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    • 4. 发明专利
    • AIR CONDITIONER
    • JPS6321436A
    • 1988-01-29
    • JP16356286
    • 1986-07-14
    • NIPPON MINING CO
    • TAIHICHI MASAAKIMATSUNAMI YASUSHITOMINAGA TSUTOMU
    • F24F11/02
    • PURPOSE:To display an upper limit value of a more probable humidity display when a high humidity measured value is outputted which is not possible with a characteristic of a humidity sensing means by a method wherein a signal outputted from a humidity sensing means is compared with an upper limit value of predetermined humidity and a humidity display instruction signal is adjusted so as to output a lower value. CONSTITUTION:If a value of a variable resistor VR2 is variably adjusted in advance in a humidity display upper limit setting circuit 11 in such a way that an upper limit of digital display of a humidity value displayed and outputted to a display unit 45 becomes 99%, an analogue value becomes an output signal of a humidity display instruction signal adjusting circuit 13 while a value of analogue signal to be inputted from a humidity sensing unit 29 to a comparator circuit 39 is in a humidity range lower than 99%. In turn, when the value of analogue signal exceeds a set value of 99%, the upper display value set by the adjusting circuit 13 in advance is outputted even if a signal indicating a sensed humidity value more than 100% which is not practically possible within a high humidity range is outputted by a humidity sensor.
    • 10. 发明专利
    • PRODUCTION OF PERRHENIC ACID
    • JPS62123020A
    • 1987-06-04
    • JP26262885
    • 1985-11-25
    • NIPPON MINING CO
    • OTO SHUICHITOMINAGA TSUTOMU
    • C01G47/00
    • PURPOSE:To selectively convert impurities in crude rhenium sulfide to sulfides and to easily produce perrhenic acid having high purity, by carrying out oxidative leaching of crude rhenium sulfide and adding H2S to a liquid left after leaching. CONSTITUTION:Crude rhenium sulfide (usually containing 10-40% Re, 0.03-0.08% Mo, 0.01-0.5% B, 2-10% Hg, 0.1-0.3% Cu, 0.01-0.30% Se, 2-10% As and 30-50% S) is subjected to oxidative leaching. The sulfide is oxidized and the liquid is acidified without adding an acidifying agent to enable the leaching under desirable condition. Especially, rapid and complete oxidization can be achieved by the use of H2O2 as the oxidizing agent. H2S is added to the liquid left after leaching and the most part of Hg and Mo existing as impurities are removed in the form of sulfides. The impurities are exclusively sulfidized without sulfidizing Re. Perrhenic acid having high purity can be easily produced by this process.