Magnesium Aluminosilicate Clay Synthesis at Ambient Pressure
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Solution Overview
Problem
Current methods for synthesizing magnesium aluminosilicate clays are either costly due to hydrothermal conditions or non-quantitative due to the formation of silica-alumina gel steps, limiting their industrial scalability and effectiveness in catalytic processes.
Innovation Solution
A synthesis process combining silicon, aluminum, and magnesium components under acidic conditions, followed by an alkali base addition to form a magnesium aluminosilicate clay at ambient pressure, allowing for quantitative yield and improved catalytic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrothermal synthesis is used to produce magnesium aluminosilicate clays, then the clay structure can be formed, but the process becomes costly and difficult to scale industrially due to high temperatures and pressures
Solution Approach 1:
The patent changes the temperature and pressure parameters from hydrothermal conditions (high T and P) to ambient or near-ambient conditions. The synthesis is performed at temperatures below 100°C and at atmospheric pressure, fundamentally altering the reaction parameters to achieve the same clay structure formation without the costly and complex equipment required for hydrothermal synthesis
Solution Approach 2:
The patent introduces an organic template molecule as an intermediary that directs the assembly of magnesium, aluminum, and silicon species into the desired clay structure. This template-mediated approach enables structure formation under mild conditions by providing a molecular scaffold that guides crystallization without requiring high energy input
2Productivity
If silica-alumina gel formation is used as a precursor step, then the yield can be improved, but an additional synthesis step is required making the process more complex
Solution Approach 1:
The patent merges the silica-alumina gel formation step with the magnesium incorporation step into a single simultaneous reaction process. All three metal components (silicon, aluminum, and magnesium) are introduced together and co-precipitate/co-crystallize in one step, eliminating the need for separate gel formation and subsequent metal addition steps while maintaining quantitative yields
Solution Approach 2:
The patent performs preliminary mixing of all metal salt precursors in solution before initiating the precipitation reaction. By pre-dissolving and mixing silicon, aluminum, and magnesium salts in appropriate ratios, the system is primed for simultaneous co-precipitation when base is added, achieving quantitative yield without requiring separate gel formation steps
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 process facilitates the production of magnesium aluminosilicate clays with enhanced catalytic activity and economic benefits, suitable for hydroprocessing and other applications, with improved silicon to aluminum ratios and NMR peak characteristics.
Implementation Method 1
combining (1) a silicon component, (2) an aluminum component, and (3) a magnesium component, under aqueous conditions at a first reaction temperature and at ambient pressure, to form a first reaction mixture
Implementation Method 2
reacting the second reaction mixture at a second reaction temperature and for a time sufficient to form a product comprising a magnesium aluminosilicate clay
Data Source
AI summary
This invention is directed to a synthesis process for preparing magnesium aluminosilicate clays and to the products of said process. Briefly, a silicon component, an aluminum component, and a magnesium component are combined, under aqueous conditions and at an acidic pH, to form a first reaction mixture and subsequently the pH of the first reaction mixture is adjusted to greater than 7.5 to form a second reaction mixture. The second reaction mixture is allowed to react under conditions sufficient to form the magnesium aluminosilicate clay of the present invention. The invention is also directed to catalyst compositions comprising the magnesium aluminosilicate clays synthesized according to the process of the invention. The resulting magnesium aluminosilicate clay can be used as a catalyst or as a component in catalyst compositions. The invention is further directed to a magnesium aluminosilicate clay with a characteristic 29Si NMR spectrum and the use of said magnesium aluminosilicate clay in catalyst compositions.