Sodium hypochlorite (NaClO) is a common bleaching agent, its bleaching effect mainly comes from its strong oxidation, in water in the form of HClO and ClO two forms, HClO is extremely unstable, easy to decompose O2. The new ecological oxygen has a strong oxidation capacity, which can destroy the organic pigment groups and make the colored matter fade. Therefore, it is used to bleach pulp in the paper industry and to bleach fabrics in the textile industry.
The bleaching principle of sodium hypochlorite is to oxidize dyes to colorless through its strong oxidation, so as to achieve bleaching effect. The solution is usually yellowish, has a chlorine-like odor, and is corrosive and irritating. When using, it is necessary to pay attention to standardized use and isolate the skin to avoid harm to the human body and the environment.
In the textile industry, sodium hypochlorite is used to improve the whiteness of fabrics and remove pigments, but it is also necessary to pay attention to its potential damage to fibers. For example, the use of sodium hypochlorite-oxygen bleaching process in linen-cotton blended fabrics may cause greater chemical damage to the fabric. The bleaching process of sodium hypochlorite is as follows: rolling sodium hypochlorite solution → stacking → water washing → dechlorination → water washing. The bleaching solution contains 3 ~ 5g/L of effective chlorine, and the pH value is adjusted to about 10 with caustic soda. The bleaching solution is dipped at room temperature, piled at room temperature for 30 ~ 60min, and then washed, dechlorinated, and washed to produce cloth. In the paper industry, sodium hypochlorite solution can also be used to improve the whiteness of pulp. For example, in grass paper making, the combination of sodium hypochlorite and hydrogen peroxide can improve the whiteness of pulp and reduce the lignin content. In addition, the use of sodium hypochlorite can also reduce the damage to the fiber by adding bleaching AIDS, such as complex enzyme additives can significantly improve the bleaching effect and reduce the fiber damage during the bleaching process.
However, the use of sodium hypochlorite also has some problems, such as the degradation of pulp fibers under high temperature conditions, and the oxidation of fluorescent whitening agents in the bleaching process, affecting the yellowing and whitening effect of fabrics. Therefore, controlling the use factors of sodium hypochlorite and optimizing bleaching process are the key to improve its application effect in textile and paper industry.
The bleaching effect of sodium hypochlorite is affected by many factors, including pH, concentration and temperature. In practical applications, the pH value of sodium hypochlorite solution is usually controlled between 9.5 and 10.5 to ensure its stability and bleaching effect. In addition, the concentration of sodium hypochlorite solution will also affect its bleaching effect, household bleach usually contains 5% sodium hypochlorite, while industrial bleach concentrations are higher.
15% sodium hypochlorite generator system
BLUEWAV is a manufacturer specializing in the manufacture of sodium hypochlorite machines, we have good experience in small plants and large plants, 12% sodium hypochlorite production up to 30 tons/day.
BLUEWAV is a company specializing in water treatment and disinfection technology. Since its establishment in 2001, BlueWAV has been committed to the research and development and production of water treatment and disinfection technology and bleaching. Our sodium hypochlorite products and equipment can achieve lower salt and power consumption for the same type. The system is equipped with a two-stage salt filtration process that requires only 89% salt purity; We will also provide you with local technical support; Our products are equipped with a three-stage hydrogen exhaust system to effectively ensure the safe discharge of hydrogen from NACLO equipment and ensure the safety of field operations; Easy to install, let you use faster to create revenue.
In conclusion, sodium hypochlorite plays an important role in bleaching applications in textile and paper mills, but it is necessary to optimize its effects and reduce potential damage to the fibers by precisely controlling the process conditions and using appropriate auxiliaries.