Sodium Hypochloride

Description

What is bleach?

Yellow liquid, used as a whitener, is commonly known as Whitex. This chemical substance is also known by names such as Antiformin, Sodium hypochlorite, Sodium oxychloride, liquid chlorine, liquid whitener, and hypochlorite. Bleach is an unstable solution and may lose its properties when exposed to heat and light. For this reason, this substance is kept in opaque containers and in a covered manner. This unstable solution is actually a solution of hypochlorous acid which can have different concentrations depending on its various uses. Bleach or WhiteX is a toxic substance that produces free chlorine. This has led to the disinfectant and cleaning properties of this solution.

What are the uses of bleach?

In addition to household uses as a whitener, it is also widely used for water purification. It can eliminate bacteria, viruses, and unpleasant odors present in water. Chlorination is one of the most common methods for purifying drinking water which comes from Calcium hypochlorite and sodium hypochlorite.

This substance has major applications including agriculture, chemical industries, paint and lime industries, food industries, glass industries, paper industries, pharmaceutical industries, waste disposal industries etc. In the textile industry, this substance can be used to whiten textiles. Adding this substance to industrial wastewater reduces existing odors.

Hypochlorite neutralizes hydrogen sulfide gas (SH) and ammonia (NH3). This substance is also used for detoxifying cyanide baths in metal industries. It can be used to prevent algae and fungi growth in cooling towers.

Cleaning and disinfecting surfaces in homes are mostly done with the help of Whitex. In dentistry, this compound is used for root canal irrigation (the effects on teeth will vary depending on usage time, temperature and concentration).

Production method of bleach?

1- Production of bleach by injecting chlorine gas into caustic soda: Bleach is produced by injecting chlorine gas into caustic soda; all tanks and pipes must be made of PVC because metal tanks and pipes corrode when exposed to chlorine gas.
NaOH+Cl—>NaClO+NaCl+H2o.
The caustic soda is poured into the tank and chlorine gas is introduced from below. The combination ratio of chlorine gas with caustic soda should be high so that after combining with chlorine gas at the end of the tank it reaches the surface and gets absorbed. Therefore, in this reaction if less chlorine gas exits from the surface of the tank then the production reaction of bleach will be better conducted. The temperature for this reaction should not exceed 42 degrees Celsius.
2- Production of bleach by electrolyzing NaCl solution: In this method electrolysis of sodium chloride solution is used to produce bleach. Electrolytic cells are used in cases where high flow rates and neutral solutions are required.