Method for retarding gelation of bicarbonate-carbonate-zeolite-s

Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant

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252174, 25217413, 25217414, 25217419, 25217421, 25217425, 252179, C11D 304, C11D 312, C11D 1102, C11D 1706

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active

043681344

ABSTRACT:
Gelation and setting of desirably miscible and pumpable crutcher slurries comprising sodium carbonate, sodium bicarbonate, zeolite and sodium silicate in an aqueous medium are retarded and often prevented by the addition to such medium of a citric material, such as citric acid and/or water soluble citrate, and magnesium sulfate. Alternatively, magnesium citrate may be employed. The addition of the citric material and magnesium sulfate (or magnesium citrate) appreciably lengthens mixing time available before setting of the mix, increasing it over such times for similar crutcher mixes not containing any anti-gelling material, or including citric material as an anti-gelling component but not incorporating magnesium sulfate. The improved workability of the crutcher mix permits the making of higher solids content crutcher slurries, thereby resulting in significant energy savings and improvements in production rates when the crutcher slurries are subsequently spray dried to free flowing inorganic base bead form, from which commercially acceptable detergent compositions may be made, as by post-spraying with a nonionic synthetic organic detergent in liquid state.

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patent: 4180485 (1979-12-01), Llenado
patent: 4264464 (1981-04-01), Gangwisch

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