Method for Synthesizing Hexagonal and Cubic Ordered Mesoporous γ-ALUMINA
Categories for this Invention
Technology:Synthesis of ordered mesoporous γ-alumina (OMA);
Industry: Chemical Plant, Manufacturing.
Applications: Catalyst, Advanced Material.
Market: The global catalyst market is projected to USD48.9B by 2030 & grow at a CAGR of 5.6% during forecast period of 2023 to 2030.
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Problem Statement
- In the present era, Alumina has tremendous applications in various fields of science viz. catalysis, sorption, separation, & the properties for which Alumina is well known as low electric conductivity, resistance to chemical attack, high strength, extreme harness & high melting point.
- In applications like catalysis, the absence of uniform mesoporosity in alumina can cause sluggish diffusion of the reactants which leads to rapid deactivation of the catalyst under harsh reaction conditions.
- Therefore, any significant advances in improving the structural, textural & chemical properties of alumina can find direct applications in industrial catalysis.
- Further a few non-patent literatures discussed regarding the synthesis of ordered mesoporous structure of alumina with a couple of difficulties, & present invention has addressed the issues in efficient manner.
Technology
- Present invention describes a method for synthesis of ordered mesoporous γ-alumina (OMA) comprises a few steps explained in smart chart hereinbelow:
- Dissolving 0.5-4 g of amphiphilic substance in ethanol to form a solution;
- Adding media to the solution under vigorous stirring; & adding 1.5-5.5g of aluminium iso-propoxide;
- Continuous stirring at room temperature for 4-5 hours; & drying the obtained solution 50-80°C for 45-55hours; and
- Calcination of the solids obtained at 550°C-750°C for 4-6hours in air.
- The media is acidic & the amphiphilic substance comprisenon-ionic surfactant.
- The synthesized ordered mesoporous γ-alumina comprises each one of:
- Cubic-FCC (Fm3m) (MAA-108-F),
- Cubic-BCC (Im3m) (MAA-108-B) and
- Cubicgyroidal (Ia3d) (MAA-108-G) pore symmetries.
- Said acid-mediated synthesis, the non-ionic surfactant comprises a Pluronic (Poloxamer) F108.
- The acidic media comprise 1.3-1.6 ml of 37 wt% HCL and 0.5g citric acid.
Key Features / Value Proposition
Technical Perspective:
- In the acid-mediated synthesis, the amphiphilic substance 0.75g of Pluronic F108 dissolved in 20ml ethanol at 35°C, directs the self-assembly to form Fm3m symmetry (MAA-108-F) mesophase of ordered mesoporous γ-alumina(OMA).
- Further, the amphiphilic substance 1.0-1.3g of Pluronic F108 dissolved in 20ml ethanol at 35°C, directs the self-assembly to form Im3m symmetry (MAA-108-B) mesophase of ordered mesoporous γ-alumina (OMA).
- Moreover, the amphiphilic substance 1.7g of Pluronic F108 dissolved in 20ml ethanol at 35°C, directs the self-assembly to form gyroidal Ia3d symmetry (MAA-108-G) mesophase of ordered mesoporous γ-alumina (OMA)
Industrial Perspective:
- The mesoporous alumina obtained by the method have direct advantages in enhancing catalytic stability, diffusion properties & cost-effective.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. P. Selvam
NCCR & Department of Chemistry
Intellectual Property
- IITM IDF Ref. 1857
- IN Patent No.383658
- PCT Application No. PCT/IN2020/050590
Technology Readiness Level
TRL-4
Technology validated in Laboratory