Dongjia, Shandong Province, completed the test of the production process of titanium dioxide

China Coatings Network
News: The clean production of molten salt led by Professor Qi Tao of the Chinese Academy of Sciences, can be used for titanium refined ore production
tumium dioxide
, can also be recovered sulfuric acid titanium dioxide acid slag (black mud), has completed the titanium dioxide production process industrial test in Shandong Dongjia Group.
Cristal, now the second-largest titanium dioxide producer, paid $1.5 million during his time at the former American Union to study and patent a green extraction process by Professor Prof Prof. Roasted at 0 to 875 degrees C, and then soaked with organic acid to remove impurities, the resulting titanium compound yield reached 95% to 97% of the artificial redstone, the product particle size between 150 to 300 m; Calcium content of 0.3%, iron content of 1% to 1.5% and aluminum content of 0.5% or less. Used for chlorination to produce titanium dioxide powder than traditional consumption of less than 20 times chlorine.
, due to solvent extraction fluid separation and many other factors caused the project to fail, there is no commercial production. There is also a molten salt method production process, the process with alkali melting decomposition of titanium raw materials, acid-soluble water dissolved precipitation calcination production of titanium dioxide.
these newly developed processes have not been commercialized due to equipment or materials, the full life cycle of the carbon footprint, and even economic problems. Therefore, the world's existing titanium dioxide production process technology, but also retained in the classic sulfuric acid method and chlorination method two production processes; However, with the progress of society, the classical sulphuric acid method and chlorination method of scientific and technological development is also constantly improved and perfected, in addition to the past environmental protection, health, safety (EHS), but also with the development of society to meet the "low carbon" and "sustainable development" of the new ecological civilization requirements.
Titanium dioxide production technology since the last century in 1916 titanium dioxide production process, until 1958 chlorination process production plant put into operation, titanium dioxide production process development of sulfuric acid method has experienced nearly a hundred years, chlorination method also experienced nearly 60 years.
Because the element fluorine is easier to react with titanium than the element chlorine to produce titanium fluoride, there have been a number of companies in the United States to carry out a large number of fluoride process research, and carried out the production of experimental device process development, because fluoride, especially hydrogen fluoride on the human and environmental harm and safety is greater than chloride and had to abandon the development of this process.
23, 2002, at the beginning of this century, Altair Nanomaterials Inc. Patents for inventions (10-11) were filed. The process is different from the sulphuric acid production process and from the chlorination process. Sulphuric acid method is based on sulfuric acid decomposition of titanium raw materials, and then precipitated out of partial titanium acid and liquid solid separation and calcination to produce titanium dioxide (mainly solid separation); Chlorination method is based on chlorine gas decomposition of titanium raw materials to produce gas chloride, and then gas solidification and gas liquid separation and gas phase oxidation production of titanium dioxide (gas solid separation mainly).
Otel is based on hydrochloric acid decomposition of titanium raw materials, and then volume extraction (liquid separation) and precipitation and pyrine calcination to produce titanium dioxide process, so the hydrochloric acid production process. The production process of titanium dioxide is: hydrochloric acid leaching decomposing titanium iron ore, separating insoluble residues; The leaching liquid is reduced to low-priced iron, and the crystallization is crystallized out of iron chloride and the iron chloride is separated. After the separation of iron chloride containing titanium leachate for the first solvent extraction, extraction phase for titanium and high-speed rail solution, extraction phase for iron-containing aqueous solution, return process for regeneration of hydrochloric acid, back to the leaching process; The extraction phase containing titanium is the second extraction, the extraction phase is a water solution containing titanium, and the extraction phase is a water solution containing high iron, which returns to the hydrochloric acid regeneration process; After extraction and purification of titanium chloride solution hydrolytic, the best hydrolytic is spray heating hydrolytic, to obtain partial titanium acid, gas phase hydrochloric acid and water return hydrochloric acid regeneration system. Hydrolysis of partial titanium acid calcination, wet grinding, inorgic coating, filtration washing, drying, powder and packaging is the product.