Production process

The PAC 18% production process lines in the batch etching reaction of alumina with an acqueous solution of hydrochloric acid.

The reaction takes place in a glass-lined reactor equipped with internal agitator. During reaction the reactor temperature is controlled and at end of reaction the reaction product is discharged into an holding tank.

The discharged product is maintained in agitation and non reacted alumina and insolubles are separated by filtration.

The clarified product is transferred into vessels where the product is taken to standard specification. To this scope water, hydrochloric acid, aluminium sulphate can be mixed into the product according to market specifications.

A venting system assures the collection of vent discharges for storage tanks and safety valves.

The liquid effluents, mainly acid waters, are collected into a holding tank from which they are recycled to the production plant.

Using sulphuric acid instead of hydrochloric acid, Aluminium sulphate solution (Alum) can be produced with the same process.

The PAC 9 HB, production process is obtained by reaction of PAC 18% with aluminum sulphate and a basifier, using a GFRP reactor and a mixer-mill of particular design.

The reaction is carried out at room conditions and production filtration is not required.

Keywords: water treatment, wastewater treatment, water treatment chemical

Water purifier, water purifying,PAC, polyaluminum chloride

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