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DC Coal Granular Carbon – High Efficiency Decolorization for Chemical & Sugar

Manufactured from premium bituminous coal through carbonization and high-temperature steam activation, DC series is a high-quality coal-based granular activated carbon specially developed for liquid phase decolorization and purification. Its well-developed porous structure delivers reliable adsorption performance for colored impurities, organic by-products and odor substances in liquid, widely used in chemical, sugar, pharmaceutical and other industries for continuous fixed-bed refining processes.
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Product Overview

DC granular activated carbon adopts selected high-quality bituminous coal as raw material, processed through controlled carbonization and steam activation to form a balanced pore structure with rich mesopores and macropores, providing excellent adsorption capacity for macromolecular pigments, organic impurities and colloidal substances in liquid.

With high mechanical strength and abrasion resistance, it is suitable for fixed-bed continuous treatment systems and supports multiple thermal regeneration cycles, effectively reducing long-term operation costs. It is available in two standard particle size grades, DC 830 and DC 1240, to adapt to different treatment flow rates and process requirements.

Specifications

Parameter

DC 830 Specification

DC 1240 Specification

Unit

Iodine Adsorption Value

> 950

> 950

mg/g

Moisture Content

< 5

< 5

%-wt

Methylene Blue Adsorption Value

> 160

> 160

mg/g

Average Particle Size

1.4 - 1.7

1.2 - 1.4

mm

Granule Hardness

> 90

> 90

%

Specific Surface Area

> 900

> 900

m²/g

Particle Size > 8 Mesh (1.70 mm)

< 10

-

%-wt

Particle Size > 12 Mesh (1.70 mm)

-

< 5

%-wt

Particle Size < 30 Mesh (0.6 mm)

< 5

-

%-wt

Particle Size < 40 Mesh (0.43 mm)

-

< 5

%-wt

Available particle size

  • 8×30 Mesh ( 0.6 ~ 2.36 mm)

  • 12×40 Mesh ( 0.43 ~ 1.7 mm)

Packaging

25 kg/bag、500 kg/bag

Key Features

  • High Decolorization Performance (≥950 mg/g iodine, ≥160 mg/g methylene blue)

    Effectively removes colored impurities, organic by-products and odor substances in various liquid systems, meeting conventional purification and decolorization standards.

  • High Mechanical Strength (>90% hardness)

    Resistant to friction and extrusion in fixed-bed systems, produces less fine powder, adapts to frequent backwashing and regeneration cycles.

  • Standardized Particle Size Options

    Available in 8×30 mesh (DC 830) and 12×40 mesh (DC 1240), suitable for different flow velocity and pressure drop requirements.

  • Thermally Regenerable

    Supports multiple thermal regeneration cycles, restores most adsorption capacity, reduces comprehensive operation cost for large-scale production.

Applications

  • Organic Acid Purification: Acetic acid, citric acid and lactic acid production generates colored byproducts and organic impurities that degrade product grade. DC's mesopore-rich coal structure adsorbs these macromolecular contaminants, improving acid clarity without introducing inorganic residues.

  • Sugar Liquor Decolorization: Raw sugar juice and syrup contain polyphenolics and caramel compounds responsible for color. DC's balanced pore structure targets these pigment molecules while allowing smaller sugar molecules to pass through, maximizing decolorization efficiency without sugar loss.

  • General Chemical Purification: Fine chemical and petrochemical liquid streams require color and odor polishing. DC provides cost-effective decolorization for continuous fixed-bed operations where premium grades would be economically impractical.

  • Pharmaceutical Intermediate Polishing: Pharmaceutical bulk drug production requires removal of colored impurities and byproducts. DC's high mechanical strength supports continuous fixed-bed operation and multiple regeneration cycles for cost-sensitive pharmaceutical applications.

Technical Advantages

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  • Cost-effective liquid-phase purification solution compared to coconut shell and wood-based granular carbon, suitable for large-volume industrial production.

  • Balanced micro-meso-macropore structure provides good adsorption effect on both small molecular impurities and macromolecular pigments.

  • High strength and low wear rate ensure long service life in fixed-bed systems with low carbon loss during operation.

  • Tested in strict accordance with GB/T 7702-2008 national standard for stable batch quality and traceable indicators.

Certifications

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PURESTAR adheres to strict quality control and international certification standards. Our authentic certifications include:

  • ISO 9001: Quality Management System

  • ISO 14001: Environmental Management System

  • ISO 45001: Occupational Health & Safety Management System

  • NSF: Certified for drinking water safety & sanitation

  • HALAL: Certified for food-contact applications

Quality Assurance

  • MSDS (Material Safety Data Sheet) available upon request

  • COA (Certificate of Analysis) provided with every shipment

All products undergo strict quality inspection to deliver stable, reliable performance for global customers.

Why Choose Us

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  • 10+ years of experience in activated carbon manufacturing and export

  • Stable production capacity ensuring reliable supply for bulk orders

  • Strict quality control system from raw material to final product

  • Customized solutions based on different industrial applications

  • Fast response within 12–24 hours for all inquiries

  • Professional technical support for product selection and application guidance

FAQ

Q: What is the difference between DC 830 and DC 1240?

A: DC 830 (8×30 mesh) has larger particle size and lower pressure drop, suitable for high-flow and high-viscosity liquid systems. DC 1240 (12×40 mesh) has smaller particle size and faster adsorption rate, suitable for fine decolorization with higher purification requirements.

Q: Can DC be regenerated and reused?

A: Yes, DC coal-based granular carbon supports high-temperature thermal regeneration. After adsorption saturation, most adsorption capacity can be restored through professional regeneration, suitable for continuous industrial production to reduce material cost.

Q: Is DC suitable for food-grade sugar decolorization?

A: DC is designed for general industrial decolorization. For food-grade production with strict safety requirements, we recommend acid-washed DCS series or wood-based F-series powdered activated carbon with food production license.

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Activated Carbon for Sugar Decolorization
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