Global Chemical Engineering Leadership in High-Molecular PHPA, Anionic, Cationic & Nonionic Water-Soluble Polymers for EOR, Drilling Fluid Additives, Mining Tailings & Advanced Industrial Water Reclamation.
High-purity polyacrylamide grades engineered for critical separation and rheology modification.
Established in 2011 within the Qingdao Free Trade Zone, Oubo Chemical operates world-class automated bio-polymerization production lines committed to quality, eco-conscious chemical manufacturing, and technical innovation.
Polyacrylamide (PAM) is a water-soluble synthetic linear polymer formed by the polymerization of acrylamide monomers. It stands as one of the most versatile synthetic hydrocolloids utilized across modern heavy industry. Derived through sophisticated bio-catalytic polymerization techniques, PAM products exist primarily in solid powder, granular, micro-emulsion, and liquid dispersion forms. Depending on the chemical nature of the side chains, PAM is categorized into four main ionic categories: Anionic Polyacrylamide (APAM), Cationic Polyacrylamide (CPAM), Nonionic Polyacrylamide (NPAM), and Amphoteric/Mannich Polyacrylamide.
Among these, Partially Hydrolyzed Polyacrylamide (PHPA) represents a specialized anionic derivative engineered via controlled alkaline hydrolysis or copolymerization of acrylamide with acrylic acid. PHPA features high carboxylate functional group density along its macromolecular backbone, providing high charge density, extreme chain expansion, and exceptional water-retention capabilities. As a premium China Anion Polyacrylamide PHPA Supplier & Factory, Qingdao Oubo Chemical delivers high-molecular-weight polymers tailored specifically to overcome complex geotechnical, petrophysical, and hydro-environmental challenges.
The high performance of APAM and PHPA stems from their dual physical-chemical mechanism: charge neutralization and macromolecular bridging. When introduced into aqueous suspensions, the ionized carboxylate groups (-COO⁻) generate electrostatic repulsion along the polymer chain, causing it to extend into an elongated coil conformation. These extended chains adsorb onto suspended particulate surfaces via hydrogen bonding and dipole interaction, bridging multiple particles into heavy, rapidly settling flocs.
| Polymer Property | Standard APAM Grade | High-Molecular PHPA Grade | Ultra-High MW EOR Grade |
|---|---|---|---|
| Molecular Weight (MW) | 8 Million – 18 Million Daltons | 16 Million – 22 Million Daltons | 22 Million – 28+ Million Daltons |
| Degree of Hydrolysis | 15% – 30% | 25% – 40% | 20% – 35% |
| Solid Content | ≥ 88% | ≥ 90% | ≥ 90% |
| Dissolution Time | ≤ 60 Minutes | ≤ 45 Minutes | ≤ 60 Minutes |
| Residual Monomer Content | ≤ 0.05% (500 ppm) | ≤ 0.05% (500 ppm) | ≤ 0.02% (200 ppm) |
| UL Viscosity (0.1% soln) | 3.5 – 6.5 mPa.s | 6.0 – 9.5 mPa.s | ≥ 10.0 mPa.s |
The global demand for high-performance anionic polyacrylamide and PHPA is experiencing unprecedented structural growth driven by three macro-economic catalysts:
PHPA acts as a core fluid additive in water-based drilling muds. It coats drilling cuttings, prevents clay hydration and swelling, stabilizes vulnerable shale formations, lubricates the drill string, reduces fluid loss into porous strata, and increases cuttings transport capacity.
Applied across municipal plants, petrochemical refining, textile dyeing, and steel processing. APAM promotes rapid floc formation, accelerates sedimentation in clarifiers, and dramatically increases cake dryness in belt filter presses, centrifuge decanters, and chamber filter presses.
Crucial for coal washing slurry clarification, tailings thickening, counter-current decantation (CCD) circuits, and extraction of gold, silver, iron, and copper. Facilitates crystal-clear recycled process water while minimizing tailings pond footprint.
Functions as wet-end paper retention aids, drainage accelerators, dry/wet strength agents, and anionic trash scavengers. Enhances fine fiber retention, cuts raw material loss, reduces white water turbidity, and yields higher tensile strength paper sheets.
As a premiere manufacturer in China's Qingdao Free Trade Zone, Oubo Chemical Co., Ltd. offers unprecedented institutional advantages for international supply chain managers and chemical distributors:
Blank-Bag Export Packaging
Standard Oubo Bag
Heavy Duty Packaging
Export Fumigated Pallet
Water Treatment Dewatering
Paper Mill Application
Mining Tailings Dewatering
Sugar Clarification System
As industrial processing environments demand operation under elevated temperatures, hypersaline conditions, and extreme mechanical shear, Oubo Chemical's R&D team is pioneering next-generation polymer innovations:
Technical and procurement answers for chemical engineers, sourcing specialists, and plant managers.
Standard Anionic Polyacrylamide (APAM) primarily functions as a general-purpose flocculant for suspended solids settling. PHPA (Partially Hydrolyzed Polyacrylamide) contains a precise high level of carboxylate group hydrolysis (20%-35%) designed specifically for viscosity enhancement, clay encapsulation, shale inhibition in oilfield drilling muds, and secondary/tertiary enhanced oil recovery (EOR).
PAM powder must be added gradually into a turbulent vortex of clean water using a mechanical auto-doser or eductor system at a concentration of 0.1% to 0.3% (w/v). The solution should be stirred gently at 200-400 RPM for 45 to 60 minutes. Excessive shear stirring (>1000 RPM) should be avoided to prevent molecular polymer chain degradation.
When kept in original unopened packaging within a cool, dry, and ventilated warehouse below 35°C (95°F), solid dry PHPA powder has a shelf life of 24 months. Aqueous working solutions should be consumed within 24 to 48 hours to prevent loss of viscosity due to microbial degradation or hydrolytic breakdown.
Located in the Qingdao Free Trade Zone right next to Qingdao Port (one of the largest deep-water shipping hubs in Asia), Oubo Chemical offers seamless ocean freight dispatch. We ship in 20ft/40ft FCLs packed with 25kg kraft bags or 750kg jumbo bags, fully palletized and shrink-wrapped with short lead times.
Explore our full line of specialized cationic, anionic, and nonionic polyacrylamide formulations.
Oubo Chemical