Introduction of sodium bicarbonate:
Sodium bicarbonate (NaHCO? , an inorganic compound, is a white crystalline powder, odorless, salty and soluble in water. It decomposes slowly in humid air or hot air to produce carbon dioxide, which 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 analytical chemistry, inorganic synthesis, industrial production, agriculture and animal husbandry.
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 Rose the Younger reported the discovery of sodium bicarbonate.
1846, American bakers John Dwight and Austin Church established the first factory in the United States to produce sodium bicarbonate from sodium carbonate and carbon dioxide.
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 Solvay method. Sodium bicarbonate can be used as analytical reagent and inorganic synthesis. It can be used to prepare sodium carbonate-sodium bicarbonate buffer solution. When a small amount of acid or alkali is added, the concentration of hydrogen ions does not change significantly, and the pH value of the system can be kept relatively stable.
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.