Analysis of Polyaluminum Chloride Types and Uses

Polyaluminum chloride is an inorganic polymeric flocculant. It is widely used in water treatment. Its mechanism of action is to adsorb suspended particles in water through the aluminum hydroxide colloid produced by hydrolysis, causing the impurities in the water to form larger flocculent precipitates, thereby achieving the purpose of purifying the water quality. There are many types of polyaluminum chloride on the market, and different types have different uses.

I. White Polyaluminum Chloride

White polyaluminum chloride is a white or milky white, milk powder-like fine powder made from aluminum hydroxide powder and high-purity hydrochloric acid through spray drying. It is very easy to melt in the air.

1. Its characteristics are as follows:

High alumina content: The content is generally greater than 29.5% 。

Low basicity: Only 50% about.

Low water-insoluble matter: Only 0.1% 。

Pure color: The iron content is extremely low, and the aqueous solution is clear and transparent after the product is dissolved in water, with no color.

Easy to dissolve at low temperatures: It can also dissolve well at low temperatures, and it has the characteristic of low iron content, and can be used for oil-water separation projects.

2. Main uses include:

Water treatment: Widely used in drinking water, industrial water supply, oilfield injection water, circulating cooling water, and various wastewater treatments. It can effectively remove impurities and heavy metal ions from water, improving water quality.

Papermaking industry: It has replaced aluminum sulfate as a neutral sizing precipitant, promoting flocculation and sizing to meet the production needs of high-quality paper, with less system corrosion and easier white water treatment.

Other fields: It can also be used in sugar decolorization clarifying agents, tanning, medicine, cosmetics, and precision casting.

White Polyaluminum Chloride

II. Drinking Water Polyaluminum Chloride

Drinking water polyaluminum chloride is a light yellow powder-like fine powder made from aluminum hydroxide powder and high-purity hydrochloric acid through spray drying.

1. Drinking water polyaluminum chloride has the following characteristics:

High effective ingredient: The alumina content is generally around 29% about, which can better ensure the water purification effect.

Low impurity content: The content of heavy metals and other harmful substances is very low, meeting strict drinking water standards.

Moderate basicity: Usually between 40%-90% , the hydrolysis speed is fast, the floccules are formed quickly and coarsely, the sedimentation performance is good, and it can effectively remove suspended particles and colloidal substances in the water.

Low water-insoluble matter: Generally, the water-insoluble matter content is required to be lower than 0.1% , reducing the impurities remaining in the drinking water and improving the clarity of the water quality.

Wide range of applications: Applicable pH value range is generally 5.0-9.0 , it can exert good coagulation effect within this range, and has strong adaptability to different water qualities.

Good flocculation effect: It can quickly form floccules, and the floccules have good activity and filterability, fast sedimentation speed, and can effectively remove impurities and heavy metal ions in the water, improving water quality.

Low corrosiveness: It has low corrosiveness to equipment and pipelines, extending the service life of equipment and reducing maintenance costs.

2. Its main uses include:

Purification of drinking water: It can effectively remove suspended solids, chroma, odor, heavy metal ions, etc., making the water quality meet the specified drinking water hygiene standards.

Other fields: It also has important applications in paper sizing, dyeing and printing, cement rapid setting agent, precision casting hardener, refractory material binder, glycerol refining, sugar solution refining, wrinkle-resistant fabrics, medicine, cosmetics, etc., and can be used as an auxiliary agent or raw material to improve product quality and production efficiency.

Complies with GB15892-2020 standard

Drinking water polyaluminum chloride - 2020 standard

III. Industrial Grade Polyaluminum Chloride

Industrial grade polyaluminum chloride is a golden yellow powder made by spray drying.

1. Characteristics of Industrial Grade Polyaluminum Chloride

Effective ingredient: The alumina content in industrial grade polyaluminum chloride is generally around 28%.

Basicity and flocculation effect: Basicity is usually 40%-90% , the hydrolysis speed is fast, the floccules are formed quickly and coarsely, the sedimentation performance is good, and it can effectively remove suspended particles and colloidal substances in the water.

Water-insoluble matter content: The water-insoluble matter content is generally below 0.4 % , in industrial water treatment, it can be further removed through subsequent sedimentation and filtration processes to meet the water requirements of different industrial productions. .

Applicable pH range: Applicable pH value range is generally 5-9 , it can exert good coagulation effect within this range, and has strong adaptability to different water qualities. .

Corrosiveness: It has low corrosiveness to equipment and pipelines, which can extend the service life of equipment and reduce maintenance costs. .

2. Uses

Industrial water treatment: It can remove hardness ions from water, reduce scale formation, prevent equipment scaling and corrosion, improve heat exchange efficiency and service life of equipment, ensure the normal operation of industrial production, and is widely used in power, chemical, metallurgical, and papermaking industries. .

Industrial wastewater treatment: Through flocculation and adsorption, organic matter, heavy metals, and other pollutants in wastewater are removed or converted into harmless substances, so that the wastewater meets the discharge standards or reusable standards, achieving the recycling of water resources and reducing environmental pollution.

Complies with GB/T22627-2022 standard

Industrial Grade Polyaluminum Chloride

IV. Polyaluminium chloride general goods

Polyaluminium chloride general goods are dark yellow or dark brown granules processed by drum drying.

1. Product characteristics

Effective ingredients and impurities: The alumina content is generally around 20%-26%.

Basicity and flocculation effect: Basicity is usually 90 or above , the hydrolysis speed is fast, the flocs form quickly and are large, the sedimentation performance is good, and it can effectively remove suspended particles and colloidal substances in the water.

Water-insoluble content: The water-insoluble content is generally high.

Applicable pH range: Applicable pH value range is generally 5-9 , it can exert good coagulation effect within this range, and has strong adaptability to different water qualities.

2. Uses

Industrial wastewater treatment: Widely used in the treatment of various industrial wastewaters such as dyeing, papermaking, leather, oil-containing wastewater, and heavy metal wastewater. Through flocculation and sedimentation, organic matter and heavy metal ions are removed from the wastewater to meet discharge standards or reusable standards.

Municipal wastewater treatment: It can effectively remove suspended solids and organic matter from municipal wastewater, improve water quality, and enable it to meet discharge standards or undergo further advanced treatment.

Industrial water purification: In industrial production, it can be used as a pretreatment agent to remove impurities and hardness ions from raw water, reduce scale formation, prevent equipment scaling and corrosion, improve the heat exchange efficiency and service life of equipment, and provide high-quality water for industrial production.

Polyaluminium chloride general goods