Sodium Chlorite Website
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Sodium Chlorite
Bleaching is required to whiten the color of materials by removing the color of a material. Therefore, the bleaching agent is necessary to be used in the bleaching process. Sodium chlorite, one of the bleaching agents, is still used for the bleaching process in the textile and paper industry due to chlorine dioxide generation which is responsible for the color removal. Odor control in the aquatic environment is also able to be fulfilled by sodium chlorite. We provide sodium chlorite in different grades, quantities, and packaging for your market and industry solution.
Manufacturing Process
Sodium chlorite is obtained by the reduction of sodium chlorate using reducing agents such as sodium sulfite or sulfur dioxide. The intermediate from the reduction reaction is absorbed into aqueous sodium hydroxide and further converted into sodium chlorite.
Sodium chlorate and sodium chloride are mixed to generate chlorine dioxide. In this step, the solution of the mixture is acidified using concentrated sulphuric acid and further agitate and dilute.
The gas generated from the agitation process is separated, which the chlorine dioxide is absorbed into water chilled tower and the chlorine gas is passed through separation towers.
The chlorine dioxide recovered from the separation process is pumped and cooled and reacts with caustic soda to form sodium chloride and sodium chlorate. To minimize sodium chlorate’s existence, a reducing agent is introduced to the reaction.
At the final step, the solution from the reduction reaction is pumped through a fractional crystallization tower to purify the sodium chlorite by using the solubility differences approach between the chlorite and other related salts and further evaporated.
Applications
Pulp and Paper
Sodium chlorite acts in a pulp bleaching process.
Textile
Sodium chlorite is used in the pulp and paper industry as a bleaching agent.
Water Treatment
Sodium chlorite in water treatment is used as a disinfectant to remove excess microorganisms that are not needed in the aquatic environment.