Hydrates as a Laboratory Curiosity

FIG u re 1.1 The growth of hydrate-related publications in the twentieth century by decade. (Reproduced from Sloan, E.D., Am. Mineral., 89, 1155 (2004). With permission from the Mineralogy Society of America.) 

I find to be altogether difficult. But whereas water impregnated with fixed air discharges it when it is converted into ice, water impregnated with vitriolic acid air, and then frozen retains it as strongly as ever.  

However, unlike Davy s experiments, Priestley s temperature (17°F) of the gas mixture was below the ice point, so there is no unequivocal evidence that the frozen system was hydrate. There is also no record of validation experiments by Priestley consequently, Davy s independent discovery of chlorine hydrate is generally credited as the first observance. 

Natural gas hydrates were first documented by Sir Humphrey Davy (1811), with these brief comments on chlorine (then called oxymuriatic gas) in the Bakerian lecture to the Royal Society in 1810. 

1946 Deaton and Frost Gas Hydrates and Relation to the Operation of Natural-Gas Pipelines 1959 Katz et al. Water-Flydrocarbon Systems in Handbook of Natural Gas Engineering 1967 Jeffrey and McMullan The Clathrate Hydrates in Progress in Inorganic Chemistry 

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