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:
Jun. 28, 1983
Filed:
Feb. 22, 1982
Clifford E Loehr, Norton, OH (US);
Roger A Crawford, Wadsworth, OH (US);
John E Carbaugh, Akron, OH (US);
Cletus N Welch, Clinton, OH (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
A continuous integrated process for the production of neutral calcium hypochlorite in which crystals of by-product sodium chloride are more easily separated from the calcium hypochlorite product is described. The process includes diluting an aqueous slurry of sodium hydroxide, lime and bleach mother liquor with aqueous salt solution saturated with calcium ion and sodium chloride and chlorinating the resulting aqueous admixture in the presence of a seed bed of sodium chloride crystals and calcium hypochlorite crystals at temperatures less than 35.degree. C., e.g., 15.degree.-20.degree. C. A suspension of readily separable, sodium chloride crystals and calcium hypochlorite crystals in chlorinator liquor is conveyed to a classification zone where the sodium chloride and calcium hypochlorite crystals are separated.