Sodium hydroxide, also known as caustic soda, the chemical formula is NaOH, is a highly corrosive strong base, usually white flake or particles, can be mixed with water to form an alkaline solution, the other can also be dissolved in methanol and ethanol.This alkaline material is deliquescent and absorbs water vapour from the air as well as acidic gases such as carbon dioxide.
Sodium hydroxide is one of the commonly used chemicals.It is widely used as a necessity in many industrial processes: it is often used in the manufacture of wood pulp paper, textiles, soaps and other detergents, etc. It is also used in household alkaline drainage supplies.In 2004, the world produced a total of 60 million tons of sodium hydroxide, out of a total consumption of 51 million tons.
1. Chemical industry
The properties of sodium hydroxide determine that this product is an indispensable and important substance in a large number of chemical reactions.Sodium hydroxide is one of the important raw materials for the production of polycarbonate, super absorbent polymer, zeolite, epoxy resin, sodium phosphate, sodium sulfite and a large amount of sodium salt.
2. Pulp and paper
Sodium hydroxide plays an important role in paper industry.Because of its alkaline nature, it is used in the process of cooking and bleaching paper.
3. Food industry
Sodium hydroxide can be widely used in the following production processes: container cleaning process;The processing of starch;Preparation of carboxymethyl cellulose;Sodium glutamate manufacturing process.
4. Water treatment
Sodium hydroxide is widely used in water treatment.In sewage treatment plants, sodium hydroxide can be neutralized to reduce the hardness of water.In the industrial field, is the regeneration agent of ion exchange resin regeneration.
Sodium hydroxide is strongly alkaline and has a relatively high solubility in water.Because caustic soda is liquid, it is easy to measure dosage and is used conveniently in various fields of water treatment.
Sodium hydroxide is currently used in water treatment on the following topics: eliminating the hardness of water;Adjust the pH of water;Neutralize waste water;Regeneration of ion exchange resin;Removal of heavy metal ions from water by precipitation.
5. Artificial fibers and textiles
In the textile industry, sodium hydroxide is used for the final processing and dyeing of fibers.Main application: mercerizing process for making fiber.
6. Metallurgical
Sodium hydroxide is used to treat bauxite, which contains alumina, in which the aluminum metal is found.Bauxite is the second most used metal in the world because of technological advances.Sodium hydroxide is also used in the production of zinc alloys and zinc ingots.
7. Soap and wash
Sodium hydroxide has been used for traditional household purposes, and soaps, soaps and other cleaning products still account for about 15 percent of the demand for caustic soda today.Main USES: soap: making soap is the oldest and most widely used form of caustic soda, in which caustic soda is used to neutralize fatty acids.Detergent: sodium hydroxide is used in the production of a variety of detergents, and even today's laundry detergent is made from a large amount of caustic soda, which is used to neutralize excess fuming sulfuric acid after the sulfurization reaction.
Post time: Dec-26-2019