De-icing chemicals and their preparation from polysaccharide...

Details De-icing chemicals and their preparation from polysaccharide... De-icing chemicals and their preparation from polysaccharide...

C - Chemistry, Metallurgy

09

K

31/80

C09K 3/18 (2006.01)

Patent

CA 1178802

Abatract De-icing chemicals intended primarily for de-icing pavement such as roads, bridges, and runways are prepared from polysaccharide sources (e.g. waste products such as sawdust) by reaction at elevated pressure and temperature with alkaline earth metal oxides or hydroxides in the presence of water. The de-icing chemicals are impure mixtures of alkaline earth metal salts of acetic acid, lactic acid and glycolic acid with the mixture being sub- stantially free of alkaline earth metal salts of oxalic acid and formic acid. The de-icing chemicals are intended to be a substitute for the inorganic chloride salts (e.g. sodium chloride) commonly used for de-icing highways.

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