Spray-drying process
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United States of America Patent
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May 7, 2013
Grant Date -
Jun 23, 2011
app pub date -
Dec 15, 2010
filing date -
Dec 18, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A process for preparing a spray-dried detergent powder having: (i) detersive surfactant; and (ii) other detergent ingredients; wherein the process includes the steps of: (a) forming an aqueous detergent slurry in a mixer; (b) transferring the aqueous detergent slurry from the mixer to a pipe leading through a first pump and then through a second pump to a spray nozzle; (c) contacting a detergent ingredient to the aqueous detergent slurry in the pipe after the first pump and before the second pump to form a mixture; (d) spraying the mixture through the spray nozzle into a spray-drying tower; and (e) spray-drying the mixture to form a spray-dried powder, wherein the pressure drop between (i) the pressure in the pipe at the outlet of the first pump to (ii) the pressure in the pipe at the inlet to the second pump is less than 8×105 Pa.
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