US 12465907 B1Patent grantUnited States

Pechini Lead–Cobalt Oxide Material

Official patent title

Fabrication of PbO/Co3O4/MgO nanocomposite material using Pechini sol-gel method

Arabic title: تصنيع مادة نانو مركبة من PbO/Co3O4/MgO باستخدام طريقة بيتشيني سول-جل

Invention

Problem

Single-metal oxides used in catalysis or remediation can have limited thermal stability, active-site availability, or reuse, while multiphase synthesis may suffer from poor uniformity and morphology control.

Why it matters

A defined three-oxide material could support catalytic or adsorption research, but lead and cobalt toxicity, leaching, target-specific performance, reuse, and safe handling require independent assessment.

Approach

The modified Pechini method combines magnesium, cobalt, and lead precursors with tartaric acid and PEG 400, evaporates water, and calcines the solid to form PbO, Co3O4, and MgO phases.

Who may benefit

Potential beneficiaries include mixed-oxide materials laboratories, catalyst and adsorbent researchers, specialty-powder manufacturers, and process developers studying Pechini-derived multiphase composites.

Potential value

The disclosure links three specified crystalline phases and elemental ranges with rod-like and spherical morphology and a bounded precursor, stabilizer, evaporation, and calcination sequence.

Background

Lead oxide, cobalt oxide, and magnesium oxide have been investigated separately for adsorption, catalysis, and thermal functions. Single-oxide materials may have limited stability, active-site availability, or reusability, while integrating multiple oxides can make composition and morphology harder to control. The Pechini sol-gel method distributes metal precursors through chelation and a polymeric matrix before calcination. The patent applies a modified version to PbO/Co3O4/MgO, but any contemplated use must account for lead and cobalt exposure and release.

Technology overview

The composite contains orthorhombic PbO, cubic Co3O4, and cubic MgO with an average crystallite size of 75–90 nm. Claim 4 specifies 8–15 at.% lead, 15–25 at.% cobalt, and 14–22 at.% magnesium. Tartaric acid is added to magnesium nitrate hexahydrate, cobalt acetate tetrahydrate, and lead nitrate; PEG 400 stabilizes the mixture. It is stirred at 250 °C until water evaporates, and the solid is calcined at 550–650 °C for 2–4 hours.

Potential applications

Potential mixed-oxide catalyst-material research.
Potential adsorption studies after lead-leaching assessment.
Potential thermal-stability studies for multiphase powders.
Potential Pechini-process scale-up research.

Evidence-supported advantages

Combines three specified oxide phases.
Defines crystallite-size and elemental ranges.
Includes rod-like and spherical particle morphologies.
Provides bounded precursor and calcination conditions.

Development stage

Patent publication describing material synthesis and characterization; independent application performance, safety, and commercialization were not established.

Commercial opportunity

The material may interest specialty-oxide and catalyst research programs. Commercial assessment should establish target performance, phase and batch consistency, lead and cobalt leaching, worker exposure, product containment, reuse and end-of-life handling, scale-up of precursor mixing and calcination, energy demand, integration into a closed process, and whether safer materials can meet the same function.

Patent classifications

WIPO IPC

B01J23/835Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J23/75Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus

CPC

B01J23/835Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J37/12Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J37/04Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J37/08Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/51Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/393Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/55Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J23/75Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/45Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
B01J35/19Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus

Inventors

First inventorEhab Abdelhamed Abdelrahman Ahmed

Keywords

PbO
Co3O4
MgO
Pechini method
sol-gel
mixed oxide
calcination
nanocomposite

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.