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Industrial application of sodium percarbonate

Views: 1     Author: Site Editor     Publish Time: 2024-04-06      Origin: Site

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introduction

 

The industrial importance of sodium percarbonate is mainly reflected in the following aspects:

 

Environmentally friendly: As a green chemical, the oxygen and sodium carbonate produced by the decomposition of sodium percarbonate during use are harmless to the environment, making it an ideal substitute for many traditional chemicals and helping to reduce the negative impact of industrial production on the environment.

 

High efficiency: The strong oxidation performance of sodium percarbonate makes it excellent in removing stains, sterilizing and disinfecting, especially in situations where traditional methods are difficult to treat. The high efficiency of sodium percarbonate is particularly prominent.

 

Safety: Compared with other strong oxidants, the use and treatment of sodium percarbonate are relatively safe, reducing safety risks in industrial applications.

 

Multifunctionality: Sodium percarbonate can not only be used as a bleaching agent and disinfectant, but also as an oxygen donor, cleaning agent, and other purposes, making it widely used in industrial fields.

 

Basic characteristics of sodium percarbonate

Chemical structure:

Sodium percarbonate is a compound formed by the combination of sodium carbonate (Na2CO3) and hydrogen peroxide (H2O2). It usually appears as a white granular or powdered solid, easily soluble in water.

 

Chemical properties:

 

Oxidativeness: Sodium percarbonate easily dissociates into sodium carbonate and hydrogen peroxide in water. Hydrogen peroxide has strong oxidizing properties and can kill bacteria and microorganisms, while also having a bleaching effect.

 

Alkalinity: An aqueous solution of sodium percarbonate is alkaline, with a pH value of approximately 10-11 for a 3% aqueous solution.

 

Heat sensitivity: Sodium percarbonate is prone to decomposition when exposed to heat in a dry state, producing sodium carbonate, water, and oxygen.

 

Preparation method

 

The preparation methods of sodium percarbonate mainly include two categories: dry method and wet method:

 

 

Dry method:

 

The sodium carbonate aqueous solution and hydrogen peroxide aqueous solution are spray on the sodium percarbonate crystal seeds in the flowing airflow, dried and allowed to grow.

Directly add hydrogen peroxide to Na2CO3 particles and perform the reaction.

 

Wet method:

 

The finished product is obtained by reacting, crystallizing, and drying an aqueous solution of hydrogen peroxide and sodium carbonate at a certain temperature in an intermittent or continuous crystallization reactor.

 

Wet process is a widely used production process at present, mainly including spray method, crystallization method and alcoholysis method.

 

Stability

 

The stability of sodium percarbonate is a key factor in its practical application. Stability is mainly affected by the following factors:

 

Environmental humidity and temperature: The stability of sodium percarbonate decreases with increasing temperature and is easily decomposed in humid environments.

 

Metal impurity content: The heavy metal ions in the raw materials can promote the decomposition of sodium percarbonate and reduce its stability.

 

The addition of stabilizers: By adding inorganic and organic substances to form chelates with metal ions, or by encapsulating sodium percarbonate particles with certain organic and inorganic compounds to isolate contact with humid air, the stability of sodium percarbonate can be improved.

 

Industrial cleaning and decontamination

 

Cleaning equipment and machinery

 

In industrial production, the cleaning and maintenance of equipment and machinery are key to ensuring production efficiency and product quality. The use of sodium percarbonate can improve cleaning efficiency, reduce equipment maintenance costs, and extend the service life of equipment.

 

Cleaning effect: The strong oxidizing property of sodium percarbonate can help decompose and remove oil, dust, and other organic deposits on the surface of equipment.

 

Safety: As the oxygen and sodium carbonate produced by the decomposition of sodium percarbonate are harmless to the environment, they will not cause corrosion or damage to the equipment during the cleaning process.

 

Environmental friendliness: Sodium percarbonate, as an environmentally friendly cleaning agent, reduces environmental pollution compared to traditional chemical cleaning agents.

 

Remove oil and stubborn stains

 

Sodium percarbonate has a wide range of applications in removing oil and stubborn stains, especially when dealing with surfaces that are difficult to clean, its effect is particularly significant.

 

Oil stain removal: Sodium percarbonate can effectively decompose fats and oils, and has a good cleaning effect on oil stains on mechanical equipment, cooking oil stains on kitchen equipment, and oil pollution in industrial production.

 

Stubborn stains: Sodium percarbonate also has a good removal effect on stubborn stains such as long-term accumulation of stains, burnt marks, ink marks, etc.

 

Sterilization and disinfection: In addition to its cleaning function, sodium percarbonate can also kill bacteria and microorganisms, providing additional disinfection protection for equipment and surfaces.

 

Usage

 

When using sodium carbonate for industrial cleaning, the following methods can be adopted:

 

Solution preparation: Mix an appropriate amount of sodium percarbonate with water and adjust the concentration according to the degree of stains.

 

Spray or Soak: Spray sodium bicarbonate solution onto equipment or surfaces that require cleaning, or soak equipment components in the solution.

 

Action time: Let the sodium carbonate solution act on the surface of the equipment for a certain period of time to fully decompose the stains.

 

Rinsing and drying: Rinse the treated surface with clean water to remove residual solution and stains, and then thoroughly dry.

 

matters needing attention

 

When using sodium carbonate for industrial cleaning, the following points should be noted:

 

Safety protection: Operators should wear appropriate protective equipment, such as gloves, protective goggles, etc., to prevent contact between the solution and the skin and eyes.

 

Concentration control: Adjust the concentration of sodium carbonate according to cleaning needs to avoid excessive concentration that may cause damage to certain sensitive materials.

 

Post treatment: After cleaning, it should be thoroughly rinsed and dried to prevent residues from affecting equipment performance.

 

Water treatment and environmental protection

 

Removing organic pollutants from water

 

One of the main functions of sodium percarbonate in water treatment is to remove organic pollutants. Organic pollutants, such as natural organic matter (NOM), pesticides, drug residues, etc., are common pollutants in water bodies that may pose a threat to human health and the ecological environment. Sodium percarbonate effectively decomposes these organic substances through oxidation reactions, converting them into harmless small molecules such as water and carbon dioxide.

 

 

Research case: For example, Fe (II) activated sodium percarbonate was used to reduce the pollution of natural organic matter ultrafiltration membranes in drinking water treatment, demonstrating good results. Fe (II)/SPC pretreatment can reduce membrane fouling, improve membrane filtration performance, and effectively remove pollutants.

 

Mechanism: In some studies, activated sodium percarbonate from natural pyrite has been used to remove tetracycline from groundwater, exhibiting excellent catalytic activity and stability. This process is mainly achieved through the oxidation of hydroxyl radicals and superoxide anions.

 

Environmental characteristics and sustainable development

 

The environmental characteristics of sodium percarbonate are that its decomposition products are harmless to the environment and do not produce harmful by-products during use. This makes sodium percarbonate an ideal green chemical that helps achieve sustainable

 

development in water treatment processes.

 

Environmental advantages: The use of sodium percarbonate reduces reliance on traditional chemical treatment agents, such as chloride disinfectants, which may produce harmful by-products such as trihalomethanes.

 

Sustainable development: During the production and use of sodium percarbonate, energy consumption is relatively low, and its decomposition products are environmentally friendly, which helps to reduce the carbon footprint in water treatment and promote the sustainable utilization of water resources.

 

Food processing and bleaching

 

Food bleaching and disinfection

 

Sodium percarbonate, as a strong oxidant, can effectively decompose organic pigments and kill microorganisms in food, thereby achieving the purpose of bleaching and disinfection.

 

Bleaching effect: Sodium percarbonate can be used in the bleaching process of food, such as surface treatment of flour, fruits, and vegetables, to remove unexpected colors and spots,

 

making the product appearance whiter and more attractive. For example, in flour processing, sodium percarbonate can improve the whiteness of flour and enhance the appearance quality of the final product.

 

Disinfection effect: During food processing, sodium percarbonate can kill bacteria, fungi, and other microorganisms, reduce the risk of food spoilage and spoilage, and thus extend the shelf life of food. This is particularly important for perishable foods such as meat, poultry eggs, and seafood.

 

Food safety and quality control

 

In terms of food safety and quality control, the use of sodium percarbonate needs to strictly comply with relevant hygiene standards and regulations to ensure the safety and nutritional value of food.

 

Hygiene requirements: According to industry standards such as WS/T 646-2019 "Hygiene requirements for sodium percarbonate disinfectants", the production and use of sodium percarbonate disinfectants should comply with the requirements for raw materials, technical requirements, application scope, usage methods, transportation, storage and packaging, labeling requirements, and inspection methods.

 

Quality control: Food processing enterprises should implement strict quality control when using sodium bicarbonate, including inspection of raw materials, monitoring of the production process, and final product testing, to ensure that the use of sodium bicarbonate does not have a negative impact on the safety and quality of food.

 

The Application of Textile Industry

 

Bleached textiles

 

Sodium percarbonate, as an environmentally friendly bleaching agent, is widely used in the textile industry for textile bleaching treatment. Compared with traditional chlorine bleaching, sodium percarbonate bleaching is milder, causes less damage to fibers, and does not produce harmful by-products.

 

Bleaching effect: Sodium percarbonate can effectively decompose natural pigments and dyes in textiles, making their colors more uniform and bright.

 

Environmental characteristics: The oxygen and sodium carbonate produced after the decomposition of sodium percarbonate are harmless to the environment and meet the high environmental requirements of the current textile industry.

 

Improving fiber quality and texture

 

In addition to its bleaching effect, sodium percarbonate can also improve the fiber quality and feel of textiles, enhancing their market competitiveness.

 

Fiber quality: Sodium percarbonate treatment can remove impurities and fuzz from the fiber surface, making the fiber surface smoother and improving the overall quality of textiles.

 

Texture improvement: Textiles treated with sodium carbonate have a softer and more delicate texture, enhancing the user experience.

Application methods

 

In the textile industry, sodium percarbonate can be applied to the treatment of textiles through the following methods:

 

Pre treatment: Before dyeing or printing textiles, fibers are pre treated with sodium carbonate solution to remove natural impurities and prepare for subsequent dyeing or printing processes.

Post treatment: After the production of textiles is completed, post-treatment is carried out with a sodium carbonate solution to achieve bleaching and improve hand feel.

 

matters needing attention

 

When using sodium carbonate for textile treatment, the following points should be noted:

 

Concentration control: The concentration of sodium percarbonate should be reasonably controlled based on the type of textile and the required treatment effect to avoid excessive damage to the fibers.

 

Processing time: The length of processing time can affect the effectiveness of bleaching and fiber improvement, and needs to be adjusted according to specific circumstances.

 

Rinsing and neutralization: After treatment, the textiles should be thoroughly rinsed with clean water to remove residual sodium percarbonate. If necessary, neutralization treatment should be carried out to ensure the safety and comfort of the textiles.

 

Pulp production and paper processing

 

Improve pulp whiteness

 

Improving the whiteness of pulp is one of the key factors in improving the quality of the final paper product during the pulp production process. Sodium percarbonate, as an effective bleaching agent, can play an important role in the pulp bleaching process.

 

Bleaching effect: Sodium percarbonate can decompose lignin and other colored substances in the pulp, thereby improving the whiteness of the pulp and making the final produced paper cleaner and more shiny.

 

Environmental characteristics: Compared with traditional chlorine bleaching, the sodium percarbonate bleaching process produces fewer by-products and has a smaller impact on the environment, which meets the requirements of modern paper industry for environmental protection and sustainable development.

 

Paper processing and surface treatment

 

In the process of paper processing, sodium percarbonate can not only improve the whiteness of paper, but also improve the surface characteristics of paper, enhancing its quality and appearance.

 

Surface treatment: Sodium percarbonate can be used for surface treatment of paper to remove surface stains and impurities, making the paper surface smoother and more uniform.

 

Improving hand feel: Paper treated with sodium carbonate has a more delicate and soft hand feel, enhancing the paper's touch and user experience.

 

Application methods

 

The application of sodium percarbonate in pulp production and paper processing usually includes the following steps:

 

Pre treatment: In the pulp preparation stage, an appropriate amount of sodium percarbonate is added for pretreatment to decompose lignin and other colored substances.

 

Bleaching process: In the process of pulp bleaching, the amount of sodium percarbonate and processing time are controlled to achieve the desired whiteness effect.

 

Paper processing: After the paper is formed, a sodium carbonate solution can be used to treat the surface of the paper, improving its quality and appearance.

 

matters needing attention

 

When using sodium carbonate for pulp production and paper processing, the following points should be noted:

 

Concentration control: The concentration of sodium percarbonate should be reasonably controlled based on the characteristics of the pulp and the required whiteness effect to avoid excessive damage to the fibers.

 

Processing conditions: The temperature, pH value, and time during the processing need to be strictly controlled to ensure the bleaching effect and paper quality.

 

Post treatment: After treatment, the paper should be thoroughly rinsed with clean water to remove residual sodium percarbonate, ensuring the safety and environmental friendliness of the paper.

 

conclusion

 

The Industrial Application Prospects of Sodium Percarbonate

 

Diversified application areas: Sodium percarbonate has been applied in multiple industrial fields such as textiles, papermaking, water treatment, and food processing, demonstrating its wide applicability and high flexibility.

 

Environmental advantages: As a green chemical, sodium percarbonate has a relatively small environmental impact during use, which helps reduce the burden of industrial production on the environment and is in line with the trend of global sustainable development.

 

Technological innovation potential: With the advancement of technology, the production process and application technology of sodium percarbonate are expected to be continuously optimized, improve its performance and efficiency, and explore more application scenarios.

 

Contribution to industrial development

 

Improving product quality: Sodium percarbonate can significantly improve the appearance quality and performance of products in textile bleaching, paper processing, and other aspects, enhancing their market competitiveness.

 

Promoting production efficiency: The use of sodium percarbonate can simplify the production process, reduce energy consumption and processing time, and improve production efficiency and economic benefits.

 

Supporting industrial upgrading: The application of sodium percarbonate helps to promote the transformation and upgrading of traditional industries towards a more environmentally friendly and efficient direction, achieving green manufacturing.

 

Contribution to environmental protection

 

Reducing pollutant emissions: Sodium percarbonate, as an environmentally friendly chemical, its decomposition products are harmless to the environment and help reduce pollutant emissions in industrial production.

 

Promoting resource recycling: In areas such as water treatment, sodium percarbonate can help improve the reuse rate of water resources and support sustainable management of water resources.

 

Promoting the implementation of environmental regulations: The environmental characteristics of sodium percarbonate help meet increasingly stringent environmental regulations and promote the green transformation of industrial production.


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