Drying and gas or vapor contact with solids – Process – Congealing or thickening
Reexamination Certificate
2005-06-07
2005-06-07
Gravini, Stephen (Department: 3749)
Drying and gas or vapor contact with solids
Process
Congealing or thickening
C034S347000, C034S384000, C034S391000, C034S401000, C051S307000
Reexamination Certificate
active
06901684
ABSTRACT:
This invention is a method for producing a cerium-based abrasive which includes: a step of grinding raw material for the cerium-based abrasive; a step of roasting the ground raw material; and a step of subjecting the roasted raw material to wet processing, the method being characterized in that it further includes a lower-temperature re-roasting step of heating the wet-processed raw material at 200 to 700° C. In the invention disclosed in this application, an abrasive with particularly preferable properties can be produced by fully drying the wet-processed raw material in a drying step, and subsequently subjecting the dried raw material to the lower-temperature re-roasting step.
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Ito Terunori
Nakashima Yuki
Uchino Yoshitsugu
Ushiyama Kazuya
Gravini Stephen
Mitsui Mining & Smelting Co. Ltd.
Rothwell Figg Ernst & Manbeck P.C.
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