Method for reprocessing aircraft de-icing agents comprising glycol
AssigneeClariant International Ltd.
InventorAchim Stankowiak
Life of this patent
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Abstract
The present invention relates to a method for reprocessing aircraft de-icing agents comprising glycol, in which (1) the used aircraft de-icing agent, which is possibly contaminated with runway de-icing agents, is collected in a suitable device, (2) the used aircraft de-icing agent collected in this manner is subsequently brought to a glycol content of between 50 and 75% by weight without or after only course prior separation of solid or suspended impurities by expelling water (3) and the concentrate obtained in this manner is separated into a water/glycol mixture and residue by means of a thin-film evaporator, and (4) the water/glycol mixture is collected.
Claims7
A method for reprocessing an aircraft de-icing agent comprising glycol, in which
- (1) a used aircraft de-icing agent, possibly contaminated with runway de-icing agent, is collected in a suitable device,
- (2) the collected used aircraft de-icing agent is subsequently brought to a glycol content between 50 and 75% by weight without, or after only coarse, prior separation off of solid or suspended impurities, by expelling water, to form a concentrate,
- (3) and the obtained concentrate is separated by means of a thin-film evaporator into a water/glycol mixture and a residue, and
- (4) the water/glycol mixture is collected.
Dependencies are inferred from the claim text.