Conventional printing and dyeing requires alkali and oxygen bleaching of cotton fabrics with strong alkali and hydrogen peroxide to obtain the whiteness and hair effect required for subsequent dyeing. However, if the residual hydrogen peroxide on the fabric is not cleaned after oxygen bleaching, it will follow. The color yield of dyeing is reduced, which has a serious negative impact on production. Even if there is residual hydrogen peroxide at a concentration of 5 mg/L in the dyeing bath, the final color will be lighter than 5-10%, resulting in unstable production quality (batch difference) and waste of dye. Therefore, effective oxygen removal after oxygen bleaching to ensure the subsequent dyeing quality is an important part of the quality control of printing and dyeing plants.
In response to this problem, Novozymes has introduced the highly efficient Terminox Supreme Catalase, which can help the dyeing plant to complete the deoxidation process with high quality, simplify the operation steps and ensure the safety of production.
Deoxygenation after immersion in oxygen bleaching is a standard step in printing and dyeing plants, but each plant has a different process for oxygen removal. More plants use a large amount of water to achieve the purpose of deoxidation, many steps, low efficiency and waste of water resources, the pressure of energy saving and emission reduction is huge. There are also factories that use reducing agents to remove oxygen, but if the reducing agent is not cleaned, it will also affect the color yield of the dye, reduce production efficiency, and consume energy and water.
Conventional printing and dyeing requires alkali and oxygen bleaching of cotton fabrics with strong alkali and hydrogen peroxide to obtain the whiteness and hair effect required for subsequent dyeing. However, if the residual hydrogen peroxide on the fabric is not cleaned after oxygen bleaching, it will follow. The color yield of dyeing is reduced, which has a serious negative impact on production. Even if there is residual hydrogen peroxide at a concentration of 5 mg/L in the dyeing bath, the final color will be lighter than 5-10%, resulting in unstable production quality (batch difference) and waste of dye. Therefore, effective oxygen removal after oxygen bleaching to ensure the subsequent dyeing quality is an important part of the quality control of printing and dyeing plants.
In response to this problem, Novozymes has introduced the highly efficient Terminox Supreme Catalase, which can help the dyeing plant to complete the deoxidation process with high quality, simplify the operation steps and ensure the safety of production.
Deoxygenation after immersion in oxygen bleaching is a standard step in printing and dyeing plants, but each plant has a different process for oxygen removal. More plants use a large amount of water to achieve the purpose of deoxidation, many steps, low efficiency and waste of water resources, the pressure of energy saving and emission reduction is huge. There are also factories that use reducing agents to remove oxygen, but if the reducing agent is not cleaned, it will also affect the color yield of the dye, reduce production efficiency, and consume energy and water. 
In contrast, the use of Terminox Supreme hydrogen peroxide to remove oxygen after oxygen bleaching, in addition to ensuring oxygen removal quality, has great advantages in production efficiency and energy saving and emission reduction benefits.
Figure 2: Catalase deoxygenation process
The main role of Terminox Supreme catalase is to catalyze the decomposition of H2O2 into H2O and O2, thereby avoiding the effect of residual reactive oxygen species on dye coloration.
2H2O2 → O2 + 2H2O
Terminox Supreme does not have any negative effect on dye coloration, so no additional cleaning process is required after deoxidation, and the dyeing can be carried out in the same bath after the oxygen removal step is completed, saving water and time and simplifying the factory. Process. Moreover, the process of decomposing hydrogen peroxide does not require high temperature, so steam heating is not required, thereby saving energy, reducing carbon dioxide emissions, and helping the printing and dyeing plant achieve the goal of energy saving and emission reduction.
Through the calculation of the product life cycle, we know that every 1 kg of Terminox Supreme catalase can be used during the pre-printing process:
- 1800 Kg steam
- 33 Kwh electricity
- 20 m3 water In the printing and dyeing industry with energy saving and environmental protection pressure, these can bring huge energy saving and emission reduction benefits to the printing and dyeing factory and help the factory to achieve the goal of reducing energy saving.
Moreover, Terminox Supreme catalase has a very high activity, its temperature range and pH range are very wide, and can be used safely at temperatures below 70 ° C and pH 4-11, simplifying the operation of factory workers. The safety and reproducibility of the production process have been greatly improved.
In summary, the use of Terminox Supreme catalase for oxygen removal can bring significant economic benefits to the printing and dyeing industry.
In contrast, the use of Terminox Supreme hydrogen peroxide to remove oxygen after oxygen bleaching, in addition to ensuring oxygen removal quality, has great advantages in production efficiency and energy saving and emission reduction benefits.
Figure 2: Catalase deoxygenation process
The main role of Terminox Supreme catalase is to catalyze the decomposition of H2O2 into H2O and O2, thereby avoiding the effect of residual reactive oxygen species on dye coloration.
2H2O2 → O2 + 2H2O
Terminox Supreme does not have any negative effect on dye coloration, so no additional cleaning process is required after deoxidation, and the dyeing can be carried out in the same bath after the oxygen removal step is completed, saving water and time and simplifying the factory. Process. Moreover, the process of decomposing hydrogen peroxide does not require high temperature, so steam heating is not required, thereby saving energy, reducing carbon dioxide emissions, and helping the printing and dyeing plant achieve the goal of energy saving and emission reduction.
Through the calculation of the product life cycle, we know that every 1 kg of Terminox Supreme catalase can be used during the pre-printing process:
- 1800 Kg steam
- 33 Kwh electricity
- 20 m3 water In the printing and dyeing industry with energy saving and environmental protection pressure, these can bring huge energy saving and emission reduction benefits to the printing and dyeing factory and help the factory to achieve the goal of reducing energy saving.
Moreover, Terminox Supreme catalase has a very high activity, its temperature range and pH range are very wide, and can be used safely at temperatures below 70 ° C and pH 4-11, simplifying the operation of factory workers. The safety and reproducibility of the production process have been greatly improved.
In summary, the use of Terminox Supreme catalase for oxygen removal can bring significant economic benefits to the printing and dyeing industry.
Hengshi Diamond Tools CO.,LTD , https://www.ryomaltools.com