Abstract: The present invention relates to improved flotation composition comprising a mixture of (A) at least one metal salt of a phosphorus acid represented by the Formula: ##STR1## wherein each R.sub.1 is independently a hydrocarbyl, hydrocarbyloxy of hydrocarbylthio group having from 1 to about 18 carbon atoms, each X is independently oxygen or sulfur, and the lowest oxidation state of the metal is plus two, and (B) at least one dithiocarbamate represented by the formula: ##STR2## wherein each R.sub.2 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.2 taken together with R.sub.3 and the nitrogen atom form a five, six or seven member heterocyclic group; each R.sub.3 is independently a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.3 taken together with R.sub.2 and the nitrogen atom form a five, six or seven member heterocyclic group; and R.sub.4 is a hydrocarbylene group having from 1 to about 10 carbon atoms.

Abstract: The present invention relates to improved process for beneficiating an ore-containing sulfide material. In particular, the process is useful for beneficiating ores and recovering metals such as gold, copper, lead, molybdenum, zinc, etc., from the ores. In one embodiment, the process comprises the steps of:(1) forming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is a mixture of (A) at least one metal salt of a phosphorus acid represented by the Formula: ##STR1## wherein each R.sub.1 is independently a hydrocarbyl, hydrocarbyloxy or hydrocarbylthio group having from 1 to about 18 carbon atoms, each X is independently oxygen or sulfur, and the lowest oxidation state of the metal is plus two, and (B) at least one thio compound comprising (i) at least one dithiocarbamate represented by the formula: ##STR2## wherein each R.sub.2 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.2 taken together with R.sub.

Abstract: The present invention relates to improved process for beneficiating an ore-containing sulfide material. In particular, the process is useful for beneficiating ores and recovering metals such as gold, copper, lead, molybedenum, zinc, etc., from the ores. In one embodiment, the process comprises the steps of:(1) forming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is at least one metal salt of a phosphorus acid represented by the Formula: ##STR1## wherein each R.sub.1 is independently a hydrocarbyl, hydrocarbyloxy or hydrocarbylthio group having from 1 to about 18 carbon atoms, each X is independently oxygen or sulfur, and wherein the metal is i) at least one single metal having a lowest oxidation state of plus two or ii) at least one mixture of metals wherein at least one of the metals has a lowest oxidation state of plus two, provided that when the primary mineral is copper, zinc or silver, the metal (i) is other than zinc.

Abstract: The present invention relates to an improved process for beneficiating an ore. In particular, the process is useful for beneficiating ores and recovering metal values such as gold, copper, lead, molybdenum, zinc, etc., from the ores. In one embodiment, the process comprises(A) forming a slurry comprising at least one crushed mineral-containing ore, water and a collector which is at least one carbamate represented by the formula: ##STR1## wherein each R.sub.1 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.1 taken together with R.sub.2 and the nitrogen atom form a five, six or seven member heterocyclic group; each R.sub.2 is independently a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.2 taken together with R.sub.1 and the nitrogen atom form a five, six or seven member heterocyclic group; and R.sub.

Abstract: A fifth wheel assembly for coupling tractor and trailer units includes an improved trunnion bracket, comprising a pair of forged bearing caps having an inverted, U-shaped configuration, with bearing sleeves fixedly mounted therein. In sliding fifth wheel embodiments of the present invention, the bearing caps are mounted on rectangular channels fabricated from two L-shaped channel members with a flat plate attached to the upper edges of the L-shaped channels. An improved plunger is provided for adjustably connecting the trunnioned fifth wheel assembly with a base plate on which slotted racks have been mounted, and comprises a forged, two-prong construction with internal guides which minimizes structural disruption in the channels to provide greater strength. Adjustable stops are mounted on the exterior ends of the plungers, and abut the exterior sides of the racks to accurately maintain the plungers in a locked position.

Abstract: A support for a tilt stabilizing fifth wheel hitch that connects a truck tractor to a trailer, the fifth wheel plate being on a movable frame having a pair of convex shoes connected by a tie rod and resting on concave bearing plates on a fixed frame, the movable frame being movable on the fixed frame toward either of two opposite extreme positions from an intermediate neutral position. The movable frame is biased away from these extreme positions toward the intermediate position by variable force biasing means, preferably coil compression springs on said tie rod, which apply increasing biasing force with increased movement of the movable frame toward one of said extreme positions, thereby enabling the truck driver to "sense" or "feel" the tilted condition of his trailer relative to his tractor during operation.