What is the reaction principle chemical equation of ammonia alkali method to soda ash?

CaCO3 + 2NaCl = High temperature = CaCl2 + Na2CO3

The reaction steps are:

NaCl+NH3+CO2+H2O===NaHCO3+NH4Cl, CaCO3=High Temperature=CaO+CO2, 2NH4Cl+CaO====2NH3 +CaCl2+H2O

2NaHCO3 = High temperature = Na2CO3 + CO2 + H2O

The CO2 and NH3 produced by the reaction can be reused as raw materials.

The total reaction formula is: CaCO3 + 2NaCl = high temperature = CaCl2 + Na2CO3 (Note that it is not a metathesis reaction.

Later Hou Debang.

The method is improved, that is, the Hou's alkali method.

Reaction principle of ammonia-alkali method to soda ash:

Soda ash is produced from salt (sodium chloride), limestone (calcined to produce quicklime and carbon dioxide), and ammonia. Ammonia gas is first introduced into saturated salt water to form ammonia brine, and then carbon dioxide is introduced to form sodium bicarbonate precipitate and ammonium chloride solution with less solubility. The NaHCO3 microcrystals obtained by filtration and washing are then heated and calcined to obtain soda ash products.

Soda ash, scientific name sodium carbonate, common name soda, stone alkali, washing alkali, chemical formula NA Co, belongs to the salt class, sodium carbonate containing ten crystal water is colorless crystals, crystal water is unstable, easy to weather, into white powder Na2CO3, is a strong electrolyte, has the universality and thermal stability of salt, is soluble in water, and its aqueous solution is alkaline.

The chemical reaction principle of ammonia-alkali method to produce soda ash is to react ammonia and carbon dioxide with sodium chloride and water to produce sodium bicarbonate, and then heat sodium bicarbonate to produce sodium carbonate; Ammonia dissolved in water is alkaline and absorbs carbon dioxide more easily than water; At a certain temperature, the solubility of ammonium bicarbonate is smaller than that of ammonium chloride, so ammonium bicarbonate can be precipitated from the solution first

Therefore, the answer is: NH3+CO2+H2O+NaCl NAHCo3+NH4Cl;

2nahco3

na2co3+co2↑+h2o．

The chemical reaction principle of ammonia-alkali method to produce soda ash is to react ammonia and carbon dioxide with sodium chloride saturated solution to generate sodium bicarbonate, and then heat sodium bicarbonate to produce sodium carbonate; Ammonia dissolved in water is alkaline and absorbs carbon dioxide more easily than water; At a certain temperature, the solubility of ammonium bicarbonate is smaller than that of ammonium chloride, so ammonium bicarbonate can be precipitated from the solution first Under the condition of heating, sodium bicarbonate decomposes to produce sodium carbonate, water and carbon dioxide The chemical principle of the reaction is: NH3 + CO2 + H2O + NaCl NAHC3 + NH4Cl; 2nahco3

na2co3+co2↑+h2o．

Therefore, the answer is: NH3+CO2+H2O+NaCl NAHCo3+NH4Cl; 2nahco3

na2co3+co2↑+h2o．

(1) The main component of the final soda ash is sodium carbonate, the chemical formula of sodium carbonate is Na2CO3, sodium carbonate is a compound composed of sodium ions and carbonate ions, which belongs to salt, and the solution of sodium carbonate is alkaline when dissolved in water;

Therefore, fill in: na2CO3; Salt; Alkali

2) Sodium bicarbonate is non-toxic and can react with dilute hydrochloric acid in gastric juice, so it can be used for excessive gastric acid;

Therefore, fill in: stomach acid

3) The chemical equation for the thermal decomposition of sodium bicarbonate is: 2NaHCO3

na2co3+h2o+co2↑．

Therefore, fill in: 2naHCO3

na2co3+h2o+co2↑．

Ammonia gas is introduced into saturated saturated brine to obtain sodium bicarbonate precipitation by introducing CO2.

NH3 + CO2 + H2O = NH4HCO3 uses sodium bicarbonate to have much smaller solubility than sodium chloride and ammonium chloride, and cannot be fully dissolved in high concentration of salt water and precipitated.

NH4HCO3 + NACl = NAHCO3 + NH4Cl The sodium bicarbonate crystal is then filtered out and heated to decompose it to give soda ash.

Ammonia participated in the reaction (NH3+CO2+H2O===NH4HCO3 NH4HCO3+NAC===NAH4CL 2NAHCO3===NA2CO3+CO2 +H2O).

Function: As an alkaline gas, it reacts with an acid (carbonic acid) to produce bicarbonate.