The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 1985
Filed:
Apr. 22, 1982
Elmar L Goldsmith, Regina, CA;
PPG Industries Canada, Ltd., Regina, CA;
Abstract
Anti-caking agent is thoroughly distributed upon particulate hygroscopic materials, e.g., particulate inorganic salts such as potassium chloride and sodium chloride, by contacting an agitated stream of the particulate material with an aqueous dispersion of anticaking agent and then passing the treated material through a fluid bed of the treated particulate material. The pretreated particulate hygroscopic material is typically warm, i.e., has a temperature above 25.degree. C., and is cooled in the fluid bed which is fluidized with dehumidified, fluidizing gas having a temperature lower than the treated particulate hygroscopic material entering the bed. Cooled particulate hygroscopic material having a coating of anticaking agent distributed substantially uniformly over the surface of the particles and having a water content substantially the same as the pretreated warm particulate material is removed from the fluid bed.