Industrial hydrochloric acid manufacturers: The role of hydrochloric acid in industry

Hydrochloric acid, also known as hydrochloric acid (HCI) in aqueous solution, is the original acid. Industrial hydrochloric acid manufacturers provide a detailed explanation of the main functions of hydrochloric acid in the early industrial stage. Wet metallurgy of rare metals: Examples from industrial hydrochloric acid manufacturers: When smelting tungsten, scheelite is first mixed with sodium carbonate and roasted in air to produce sodium tungstate CaWO4+Na ₂ CO3=Na2WO4+CaO+C02 ↑. Soak the sintered material in water at 90 ℃, dissolve sodium tungstate, and add hydrochloric acid for acidification. Filter the precipitated tungstic acid and then burn it to oxidize it into tungsten Na2WO4+2HCI=H2WO4 ↓ 2CaCI, H2WO4=WO3+H2O ↑. Heating tungsten oxide in hydrogen yields metallic tungsten WO3+3H2=W+3H2O ↑. Subsequently, industrial hydrochloric acid manufacturers undergo an addition reaction between hydrogen chloride and acetylene at temperatures ranging from 180 ° C to 200 ° C with mercury salts as catalysts, resulting in the formation of vinyl chloride. Under the action of initiators, polyvinyl chloride is polymerized.

The bleaching and dyeing industry uses hydrochloric acid for acid washing of cotton fabrics after bleaching and neutralization of residual alkali after cotton fabric finishing. During the printing and dyeing process, some of the fuel is insoluble in water, so it needs to be treated with hydrochloric acid to become a soluble hydrochloride salt before it can be used.

Metal processing: In the pre-treatment of steel parts before plating, first wash them with caustic soda solution to remove oil stains, and then soak them in hydrochloric acid. Before welding the metal, it is necessary to apply a little hydrochloric acid or other substances to the welding position, which utilizes the properties of hydrochloric acid as a metal oxide to remove rust. Only then can it be firmly plated on the surface of the metal.