Sodium Bicarbonate CAS NO.497-19-8

Sodium Bicarbonate / Sodium Hydrogencarbonate CAS 144-55-8

Production methods:

1. The gas liquid phase method dissolve soda ash filter to remove impurities, keep the concentration at 23 ~ 24 ° Be.The carbon dioxide concentration in the limestone kiln was kept at 20% ~ 25%. After washing and purification, it was carbonized with lye and the column pressure was kept at 0.2 ~ 0.2 13 ° Be 5 Mpa, wait for material concentration, reaction at the end.The baking soda was crystallized by cooling, crystallization and filtration, and the sodium bicarbonate was obtained by airflow drying.The reaction equation is as follows:

2. Sodium bicarbonate was placed on the reaction bed (reaction tank) by gas-solid phase method and mixed with water. Carbon dioxide was blown in from the lower part.The reaction equation is as follows:

3. Waste lye recovery method in the process of soda production, the furnace gas produced by the soda calciner still contains more alkali powder after the cyclone separation.The gas of this furnace is recovered with hot alkali, so that the alkali powder is dissolved in the lye. During the cyclic dissolution process, part of the lye is sent to the steam ammonia tower, and the ammonia in the hot lye is steamed out to further concentrate the lye. As the lye raw material for the production of baking soda, the ammonia, carbon dioxide and water mixed gas from the top of the steam ammonia tower enters the original furnace gas cooling tower.The mother liquor separated and dehydrated in the production of baking soda is used for the circulation of hot lye to dissolve and recover the alkali powder in the furnace gas, forming the circulation of the production process.After recovery, carbonization, centrifugal separation and drying, sodium bicarbonate was prepared.The reaction equation is as follows:

4. Trona processing method USES trona as raw material. Due to the high content of impurities, the temperature, concentration and circulation of mother liquor should be strictly controlled during the preparation of alkali liquor
0 g/L.Alkali solution concentration sodium carbonate >15
0 g/L, sodium chloride < 5
0 g/L, sodium sulfate < 9
0 g/L, the resulting lye is filtered to remove slag, and then carbonized with carbon dioxide to form sodium bicarbonate crystals. After washing and dehydration, the lotion can be returned to alkalify or discharge. After crystallization and drying, sodium bicarbonate products are prepared.The reaction equation is as follows:Sodium carbonate reacts with carbon dioxide.

Feature:

      Used in food, medicine, movie studios, tanning, ore dressing, metallurgy, fibre, rubber and other industrial, also can make the detergent, fire extinguishing agent, used as starter cultures of food industry, soda, and cold drinks the happening of the carbon dioxide used as analytical reagent, also used in inorganic synthesis and pharmaceutical industry used in the treatment of acidemia is used as starter cultures of food industry, soda, and cold drinks in the carbon dioxide of agent, butter, the preservation of the agent.Can be directly used as raw materials for the pharmaceutical industry.It can also be used in film production, tanning, mineral processing, smelting, metal heat treatment, fiber, rubber and agricultural immersion.Also used as wool detergent, foam extinguishing agent, bath agent.Alkaline agent: leavening agent.Leavening agent is often prepared with ammonium bicarbonate for biscuits and cakes.