Porous Silicate Composite for Water Remediation
Official patent title
Fabrication of SiO2/Mn7O12Si/Pb2SiO4 nanocomposites using sol-gel method
Arabic title: تصنيع مركبات نانوية من SiO.SUB.2./Mn.SUB.7.O.SUB.12.Si/Pb.SUB.2.SiO.SUB.4 باستخدام طريقة sol-gel
Invention
Invention
Problem
Preparing porous silica, manganese-silicate, and lead-silicate materials with controlled phase composition and morphology is difficult using conventional multicomponent processing.
Why it matters
A controlled porous composite may support contaminant-immobilization research, but lead-containing materials require particularly careful leaching, exposure, recovery, and disposal validation.
Approach
A sol-gel process combines manganese and lead salts with a silicate ester, adds aqueous ammonia to form a gel, dries the washed material, and calcines it. The product contains Pb2SiO4, Mn7O12Si, and two SiO2 crystalline phases.
Who may benefit
Potential beneficiaries include silicate-material researchers, environmental-remediation laboratories, specialty ceramic producers, nanomaterial characterization groups, and teams studying immobilization matrices.
Potential value
The route integrates four identified crystalline phases in a porous particulate material with specified elemental ranges, crystallite size, morphology, and sol-gel conditions.
Background
Background
Multicomponent nanomaterials can combine structural or surface properties unavailable from single phases, but inconsistent crystallization and complex thermal processing hinder reproducibility. The publication addresses integration of lead silicate, manganese silicate, and two silica phases through sol-gel preparation. It proposes contact with water containing inorganic contaminants. The supplied evidence describes composition, crystallite size, particle morphology, pores, and processing, but does not report immobilization capacity, selectivity, kinetics, lead or manganese leaching, regeneration, or realistic-water performance.
Technology overview
Technology overview
An aqueous solution of manganese salt, lead salt, and a C1-C8 silicate ester receives aqueous ammonia and is stirred for 0.5–2 hours to form a gel. After filtration and washing, the residue is heated at 100–200 °C and calcined at 700–1000 °C. XRD identifies Pb2SiO4, tetragonal Mn7O12Si, hexagonal SiO2, and orthorhombic SiO2. The patent specifies 55–65 nm crystallites, polygonal particles and aggregates, and pores exceeding 50 nm in some fractions.
Potential applications
Potential applications
- Candidate immobilization of inorganic water contaminants.
- Porous silicate matrices for environmental-material research.
- Multiphase lead-manganese-silica composite studies.
- Sol-gel process development for specialty ceramic powders.
Evidence-supported advantages
Evidence-supported advantages
- One sol-gel route integrates four crystalline phases.
- Elemental, crystallite, particle, and pore ranges are specified.
- Salt and silicate-ester alternatives are described.
- XRD, SEM, and elemental characterization are referenced.
Development stage
Development stage
Laboratory synthesis with XRD, SEM, and elemental characterization is described; contaminant immobilization, leaching safety, scale-up, and commercialization were not established.
Commercial opportunity
Commercial opportunity
The material may interest immobilization-matrix or specialty-silicate developers, but commercialization requires independent capacity and leaching tests, realistic-water selectivity, long-term stability, regeneration or secure disposal, worker-exposure controls, lead recovery, scale-up reproducibility, furnace economics, and regulatory assessment. Environmental performance and safety are not established by the patent record.
Patent classifications
Patent classifications
WIPO IPC
- C01B33/20Non-metallic elements; compounds thereof
- C01B33/18Non-metallic elements; compounds thereof
CPC
- C01B33/18Non-metallic elements; compounds thereof
- C01B33/20Non-metallic elements; compounds thereof
- C02F1/281Treatment of water, wastewater, sewage or sludge
- C01P2004/03Indexing scheme for structural and physical aspects of solid inorganic compounds
- C01P2004/51Indexing scheme for structural and physical aspects of solid inorganic compounds
- C01P2004/61Indexing scheme for structural and physical aspects of solid inorganic compounds
- C01P2006/16Indexing scheme for structural and physical aspects of solid inorganic compounds
- C01P2002/72Indexing scheme for structural and physical aspects of solid inorganic compounds
- C01P2002/60Indexing scheme for structural and physical aspects of solid inorganic compounds
Inventors
Inventors
- First inventorEhab Abdelhamed Abdelrahman Ahmed
Keywords
Keywords
- silicon dioxide
- manganese silicate
- lead silicate
- nanocomposite
- sol-gel
- porous material
- contaminant immobilization
- lead leaching
Patent document and drawings
Patent document and drawings
The patent publication is mapped to this record. Patent drawings remain within that publication; no separately cleared public media package has been supplied.