Aluminum Chlorohydrate, abbreviated as ACH. Our company exclusively develops and mass-produces high-performance inorganic salt flocculants ACH, which are synthesized by reacting hydrochloric acid and aluminum ingots in a special device. Among the current aluminum salt products, ACH has absolute advantages, covering all the functions of other aluminum salts, and has unique effects that other aluminum salts do not possess.
About Aluminum Chlorohydrate picture
Here are the detailed product characteristics and advantages of ACH:
      The ACH solution features the highest aluminum content of 23% Al2O3 (w/w) among any aluminum products based on solutions in the market. The 83% basicity of ACH is also the highest among aluminum salts based on available solutions. Basicity (alkalinity) refers to the degree of acid neutralization and represents the degree of polymerization of ACH. The high-polymerized aluminum substances in ACH have a higher cationic charge than standard aluminum salts such as alum or aluminum chloride, or even other polyaluminum products. Therefore, ACH can provide higher-level performance and reduce the overall dosage. The high basicity also means that the pH effect can be minimal when applying ACH. Compared with traditional metal salts and low-basicity polyaluminum chloride, ACH can effectively flocculate in a broader pH range (up to 9.5).
Applications and advantages:
  1. Municipal and industrial water treatment: ACH solution is usually applied as the main flocculant in drinking water and industrial wastewater treatment plants, replacing the need for other flocculants such as alum, and in many cases, eliminating or greatly reducing the need for chemicals that adjust pH, such as coagulants and filter aids. ACH is often used in environments where the liquid’s pH is greater than 7.5.

The recognized benefits of switching to ACH solution are:

  • Improved turbidity removal capability
  • Improved color removal capability
  • Enhanced removal of Total Organic Carbon (TOC)
  • Reduced filtration turbidity
  • Improved filtration efficiency
  • Over 50% reduction in sediment
  • Simplified operation, eliminating the need for some pH adjustments and secondary polyelectrolyte additions
  • Reduced overall treatment costs
  1. Municipal and industrial wastewater treatment:
      ACH can also be used in wastewater treatment applications for:
  • Total Suspended Solids (TSS) removal
  • Heavy metal removal
  • Phosphorus removal
  • Chemical Oxygen Demand (COD) reduction in industrial wastewater treatment
  • Removal of Biological Oxygen Demand (BOD) and Total Organic Carbon (TOC) in municipal wastewater treatment
  1. Pulp and paper manufacturing applications:
       ACH solution can also be used in some mechanical applications, such as:
  • Sizing adhesives
  • Anionic trash removal agents
  • Retention and filtration aids
  • Resin barrier control additives
  • Neutral sizing precipitants in the paper industry
  1. Antiperspirant raw materials:
       Cosmetic-grade ACH is commonly used as a raw material in antiperspirants.

Advantages of ACH compared to PAC

1.Specifications:
Index Name
PAC Index
ACH index
liquid
solid
liquid
solid
Mass fraction of aluminum oxide (Al₂O₃)(w/w)%≥
10
29
23
46
Basicity ％
40-90
75-90
Density (20℃)/(g/cm³)                ≥
1.12
/
1.33
/
Mass fraction of insoluble substances ％                   ≤
0.2
0.6
0.01
0.02
pH value (10g/L aqueous solution)
3.5-5.0
3.5-5.0
Mass fraction of arsenic (As)%                  ≤
0.0002
0.0001
Mass fraction of lead (Pb)%                  ≤
0.001
0.0005
Mass fraction of cadmium (Cd)%                  ≤
0.0002
0.0001
Mass fraction of mercury (Hg)%                  ≤
0.00001
0.00001
Mass fraction of hexavalent chromium (Cr6+)%             ≤
0.0005
0.0005
Mass fraction of iron (Fe)%              ≤
No requirement
0.01
0.02
      It can be seen that the specifications required for ACH are much higher than those for PAC.
2. Dosage comparison:
      Due to the highest aluminum content and basicity of ACH solution among aluminum salt products, its dosage is the smallest among all aluminum salt solutions when treating raw water with the same turbidity within a certain range. As shown in the figure.
3. Water Treatment Effect
       The water treated with ACH has better turbidity and residual aluminum levels compared to PAC and aluminum sulfate. As shown in the figure (data from a Malaysian water treatment plant, where PAC Type3 refers to ACH), some residual aluminum was not detected in the water treated with ACH, and in some cases, the levels of residual aluminum were significantly reduced. Other residual substances were also very low.
Sample Description
Raw
1
2
3
4
5
6
7
8
9
10
Sample Volume(ml)
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
InitialpH
4.84
4.84
4.84
4.84
4.84
4.84
4.84
4.84
4.84
4.84
Soda(ppm)
8
8
8
8
8
8
Coagulant:
Alum.ppm
20
22
24
26
28
30
PAC Type3,ppm
3
6
9
12
Supernatant Water Quality:
Turbidity(NTU)
1.97
0.51
0.51
0.29
0.26
0.28
0.32
1.22
0.89
0.21
0.81
Aluminum,Al(mg/L)
0.065
0.117
0.095
0.089
0.097
0.132
0.168
0
0
0
0
Iron,Fe(mg/L)
0.71
.
—
—
.
.
.
0.03
0.01
0.01
0.01
Manganese,Mn(mg/L)
0.021
.
—
—
▼
▼
—
0.011
0.011
0.009
0.009
Sample water source:Tenglu
Description
Raw
1
2
3
4
5
6
Sample Volume(ml)
1000
1000
1000
1000
1000
1000
Pre-Soda,ppm
10
10
10
10
10
10
Coagulant:
ACH.ppm
16
18
20
PAC,ppm
16
18
20
Supernatant Water
Quality:
Turbidity(NTU)
1.98
0.34
0.35
0.44
0.65
2.60
2.99
pH
4.97
6.39
6.18
6.35
5.90
6.30
5.68
Colour(Haz)
168
36
27
15
13
33
40
Fc(mg/L)
1.39
0.27
0.30
0.15
0.23
0.62
0.68
Mn(mg/L)
0.023
0.011
0.020
0.013
0.018
0.027
0.025
Al(mg/L)
0.140
0.036
0.074
0.033
0.068
0.139
0.162
NH₃(mg/L)
0.07
0.04
0.05
0.04
0.03
0.04
0.04

We know that residual aluminum is an important indicator in the effluent of water treatment plants. Aluminum is not easily absorbed and eliminated by the human body and can accumulate, leading to aluminum poisoning. This is one of the important reasons why foreign countries choose to use ACH. ACH can significantly reduce residual aluminum content compared to PAC, effectively improving the water quality of our drinking water.

4. Other Product Advantages:

       ACH is not a hazardous material and has no corrosiveness, while PAC has a stronger acidity and some corrosiveness. The product is stable and can be stored for a long time. PAC cannot be left standing for a long time as it will produce a lot of sediment.

In summary, ACH is currently an irreplaceable and absolute advantage product among aluminum salt products, making it the best choice for high-end customers.