Lithium bromide solutions, vapor pressure

The high solubility of the salt and resultant low water vapor pressure (58) of its aqueous solutions ate usehil ia absorption air conditioning (qv) systems. Lithium bromide absorption air conditioning technology efficiencies can surpass that of reciprocal technology usiag fluorochlorocarbon refrigerants. 

Lithium bromide is used in absorption, refrigeration and air-conditioning systems. A highly concentrated solution of the salt is an efficient absorbent of water vapor. The vapor pressure of such solution is very low. Other applications include the use of the salt as a swelling agent for wool, hair and other organic fibers as a catalyst in dehydrohalogenation reactions and as a sedative and hypnotic in medicine. 

Nasirzadeh K, Neueder R, Kunz W (2005) Vapor pressures, osmotic and activity coefficients of electrolytes in protic solvents at different temperatures. 3. Lithium bromide in 2-propanol. J Solution Chem 34 9-24... 

Data on the two lithium salts which are useful for air dehydration are presented in Table 11-9 and Figures 11-49 and 11-50. As shown in the figures, lithium bromide is considerably more soluble in water, and the saturated solutions of this salt have a lower vapor pressure than lithium chloride solutions at the same temperature and thus can provide a greater degree of dehydration. For most operations, however, the degree of dehydration provided by lithium... 

Hgure 11-49. Vapor pressure of saturated solutions of lithium chloride and bromide. Data of Foote Minerals Company (1956)... 

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