Poly Aluminum Chloride-PAC is a non-toxic and insoluble coagulant which was formulated at the laboratory with an aim to be applicable in different industries such as manufacturing, textile and etc. Its main application is for the treatment of wastewater and drinking water. This substance is produced as an acidic solution meaning that it contains a high concentration of hydrogen ions than water. It is also worth mentioning that PAC is produced in two states: solid and liquid. The solid form is produced as a powder with a color of dark yellow, but the liquid form has a brighter color.
Manufacturing process of Poly Aluminum Chloride
Until now, 3 methods are introduced for the production of Poly Aluminum Chloride. These methods are as follows and third methods are described in more details: 1. Utilizing Bauxite rock 2. Utilizing Aluminum Hydroxide (Al(OH)₃) 3. Utilizing Aluminum Granule
PAC Production by Utilizing Aluminum Granule
PAC Production process consists of 3 steps. It must be noted that PAC is produced in liquid form in all the above methods. For better transfer of the substance and improved safety, the liquid form must be transformed into a solid form (powder). Step 1 : Firstly, the Aluminum solution will be produced by dissolving Aluminum granule into hydrochloric acid. In this process, the acid is recommended to be pre-heated to reach a temperature of 65-70oC. Then, the aluminum granule will be added to the acid slowly. Step 2 : To produce Sodium Aluminate, Aluminum granule must dissolved into 10% -50% Sodium Hydroxide (NaOH). In addition, one must consider a total of 2 hours for both to complete dissolution of Aluminum and Sodium Aluminate production. Step 3 : The last step is the production of Aluminum Oxide with a percentage purity of 29% and alkalinity of 45%. In this regard, the manufacturer will produce diluted Sodium Aluminate by mixing it with water and then adding the diluted Sodium Aluminate into the mixer along with the raw materials.