1, chemical experiment

It can be used to do chemical experiments. Besides being used as a reagent, it can also be used as an alkaline desiccant because it has strong water absorption and deliquescence.

2. Chemical industry

The most used sector of sodium hydroxide is chemical manufacturing, followed by papermaking, aluminum smelting, tungsten smelting, man-made fiber, man-made fiber and soap manufacturing.

3. Production of detergent

1. soap

Making soap is the oldest and most extensive use of caustic soda.

② Detergent

Sodium hydroxide is used to produce various detergents.

4, papermaking

Sodium hydroxide plays an important role in the paper industry. Because of its alkalinity, it is used in the cooking and bleaching process of paper making.

5. Refine oil

After washing with sulfuric acid, petroleum products still contain some acidic substances, so they must be washed with sodium hydroxide solution and then washed with water to get refined products.

6. Food industry

Sodium hydroxide can be widely used in the following production processes:

Cleaning process of container. Processing of starch. Preparation technology of carboxymethyl cellulose. Production technology of sodium glutamate.

7. Water treatment

Sodium hydroxide is widely used in water treatment. In the sewage treatment plant, sodium hydroxide can reduce the hardness of water through neutralization reaction. In the industrial field, it is a regenerant for ion exchange resin regeneration. Sodium hydroxide is strongly alkaline and has relatively high solubility in water. Because the solubility of sodium hydroxide in water is relatively high, it is easy to measure the dosage and can be conveniently applied to various fields of water treatment.

8, metallurgy:

Sodium hydroxide is used to treat bauxite, which contains alumina and is the raw material for aluminum production. Alumina can be purified from concentrate with sodium hydroxide.

Second, the harm:

1, health hazard

It is strongly irritating and corrosive. Dust or smoke can irritate eyes and respiratory tract, corrode nasal septum, and direct contact between skin and eyes can cause burns. Mistaken intake can lead to digestive tract burns, mucosal erosion, bleeding and shock. ?

2. Toxicological data and environmental behavior

(1), hazard characteristics

This product will not burn, and will release a lot of heat when it meets water and steam, forming a corrosive solution. Neutralize with acid and release heat. It is very corrosive.

② products of combustion (decomposition)

May produce harmful toxic smoke.

Extended data

Precautions:

Protective articles should be worn when exposed to caustic soda in large quantities, and work clothes or working caps should be made of cotton cloth or appropriate synthetic materials. Operators must wear work clothes, masks, protective glasses, rubber gloves, rubber aprons, long rubber boots and other labor protection articles when working.

When handling, handle with care to prevent the packaging and containers from being damaged. Equipped with leakage emergency treatment equipment. Empty containers may leave harmful substances behind. When diluting or preparing the solution, alkali should be added to the water to avoid boiling and splashing.

Wear protective glasses and gloves when dealing with the leakage, sweep it clean, slowly pour a lot of water, rinse the ground with water, and put the diluted sewage into the wastewater system.

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