Project Report on Poly Aluminium Chloride EIRI1018

Aluminium  chloride  hydroxide  [1327-41-9],  [10284-64-7],  Alcl (OH)2   [14215-15-7],  AlCl2(OH),  produts,  commonly  known   as polyaluminium  chlorides  (PAC), are used for a wide  variety  of industrial applications. Other names for PAC are basic  aluminium chloride,polybasic aluminium chloride, aluminium hydroxychloride, aluminium  oxychloride and aluminium chlorohydrate. The  presence of  polymeric, aluminium-containing cations, the distribution  of which  can  differ greatly, typifies PAC products.  Although  the formation  of polynuclear aluminium species in solution has  been studied  for  over  a centary, there is  still  much  controversy concerning  aluminium polymerization reactions and the  resulting product  compositions.  Polyaluminium  chloride  is  a  partially hydrolyzed aluminium chloride solution, which may incorporate   a  small  amount of sulphate, has been introduced in Japan,  England and Australia as an alternative to alum. Known as  poly(aluminium chloride) or poly (aluminium hydroxy chloride is a member of  the family  of  basic  aluminium   chlorides.  These  are   partially neutralized hydrates having the formula. Al2Cl6-x(OH)x.6H2O Where x  =  1.5.  Polyaluminum    chloride   (PAC)   is   also   called   Aluminium   chloride   Hydroxide  [1327-11-9].   Poly   (aluminum  chloride),  PAC,  has also an approximate empirical  formula.  Al (OH)1.5 (SO4)0.125 Cl1.25 and is available as a solution with  an aluminium  content of 10 wt% expressed as Al2O3. It is   an  all-effective coagulant. It is reputed to provide faster flocculation and  stronger flocs than alum in some applications.