CAS number：144-55-8
molecular formula：CHNaO3
molecular weight：84.01
EINECS number：205-633-8

English synonyms

Sodium bicarbonate, GR,≥99.8%;Sodium bicarbonate, AR,≥99.8%;Sodium bicarbonate standard solution;Natrium Bicarbonate;SODIUM BICARBONATE PWD;Sodium bicarbonate test solution(ChP);Sodium bicarbonate  Manufacturer;TSQN

Related categories

Microorganisms; light metals; analytical reagents; acidity regulators; inorganic salts; leavening agents (loose agents); wheat flour and starch modifiers; food additives; sodium; culture media; carbonates; inorganic raw materials; biological buffer series

Introduction

Sodium bicarbonate, also known as acid sodium carbonate, sodium bicarbonate, baking soda, heavy alkali, and baking soda, is an acid salt generated after the neutralization of a strong base and a weak acid. When dissolved in water, it is weakly alkaline and can be quickly absorbed after oral administration. Neutralizes gastric acid, its antacid effect is weak and short-lived. In addition, it also has the function of alkalizing liquid. It is suitable for hyperacidity, indigestion and alkalized urine; intravenous administration is used for acidosis; external ear drops are used to soften the eyes; 2% solution for sitz bath is used for fungal vaginitis. Clinically, it is mainly used in veterinary medicine to treat gastrointestinal catarrhal inflammation, sepsis, severe diarrhea, large-area burns, neutralize gastric acid and alkalize urine. Spraying sodium bicarbonate in the greenhouse can prevent diseases and increase production. . For many diseases, such as cucumber powdery mildew, anthracnose, tomato leaf mold, etc., the pathogenic fungi are difficult to survive in alkaline conditions. Dissolving 500 times baking soda is very effective in preventing and treating the above diseases. In addition, carbon dioxide is the raw material for photosynthesis. Because the greenhouse is airtight, carbon dioxide is often insufficient. Spraying baking soda can replenish carbon dioxide after decomposition. It can be sprayed every 3-4 days during the growth period of vegetables; adding an appropriate amount of sodium bicarbonate to livestock and poultry feed can effectively improve the digestibility of livestock and poultry feed, increase the egg production rate and eggshell strength of laying hens, Accelerate the utilization of nutrients and the excretion of harmful substances, and increase the rate of weight gain of livestock and poultry; it can keep the resistance and immunity of livestock and poultry at their best, improve the anti-stress ability of livestock and poultry, and play a vital role in preventing livestock and poultry. disease, ensuring its healthy growth has a positive effect.

Chemical properties

●  White powder or opaque monoclinic fine crystals. Odorless, salty taste. Solubility in water is less than sodium carbonate. The solid begins to gradually decompose above 50℃ to produce sodium carbonate, carbon dioxide and water, and completely decomposes at 270℃. ChemicalbookSodium bicarbonate is an acid salt formed after the neutralization of a strong base and a weak acid. It is weakly alkaline when dissolved in water. This property is often used as a leavening agent in food production. After sodium bicarbonate is used, sodium carbonate will remain. If used too much, the finished product will have an alkaline smell.

Use

●  Used as analytical reagents, also in inorganic synthesis and pharmaceutical industry

●  Used to treat acidemia

●  It is used as a fermentation agent in the food industry, a carbon dioxide generator in soda and cold drinks, and a preservative for butter. It can be directly used as raw material in pharmaceutical industry. It can also be used in film production, tanning, mineral processing, smelting, metal heat treatment, fiber, rubber and agricultural seed soaking, etc. It is also used as a wool detergent, foam fire extinguishing agent, bath agent, etc.

●  Alkaline agent: leavening agent. It is often formulated with ammonium bicarbonate as a leavening agent for biscuits and pastries. The amount added to wheat flour is 20g./kg. It can be used with citric acid, tartaric acid, etc. to prepare a foaming agent for solid refreshing drinks (generating CO2). Because it is a harmless weak alkaline agent, adding about 0.1% to 0.2% when washing vegetables can stabilize the green color. When used alone, it becomes strongly alkaline due to decomposition by heat. When used in bread, it will turn yellow and destroy the vitamins in wheat. It is best to use it in combination with acidic substances such as calcium hydrogen phosphate. It can also be used for blanching food and removing astringency. Because it can increase the pH value, it can improve the water holding capacity of protein, promote the softening of food tissue cells, and promote the dissolution of astringent ingredients. It has a mutton-removing effect on goat milk (dosage 10-20mg/kg).

●  As an acidity regulator and chemical leavening agent, our country stipulates that it can be used in various foods that require the addition of leavening agents, and should be used in appropriate amounts according to production needs.

●  Sodium bicarbonate can be used as a carbon-base balance medicine to treat acidemia. It is used in food, medicine, film, tanning, mineral processing, metallurgy, fiber, rubber and other industries. It can also be used as a detergent and fire extinguishing agent.

Production method

●  After the soda ash is dissolved and filtered to remove impurities using the gas-liquid phase method, the concentration is maintained at 23~24°Bé. The concentration of carbon dioxide produced in the lime kiln is maintained at 20% to 25%. After washing and purification, it is carbonized with hot alkali solution. The tower pressure is maintained at 0.2 to 0.25Mpa. When the material concentration reaches 13°Bé, the reaction ends. After cooling, crystallization and filtration, baking soda crystals are obtained, and then dried by air flow to obtain the finished product of sodium bicarbonate. The Na2CO3+CO2+H2O→2NaHCO3 gas solid phase method places sodium carbonate on the reaction bed (reaction tank), mixes it well with water, and blows carbon dioxide from the bottom. After carbonization in the primary reaction, it undergoes primary crushing to perform a secondary carbonization reaction. , and then dried and crushed to obtain the finished product of sodium bicarbonate. Its Na2CO3+CO2+H2O→2NaHCO3 waste alkali liquid recovery method is used in the soda ash production process. The furnace gas generated by the soda ash calciner still contains a large amount of alkali powder after cyclone separation. The furnace gas is recovered with hot alkali to dissolve the alkali powder in the alkali solution. During the circulating dissolution process, part of the alkali solution is sent to the ammonia evaporation tower to steam out the ammonia in the hot alkali solution to further concentrate the alkali solution and use it as a production plant. Soda lye raw material, ammonia, carbon dioxide and water mixture from the top of the ammonia evaporation tower enter the original furnace gas cooling tower. The mother liquor after separation and dehydration in baking soda production is used for hot alkali circulation to dissolve the alkali powder in the recovery furnace gas, forming a production process cycle. After the waste alkali liquid is recovered, it is carbonized, centrifuged and dried to obtain the finished sodium bicarbonate product. The Na2CO3+CO2+H2O→2NaHCO3 trona processing method uses trona as raw material. Due to the high impurity content, when preparing the alkali solution, it is necessary to strictly control the alkali temperature, concentration and mother liquor cycle times. The total salt content in the mother liquor should be greater than 240g/L. After alkalinization, the concentration of the alkali solution is sodium carbonate > 150g/L, sodium chloride < 50g/L, and sodium sulfate < 90g/L. The resulting alkali solution is filtered and slag removed, and then carbonized with carbon dioxide to form sodium bicarbonate crystals, which are washed and dehydrated. The washing liquid can be returned to alkali or discharged, and the crystallization is dried to obtain the finished product of sodium bicarbonate. Its Na2CO3+CO2+H2O→2NaHCO3

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