Process for the preparation of alkali aluminosilicate detergent

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium

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252 89R, 252131, 423328, 423329, C01B 3328, C11D 918

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active

041029771

ABSTRACT:
A detergent builder consisting essentially of an inorganic fine powder composed mainly of an alkali metal aluminosilicate having an X-ray diffraction pattern substantially the same as that of zeolite of the type A and having a degree of crystallization in the range of from 35 to 75%, wherein the inorganic fine powder has a primary particle size smaller than 1 .mu. and a secondary particle size smaller than 4 .mu., the inorganic fine powder has a buffer capacity (S) of at least 132 ml/100 g of solids, the buffer capacity being expressed by an amount of hydrochloric acid necessary for lowering the pH of a 1% aqueous dispersion of said inorganic fine powder from 9.0 to 6.75 when the dispersion is titrated with 0.4N hydrochloric acid at a rate of 20 to 50 ml/hr, and wherein the inorganic fine powder has a calcium ion binding property (C. I.) of at least 70 mg/g as expressed as CaO.

REFERENCES:
patent: 3185544 (1965-05-01), Maher
patent: 3390958 (1968-07-01), Howell
patent: 3393045 (1968-07-01), Maher
patent: 3985669 (1976-10-01), Krummel et al.
patent: 4041135 (1977-09-01), Williams et al.
Sotirova et al., "Chemical Abstracts," vol. 77, 1972, 77363t.

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