Process for preparing AlH.sub.3 (PO.sub.4).sub.2 .multidot.3H.su

Details Process for preparing AlH.sub.3 (PO.sub.4).sub.2 .multidot.3H.su Process for preparing AlH.sub.3 (PO.sub.4).sub.2 .multidot.3H.su

1976-07-01

1978-04-11

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423305, 423311, 23301, 23305A, C01B 1516, C01B 2526

Patent

active

040839338

ABSTRACT:
Crystalline AlH.sub.3 (PO.sub.4).sub.2 .multidot.3H.sub.2 O is obtained from an aqueous solution of aluminum phosphate containing a molar ratio of Al.sub.2 O.sub.3 :P.sub.2 O.sub.5 of from 1:2 to 1:6 and an organic solvent that is miscible with water. Crystallization is enhanced by the addition of AlH.sub.3 (PO.sub.4).sub.2 .multidot.3H.sub.2 O seed crystals to the aqueous solution. The product is useful in reducing the setting time of hydraulic binders.

REFERENCES:
patent: 2538867 (1951-01-01), Greger
patent: 3801704 (1974-04-01), Kobayashi et al.
Brosheer et al. Journal of the American Chemical Society 76, p. 5951, 1954.
F. D. Ivoire Bull Chim France, p. 2285 1961.
Industrial and Engineering Chemistry, vol. 53, No. 8 p. 617, 1961.

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