Baking soda generally refers to Sodium bicarbonate, and its molecular formula is NaHCO? , is an inorganic compound, white powder or fine crystal, odorless, salty, soluble in water, slightly soluble in ethanol (insoluble), and slightly alkaline in aqueous solution. It is easy to decompose when heated, and slowly decomposes in humid air to produce carbon dioxide, which begins to decompose at about 50℃ and is completely decomposed when heated to 270℃.

In case of acid, it is strongly decomposed to produce carbon dioxide. Sodium bicarbonate is widely used in chemical industry, medicine, food, light industry, textile and other industrial fields and people's daily life, and plays an important role in the national economy.

study history

179 1 year, French chemist Nicolas Leblanc prepared sodium carbonate, which laid the foundation for the synthesis of sodium bicarbonate. 180 1 year, the German pharmacologist Valentin Ross reported the discovery of sodium bicarbonate. 1846, American bakers John Dwight and Austin church set up the first factory to produce sodium bicarbonate from sodium carbonate and carbon dioxide in the United States.

186 1 year, Belgian chemist Solvi developed an industrial method for producing sodium carbonate and sodium bicarbonate. 1942, Hou Debang, a chemical expert in China, invented the combined soda production method on the basis of solvay process. In addition to extracting from natural minerals, most of the industrial sodium bicarbonate in the world is influenced by Solway method.

Industrial use

Sodium bicarbonate can be used to produce acid-base fire extinguishers and foam extinguisher, and it can be used to produce rubber and sponge in rubber industry. Sodium bicarbonate can be used as a flux for casting steel ingots in metallurgical industry. In the mechanical industry, sodium bicarbonate can be used as a molding aid for cast steel sand molds.

In printing and dyeing industry, sodium bicarbonate can be used as fixing agent, acid-base buffer and post-treatment agent for fabric dyeing and finishing. Adding baking soda in dyeing can prevent the yarn tube from producing colored flowers and can also be used as a detergent for wool.