Hydrofluoric acid uses and tips

Because of the ability to dissolve oxides, hydrofluoric acid plays an important role in the purification of aluminum and uranium. It has many uses, for example, hydrofluoric acid is used to etch the glass, carve, tag and text; semiconductor industry uses it to remove oxides on the silicon surface; it can be used as isobutane and butene alkylation catalyst in refinery; etc. Hydrofluoric acid is also used for a variety of synthesis of fluorine-containing organic compounds, such as Teflon (PTFE) and refrigerants like freon.

Hydrofluoric acid is the aqueous solution of hydrogen fluoride, clear, colorless, corrosive liquid smoke, intense unpleasant smell. -83.3 degrees melting point, boiling point of 112.2 ℃, density 0.888g/cm ³. Because hydrogen and fluorine atoms combined capacity is relatively strong, this makes hydrofluoric acid in the water not fully ionized, so in theory a low concentration of hydrofluoric acid is a weak acid. It is highly corrosive, acutely corrosive action on metals, glass and Silicon-containing objects. Laboratory general use of Fluorite (composed mainly of calcium fluoride) and concentrated sulfuric acid to produce, and it needs to be sealed in a plastic bottle and kept in the shade.

Recently, the anhydrous hydrofluoric acid market slightly downward. At present, fluorite powder upstream of hydrofluoric acid market is less than the beginning of the month, price has made many callbacks, domestic sulfuric acid market continues weak. This is only for reference.
The main ingredient of fluorspar is calcium fluoride (CaF2), it is the base and source of fluorine chemical industry as a whole. According to United States Geological Survey data, fluorite resources in global distribution is relatively concentration, the major producer are South Africa, Mexico, Mongolia, China, Russia, the United States, Thailand, Spain and other countries. As HF production depends on fluorite resources, so the enterprises concentrate in East China the rich fluorite resources places. From the late 20th century to 2010, due to the control of fluorite resources in China and the rapid rise of the fluorine chemical industry, this led to the development of hydrofluoric acid and its downstream products, Chinese exports of fluoride products rapidly.

Emergency treatment of HF spill is to evacuate personnel to safe areas, isolation and strict restrictions on access. Recommended emergency personnel wear positive pressure self-contained breathing apparatus, and wear anti-acid clothes. Cut off the source of the leak as possible to prevent them from entry into sewers, drainage ditches and other restricted spaces. If a small amount of leak, mix sand, dry lime and soda ash. Also large amounts of flushing water is available, pour them into the wastewater system after wash water diluted. If you want to get more details about okchem, please click here!