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US 5,372,639 AGranted
Use of a bimodal distribution of scrubs in a process for cooling a hot gaseous suspension
AssigneeE. I. Du Pont de Nemours and Company
InventorsRaul A. Gonzalez, Charles D. Musick
Life of this patent
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Abstract
Disclosed is a process of using a bimodal distribution of scrubs in an externally cooled conduit during heat removal whereby a hot gaseous suspension containing pigmentary metal oxides is subjected to cooling. Effective heat transfer is provided. Pigmentary properties such as CBU and gloss are improved.
Claims8
In a process for cooling a hot gaseous suspension of pigmentary metal oxides by passing the suspension through an externally cooled conduit, the improvement comprising, introducing into the reaction mass a bimodal particle size distribution comprising:
- (a) primary scouring particles having a particle size distribution of from about 30 mesh to about 3 mesh;
- and
- (b) secondary particles having a particle size distribution of from about 100 mesh to about 10 mesh.
Dependencies are inferred from the claim text.