Oxygen removal from gas with phosphine manganous halide complex - using predried gas to prevent deactivation of complex by water

    公开(公告)号:DE2927734A1

    公开(公告)日:1981-02-05

    申请号:DE2927734

    申请日:1979-07-10

    Applicant: BASF AG

    Abstract: In the removal and opt. recovery of O2 from gas by treatment with phosphine complexes with Mn (II) halides, the gas, if moist, is predried. Drying prevents an irreversible change, so that the complex retains a large fraction of its activity and can be used for continuous exchange. The complexes are useful for sepg. O2 from air in confined spaces, e.g. ships and aircraft, for removing traces of O2 from gases and esp. as detectors for the O2 content of gases, since they are intensely coloured when combined with O2 and colourless to pale yellow when free from O2. In an example, air was passed into 10 g 9 wt.% soln. of the dimethylphenylphosphine-Mn (II) bromide complex in THF at 20 deg.C and normal pressure. The soln. was yellowish initially and became intensely coloured very rapidly. If 2 ml water were added, the colour disappeared immediately and the O2 binding complex was destroyed. If O2 was introduced again, it was no longer bound. If 60 ml BuOH were added, the complex was destroyed within 15 min.

    Long term solar heated water store - uses two water layers separated by thin light permeable plate or film

    公开(公告)号:DE2717709A1

    公开(公告)日:1978-10-26

    申请号:DE2717709

    申请日:1977-04-21

    Applicant: BASF AG

    Abstract: The process for collecting and long-term storage of solar energy in water, uses two separate zones, positioned above each other. Solar energy is gathered in the base or in the lower water layer by absorption, the water being heated. The lower water layer is separated from the upper one by a light-permeable foil or plate. The upper water layer is thickened by natural or synthetic polymers, for thermal light-permeable insulation of the lower layer upwards. Absorption in the lower layer is improved by using a black foil at its base, or by dying the water.

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