Method of regenerating alcohol-based antifreezing liquid

Details Method of regenerating alcohol-based antifreezing liquid Method of regenerating alcohol-based antifreezing liquid

1986-12-31

1988-05-10

Bascomb, Wilbur

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating feed

203 18, 203 19, 203 40, 203 49, 203 87, 203DIG19, 62 64, 202175, 202180, 202186, 202197, 202198, 426524, 568916, B01D 302, C07C 2980

Patent

active

047433434

ABSTRACT:
This invention relates to a method of regenerating an alcohol-based antifreezing liquid, and more particularly to a method of concentrating and regenerating an alcohol-based antifreezing liquid diluted through water absorption by removing water therefrom.
The antifreezing liquid containing water is introduced into an evaporation vessel. The liquid is then heated to a temperature at which components other than alcohol of the liquid are unlikely to be affected in their properties while air is fed thereinto. Thus alcohol and water vapors are generated. These vapors are first cooled to a temperature at which only water is condensed. After water is removed, cooling is effected at a lower temperature. At this stage, the alcohol vapor is condensed, and thus concentrated alcohol, almost water-free, is collected.
The alcohol thus collected and nonfreezing and high boiling-point components other than alcohol in the evaporation vessel are again mixed into a concentrated antifreezing liquid.

REFERENCES:
patent: 1490520 (1924-04-01), Steffens
patent: 1833717 (1931-11-01), Laird
patent: 3361649 (1968-01-01), Karter
patent: 4303478 (1981-12-01), Field
patent: 4305790 (1981-12-01), Kramer
patent: 4327184 (1982-04-01), Johnson et al.
patent: 4344828 (1982-08-01), Melton
patent: 4347321 (1982-08-01), Lionelle et al.
patent: 4601909 (1986-07-01), Nagoshi

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