Does anyone know that industrial alkalis are used in those industries 15

The scientific name of caustic soda "sodium hydroxide NaOH" is a strong soluble alkali. Soluble in water, strongly alkaline, can provide Na+ ions. These properties make them widely used in various sectors such as soap making, textiles, printing and dyeing, bleaching, papermaking, petroleum refining, metallurgy and other chemical industries.

1. Soap industry:

Ordinary soap is a sodium salt of high-grade fatty acids, which is generally prepared by saponification of grease under the action of slightly excessive caustic soda.

Second, in the printing and dyeing and textile industries, a large amount of lye should be used to remove the grease on cotton yarn and wool. Caustic soda is also required for the production of man-made fibers.

For example, viscose fiber is first impregnated with 18 20 caustic soda solution to make it alkali cellulose, and then the alkali cellulose is dried, crushed, and then disulfided.

Finally, the sulfonate is dissolved with a dilute lye solution to obtain a viscous solution. After filtration and vacuuming (bubble removal), it can be used for wire drawing.

3. Caustic soda should also be used for refining petroleum:

In order to remove the gum in the petroleum fraction, concentrated sulfuric acid is generally added to the petroleum fraction to make the gum become an acid residue and precipitate. After pickling, the petroleum also contains acidic impurities such as phenols and naphthenic acids and excess sulfuric acid, which must be washed with caustic soda solution and then washed with water to obtain refined petroleum products.

Fourth, in the paper industry, first of all, it is necessary to use chemical methods to process the raw materials containing cellulose (such as wood) and chemical agents to cook to make pulp.

The so-called alkaline pulping method is to use caustic soda solution as a cooking liquid to remove lignin, carbohydrates and resins in raw materials, and neutralize the organic acids in them, so as to separate cellulose.

5. In the metallurgical industry, it is often necessary to convert the active ingredients in the ore into soluble sodium salts in order to remove the insoluble impurities, so it is often necessary to add soda ash (it is also a flux), and sometimes caustic soda is also used.

For example, soda ash and caustic soda are used in the smelting of aluminum, in the preparation of cryolite and in the treatment of bauxite. For example, when smelting tungsten, the concentrate and soda ash are first roasted into soluble sodium tungstate, and then powdered tungsten is prepared through acid precipitation, dehydration, reduction and other processes.

6. In the chemical industry, caustic soda is used to make metal sodium and electrolyzed water.

Caustic soda is used in the production of many inorganic salts, especially in the preparation of some sodium salts (such as borax, sodium silicate, sodium phosphate, sodium dichromate, sodium sulfite, etc.).

Caustic soda is also used in synthetic dyes, pharmaceuticals and organic intermediates.

Papermaking, printing and dyeing, and a series of other chemical processes that need to involve redox reactions, probably so much!

Industrial alkalis are available in high and low grades.

It is generally used in the pharmaceutical industry.

According to the different production products of each unit, for example, some electronics factories are also used.

It is used in man-made fiber, papermaking, printing and dyeing, soap making, dyes, textile, medicine, metal products and other industries. It is also used in pesticides, batteries, tanning, electroplating and other industries.

The chlor-alkali industry refers to the saturation of electrolysis in industrySodium chloride solutionmethod to produceSodium hydroxide（naoh）、Chlorine(Cl) and hydrogen (H), and use them as raw materials to produce a series of chemical products, known as the chlor-alkali industry

The chlor-alkali industry is one of the most basic chemical industries, and its products are widely used in addition to the chemical industry itselfLight industry, textile industry, metallurgical industry,Petrochemical industryand utilities.

China's chlor-alkali industry mainly adopts two production processes: diaphragm method and ion membrane exchange method. The main products of the chlor-alkali industry include caustic soda and polyvinyl chloride.

PVC), chlorine, hydrogen, etc. Chlor-alkali products are mainly used in the manufacture of organic chemicals, paper, soap, glass, chemical fibers, plastics and other fields.

In recent years, China's chlor-alkali industry has developed rapidly, the original chlor-alkali enterprises have expanded their production capacity, some new enterprises have also been put into operation, the production capacity has increased rapidly, and the chlor-alkali industry has shown an accelerated trend of large-scale and high-tech development. While China's chlor-alkali industry has rapidly increased its production capacity, its technology has also made great progress, with the increase of large-scale devices and the improvement of the technical level of devices, and China's chlor-alkali industry has shown a large-scale and high-tech development trend.

The chlor-alkali industry is the production of chlorine and alkali (sodium hydroxide), which is the method of industrial production of chlorine, which is prepared by the method of electrolysis of saturated brine. The equation is 2NaCl + 2H2O== (energized condition) 2NaOH + H2 + Cl2

Top 10 soda ash production enterprises in China:1. China Salt Inner Mongolia Chemical Co., Ltd. ****.

2. Shandong Haihua Group ****.

3. Tangshan Sanyou Chemical Co., Ltd. ****.

4. Inner Mongolia Yuanxing Energy Co., Ltd. ****.

5. Sichuan Hebang Biotechnology Co., Ltd. ****.

6. Shandong Jinjing Technology Co., Ltd. ****.

7. Hubei Shuanghuan Science and Technology Co., Ltd. ****.

8. Tianjin Bohua Yongli Chemical Co., Ltd. ****.

9. Jiangsu Salt Industry Group Co., Ltd.

10. Jiangsu Huachang Chemical Co., Ltd. ****.

There are many production processes of soda ash, which can be mainly divided into trona method and synthetic alkali method, of which the synthetic alkali method includes ammonia-alkali method and combined alkali method. The raw material of the trona method is trona ore, which is prepared by a series of processes such as dissolving, filtration, evaporation, and crystallization of trona minerals;

The ammonia-alkali method, also known as the Solvay alkali method, is one of the mainstream alkali production methods in China, and the main raw materials include salt, limestone, coke and ammonia, etc., which are separated from the solution at room temperature and calcined by heating the chain to obtain soda ash; The main raw materials of the method are salt, ammonia and carbon dioxide, and on the basis of the Solvay method, the two major industries of soda ash and synthetic ammonia can produce soda ash and ammonium chloride products.

Summary. Industrial soda ash can also be divided into three categories, each with its own unique application:

1. The first is heavy sodium carbonate for industrial use, which is mainly suitable for the manufacture of developing glass shells, float glass, optical glass, etc.;

2. The second is industrial carbon soda ash produced by general industrial salt and trona as raw materials, including light sodium carbonate and heavy sodium carbonate;

3. The third is industrial soda ash produced by the alkali method with sodium sulfate brine salt as raw material, including light sodium carbonate and heavy sodium carbonate.

What are the uses of industrial soda ash.

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Uses of industrial soda ash: 1. Industrial soda ash is widely used in light industry and daily chemicals, building materials, chemical industry, food industry, metallurgy, textile, petroleum, national defense, medicine and other fields, as raw materials for the manufacture of other chemicals, cleaning agents, detergents, and also used in the field of photography and analysis.

2.Industrial soda ash is followed by metallurgy, textile, petroleum, national defense, medicine and other industries.

3. In industrial soda ash, mainly light industry, building materials, and chemical industry, accounting for about 2 3;This is followed by metallurgy, textile, petroleum, national defense, medicine and other industries. The glass industry is the consumer sector of soda ash, consuming tons of soda ash per ton of glass.

Industrial soda ash can also be divided into three categories, each of which has its own unique application objects: 1. The first is heavy sodium carbonate for industrial use, which is mainly suitable for the manufacture of developing glass shells, float glass, optical glass, etc.; 2. The second is industrial carbon soda ash produced by general industrial salt and trona as raw materials, including light sodium carbonate and heavy sodium carbonate; 3. The third is industrial soda ash produced by the alkali method with sodium sulfate brine salt as raw material, including light sodium carbonate and heavy sodium carbonate.

How to use industrial soda ash to color bamboo, and how to deal with the resurgence and fading in the future?

Put the bamboo in caustic soda or sulfuric acid solution and boil for 3 5 minutes, and then put in alkaline dyes (such as "golden lumps", "peacock green") and boil for 30 minutes, and the color will not fade.

After using industrial alkali, there will be a resurgence of moisture in the sun.

That is, after a day of resting, the surface of the bamboo will be damp.

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Put the bamboo in caustic soda or sulfuric acid solution and boil for 3 5 minutes, and then put in alkaline dyes (such as "golden lumps", "peacock green") and boil for 30 minutes, and the color will not fade.