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Our purpose in this paper is to review present molybdenum recovery processes from a historical viewpoint and to point out areas where research should be concentrated. As in many mineral deposits, ore grades of molybdenite are trending toward lower values and substantially different grade-recovery economics are likely to occur. We suggest that closer examination of the relationship between mineral beneficiation by physical means (gravity and flotation) and chemical means (roasting and leaching) might result in greater overall recovery of valuable materials at competitive economics. We hope to stimulate thinking along these lines.