Process for the preparation of a mixture of sodium silicates and

Details Process for the preparation of a mixture of sodium silicates and Process for the preparation of a mixture of sodium silicates and

1994-08-05

1996-04-16

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

252 95, 252 99, 25218627, 25218643, 4234152, 423332, C11D 302, C11D 702

Patent

active

055079725

ABSTRACT:
To prepare a mixture of sodium silicates having lamellar structure and sodium carbonate peroxohydrate, sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 is reacted at least partially with carbon dioxide and atomized water with continuous circulation with the formation of a kanemite/sodium hydrogen carbonate mixture. The kanemite/sodium hydrogen carbonate mixture and further sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 is brought into contact with atomized water with continuous circulation. Finally, 0.015 to 1.5 mol of hydrogen peroxide per mole of sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 employed is added to the resulting kanemite/sodium carbonate mixture.

REFERENCES:
patent: 4664839 (1987-04-01), Rieck
patent: 4950310 (1990-08-01), Rieck et al.
patent: 5066415 (1991-11-01), Dany et al.
patent: 5078895 (1992-01-01), Dany et al.
patent: 5266587 (1993-11-01), Sankey et al.
patent: 5294427 (1994-03-01), Sasaki et al.

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