Advanced Innovative TiO2 Sulfate Technology

Half of the world TiO₂ market products are produced by sulfate process. There are more than fifty sulfate TiO₂ production plants all over the world. Most of them are located in Europe, Asia and South America. Those TiO₂ sulfuric plants have problems with disposal of liquid and solid wastes, air emissions or carbon footprint, to a greater or lesser extent. Due to the fact, that 70 tons of waste requiring disposal are produced for one ton of produced titanium dioxide, several different practices for the utilization of hydrolysis acid and acid wastes from the sulfate process exist in the world: one of the methods is a potential source of large-scale environmental disasters, others excessively increase high capital and operating costs or are not environmentally friendly and cost-effective.

Evaporation of weak acid containing 25% to 68% of H₂SO₄ and its further use for various needs, for example, in the production of mineral fertilizers, or strengthening of the acid from 68% to 94% with concentrated sulfuric acid or oleum and its further reutilization for ilmenite decomposition. This method is unacceptable for acidic wastes with low concentration of H₂SO₄, due to excessively high capital and operating costs.

Drawbacks:

- Increased production cost (evaporated sulfuric acid is about 4-5 times more expensive than fresh sulfuric acid).

- Impossibility for most manufacturers to evaporate the entire volume of hydrolysis acid due to the disbalance of flows;

and an attempt to solve the problem by evaporating to a higher concentration leads to a significant increase in capital costs and even greater increase in production costs.

- Generation of iron sulfate monohydrate as a waste with high content of free sulfuric acid, which requires disposal.

Neutralization of weak sulfuric acid with limestone and/or lime milk and, as a result, formation of gypsum.

Drawbacks:

- When the entire volume of hydrolysis acid formed is neutralized, a huge amount of gypsum is produced as a solid waste (~ 4-5 tons per 1 ton of titanium dioxide), requiring further utilization. Land disposal of such amounts of waste is prohibited in some countries, for example, in the European Union, Directive 92/112/ EEC (Article 7) limits the amount of gypsum waste to be discharged at the level not exceeding 0.8 tons per 1 ton of titanium dioxide.

- Large areas are required for the disposal of solid wastes (gypsum).

- Use of cheaper limestone increases carbon footprint due to CO₂ emissions as a result of neutralization reaction, and the use of more expensive lime milk significantly increases the cost of the process.

EXISTING PRACTICES FOR THE ULITIZATION OF HYDROLYSIS ACID AND ACID WASTES FROM THE SULFATE PROCESS:

Discharge into water

Evaporation of weak acid

Neutralization

ENVIRONMENTAL-FRIENDLY&COST-EFFECTIVE SOLUTION FOR SULFATE TiO₂ PRODUCTION PLANTS DOES EXIST!

– New Prospects for the Development of Sulfate TiO₂ Technology

Economic
Efficiency

Creating a portfolio of
high value-added products makes production flexible to changing markets, thus, leading to significant increase in economic numbers of production in comparison with conventional sulfate and chloride technologies.

Energy
Efficiency

Reduction of fresh water, natural gas,
power and steam consumption leads to maximum energy efficiency.

GET A BROCHURE WITH FURTHER DETAILS FOR FREE

The brochure will be sent to your email address.

OUR TEAM

Viktor

Troshchylo

Andriy

Gonchar

Mykola

Medvid

Oleksandr Chukhmanov

ASSOCIATED AND MAIN PARTNERS:

WE EXPERIENCED TO WORK WITH:

AITiO₂ST™