B-Oriented MFI Zeolite Synthesis with ODSO and Fluoride
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Solution Overview
Problem
There is a need for an efficient and economical process to treat and modify the properties of oxidized disulfide oil (ODSO) by-products from the mercaptan oxidation process in refineries to facilitate their environmentally acceptable disposal and utilize them in the synthesis of new materials, such as b-oriented MFI zeolites, which are valuable in catalytic applications.
Innovation Solution
A method involving the hydrothermal synthesis of b-oriented MFI zeolites using a fluoride-containing mineralizer and water-soluble oxidized disulfide oil (ODSO) as a sol-gel component, which induces b-orientation in MFI zeolites, enhancing diffusion, permeance, and selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydrothermal synthesis methods are used to prepare MFI zeolites, then the synthesis process is well-established and reproducible, but the zeolites exhibit limited diffusion and selectivity performance
Solution Approach 1:
The patent applies parameter changes by modifying the synthesis conditions, specifically using beta-oriented seeding and controlled hydrothermal treatment parameters (temperature, time, pH) to transform conventional MFI zeolites into beta-oriented MFI zeolites with enhanced diffusion and selectivity while maintaining synthesis reproducibility
Solution Approach 2:
The patent creates a composite structure by orienting MFI zeolite crystals in a beta-directional arrangement, forming a composite material system that combines the inherent MFI framework structure with a specific crystallographic orientation to achieve superior mass transfer properties
2Object-affected harmful factors
If oxidized disulfide oil by-products are disposed of conventionally, then environmental compliance is achieved, but valuable materials are wasted and disposal costs are incurred
Solution Approach 1:
The patent converts the harmful oxidized disulfide oil by-product into a beneficial material by using it as a precursor or additive in the hydrothermal synthesis of beta-oriented MFI zeolites, thereby eliminating disposal costs and creating valuable catalytic materials with enhanced performance
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 method produces b-oriented MFI zeolites with improved diffusion and selectivity, making them suitable for applications in zeolite membranes and other catalytic processes, while effectively utilizing ODSO by-products.
Implementation Method 1
hydrothermal synthesis of b-oriented MFI zeolites using a fluoride-containing mineralizer
Implementation Method 2
crystals precipitate from a gel, using water as a solvent
Implementation Method 3
water-soluble oxidized disulfide oil (ODSO) as a sol-gel component
Implementation Method 4
The solution is hydrothermally treated under effective conditions and for an effective time to synthesize b-oriented MFI zeolite
Data Source
AI summary
Methods are provided for hydrothermal synthesis of b-oriented MFI zeolite. The method generally comprises forming a solution of precursors and reagents in effective ratios for a b-oriented MFI zeolite including a fluoride-containing mineralizer, and water-soluble oxidized disulfide oil. The solution is hydrothermally treated under effective conditions and for an effective time to synthesize b-oriented MFI zeolite.