Powdered activated carbon dedicated to decolorization is a highly efficient adsorbent specially developed and produced for removing pigments from various substances. It is processed through refined carbonization and activation processes, using high-quality wood-based, coconut shell or coal-based materials as raw materials. It appears as a black fine powder externally, and internally it has an extremely developed pore structure. This unique structure endows it with a powerful adsorption ability, enabling it to selectively adsorb colored impurities in solutions or gases. It is widely used in numerous industries that require decolorization treatment, effectively improving the color quality and purity of products.
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Iodine Value: Generally, the iodine value of wood-based powdered activated carbon for decolorization is between 700 - 1000mg/g, that of coconut shell powdered activated carbon for decolorization can reach 900 - 1200mg/g, and that of coal-based powdered activated carbon for decolorization is usually between 300 - 600mg/g. The level of the iodine value reflects its adsorption capacity for small molecular colored substances. The higher the iodine value, the stronger the adsorption performance and the more conducive it is to removing complex organic pigment molecules.
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Particle Size: The particle size is relatively fine. Generally, more than 80% can pass through a 200-mesh sieve (i.e., the particle diameter is less than 0.075mm). The fine particle size ensures its good dispersibility in solutions and a large contact area, enabling it to quickly contact and adsorb pigment molecules.
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Specific Surface Area: It has a relatively large specific surface area, mostly ranging from 800 - 1500m²/g. The vast specific surface area provides a large number of adsorption sites for pigment molecules, allowing it to efficiently adsorb pigment molecules of various types and sizes. Whether they are large molecular natural pigments or small molecular synthetic pigments, they can all be effectively removed.
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pH Value: The pH value ranges approximately from 4 to 10. This range enables it to adapt to the acid-base environments of most solutions. During the decolorization process, it will not cause significant interference to the solution system due to its own acid-base properties, ensuring the stability and reliability of the decolorization process.
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Methylene Blue Adsorption Value: This value is an important indicator for measuring the adsorption capacity of activated carbon for large molecular pigments and certain pigments with specific structures. Powdered activated carbon dedicated to decolorization has a relatively high methylene blue adsorption value. For example, the methylene blue adsorption value of coconut shell powdered activated carbon for decolorization can reach 180 - 250mg/g, indicating its excellent adsorption effect on large molecular pigments and some pigments with complex structures. It can effectively meet the decolorization requirements for materials containing large molecular pigments in industries such as food, textile, and chemical engineering.
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Food Industry: In the sugar production process, it is used to remove colored impurities such as caramel pigments and melanoidins in sugar liquid, making products such as white sugar and rock sugar bright and white in color. In the production of fruit juices, beverages, brewed wines, and edible oils, it can adsorb natural pigments, caramel pigments, and colored substances generated during processing or storage, improving the clarity and appearance quality of products and enhancing their market competitiveness.
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Pharmaceutical Industry: In the processes of drug synthesis, extraction, and refinement, it adsorbs colored impurities in drug raw materials or intermediates, ensuring the purity and quality of drugs, ensuring that drugs meet the color standards stipulated in pharmacopoeias. Meanwhile, it also helps to improve the stability and safety of drugs.
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Chemical Engineering Field: In the production of chemically synthesized pigments, it is used for decolorization and purification of the crude pigment products after synthesis, removing by-products and impurity pigments to obtain high-purity pigment products with bright and consistent colors. In industries such as plastics, rubber, and chemical fibers, it can remove trace pigments in raw materials or products and colored substances generated due to aging and degradation, improving the appearance and performance of products.
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Textile Printing and Dyeing: It is used for the treatment of textile printing and dyeing wastewater, adsorbing dye molecules in the wastewater to reduce the chromaticity of the wastewater and make it meet the emission standards. Meanwhile, it can also be used for pre-treatment of fabrics before printing and dyeing, removing natural impurities and residual pigments on the fabrics to improve the printing and dyeing effects and fabric quality.
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High Decolorization Ability: With its developed pore structure, high specific surface area, and suitable surface chemical properties, it can quickly and massively adsorb various pigment molecules. It has a significant decolorization effect on many common pigments such as caramel color, chlorophyll, anthocyanin, azo dyes, and anthraquinone dyes. It can make colored solutions or gases achieve a relatively high decolorization rate in a short time, effectively improving the color quality of products.
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Good Selectivity: During the decolorization process, it can conduct selective adsorption according to the structures, sizes, and polarities of pigment molecules. While removing pigments, it can maximize the retention of effective components and nutrients in solutions or gases. For example, in the food and pharmaceutical industries, it will not have a significant impact on the flavor, taste, and efficacy of products, ensuring the quality and efficacy of products.
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Fast Adsorption Rate: Due to its fine particle size and uniform dispersibility, it has sufficient contact with pigment molecules and the adsorption process is rapid. It can reach the adsorption equilibrium in a relatively short time, greatly shortening the time cycle of the decolorization treatment and improving production efficiency. It is especially suitable for the continuous decolorization process in large-scale industrial production.
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Convenient and Flexible to Use: Existing in powder form, the addition amount and usage method can be conveniently adjusted according to different decolorization requirements and process conditions. It can be directly added to solutions for stirring adsorption or used in combination with other filtering media. For example, it can be used as an adsorption layer in plate-and-frame filtration, vacuum filtration and other equipment, with simple operation and strong adaptability.
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Appearance and Shape: It appears as a black powder with no fixed shape and obvious crystal structure, and is fine and uniform in texture. This powdery form enables it to be fully dispersed in solutions or gases to be decolorized, achieving all-round contact with pigment molecules and thus improving the adsorption efficiency.
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Pore Structure: It has abundant micropores, mesopores, and macropores. Micropores (with a pore diameter less than 2nm) are the main sites for adsorbing small molecular pigments, and their powerful adsorption force can effectively capture pigment molecules such as some small molecular synthetic dyes. Mesopores (with a pore diameter between 2 - 50nm) play an important role in adsorbing large molecular pigments and facilitating the diffusion of pigment molecules inside the activated carbon, having a good adsorption effect on protein-based pigments, large molecular natural pigments, etc. Macropores (with a pore diameter greater than 50nm) mainly provide macroscopic channels, enabling solutions or gases to smoothly enter the internal pore network of the activated carbon and ensuring the smooth progress of the adsorption process. This multi-level pore structure enables it to adapt to pigment molecules of different molecular sizes and structures, achieving a broad-spectrum decolorization function.
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Density Characteristics: The bulk density is relatively small, generally ranging from 0.3 - 0.6g/cm³. The small bulk density occupies less space during storage and transportation, which is convenient for management and operation. Meanwhile, when in use, it can be suspended and dispersed relatively evenly in solutions, which is beneficial for full contact with pigment molecules and improving the decolorization effect.
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Chemical Stability: Under normal temperature and pressure, it has good tolerance to most common solvents, acid-base media, and chemical reaction conditions, and will not react with substances to be decolorized to cause secondary pollution or change the chemical properties of products. In the general decolorization process temperature range (usually - 20℃ - 80℃) and common acid-base environments (pH value 4 - 10), it can stably play a decolorization role, ensuring the safety and reliability of the decolorization process.
- Surface Functional Groups: Its surface has a certain number of functional groups, such as carboxyl groups (-COOH), hydroxyl groups (-OH), lactone groups, etc. On the one hand, these functional groups can interact with certain polar pigment molecules through hydrogen bonding or chemical bonding, enhancing the adsorption effect. On the other hand, the existence of these functional groups also provides a basis for the surface modification of the activated carbon. By modifying or changing the quantity and types of these functional groups, the adsorption performance and selectivity of the activated carbon can be adjusted to better meet the decolorization requirements for different types of pigments.
FAQ
What raw materials are used to produce your decolorization powdered activated carbon?
We use high-quality wood-based, coconut shell, and coal-based materials to manufacture our decolorization activated carbon. These sources provide a developed pore structure and high adsorption capacity, ensuring efficient pigment removal for various industrial applications.
Can you customize powdered activated carbon to meet specific industrial requirements?
Yes, we offer customized specifications of powdered activated carbon suppliers products to fit different pigment sizes, adsorption rates, and processing conditions. Please contact us to discuss your specific needs, and we will tailor the product accordingly.
How should I determine the appropriate dosage for efficient pigment removal in my process?
Dosage depends on your feed material and the level of decolorization desired. We recommend consulting our technical team to evaluate your process and provide precise dosing guidance to maximize effectiveness using our decolorization activated carbon.
What packaging options and delivery lead times are available for your products?
Packaging and lead times vary based on order size and product type. We handle logistics professionally to meet your schedule. Contact us directly for detailed information and a quote on our powdered activated carbon suppliers packaging and delivery options.
