Inorganic Chemicals

The content of calcium in the earth's crust is 3%, ranking fifth only to oxygen, silicon, aluminum and iron, and mostly exists in the form of ions or compounds; The main mineral sources in industry, such as limestone, gypsum and so on. Calcium can be used as oil dehydrating agent, metallurgical reducing agent and deoxidizing agent of alloys. It is mainly used in industrial and medical fields.

Selenium dioxide is mainly defined as oxidation reagent in organic synthesis, and it participates in many oxidation reactions. Due to the toxicity of the reagent, many reactions have been gradually replaced by other better reagents in recent years. However, the oxidation of selenium dioxide with active methyl, methylene and methylene still plays an important role in the conversion of organic chemical functional groups.

It is mainly used for sulfonation and sulfation of organic compounds. It is widely used as reactant in the production of surfactant and ion exchange resin. It is also used in the synthesis of sulfonamides. It is used for the production of dye intermediates and the refining of petroleum lubricating fractions.

To produce lead metal and its compounds. It is also used for the manufacture of batteries, white pigments, lead danders, and fast drying lacquers. Used as catalyst in oxalic acid production. It is also used in stone impressions, weight gain agents for fibers, and so on.

Titanium tetrachloride is the most important titanium halide. It is an important raw material for the production of titanium sponge and titanium dioxide by chlorination. Pure titanium tetrachloride is a colorless, transparent, dense, non-conductive liquid with pungent acid taste, easy to hydrolyze, and generates white smoke in humid air. It dissolves in water and decomposes at the same time. It also dissolves in alcohol and concentrated hydrochloric acid, and is mutually soluble with chloroform and carbon tetrachloride. Titanium tetrachloride is prepared by mixing titanium dioxide, carbon powder and maltose, then coking, adding chlorine above 600 ℃ or chlorinating with chlorinating agent (such as carbon tetrachloride). Titanium tetrachloride is also an important component of ethylene polymerization catalyst. It is used as smoke agent in military and mordant in dye industry.