High-Basicity PAC: Tropical Choice

From our 28 years of experience in water treatment chemical production and export, we’ve discovered a clear pattern — high basicity Polyaluminum Chloride (PAC) performs significantly better in tropical and subtropical environments, where the temperature is high, the pH is often alkaline, and turbidity fluctuates greatly.

That’s why most of our customers in Southeast Asia, Africa, and Latin America prefer high-basicity PAC over standard grades.

What Is High Basicity PAC?

The performance of PAC largely depends on its basicity (B value), which represents the ratio of hydroxyl ions (OH⁻) to aluminum ions (Al³⁺).

⭕Low-basicity PAC (B < 50%) — suitable for acidic water

⭕Medium-basicity PAC (B = 50–70%) — for general-purpose treatment

⭕High-basicity PAC (B = 70–90%) — ideal for alkaline, high-temperature, and high-turbidity water

High-basicity PAC typically appears light yellow to golden, reacts faster, forms larger flocs, and remains stable even under high temperatures.

Why Is It More Suitable for Tropical and Subtropical Industries?

Countries such as Indonesia, Vietnam, Thailand, Malaysia, Nigeria, and Brazil face high water temperatures and alkaline conditions year-round.

In these environments:

● Standard PAC hydrolyzes too quickly, causing poor floc formation.

● High-basicity PAC, on the other hand, maintains strong polymer structure, ensuring consistent performance.

Key Advantages:

1.Excellent thermal stability

2.Works efficiently in pH 6–9 range

3.Fast settling even with high organic content

4.Lower dosage and sludge production

5.Better storage stability in hot climates

Major Production Regions in China

China is one of the largest producers of PAC in the world.
The main high-basicity PAC production bases are located in:

→ Gongyi (Henan Province)

→ Zibo (Shandong Province)

→ Baoding (Hebei Province)

At Gongyi Lvyuan Environmental Technology Co., Ltd., we specialize in spray-dried high-basicity PAC, with adjustable basicity from 60% to 90%, tailored for export to over 30 countries.

Recommended Applications and Regions

FAQ: 

Q1: How can I identify high-basicity PAC?
A: Check the basicity value (B%). Anything above 70% is considered high-basicity PAC.

Q2: Can it be used in cold climates?
A: Yes, though the reaction speed may be slower. Combining with PAM is recommended.

Q3: What’s the difference from standard PAC?
A: Higher flocculation efficiency, better thermal stability, less sludge.

Q4: Where are Chinese high-basicity PAC suppliers located?
A: Mainly in Henan (Gongyi), Shandong (Zibo), and Hebei (Baoding).

Q5: Any storage precautions?
A: Keep sealed and dry, avoid direct sunlight, suitable for long-term storage.

Click the article below to learn more.

1.Thai customers rave about PAC granules

2.How does PAC affect sludge settling efficiency?

3.Why does the water become turbid after adding PAC?