subjecting the obtained two PAO fractions to separate hydrogenation to obtain hydrogenated PAO fractions
Data Source
AI summary
The present disclosure describes a process for producing poly-α-olefins. The process includes providing at least one α-olefin monomer and a catalyst, and letting the at least one α-olefin monomer react in the presence of the catalyst to form a mixture of poly-α-olefins (PAO). The obtained mixture of poly-α-olefins is fractionated to two PAO fractions wherein the two PAO fractions are a first fraction of PAO having a kinematic viscosity of 5 cSt or lower and a second fraction of PAO having a kinematic viscosity of more than 5 cSt. Optionally a recycle fraction is also obtained in the fractionation and at least a part of the recycle fraction including dimers of the α-olefins can be recycled back to the reaction step.