Hydroisomerisation Additive Strategy With SSZ-91 for Higher Base Oil Yield
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Solution Overview
Problem
There is an ongoing need to develop new and improved hydroisomerisation processes to enhance the yield of base oil production from hydrocarbon feeds.
Innovation Solution
The addition of a nitrogen heterocycle as a hydroisomerisation additive to a hydrocarbon feed, combined with a hydroisomerisation catalyst comprising zeolite SSZ-91, improves the yield of base oil by at least 1.0 wt. % compared to processes without the additive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydroisomerisation processes are used without additives, then the process is simple and easy to operate, but the base oil yield is limited
Solution Approach 1:
A nitrogen heterocycle compound is introduced as an intermediary substance to facilitate the hydroisomerisation reaction. The additive interacts with the catalyst and reactants to enhance the conversion efficiency and base oil yield without requiring fundamental changes to the process equipment or operating conditions.
Solution Approach 2:
The invention changes the chemical composition parameter of the reaction system by introducing nitrogen heterocycle compounds with specific molecular structures and properties. This parameter change modifies the reaction kinetics and catalyst performance, leading to improved base oil yield while maintaining process simplicity.
2Manufacturing precision
If standard hydroisomerisation catalysts are used, then the catalyst structure is simple and cost-effective, but the iso-paraffin to n-paraffin ratio improvement is limited
Solution Approach 1:
The catalyst system is enhanced by combining conventional hydroisomerisation catalysts with nitrogen heterocycle compounds to create a composite catalytic system. This composite approach leverages the advantages of both components to achieve superior selectivity for iso-paraffin production while maintaining catalyst structural simplicity and cost-effectiveness.
Solution Approach 2:
The nitrogen heterocycle acts as a mediator between the catalyst and hydrocarbon feed, enhancing the catalyst's ability to selectively produce iso-paraffins. The additive modifies the catalyst surface properties or reaction pathway to improve manufacturing precision of the desired product ratio.
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 increases the yield of base oil by incorporating a substituted or unsubstituted nitrogen heterocycle with zeolite SSZ-91, enhancing the production efficiency and quality of hydroisomerised products.
Implementation Method 1
hydroisomerisation is a process which increases the ratio of iso-paraffins to n-paraffins as a hydrocarbon feed is hydroisomerised
Implementation Method 2
contacting the combined feed with a hydroisomerisation catalyst comprising zeolite SSZ-91
Data Source
AI summary
Described herein is a process for hydroisomerising a hydrocarbon feed. The process may comprise: combining a hydrocarbon feed and a hydroisomerisation additive to provide a combined feed; and contacting the combined feed with a hydroisomerisation catalyst comprising zeolite SSZ-91, where the hydroisomerisation additive is a substituted or unsubstituted nitrogen heterocycle.