Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Heterogeneous arrangement
Reexamination Certificate
2009-06-09
2010-10-12
Douyon, Lorna M (Department: 1796)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Heterogeneous arrangement
C510S452000
Reexamination Certificate
active
07811980
ABSTRACT:
The present invention relates to a process for preparing a spray-dried powder comprising (i) anionic detersive surfactant; (ii) from 0 wt % to 10 wt % zeolite builder; (iii) from 0 wt % to 10 wt % phosphate builder; and (iv) optionally from 0 wt % to 15 wt % silicate salt; wherein the process comprises the steps of: (a) forming an alkaline slurry in a mixer, the slurry comprising: (v) from 0 wt % to 15 wt % anionic detersive surfactant; (vi) from 0 wt % to 35 wt % water; and (b) transferring the alkaline slurry from the mixer through at least one pump to a spray pressure nozzle; (c) contacting an acid anionic detersive surfactant precursor to the alkaline slurry after the mixer and before the spray pressure nozzle to form a mixture; (d) spraying the mixture through the spray pressure nozzle into a spray-drying tower; (e) spray-drying the mixture to form a spray-dried powder; and (f) optionally, contacting an alkalinity source with the alkaline slurry and/or the acid anionic detersive surfactant precursor, and/or the mixture.
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PCT International Search Report, dated Feb. 20, 2009—3 pgs, (for EP08159025).
Caldwell Stuart Andrew
Howe Simon
Roberts Nigel Patrick Somerville
Tantawy Hossam Hassan
Douyon Lorna M
Foose Gary J.
The Procter & Gamble & Company
Upite David V.
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