Process of producing low-dust anionic surfactant concentrates in powder or granule form with improved solubility in aqueous media
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United States of America Patent
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Jul 16, 1996
Grant Date -
N/A
app pub date -
Oct 12, 1994
filing date -
Feb 12, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Anionic surfactant concentrates in the form of solid free-flowing powders and/or granules which may also be present as compounds in admixture with other auxiliaries and/or useful materials suitable for use in detergents and/or cleaning products and which have apparent densities of at least about 150 g/l are produced by hot drying of the water-containing preparations with superheated steam as the drying gas. Preferred apparent densities are above about 200 g/l and are preferably at least about 350 g/l. In addition, the pourable and free-flowing material is preferably in the form of a substantially dust-free material through the presence of dust-binding auxiliaries and/or useful materials and/or by regulation of the residual water content. In one preferred embodiment, the anionic surfactant concentrate is in the form of porous carrier beads with an absorbent porous inner structure.
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