The modification method of surface-treated titanium dioxide is characterized by first placing the core-coated titanium internal powder in an ionic polyacrylamide aqueous solution and dispersing it with the help of mechanical grinding. Then, the dispersed core is double-coated with an inorganic composite oxide and an organic composite oxide. The inorganic inner layer coating uses the sol-gel method: the organic outer layer coating uses adsorption between polar chemical bonds. After coating, the filter cake obtained by filtration is dried by a crushing dryer and collected into fine and ultra-fine titanium dioxide products in a cyclone separator and bag filter respectively.

An organic surface treatment method for improving the dispersibility and temperature resistance of titanium dioxide in oily paint, characterized in that: first, a special organosilicon material with an appropriate viscosity is added to an appropriate amount of industrial ethanol, and then sulfuric acid process rutile titanium dioxide that has been inorganically coated with silicon and aluminum is added, and the pulping treatment is carried out for 30 minutes; the titanium dioxide is baked in an oven at 110 degrees for 4 hours, and after cooling, the titanium dioxide is crushed with a small air flow mill to obtain the required titanium dioxide.

There are two methods for producing titanium dioxide: sulfuric acid method and chlorination method. The raw materials required for the sulfuric acid method are titanium concentrate, titanium slag and sulfuric acid. Its advantages are: mature technology, simple equipment, easy to solve anti-corrosion materials, and can produce leap-titanium type titanium dioxide that the chlorination method cannot produce but is needed by the market. Disadvantages are: long process, can only be mainly intermittent operation; wet operation, high consumption of sulfuric acid and water, many wastes and by-products, serious environmental pollution, each ton of finished titanium dioxide will discharge 8 tons of waste acid and more than 3 tons of ferrous sulfate, and a large amount of sewage; and the quality of the titanium dioxide produced is relatively poor.

Synthetic resin: Synthetic resin is the main component of plastic products, mainly including polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), polyester (such as PET, PBT), polyamide (such as PA6, PA66), polyacrylamide (PAN), etc. Different synthetic resins have different physical properties and uses, which can be selected and applied according to needs.

Preparation of titanium liquid

Hydrolyzed titanium liquid: grind the titanium concentrate to a fineness of 325 mesh and the residue accounts for 4-15% (the fineness mainly affects the acidolysis rate. If the fineness is too coarse, the acidolysis rate is low; if it is too fine, as the acidolysis rate increases, there is a risk of boiling or explosion). Then use a pulse pneumatic conveying pump to send the crushed ore powder to the acidolysis station in batches; react the ground titanium concentrate with sulfuric acid to generate soluble solid phases such as titanium salts and iron salts, and extract the solid phase to obtain titanium sulfate solution and iron salt solution; then remove mechanical impurities and colloidal particles in the titanium liquid through sedimentation and pressure filtration to produce fully purified titanium liquid; mix the filtered clarified titanium liquid to obtain hydrolyzed titanium liquid. The specific index parameters of the hydrolyzed titanium liquid are shown in Table 1;

Seed titanium liquid

Grind the titanium slag (or slag ore mixture) to a fineness of 325 mesh and the residue accounts for 3-15%, and then the crushed ore powder is sent to the acid hydrolysis station in batches by a pulse pneumatic conveying pump; the titanium slag is reacted with sulfuric acid to generate soluble solid phases such as titanium salts and iron salts, and the solid phases are leached to obtain titanium sulfate solution and iron salt solution; then the mechanical impurities and colloidal particles in the titanium liquid are removed by sedimentation and pressure filtration to produce fully purified titanium liquid; the filtered clarified titanium liquid is prepared to obtain a seed titanium liquid

Titanium dioxide has the effects and functions of sun protection and whitening, and is also used as a food additive and in the production of medicines. Titanium dioxide is a non-toxic, odorless, white chemical product with excellent chemical stability and light stability. It is an efficient photocatalyst.