| 摘要 |
The present invention relates to a method for producing sulphate-poor, polynucleate aluminium hydroxide sulphate complexes of the general formula [Al(OH)x (SO4)y (H2O)z] n where n is an integer, x is 0.75-2.0; y is 0.5-1.12; x + 2y = 3, z = 1.5-4, when the product is in solid form, and z is @ 4, when the product is in the form of a solution. The method is characterised by producing a solution containing polynucelate aluminium hydroxide sulphate complex of the formula Alm(OH)n<(3m-n)+> by alkalizing aluminium sulphate with NaOH or Na2CO3, the solution being cooled to crystallize out Na2SO4 . 10 H2O, and the crystals separated from the residual solution. |
