Dyeing Wasteater Decoloring Chemicals PolyDCD Cationic Copolymer Decoloring Agent

Dyeing Wastewater Decoloring Chemicals PolyDCD

Cationic Copolymer Decoloring Agent

​Description:
The water decolorant composed of dicyandiamide-formaldehyde resin can effectively remove color from dye-containing wastewater through a dual mechanism. As a quaternary ammonium cationic copolymer, it releases abundant cations that neutralize the negative charges on dye molecules, thereby destroying the stability of their colloidal structure. Meanwhile, its hydrolysis produces large flocculent substances (such as the CW-08 formula), which can adsorb and encapsulate the destabilized dye particles. This integrated process of charge neutralization and flocculation enables the effective separation of dyes from water. The decolorant exhibits outstanding performance in decolorization, floc formation, and chemical oxygen demand (COD) reduction. Therefore, it is particularly suitable for treating complex industrial dye wastewater.


Application:

1.Primary Function

Specialized in high-efficiency decolorization of industrial effluents, particularly for:

Reactive, acidic, and disperse dyes (common in dye manufacturing)

Wastewater from textile dyeing, pigment production, printing ink, and paper manufacturing

2.Secondary Application

Acts as a retention agent in paper/pulp production, enhancing process efficiency.

Instructions for use:

1. Dilution Requirement

Dilute the product with water at a 1:10 to 1:40 (product:water) ratio before use.

Stir thoroughly for several minutes, then clarify via sedimentation or air flotation.

2. Optimal pH Range

Maintain wastewater pH between 6 and 10 for best results.

3. High-Strength Wastewater Treatment

For highly colored or high-COD effluents, combine with inorganic flocculants to improve efficiency and reduce costs.

Determine dosage and application sequence based on flocculation tests and process conditions.

4. Low-Temperature Handling

May experience layer separation or whitening in cold conditions—remix well before use; performance remains unaffected.

Concentration and viscosity of solution can be customized according to customers’ needs.

Water Decolorant Performance Highlights:

High-Efficiency Decolorization: Removes 85–95% of dyes from solution.

COD Reduction: Lowers Chemical Oxygen Demand (COD) by ~60%.

Enhanced Process Efficiency: Promotes faster sedimentation and improved flocculation.

Eco-Friendly Composition: Contains no aluminum, chlorine, or heavy metal ions, ensuring environmental safety.

Success Cases:

1. Samples of Printing and Dyeing Wastewater Sent by the Customer:

the wastewater samples were deeply colored and turbid.

2. Customer Requirements: the customer requested decolorization of the wastewater.

3. Experimental Procedures
a. Add a decolorizing agent.
b. Add PAC (Polyaluminium Chloride).
c. Add PAM (Polyacrylamide).

4. Comparison of Experimental Results
After using our company's decolorizing agent, significant decolorization effects were observed in the wastewater from both the drainage outlet and the secondary sedimentation tank. Flocs formed and settled, resulting in clear water quality. The customer was very satisfied with the results.

Package and Storage:

Safety Profile

Non-toxic, non-flammable, and non-explosive. Store away from direct sunlight.

Packaging Options

Available in

Plastic drums (30 kg / 50 kg / 250 kg)

IBC tanks (1000 kg / 1250 kg)

Custom packaging upon request

Storage Guidelines

Slight layering may occur over time but does not affect performance. Mix well before use.

Recommended storage temperature: 5–30°C.

Our services:

With over 12 years of manufacturing expertise and engineers boasting 20+ years of industry experience, we are committed to delivering high-quality products, comprehensive after-sales support, and on-site testing services.

Our solutions including:

Customized water treatment chemicals tailored to your needs.

Expert technical guidance to optimize performance and efficiency.

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WUXI LANSEN CHEMICALS Co., Ltd. is a leading company of water treatment chemicals, pulp&paper chemicals and textile dyeing auxiliaries in China, with decades of experience in dealing with R&D, and application service. WUXI TIANXIN CHEMICAL Co., Ltd is a wholly owned subsidiary of Wuxi Lansen Chemicals Co., Ltd., it′s located in Sanmu Chemical Industry Park, Yixing, Jiangsu.

Our main products include water decoloring agent (polyDCD), polydadmac, polyamine, polyacrylamide emulsion, paper fixing agent, retention and drainage aids, surface sizing agent, dry / wet strength agent, coating additives (water resistant agent, lubricant, dispersant), formaldehyde-free color fixing agent in printing and dyeing, etc. The annual output of water decoloring agent is 30, 000 tons, polydadmac and polyamine is 10, 000 tons each, and other auxiliaries is 30, 000 tons. WUXI TIANXIN successfully passed ISO9001 quality management certification and ISO14001 Environment Management Certification.

With more than ten years of experience in research and application, LANSEN has professional R & D team, applications team and sales team, focused solve problems and reduce operating costs for customers. Most of the our products are sold to foreign markets, also have a good reputation in the international market. We have long-term partners in the European Union, the America, Asia, Africa and other places.

We establish long-term friendly cooperation with domestic and foreign customers, by providing quality products, competitive prices, professional advice and service, in order to achieve common goals of customers.