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Fundamental Studies on the Removal of Emulsified Oil by Chemical Flocculation DON E. BLOODGOOD Professor of Sanitary Engineering WILLIAM J. KELLEHER Graduate Research Assistant Purdue University, W. Lafayette, Indiana The National Lime Association is at the present time sponsoring research at Purdue University with the viewpoint in mind of finding uses for lime in the treatment and disposal of oil wastes. A rather extensive survey of the literature concerning oil wastes indicated that a major problem is caused by the presence of emulsified oil in waste waters from refineries and metalworking plants. The survey of the literature further indicated that chemical flocculation has proven successful in some cases for treating wastes containing emulsified oil. It was thought that since chemical flocculation will often involve the use of lime, basic laboratory studies on the chemical flocculation of oil emulsions would prove of benefit. There does not seem to be too much known about this subject. Before discussing the laboratory studies that were made, it would perhaps be best to briefly review the subjects of emulsions and chemical flocculation. An emulsion may be defined as a mixture of two immiscible liquids, one of the liquids being dispersed throughout the other in the form of very fine droplets. If oil is dispersed throughout water the result is an oil-in-water emulsion (o/w), or if the water is dispersed throughout the oil the result is a water-in-oil emulsion (w/o). For most emulsions there is a third constituent necessary, that being an emulsifying agent which is adsorbed on the surface of the emulsified particles rendering the emulsion stable. It is possible to have pure o/w emulsions; these are known as oil hydrosols because the diameter of the emulsified particles are in the range of 10"5 centimeters. The stability of oil hydrosols is believed to be caused by the preferential adsorption of hydroxyl ions with a resulting negative charge on each of the dispersed oil droplets. The type of emulsifying agent that stabilizes the emulsion is probably the most important property as far as the stability of emulsions is concerned. Sutheim (1) has given an excellent classification as to the 361
Object Description
Purdue Identification Number | ETRIWC195235 |
Title | Fundamental studies on the removal of emulsified oil by chemical flocculation |
Author |
Bloodgood, Don E. Kelleher, William J. |
Date of Original | 1952 |
Conference Title | Proceedings of the seventh Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/engext&CISOPTR=2072&REC=5 |
Extent of Original | p. 361-374 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2008-09-22 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 361 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Fundamental Studies on the Removal of Emulsified Oil by Chemical Flocculation DON E. BLOODGOOD Professor of Sanitary Engineering WILLIAM J. KELLEHER Graduate Research Assistant Purdue University, W. Lafayette, Indiana The National Lime Association is at the present time sponsoring research at Purdue University with the viewpoint in mind of finding uses for lime in the treatment and disposal of oil wastes. A rather extensive survey of the literature concerning oil wastes indicated that a major problem is caused by the presence of emulsified oil in waste waters from refineries and metalworking plants. The survey of the literature further indicated that chemical flocculation has proven successful in some cases for treating wastes containing emulsified oil. It was thought that since chemical flocculation will often involve the use of lime, basic laboratory studies on the chemical flocculation of oil emulsions would prove of benefit. There does not seem to be too much known about this subject. Before discussing the laboratory studies that were made, it would perhaps be best to briefly review the subjects of emulsions and chemical flocculation. An emulsion may be defined as a mixture of two immiscible liquids, one of the liquids being dispersed throughout the other in the form of very fine droplets. If oil is dispersed throughout water the result is an oil-in-water emulsion (o/w), or if the water is dispersed throughout the oil the result is a water-in-oil emulsion (w/o). For most emulsions there is a third constituent necessary, that being an emulsifying agent which is adsorbed on the surface of the emulsified particles rendering the emulsion stable. It is possible to have pure o/w emulsions; these are known as oil hydrosols because the diameter of the emulsified particles are in the range of 10"5 centimeters. The stability of oil hydrosols is believed to be caused by the preferential adsorption of hydroxyl ions with a resulting negative charge on each of the dispersed oil droplets. The type of emulsifying agent that stabilizes the emulsion is probably the most important property as far as the stability of emulsions is concerned. Sutheim (1) has given an excellent classification as to the 361 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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