Product Details

Poly Aluminum Chloride (PAC)

1. Product Overview

Poly Aluminum Chloride (PAC), also known as polyaluminum, is a water-soluble inorganic polymer coagulant. It neutralizes colloidal charges and bridges suspended particles in water, forming large flocs that settle rapidly. With high efficiency, wide pH adaptability, and low residual aluminum, it is widely used in drinking water, industrial wastewater, and municipal sewage treatment.

2. Appearance & Technical Specifications

Core Technical Parameters

3. Core Functions

3.1 Charge Neutralization & Colloid Destabilization

PAC carries strong positive charges that neutralize negative charges on colloidal particles in water, breaking their stability and enabling aggregation into larger flocs.

3.2 Adsorption Bridging & Rapid Flocculation

The polymer chains act as bridges between fine particles, forming large, dense flocs that settle quickly, significantly improving water clarity and reducing treatment time.

3.3 Multi-Pollutant Removal 

4. Product Application

· Drinking Water Treatment: Clarification, turbidity removal, and heavy metal reduction to meet drinking water standards

· Industrial Wastewater Treatment: Removal of COD, BOD, and toxic substances from various industrial effluents

· Municipal Sewage Treatment: Primary clarification and sludge conditioning for sewage systems

· Specialized Water Treatment: Used in mining, textile, and chemical wastewater processes

5. Product Advantages

✅ High Coagulation EfficiencyFlocculation efficiency is 1.5 times higher than traditional products, with fast settling rates.

✅ Wide pH AdaptabilityEffective across a broad pH range, reducing the need for frequent pH adjustment.

✅ Broad ApplicabilitySuitable for various types of wastewater, municipal sewage, and drinking water sources.

✅ Low Residual AluminumMinimal residual aluminum in treated water, meeting strict drinking water safety standards.

✅ Temperature InsensitivityMaintains stable performance even at low water temperatures, with minimal seasonal impact.

✅ Non-Corrosive & SafeNon-corrosive to equipment and compliant with environmental safety requirements.

6. Packaging Specification

· Solid Form: 25 kg/bag in triple-layer composite moisture-proof kraft paper bags.

· Liquid Form: 1000 kg IBC tanks, or 200 kg / 25 kg plastic drums.

· Customizable packaging specifications are available according to client requirements.

· Handle with care during transportation.

7. Storage & Transportation

Store in a cool, dry, and ventilated place. Protect the product from moisture, fire, and high temperatures to maintain its quality and performance.

8. Disclaimer & Technical Support

All specifications and descriptions in this document are for reference only. The product shall be used in accordance with the customer’s actual working conditions and technical requirements. Customized formulations and solutions are available upon request.

Application Cases of Polyaluminum Chloride in Drilling Fluids and Water Treatment

1. Breaking and Coagulation Clarification Case for Drilling Wastewater

Case Background: Drilling wastewater contains bentonite colloids, residual polymers and fine solid particles, featuring stable colloid state, high turbidity, difficult natural sedimentation and poor clarity. Conventional single flocculants have low gel breaking efficiency, incomplete impurity removal and long treatment cycle, resulting in unqualified effluent water quality, which cannot meet the requirements of on-site discharge and reuse.

Application Formula & Dosage: In the primary treatment stage of drilling wastewater, 0.005%–0.01% polyaluminum chloride (PAC) is added as the main coagulant, and compounded with a small amount of anionic polyacrylamide for synergistic treatment to realize rapid gel breaking and sedimentation.

Application Effect: PAC has strong charge neutralization and gel breaking capabilities, which can rapidly destroy the stable colloidal structure of drilling wastewater, aggregate suspended fine particles and colloidal impurities into dense flocs, and accelerate solid-liquid separation. It effectively improves the clarification efficiency of drilling wastewater, significantly reduces water turbidity and suspended solid content, shortens the treatment cycle, and ensures stable and up-to-standard effluent water quality for subsequent discharge or resource reuse.

2. Flocculation and Solid-liquid Separation Harmless Case for Waste Water-based Drilling Mud

Case Background: Waste water-based drilling mud has fine particles, high viscosity and stable hydration colloid, resulting in slow natural sedimentation and difficult solid-liquid separation. Traditional curing and drying treatment methods have high cost, long cycle and low treatment efficiency, which cannot adapt to the rapid harmless disposal requirements of large-volume waste mud on site.

Application Method & Dosage: According to different mud system types, 1.8%–2.0% PAC is added per cubic meter of waste mud, combined with auxiliary flocculant and stabilizer for pretreatment. It is suitable for polymer system and polysulfide system waste mud to realize efficient solid-liquid separation.

Application Effect: PAC can efficiently neutralize the negative charge on the surface of mud colloidal particles, destroy the hydration stability of waste mud, rapidly condense fine mud particles into large flocs, and thoroughly solve the problem of difficult mud-water separation. The separated clear liquid has stable indexes and can be reused after treatment. The solid mud residue meets environmental protection landfill standards, which greatly reduces waste mud disposal cost and improves on-site environmental protection treatment efficiency.

3. Oil Removal and Turbidity Reduction Reinjection Case for Oilfield Produced Water

Case Background: Conventional oilfield produced water contains dispersed oil, emulsified oil and a large number of suspended colloids, with high turbidity, high oil content and unstable water quality. Simple sedimentation cannot remove emulsified oil and micro-fine impurities, which easily causes reservoir pore blockage and pipeline scaling after reinjection, affecting oilfield water injection development efficiency.

Application Dosage: In the primary coagulation stage of produced water treatment, 0.04%–0.08% PAC is added as the main inorganic coagulant, which is compounded with organic flocculants to strengthen oil removal and impurity purification.

Application Effect: PAC has excellent demulsification and coagulation performance, which can effectively break emulsified oil droplets in produced water, adsorb and wrap suspended impurities and colloidal particles to form precipitable flocs. It significantly reduces water turbidity, oil content and partial COD value, improves water quality uniformity. The treated water fully meets oilfield reinjection standards, effectively prevents reservoir and pipeline blockage, and realizes long-term stable reinjection and resource recycling of produced water.

4. Pretreatment Clarification and COD Reduction Case for High-viscosity Fracturing Flowback Fluid

Case Background: Shale gas and tight oil fracturing flowback fluid has high viscosity, high COD, many residual chemical agents and complex colloid components. The water body is turbid and difficult to clarify, with poor natural sedimentation effect. It is difficult for single oxidation and filtration processes to achieve standard treatment, which restricts the harmless disposal of fracturing wastewater.

Application Method & Effect: PAC is added at a dosage of 0.06%–0.10% in the pretreatment stage of fracturing flowback fluid. It is used for preliminary coagulation and clarification, matching with advanced oxidation and filtration processes. It can effectively remove macromolecular colloids and suspended pollutants, reduce water viscosity and COD load, improve the efficiency of subsequent deep treatment, and make the final effluent quality stable and up to standard.

5. Salt-resistant Stable Purification Case for High-mineralization Drilling Sewage

Case Background: High-mineralization drilling sewage in salt-gypsum formations has strong electrolyte interference, complex ion components and many fine suspended solids. Conventional flocculants are sensitive to salt pollution, prone to failure and poor coagulation effect, resulting in poor water clarification effect and difficult standard compliance, which cannot meet the treatment requirements of high-salt complex drilling sewage.

Application Method & Effect: The conventional dosage is 0.05%–0.09%. PAC has strong salt resistance and electrolyte interference resistance, stable coagulation performance in high-mineralization water bodies, no failure or deterioration. It can efficiently remove suspended solids, colloids and trace oil impurities in high-salt sewage, stabilize water turbidity and indexes, solve the problem of difficult purification of high-salt drilling sewage, and realize stable and up-to-standard treatment of complex salt-containing drilling wastewater.