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:
Apr. 25, 1978
Filed:
Mar. 23, 1977
Edward S Martin, Lower Burrell, PA (US);
David A Wohleber, Lower Burrell, PA (US);
Aluminum Company of America, Pittsburgh, PA (US);
Abstract
The production of aluminum chloride from a source material containing both aluminum compounds and silicon compounds such as for example clay is improved by selective use of source materials having a surface area of at least 15 meter.sup.2 /gram; comminution of the source material after dehydration to a particle size of not greater than 0.6 mm (millimeters); and chlorinating the comminuted source material in the presence of a gaseous reducing agent at a temperature of at least 600.degree. C but less than 700.degree. C. This not only improves the rate of chlorination and improves the percentage of aluminum oxide converted to aluminum chloride but also improves the ratio of aluminum chloride to silicon chloride produced, thus producing less silicon chloride byproduct which otherwise must be recirculated to the chlorination reactor or otherwise disposed of.