Hydrocracking Catalyst Organic Additive Aromatic Hydrogenation
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Solution Overview
Problem
Existing hydrocracking catalysts exhibit low conversion activity for aromatic hydrogenation, which limits their effectiveness in hydrocracking reactions.
Innovation Solution
A hydrocracking catalyst comprising acidic silica-alumina, alumina, VIII Group metal components, VIB Group metal components, and an organic additive, specifically designed to enhance aromatic hydrogenation activity, with the organic additive improving the catalytic performance by adjusting the molar ratio and incorporating a zeolite molecular sieve for improved pore structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydrocracking catalysts containing acidic silica-alumina, alumina, VIII Group metals, and VIB Group metals are used, then the catalyst provides basic cracking and hydrogenation activity, but the aromatic hydrogenation conversion activity remains low
Solution Approach 1:
The patent introduces an organic additive component that changes the chemical parameters of the catalyst system. This additive modifies the electronic properties and surface chemistry of the catalyst, thereby enhancing the aromatic hydrogenation conversion activity from 3.2% to significantly higher levels while maintaining overall catalytic reliability
Solution Approach 2:
The patent creates a composite catalyst system by combining conventional inorganic components (acidic silica-alumina, alumina, VIII Group metals, VIB Group metals) with an organic additive. This composite structure synergistically improves aromatic hydrogenation activity while preserving the base catalyst's cracking and hydrogenation functions
2Productivity
If the catalyst composition is modified to improve aromatic hydrogenation activity, then conversion efficiency increases, but the complexity of catalyst formulation increases
Solution Approach 1:
The organic additive is introduced with controlled parameters including specific content ranges (0.1-5.0 wt%), molar ratios relative to VIII Group metals (0.01-0.5), and molecular weight specifications (100-1000). These parameter controls simplify the formulation process by providing clear design guidelines while achieving the desired 3.2%+ improvement in aromatic hydrogenation activity
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 catalyst demonstrates significantly increased aromatic hydrogenation conversion activity, with a 3.2% improvement over reference catalysts, and enhances the yield of <350°C product oil while lowering the refractive index of the product oil, indicating higher conversion efficiency.
Implementation Method 1
A hydrocracking catalyst comprising acidic silica-alumina, alumina, at least one VIII Group metal component(s), at least one VIB Group metal component(s)
Implementation Method 2
a hydrocracking catalyst comprising acidic silica-alumina, alumina, at least one VIII Group metal component(s), at least one VIB Group metal component(s), and an organic additive
Implementation Method 3
incorporating a zeolite molecular sieve for improved pore structure
Implementation Method 4
an organic additive, specifically designed to enhance aromatic hydrogenation activity, with the organic additive improving the catalytic performance
Data Source
AI summary
The present invention relates to a hydrocracking catalyst comprising an acidic silica-alumina, an optional alumina, an effective quantity of at least one VIII Group metal component(s), an effective quantity of at least one VIB Group metal component(s) and an organic additive, wherein the organic additive is one or more selected from the group consisting of an oxygen-containing or nitrogen-containing organic compound, and the molar ratio of the organic additive to the VIII Group metal component(s) is 0.01-10. The present invention relates further to a process for producing the hydrocracking catalyst and use of the catalyst in a process for hydrocracking hydrocarbon oils. The hydrocracking catalyst provided according to the present invention shows a higher activity for aromatic hydrosaturating and ring-opening reaction, as compared with the prior art hydrocracking catalyst.