Distillation: processes – separatory – Water purification only – Under pressure or vacuum
Patent
1992-08-12
1995-02-14
Lithgow, Thomas M.
Distillation: processes, separatory
Water purification only
Under pressure or vacuum
203 14, 203 22, 203 87, 203 94, 203100, 564497, 423229, B01D 310
Patent
active
053892089
ABSTRACT:
Process for reclaiming or concentrating waste aqueous solutions of gas treating chemicals, such as alkanolamines, used for removing acid components or water vapor from natural gas. The process involves heating the waste solution under a high vacuum to form a vapor and a liquid residue. The temperature and vacuum can be varied to form a vapor consisting mainly of water vapor or a vapor containing both water vapor and vaporized gas treating chemical. The vapor is subsequently condensed or passed through a wash column to produce a concentrated solution. The liquid residue is heated by passing it through a single-pass, generally co-current heater at a rate which avoids localized overheating of a liquid to a temperature above the decomposition temperature of the gas treating chemical. The heated liquid residue is then used to heat the feed waste solution by being thoroughly mixed with it, thus avoiding overheating of the feed solution. The production of corrosive elements and the use of prolonged residence times is avoided so that the apparatus may be made of carbon steel rather than more expensive stainless steel.
REFERENCES:
patent: 4315815 (1982-02-01), Gearhart
patent: 4770747 (1988-09-01), Muller
patent: 5152887 (1992-10-01), Beasley et al.
Beasley Todd
Merritt Dwight A.
Canadian Chemical Reclaiming Ltd.
Lithgow Thomas M.
LandOfFree
Process for reclaiming and/or concentrating waste aqueous soluti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for reclaiming and/or concentrating waste aqueous soluti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for reclaiming and/or concentrating waste aqueous soluti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-284894