Patent ID: 6261530
Filing Date: 2001-07-17
Classification: C01B,C01F,C01G,C01P,C08K

Abstract:
The process of preparing cationic layer compounds corresponding to general formula (I):[M.sup.(II).sub.x Al(OH).sub.y ](A.sup.n-).sub.z.mH.sub.2 O (I)wherein M.sup.(II) represents at least one divalent metal ion and A.sup.n- represents an acid anion having the charge n-(n=1, 2 or 3) and 1<x<5, y>z, (y+nz)=2x+3 and 0<m<10, comprising adding alkali metal hydroxide to a water-containing mixture of at least one source of divalent metal ions M.sup.(II), one source of the anion A.sup.n- and crystalline aluminum hydroxide in a quantity of 1 to 20 mole-%, based on aluminum hydroxide, heating the mixture for 10 to 240 minutes at a temperature of 100.degree. C. to 240.degree. C., and drying the mixture to form a powder without previous separation of the solid from the aqueous phase.