Patent ID: 7138071

Claim:
A process for producing a deicing and/or anti-icing agent, said process comprising upgrading a prior use stream containing a glycol, glycerol, sorbitol, methyl glucoside or mixtures thereof, said stream being recovered from prior use as aircraft deicing and/or anti-icing fluids, engine radiator fluids, and/or gas dehydration fluids, wherein said upgrading comprises adding an effective amount of at least one of the following upgrading agents for deicing and/or anti-icing: i) an upgrading agent comprising one or more hydroxyl-containing organic compounds selected from the group consisting of hydrocarbyl aldosides, sorbitol, maltitol, monosaccharides, propylene glycol, ethylene glycol, glycerol and mixtures thereof; ii) an upgrading agent comprising one or more organic acid salts selected from the group consisting of a carbonic acid salt, a C 1 –C 4 carboxylic acid salt, a hydroxycarboxylic acid salt, a dicarboxylic acid salt and mixtures thereof; iii) an upgrading agent comprising one or more inorganic salts; iv) an upgrading agent added to adjust the pH to slightly basic; or v) mixtures of any of the foregoing.