The hottest Shandong enterprise completed the prod

Shandong enterprises have completed the titanium dioxide production process test

the cleaner production molten salt process led by Professor Qi Tao of the Institute of process of the Chinese Academy of Sciences can be used for the production of titanium dioxide from titanium concentrate and the acid hydrolysis residue (black mud) of titanium dioxide by sulfuric acid method can also be recovered. The industrial test of titanium dioxide production process has been completed in Shandong Dongjia group

Cristal, the second largest titanium dioxide production company at present, invested 1.5 million US dollars during the period of the former American Union Company. Professor profjha of the University of Leeds, UK, studied and applied for a patent for a green extraction process. This method uses alkali and ilmenite to roast at 850 ~ 875 ℃, and then uses organic acid to leach to remove impurities in it. The output of titanium compounds obtained is 95% - 97% of artificial rutile, The particle size of the product is 150 ~ 300 μ M; Calcium content is 0.3%, iron content is 1% - 1.5%, and aluminum content is less than 0.5%. The consumption of chlorine used in the production of titanium dioxide by chlorination method is less than 20 times that of the traditional method

due to many factors such as liquid-liquid separation of solvent extraction, the project failed to achieve its goal, and there was no commercial production. There is also a molten salt production process, which uses alkali melting to decompose titanium raw materials, acid dissolution, hydrolysis, precipitation and calcination to produce titanium dioxide

these newly developed processes are likely to cause dangerous situations such as machine failure and personal injury due to the whole life of device equipment or material and carbon footprint. The three-phase construction cycle of the project is not perfect, and even economic problems, there is no commercial production device. Therefore, the existing production technology of titanium dioxide in the world remains the classic sulfuric acid process and chlorination process; However, with the progress of society, the classic sulfuric acid method and chlorination method are also constantly improved and perfected due to the development of science and technology. In addition to the past environmental protection, health and safety (EHS), it is more necessary to meet the new ecological civilization requirements of "low carbon" and "sustainable development" with the development of society

titanium dioxide production technology has been known since the sulfuric acid titanium dioxide production process was introduced in 1916 of the last century, until 1, especially the impact on the small scale plate was more significant. In 958, the production unit of the chlorination process was put into operation. The development of titanium dioxide production process has experienced nearly 100 years of sulfuric acid process and nearly 60 years of chlorination process

because elemental fluorine is easier to react with titanium than elemental chlorine to produce titanium fluoride, some companies in the United States have carried out a large number of fluorination process research and developed the process of production experimental devices. Because fluoride, especially hydrogen fluoride, is more harmful and safe to people and the environment than chlorination, they have to give up the development of this process

at the beginning of this century, on April 23, 2002, altairnanomaterialsinc Applied for invention patent (). This process is different from sulfuric acid process and chlorination process. Sulfuric acid method is to decompose titanium raw materials with sulfuric acid, then precipitate metatitanic acid, carry out liquid-solid separation and calcine to produce titanium dioxide (mainly solid-liquid separation); The chlorination method is to decompose titanium raw materials with chlorine to generate gas chloride, and then carry out gas-solid and gas-liquid separation and gas-phase oxidation to produce titanium dioxide (mainly gas-solid separation)

ortel company is a process of decomposing titanium raw materials with hydrochloric acid, then carrying out volume extraction (liquid-liquid separation), precipitation and calcination after pyrolysis to produce titanium dioxide, so it is called hydrochloric acid production process. The production process of titanium dioxide is as follows: hydrochloric acid leaching and decomposition of ilmenite, separation of insoluble residues; The leaching solution is reduced to low valence iron by high valence iron, cooled and crystallized to produce ferrous chloride, and then ferrous chloride is separated; The titanium containing leaching solution after the separation of ferrous chloride is subject to the first solvent extraction. The extraction phase is a solution containing titanium and high iron, and the raffinate phase is an aqueous solution containing ferrous chloride. The rigid polyurethane foam has high shrinkage strength, adhesion and shear strength. It is returned to the process to regenerate hydrochloric acid and returned to the leaching process; The extraction phase containing titanium is extracted for the second time. The extraction phase is an aqueous solution containing titanium, and the remaining phase is an aqueous solution containing high iron, which is returned to the hydrochloric acid regeneration process; The titanium chloride solution after extraction and purification is hydrolyzed. The best hydrolysis is spray heating hydrolysis to obtain metatitanic acid. The gaseous hydrochloric acid and water return to the hydrochloric acid regeneration system. The hydrolyzed metatitanic acid is calcined, wet ground, inorganic coated, filtered, washed, dried, powdered and packaged

note: the reprinted content is indicated with the source. The reprint is for the purpose of transmitting more information, and does not mean to agree with its views or confirm the authenticity of its content