What is the chemical equation for the production of soda ash in Hou Debang and what is the method ca

The combined alkali production method, also known as the Hou's alkali production method, is used to produce soda ash (Na2CO3) in industry, which was invented by Hou Debang in 1943 and is widely used in the world. The combined alkali production method is based on the ammonia-alkali method, and the reaction differences are: sodium chloride is added to the waste liquid of the ammonia-alkali method, and carbon dioxide and ammonia are introduced into the waste liquid at 30 40 °C, so that the solution reaches a saturated state, and then cooled to below 10 °C, because the solubility of ammonium chloride at 30 °C is greater than that of sodium chloride, and the solubility is smaller than that of sodium chloride at 10 °C, as well as the same ion effect, the ammonium chloride is precipitated from the mother liquor, and the mother liquor can be used as the raw material for the next alkali production, Ammonium chloride can also be used as a fertilizer.

Evaporation to dry to obtain sodium carbonate. The main reaction equation is: NH3 + CO2 + H2O + NaCl = NH4Cl + NaHCO3 2NAHC3 - heating NA2CO3 + CO2 + H2O The "union" in the so-called "joint alkali production method" refers to the combination of the synthetic ammonia industry and the alkali production industry, using the by-product CO2 during the production of ammonia, eliminating the use of limestone decomposition to produce, simplifying the production equipment.

In addition, the combined alkali production method also avoids the production of calcium chloride, a by-product of little use in the ammonia-alkali process, and uses ammonium chloride, which can be used as a fertilizer. There are also shortcomings in the combined alkali production method. Compared with the ammonia-alkali method, it uses a larger amount of ammonia and is not suitable in some cases.

1. Introduce a sufficient amount of carbon dioxide into concentrated ammonia water to generate ammonium carbonate;

2. Add fine salt and stir thoroughly;

3. Soda ash prepared by heating the precipitated sodium bicarbonate.

The equation is:1 nh3+h2o+co2=nh4hco32.

nh4hco3+nacl=nh4cl+nahco3↓3.2nahco3 na2co3 co2 h2o is called Hou's alkali method, I hope it can help you.

The equation of the Houdebang alkali method is: NaCl+H2O+NH3+CO2=NaHCO3 NH4Cl.

In the theory of acid-base ionization, alkali refers to the compound that ionizes anions in aqueous solution, all of which are OH-; In acid-base proton theory, a base refers to a compound that can accept protons; In acid-base electron theory, a base refers to an electron donor.

The joint alkali method is a process of producing soda ash from sodium chloride, carbon dioxide, ammonia and water as raw materials, and the by-product of chlorine and ammonium slag. Soda ash is a basic chemical raw material, with a large amount of use, and occupies an important position in the national economy. Ammonium chloride is mainly used as agricultural fertilizer, but its quality affects the development of the soda ash industry.

"Combined alkali method" is also known as "Hou's alkali method".

The joint uses salt, ammonia and carbon dioxide from the by-products of synthetic ammonia industry as raw materials, and produces soda ash and ammonium chloride at the same time, referred to as "joint alkali" or "joint alkali".

"Combined alkali method" is also known as "Hou's alkali method". In China's combined alkali production, the combined alkali production process of one carbonization, two ammonia absorption, one salt addition and ice machine cooling is generally adopted.

a. The reactants of the reaction that occurs in the sedimentation tank are sodium chloride, ammonia, carbon dioxide and water, so it contains sodium, chlorine, nitrogen, hydrogen, etc

carbon and oxygen are six elements, so a is correct;

b. The solute contained in the filtered "mother liquor includes sodium bicarbonate, ammonium chloride, and may also contain excessive sodium chloride, so B is wrong;

c. Sodium bicarbonate decomposes to produce sodium carbonate, water, and carbon dioxide, so X is carbon dioxide, so C is wrong;

d. The aqueous solution of ammonia is alkaline, which can better absorb carbon dioxide, make the reactant concentration large and the reaction speed is fast, so D is correct.

Therefore, AD is chosen

A, the elements are, na, cl, n, h, c, o, six elements.

d, better absorption of carbon dioxide, is the increase in the concentration of reactants, the reaction speed is fast

Dessa's great era of Asadesa.

Well, it feels like it should be C or D. It feels like C should be more accurate. This is an offer only.

1. Introduce a sufficient amount of carbon dioxide into concentrated ammonia water to generate ammonium carbonate;

2. Add fine salt and stir thoroughly;

3. Soda ash prepared by heating the precipitated sodium bicarbonate.

The equation is:1

nh3+h2o+co2=nh4hco3

NH4HCO3+NACL=NH4Cl+NAHC3 2NAHC3 NA2CO3 CO2 H2O is called Hou's alkali method.

Combined alkali production method.

Hou's alkali method) NH3 + CO2 + H20 + NaCl = NH4Cl + NaHCO3

nahco3

Because the solubility is small, it is a precipitation, which allows the reaction to proceed).

2nahco3=na2co3+co2↑+h2o

="The main point is to add table salt solids to the filtrate of the Solvay alkali method, and at 30

Ammonia and carbon dioxide are introduced into the filtrate to saturate it, and then cooled to below 10, according to.

Solubility ratio of NH4Cl at room temperature.

NaCl is larger, but at low temperatures it is larger.

Based on the principle of low solubility of NaCl, ammonium chloride (a chemical fertilizer) is crystallized, and its mother liquor can be reused as a raw material for alkali production in Solvay's alkali production process. Advantages of this method: The advantages of the ammonia-alkali method are retained, its disadvantages are eliminated, and the utilization rate of salt is improved.

NH4Cl can be used as nitrogen fertilizer; It can be combined with the synthetic ammonia plant to make the raw gas of synthetic ammonia.

co into .

CO2, removed.

CaCO3 to CO2

This process.

(1) From the meaning of the title, NH3+CO2+H2O NH4HCO3 is characterized by "multiple variations", which conforms to the definition and characteristics of chemical reactions, and is a chemical reaction; NH4HCO3+NaCl NAHCo3 +NH4Cl is characterized by "two exchanges, constant valence", which conforms to the definition and characteristics of metathesis reaction, and is a metathesis reaction; ③2nahco3

Na2CO3+H2O+CO2 is characterized by "one becomes many", which conforms to the definition and characteristics of decomposition reaction, and is a chemical reaction The basic type of reaction that is missing is the displacement reaction Since soda ash is composed of metals and acid roots, it belongs to the salt group

2) The surface area of ground salt powder increases, accelerates the dissolution of salt, increases the contact area between salt and ammonium bicarbonate, and then accelerates the reaction rate

3) The solubility of NH4Cl was greatly affected by temperature and decreased significantly with the decrease of temperature, while the solubility of NaCl was not greatly affected by temperature, so a large number of NH4Cl crystals were precipitated after cooling, while NaCl remained in the solution

Therefore, the answer is: (1) displacement reaction; Salt

2) Increase the contact area between salt and water, accelerate the dissolution of salt, and then accelerate the reaction rate

3) The solubility of NH4Cl increased with the increase of temperature. NaCl solubility is not affected much by temperature

1 Carbon dioxide is introduced into the saturated salt water that has been ammoniated.

NH3 + H2O + CO2 + NaCl = NH4Cl + NaHCO3 (precipitation)2 Sodium bicarbonate is heated to obtain sodium carbonate.

2NaHCO3 NA2CO3+H2O+CO23 Sodium hydroxide is prepared by using sodium carbonate through lime water.

Na2CO3 Ca(OH)2=2NaOH+CaCO34 Calcium carbonate is cultivated to obtain the carbon dioxide cycle.

caco3=cao+co2

cao+h2o=ca(oh)2

5. Excessive salt is added to the mother liquor of the 5-step reaction, ammonium chloride crystallization is precipitated, and chemical fertilizer is used Mr. Hou Debang After thousands of tests, he successfully studied the combined alkali production method in 1943. This method combines the production of synthetic ammonia and soda ash, which improves the utilization rate of salt, shortens the production process, reduces environmental pollution, and reduces the cost of soda ash.

(1) Soda ash can be used to produce detergents, glass, papermaking, decontamination powder, printing and dyeing, etc.;

2) Sodium bicarbonate is heated and decomposed to produce sodium carbonate, carbon dioxide and water, and the chemical equation of the reaction is 2NaHCO3

Na2CO3 + CO2 + H2O, the reactant of this reaction is one, and the product is three, which belongs to the decomposition reaction;

3) From the above process, it can be seen that carbon dioxide can be recycled, and its advantages are to slow down the greenhouse effect and improve the utilization rate of raw materials;

4) Operation i is the operation of separating solids and liquids, and its name is filtration; The role of glass rods in filtration is drainage;

5) Sodium hydroxide, hydrogen and chlorine can be prepared by electrolysis of saturated brine, and the chemical equation of the reaction is 2NaCl+2H2O energized.

2naoh+cl2↑+h2↑；

Therefore, the answer is: (1) for the production of detergent;

2）2nahco3

na2co3+co2↑+h2o；Decompose;

3) carbon dioxide; improve the utilization rate of raw materials;

4) filtration; Drainage;

5) 2NaCl+2H2O energized.

2naoh+cl2↑+h2↑．

（1） h2 o 。(2) Heat the mixture.

3) The mass of sodium carbonate in 55g of industrial soda ash is;

The mass fraction of solute sodium chloride in the solution after the reaction is 20%A: The mass fraction of carbonic acid in industrial soda ash is. The mass fraction of solutes in the solution after the reaction is 20%.