Electrolytic TiO2 Production via Seed Particle Release
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Solution Overview
Problem
The cost of producing titanium dioxide (TiO2) through traditional processes has increased significantly, prompting the need for alternative routes that can efficiently produce high-quality rutile TiO2 particles for industrial applications.
Innovation Solution
The method involves electrolytic precipitation of TiO2 from an electrolyte solution containing titanium oxychloride (TiOCl2), where TiO2 seed particles are deposited onto a substrate and then released into the solution, allowing for the production of discrete rutile TiO2 particles with controlled size and shape, suitable for use as a pigment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional sulfate process or chloride process is used to produce TiO2, then TiO2 can be produced commercially, but the production cost has increased significantly
Solution Approach 1:
The invention changes the chemical parameters of the electrolyte solution, specifically using titanium oxychloride (TiOCl2) instead of traditional sulfate or chloride routes. By adjusting electrolyte composition (TiOCl2 concentration: 0.05-2.0 M, temperature: 20-100°C, pH control), the process achieves cost-effective TiO2 production while maintaining high purity and rutile crystal structure formation
Solution Approach 2:
The invention replaces traditional chemical precipitation methods with an electrochemical system. Electrical current is applied to reduce Ti(IV) to Ti(III) at the cathode, which then precipitates as TiO2. This electrochemical approach substitutes complex chemical processing with a more controllable electrical field-based method, reducing overall process cost
2Manufacturing precision
If TiO2 particles are produced for coating applications, then pigment performance is required, but particle size control below 1 micron is challenging
Solution Approach 1:
The invention introduces dynamic control of particle formation through electrochemical parameters. By adjusting current density, temperature, and electrolyte composition during the electrochemical reduction process, particle size is dynamically controlled to remain below 1 micron. The continuous adjustment of electrical parameters during deposition enables precise size control while maintaining high production rates
Solution Approach 2:
The invention performs preliminary electrochemical reduction of Ti(IV) to Ti(III) at the cathode surface before final precipitation. This preliminary action creates controlled nucleation sites that guide subsequent TiO2 particle formation, ensuring uniform sub-micron particle sizes. The pre-formed Ti(III) layer acts as a template for controlled particle growth
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 method produces TiO2 particles with sizes less than 1 micron, suitable for coating applications, and can replace traditional TiO2 production methods, offering cost-effective and efficient production of high-quality rutile TiO2 particles.
Implementation Method 1
a cathode is electroplated with a metal oxide using a non-consumable anode. In an electrolytic cell containing an electrolyte solution, upon application of an electric current to the anode, the metal oxide plates out onto the cathode
Implementation Method 2
the metal oxide plates out onto the cathode
Implementation Method 3
the metal oxide formed on the cathode then seeds precipitation of metal oxide particles from the electrolyte solution
Data Source
AI summary
Disclosed is a method of producing metal oxides, comprising electrodepositing a metal oxide from an electrolyte solution onto a substrate to coat at least a portion of the substrate, whereby metal oxide seed particles are released into the solution, and precipitating metal oxide particles from the solution. The precipitated metal oxide particles have a maximum particle size of less than 1 micron.