Degreasing principle of hot soda ash

Soda soda is alkaline when it is heated, and oil stains are easy to generate salt from alkaline substances when it is heated, while salt is easy to dissolve in water, so oil stains can be changed into salt to remove oil stains from soda solution. Carbonate ion hydrolysis is alkaline, and the ionic equation of the reaction is: CO32-+H2O? HCO3-+OH-，HCO3-+H2O？ H2CO3+OH-, oil is hydrolyzed in alkaline solution to form water-soluble higher fatty acid salt and glycerol, which is easy to wash off.

Extended information ① Soda, scientific name sodium carbonate, also known as soda ash and soda ash, is an important basic chemical raw material and the main product of soda ash industry. Usually white powder, easily decomposed at high temperature, easily soluble in water, and the aqueous solution is alkaline.

② Soda soda can be decomposed into sodium oxide and carbon dioxide at high temperature. Long-term exposure to the air can absorb moisture and carbon dioxide in the air, generate sodium bicarbonate and form lumps. Strong hygroscopicity, easy to form lumps, and does not decompose at high temperature.

Reference: Baidu Encyclopedia "Soda"