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Electrolytical Properties of Solutions of Lithium Hydroxide at High Temperatures and Pressures

机译：高温高压下氢氧化锂溶液的电解性能

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摘要

This paper presents experimental and calculated data on dissociation constants and specific and molar (limiting) electric conductivity of aqueous and vapor solutions of LiOH at concentrations ranging from 7.24 × 10~(-7) to 3.34 × 10~(-1) mol/kg and temperatures ranging from 298.15 to 646.65 K on the saturation line. To extend the capabilities of estimating the physico-chemical processes at lithium water chemistry under conditions of high temperatures, the graphical dependence of the specific conductivity of aqueous solutions of LiOH on concentration and temperature is given, which shows the advisability of determining concentration from a specific conductivity in the region of a maximum of curves describing the dependence of the specific conductivity on temperature. The values of pH and pOH of solutions of LiOH within the indicated range of concentrations and temperatures have been calculated. It is shown that on dosing LiOH solutions into the boiler water at concentrations from 7.24 × 10~(-7) to 8.7 × 10~(-6) mol/kg the values of pH for LiOH and H_2O are virtually the same at the temperature of 553 K, which scarcely affects the formation of protective lithium-ferrite film. Five relationships for calculating pH at different values of concentration and specific conductivity of LiOH solutions on isotherms ranging from 373.15 to 616.35 K have been worked out.
机译：本文提供了浓度为7.24×10〜（-7）至3.34×10〜（-1）mol / kg的LiOH水溶液的解离常数以及比电导率和摩尔比（极限）电导率的实验和计算数据饱和线上的温度范围为298.15至646.65K。为了扩展在高温条件下锂水化学过程中估算理化过程的能力，给出了LiOH水溶液的比电导率对浓度和温度的图形依赖关系，这表明从特定浓度确定浓度的可取性电导率在曲线最大值的区域内，描述比电导率对温度的依赖性。已计算出指示浓度和温度范围内的LiOH溶液的pH和pOH值。结果表明，在浓度为7.24×10〜（-7）到8.7×10〜（-6）mol / kg的锅炉水中加入LiOH溶液时，LiOH和H_2O的pH值在该温度下几乎相同。 553 K，几乎不影响保护性锂铁氧体膜的形成。得出了计算LiOH溶液在373.15至616.35 K等温线上不同浓度和比电导率下pH值的五个关系。

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