Accepta 4211, 4212 and 4215 are three high-performance cationic poly(diallyldimethylammonium chloride) (PolyDADMAC) products manufactured by Accepta, a leading global supplier of water treatment chemicals. Differentiated by molecular weight, charge density and formulation concentration, these grades are engineered to address diverse industrial water treatment, sludge dewatering, papermaking and textile processing needs, with tailored performance to balance efficiency, cost and operational convenience. Below is a detailed analysis of their applications, totaling 900 words.
Water purification is the primary scenario for Accepta’s PolyDADMAC series, where each grade targets distinct water quality challenges. Accepta 4211 is a low-to-medium molecular weight, low-concentration grade optimized for small-scale drinking water treatment and low-turbidity wastewater pre-treatment. It excels in clarifying surface water from lakes and reservoirs, neutralizing negative charges on suspended colloids, algae and natural organic matter (NOM) like humic acids. When used as a coagulant aid with polyaluminum chloride (PAC) or ferric sulfate, it forms compact, fast-settling flocs, reducing turbidity by 85–90% and lowering disinfection byproduct (DBP) precursors by 20–25% to meet strict drinking water standards such as EPA and WHO guidelines. It is also ideal for pre-treating lightly polluted effluent from food and beverage plants, removing fine suspended solids to reduce the load on downstream biological treatment systems, with the advantage of easy dilution and flexible dosing for small facilities with limited equipment.
Accepta 4212, a medium molecular weight, balanced-concentration grade, is the versatile workhorse for mainstream industrial water treatment. It is designed for medium-to-high turbidity wastewater from papermaking, printing and dyeing, and steel manufacturing industries, where it functions as both a primary coagulant and emulsion breaker. Its moderate charge density enables it to break oil-in-water emulsions effectively, separating emulsified oils and suspended solids from industrial effluent, reducing chemical oxygen demand (COD) by 25–30% and oil content by over 40%. For electroplating wastewater containing low levels of heavy metal ions (Pb²⁺, Cu²⁺, Zn²⁺), it chelates these ions to form insoluble complexes, which can be removed via sedimentation or filtration, ensuring compliance with industrial discharge limits. With stable performance in a pH range of 4–10, it adapts to fluctuating water quality without frequent dosage adjustments, making it a cost-effective choice for medium-to-large wastewater treatment plants.
Accepta 4215 is a high molecular weight, high-charge-density grade tailored for heavy-duty water treatment scenarios. It targets high-turbidity, high-organic-content wastewater from mining, coal washing and petrochemical industries, where conventional coagulants fail to capture fine, stable colloidal particles. Its strong cationic adsorption capacity aggregates these particles into large, dense flocs, accelerating sedimentation and clarifying turbid water rapidly, even in the presence of high levels of suspended solids (up to 5,000 mg/L). In reverse osmosis (RO) and ultrafiltration (UF) membrane pre-treatment, it is a premium choice for reducing silt density index (SDI), removing colloidal silica and organics that cause membrane fouling, extending membrane lifespan by 35–40% and cutting cleaning frequency by half. It also performs exceptionally well in treating landfill leachate, a complex wastewater with high organic load and toxicity, by enhancing the removal of refractory organics and ammonia nitrogen, supporting subsequent advanced treatment processes.
In sludge dewatering, Accepta 4211 is suitable for conditioning low-organic municipal primary sludge, improving floc strength for belt filter presses and reducing sludge cake water content by 10–12%. Accepta 4212 handles mixed municipal sludge and light industrial chemical sludge, pairing well with centrifuges to lower dewatering energy consumption by 15%. Accepta 4215 is the top choice for high-organic, sticky sludge from anaerobic digestion and pharmaceutical plants, forming shear-resistant flocs that withstand high-speed centrifugation, reducing cake moisture by 15–20% and cutting sludge disposal costs significantly.
In papermaking, Accepta 4211 acts as a retention aid for low-grade packaging paper, boosting fine fiber retention by 12–15%. Accepta 4212 serves as a pitch control agent and strength modifier for offset printing paper, reducing machine downtime caused by pitch deposits. Accepta 4215 enhances wet strength and surface smoothness for high-end coated paper and food-grade packaging paper, meeting strict quality standards. In textiles, all three grades function as formaldehyde-free dye-fixing agents for anionic dyes, with Accepta 4215 delivering superior color fastness for outdoor textiles and industrial fabrics
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Accepta 4212
Accepta 4215
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