NOVEL ZINC-CONTAINING CALCIUM-ALUMINIUM DOUBLE SALTS Russian patent published in 2012 - IPC C01G9/00 C08K3/20 C08K3/24 C08K3/26 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry. A neutral calcium-aluminium double salt has the formula Ca_2m(Zn_2n)Al₂(OH)_6+2(2m+2n-i)An * oH₂O, where m and n assume the following values: m=0.5-3 and 0.5m≥n>0; An=CO₃, where that group can be substituted completely or partially with at least one of the following groups selected from OH, ClO₄, and o=0-3. This salt is obtained by reaction at step a) CaO or Ca(OH)₂, ZnO or Zn(OH)_a and Al(OH)₃ in an aqueous suspension and adding CO₂ or carbonate or bicarbonate of an alkali metal at temperature from 10 to 100°C. Reaction of the product obtained at step (a) with perchloric acid is possible. Double salts on which alkali metal perchlorates are deposited in liquid form are used as adsorbates. The double salts are used as additives for polyolefins as antipyrenes/smoke suppressors or filler material and for immobilising enzymes.

EFFECT: invention enables to obtain novel double salts.

8 cl, 2 tbl, 3 ex