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Spray-drying detergent compositions

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TLDR
In this paper, a spray-drying method for large volumes of detergent slurry in a spraydrying tower is described, which comprises spraying at least a portion of the slurry, cocurrently with air having a specified temperature and velocity range, through uniformly spaced atomizing nozzles into a cylindrically shaped drying zone.
Abstract
A method is provided for spray-drying large volumes of a detergent slurry in a spray-drying tower which comprises spraying at least a portion of the slurry, cocurrently with air having a specified temperature and velocity range, through uniformly spaced atomizing nozzles into a cylindrically shaped drying zone. Any remaining balance of the slurry is sprayed countercurrently into the drying zone at higher levels in the spray tower. Apparatus is provided for practicing this process. Granular detergent compositions having improved physical properties are also disclosed.

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References
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Multilevel spray-drying method

TL;DR: In this paper, a method for spray-drying large volumes of a synthetic detergent slurry which comprises spraying the slurry into the spraydrying chamber in at least two different levels of uniformly spaced atomizing nozzles is provided.
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