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US 2026/0152404 A1Published application
Synthesis of Zeolite Nanosheets from Mining Waste
OwnerAditya Newalkar, Suresh B Deshmukhinventors
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Abstract
The Synthesis of Zeolite nanosheets from mining waste without using any OSDA or chemical reagents during the secondary growth of zeolite nanosheets is disclosed. The produced Zeolite nanosheet may be a synthetic material.
Claims16
A method of synthesis of zeolite nanosheet from mining waste, said method comprising the steps of:
- a. removing impurities by pretreatment of mine tailing to obtain silica;
- b. mixing the pretreated mine tailings with an alkali solution having water as solvent, wherein molar ratios of silicon dioxide (SiO2), tetrapropylammonium hydroxide (TPAOH), sodium hydroxide (NaOH) and hydrogen dioxide (H2O) is varied based on whether zeolites are to be synthesized or all-silica zeolite are to be synthesized;
- c. mixing alkali hydroxide solution, and heating in teflon lined stainless steel autoclave with different thermal profiles depending on whether zeolites are synthesized or all-silica zeolite are synthesized;
- d. isolating, and drying synthesized zeolites, wherein drying time and calcination thermal profile is selected based on whether zeolites are synthesized or all-silica zeolites are synthesized;
- e. sintering mixture of silica and polymer that is formed into a desired shape to form a silica support;
- and
- f. depositing zeolite seeds having a predefined lamellar structure on the silica support to form the seed layer, and a film is formed by secondary growth of the lamellar structure of the zeolite membrane is thus formed.
4 more elements
A zeolite nanosheet comprising:
- a. a silica support structure;
- and
- b. a lamellar zeolite membrane having molecular pillaring coated over the silica support structure,
- wherein the zeolite nanosheet enables adsorption or desorption of gaseous material having big or small molecular size.
1 more element
Dependencies are inferred from the claim text.