FDPAC
Polyaluminium chloride, generally known as PAC, is composed of monomeric, oligomeric and polymeric aluminium compounds according to the general formula:
[Al2(OH)6-xClx • y H2O]n mit y ≈ 2x und n = 13–15
The quality of the PACs is characterised by the basicity in %: (1–x/6) • 100% or the molar ratio of OH groups on Al ions.
Example: PAC with the formula [Al2(OH)3Cl3 • 6 H2O]15 is associated with a basicity of 50% and a molar ratio 1,5.
The products manufactured by Feralco are offered in the form of an aqueous, acidic solution. In addition to the standard grades, which are created by pressure digestion procedure, Feralco offers a range of speciality products, the so-called PLUSPAC series.
The standard solutions of polyaluminium chloride, FDPAC, are offered in different concentrations.
Polyaluminium chloride is used primarily as an electrolyte in colloidal systems as coagulant and fixative.
The primary applications are:
- Industrial and municipal wastewater treatment
- Drinking water treatment
- Sludge conditioning
- Elimination of phosphate
- Damping of bulking sludge
- Precipitation for unloading the biological step
- Industrial water treatment
- De-emulsification
- Pulp and Paper industry – sizing / retention / fixing agent
FDPAC should be added with a suitable acid-resistant metering pump directly to the raw water, waste water or material flow. A dilution of the solution before use is not recommended. The dosing should be chosen so that good mixing is ensured. The optimum dosage will be determined individually for each application, e.g. with the help of jar tests. For technical advice the Feralco team is at your disposal.
Suitable for the storage tanks are acid and chloride-resistant materials, such as glass fibre reinforced plastic (FRP) or rubber-coated steel. It is important to ensure that no brass or soft steel connections are used. For piping and valves PVC, glass-reinforced polyester and other acids and chloride resistant materials should be used.
Regular inspection and cleaning of the tank and dosing system is recommended.
For health and safety information, please see our Safety Data Sheets.
The above data are not binding and represent the current state of knowledge. A legally binding assurance of certain properties cannot be derived. Proprietary rights and existing laws and regulations should be followed by the recipient of our products on their own responsibility.