Aluminium Sulphate Al2(SO4)3

Description: Chemical formula: Al2(SO4)3•18H2O containing Al2O3 17%
Chemical Names: Aluminium sulphate
Other name: alum, papermaker's alum or cake alum
Country of origin: VietNam, Indonesia, China
Packaging details: 50kg/ Package
CAS number: 7784

Status: Available items

Price: Contact

Hồ Chí Minh: 0966801015

Bình Dương: 0906353585

Cần Thơ: 0906353585

Generality
Specifications

Description:
Appearance
Aluminium sulfate is an unknown shape, white or opaque yellow crystalline compound. Aluminium sulfate is a chemical compound with the formula Al2(SO4)3. It is soluble in water and is mainly used as a flocculating agent (it causes suspended impurities to flocculate into larger particles and then settle to the bottom of the container more easily) in the purification of drinking water and waste water treatment plants, and also in paper manufacturing.
Aluminium sulfate is sometimes called papermaker's alum in certain industries. However, the name "alum" is more commonly and properly used for any double sulfate salt with the generic formula AM(SO4)2·12H2O, where A is a monovalent cation such as potassium or ammonium and M is a trivalence metal such as aluminum.

Production:
Aluminium sulphate may be made by adding aluminium hydroxide, Al(OH)3, to sulfuric acid, H2SO4:
2 Al(OH)3 + 3 H2SO4 → Al2(SO4)3 + 6H2O

or by heating aluminum metal in a sulfuric acid solution:
2 Al + 3 H2SO4 → Al2(SO4)3 + 3 H2↑

Application:
Aluminium sulfate is widely used in water purification and as a mordant in dyeing, printing textiles, papemaking industry.... In water purification, this compound is most commonly used as a flocculating agent in VietNam.
- In water treatment : aluminum sulphate is a flocculant that purifying water. When dissolved in a large amount of water, aluminium sulfate produces Al(OH)3. This hydroxide with welldeveloped surface absorbed of suspended particles in water and then settle to the bottom of the container.
- In textile in dustry: the Al(OH)3 produced from aluminum sulphate helps the dye adhere to the clothing fibers by rendering the pigment insoluble.
- In papermaking industry: Aluminum sulphate and salt are mixed to the pulp. Some reactions take place in the mixture and producing a gelatinous precipitate of aluminium hydroxide, Al(OH)3. This hydroxide bonds cellulose fibers together therefore pages will not be smudged with ink in writing processes.

Storage:
Anhydrous aluminium sulfate must be stored in a cool, dry place, away from direct sunlight.

Safety:
It can cause
- Respiratory problems and irritation of the mucous
- Irritation to the skin
- Serious irritation to the eyes
So using Personal Protective Equipments (Protective clothing, safety goggles, gloves, gauze mask goggles...) is essential for chemical exposure.