For many decades now aluminium sulfate, or alum, has been the standard raw material of the water treatment industry. Its large molecular size and weight, combined with low cost, make it an excellent flocculant for the treatment of both drinking water and industrial waste water.
In addition to water treatment, aluminium sulfate finds use in a diversity of other areas including construction products, oil and fat processing, and paper manufacturing.
Alum is a white crystalline product. It has many trade names including "pearl alum", "pickle alum", "papermakers’ alum" etc. It is produced from the treatment of aluminium hydroxide with sulfuric acid. Its most common chemical formula is Al2(SO4)3.18H2O.
To competitively produce a high quality alum it is important to have total control over major raw materials. The most important raw material for alum production is the aluminium hydroxide, as this determines the impurities in the alum produced. With its regional offices in Indonesia, Malaysia, Singapore and Thailand, Bisley is the largest supplier of aluminium hydroxide into South East Asia. The ready availability of sulfuric acid in this region ensures our ability to supply high quality alum at very competitive prices. It also allows fast and efficient shipping to most corners of the world.
Aluminium sulfate can be supplied in a range of particle sizes to suit customers' requirements. Typical ranges are as follows:
- Lump 5 - 50 mm
- Granules 1 - 5 mm
- Powder <1 mm
Bisley offers packaged aluminium sulfate from its South East Asian distribution centres and in Australia. These centres are currently located in Jakarta and Surabaya (Indonesia), Penang (Malaysia) and Bangkok. Currently, packaged aluminium sulfate is available in the following forms:
- 25 kg woven polypropylene bags
- 1 metric tonne bulk bags