Aluminium sulphate compositions containing polynuclear complexes and process for their manufacture and use

摘要

The present invention relates to a metal sulphate composition comprising a polynucleate metal sulphate having the general formulae [Me(OH)SUBx/SUB(SOSUB4/SUB)SUBy/SUB(HSUB2/SUBO)SUBz/SUB]n where Me is three valence metal ion of the group aluminium and iron n is an integer x is 1.0-2.8; y is 0.1-1.0; x+2y is 3 and z is 1.5-4, z being 4 when the product is in solid form and z being 4 when the product is in solution whereby it has a content of MGSUP2+/SUP, its pH is at least 3.3 and at most 5.0 in liquid form, it has a basicity of at most 2.8, and it contains highly charged cationic polyaluminium complexes, as well as a method for its manufacture, and its use.