過酸化水素(H₂O₂)の気液平衡値の実測は文献が極めて少い.Giguere及びMaassが著者等の見出した殆ど唯一の文献であつた.こゝでは40mmHgの減圧下に於て行つた平衡蒸溜の結果からH₂O₂-H₂O系の全域に亘つて大体信用し得べき気液平衡値を得たので報告する次第である.

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A series of rectificat on tests on the methanol-water, ethanol-water, benzene-toluene, and carbontetrachloride-toluene mixtures were performed in a wetted-wall tower.
The wetted-wall tower used was a glass tube, 22mm in inside diameter and 1010mm in length. Vapor from the electrically heated kettle rose up through the tower, and mass transfer took place between vapor and reflux, which flowed in layer form down the inner wall of the tower. Part of the vapor from the tower was condensed in the partial condenser directly coupled to the tower, and admitted to the tower as reflux at its boiling point. The remainder of the vapor was condensed in the total condenser and fed back to the kettle. The equipment was operated as a closed system. The tower and the lower part of the partial condenser were enclosed in heater jackets to minimize heat losses.
Vapor flow was varied considerably by adjustment of the power input to the kettle, and reflux rates were controlled by cooling water supply to the partial condenser. Rates of vapor flow were determined by direct measurement of reflux liquid from the tower and distillate for a 30-second period. The compositions of liquid and vapor were varied over wide range. Analyses were made on the distillate and the reflux at the top and bottom. Vapor compositions were obtained by calculation.
The experimental results in turbulent flow showed that the overall coefficient of mass transfer K_y [kg-mol/m². hr. Δy], based on the vapor compesition differences as driving forces, was affected mainly by the velocity of vapor, and was independent of the rate and compesition of reflux or the slope of equilibrium curve. For a given system, K_y was proportional to the 0.8 power of the mass velocity G or Reynolds number Re of vapor; and at the same value of G, K_y was proportional approximately to the 3/4 power of the molal vapor diffusivity D_m of the mixture.
The data could be correlated by the following equation:
where d=inside diameter of tower;
X=effective total vapor film thickness;
k_y=vapor film coefficient of mass transfer;
Dm=in the brackets in kg-mol/m. hr.
For vapor mixtures, whose viscosity was in the vicinity of 0.01 centipoiscs, the following approximate equation could also be used:
where, k_y in kg-mol/m². hr. Δy, G in kg/m². hr, Dm in kg-mol/m. hr, and d in m.
The experimental data were w thin ±15% of these equations.

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茲に報告する實驗は,昭和19年の暮から昭和20年3月上旬迄の期間に行つたものである.当時の事情として不充分の箇所はあるが,ひとまず纒めて報告する次第である.本研究は輝焔の輻射を求めるのが目的であるため,まず焔よりの輻射量の絶対量を求めた.⁽²²⁾バーナー径は1, 2, 5, 7,及び10mm.を使用し,夫々の場合につき,「ガス」流量を変えて輻射量を測定し,更にCO₂を6%, 8%, 10%燃料「ガス」に添加して同様の測定を繰返し,炭化水素の影響を檢した.その結果,炭化水素の添加の%に從い輻射量は略併行的に増加することを認めた.更に輻射有效温度を推定し,炭化水素の分圧,及び平均炭素原子数を知る時,任意の径の「バーナー」について任意の流量に対する輝焔黒度を求める式を導いた.⁽²³⁾

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