Abstract:
An umbrella for a wheelchair comprises an operating unit; an expansion unit; and an umbrella unit. The operating unit is fixed on the arm of a wheelchair to be rotatable. The expansion unit is fixed on the back of the wheelchair and extends to the upper side of a wheelchair user. At the end of the extension unit, a rotating unit which rotates in the same direction of the operation by the operating unit is fixed. The umbrella unit blocks rain by being fixed on the rotating unit to be detachable.
Abstract:
PURPOSE: A manufacturing method of the alumina immersion cobalt for deep desulfurizaion and/or nickel-molybdenum sulfide catalyst is provided to manufacture the alumina immersion molybdenum sulfide catalyst for deep desulfurization which has excellent desulfurization performance by immersing after dispersing cobalt and/or nickel-molybdenum sulfide on the alumina carrier. CONSTITUTION: The manufacturing method of the alumina immersion cobalt for deep desulfurizaion and/or nickel-molybdenum sulfide catalyst includes the steps of: dissolving the sulfur in the organic solvent; putting molybdenum hexacarbonyl and gamma alumina into the sulfur - organic solvent solution; immersing the molybdenum sulfide in the alumina by adding ultrasonic wave; impregnating by melting cobalt and/or the nickel precursor in the solvent in the alumina in which the molybdenum sulfide is immersed; manufacturing the cobalt and/or the nickel - molybdenum sulfide catalyst by heat -treating under the temperature of 400°C; reacting the alumina in which the cobalt and/or the nickel molybdenum sulfide is immersed with the sulfurization agent in the hydrogen of the high pressure; sulfurizing the cobalt and/or the nickel.