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Title: US5656173: Method of removing dispersed oil from an oil in water emulsion employing aerated solutions within a coalescing media
[ Derwent Title ]

Country: US United States of America

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17 pages

Inventor: Jordan, James Michael; Tulsa, OK
Denton, Thomas James; Houston, TX

Assignee: National Tank Company, Houston, TX
other patents from NATIONAL TANK COMPANY (394175) (approx. 19)
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Published / Filed: 1997-08-12 / 1996-03-05

Application Number: US1996000611413

IPC Code: Advanced: B01D 17/02; B01D 17/035; B01D 17/04; C02F 1/24; C02F 1/28; C02F 1/40;
Subclass: C02F;
B01D 17/28
B01D 17/35;
C02F 1/24;
C02F 1/28;

ECLA Code: B03D1/14D; B01D17/02D; B03D1/24; C02F1/24; M02F1/40; M02F101/32; M02F101/32E;

U.S. Class: Current: 210/703; 210/221.2; 210/521; 210/708; 210/712; 210/802; 210/804; 210/DIG.005;
Original: 210/703; 210/708; 210/712; 210/802; 210/804; 210/221.2; 210/521; 210/DIG.5;

Field of Search: 210/703,708,802,804,221.2,259,521,522,DIG. 5,712

Priority Number:
1996-03-05  US1996000611413

Abstract:     A method of removing dispersed oil from an oil in water emulsion is accomplished by the steps of dissolving gas in water to form an aerated solution, introducing the emulsion and aerated solution into a treatment vessel in which is positioned a coalescing media formed by an assembly of closely spaced corrugated plates of oleophilic material, the emulsion and aerated solution passing in contact with the plates to cause oil droplets to coalescence on the plates and small gas bubbles carried with the aerated solution to adhere to the oil droplets to increase the buoyancy of the oil droplets so that the oil droplets more readily rise to the surface of the emulsion, accumulated oil being removed from the surface.

Attorney, Agent or Firm: Head, Johnson & Kachigian ;

Primary / Asst. Examiners: Lithgow, Thomas M.;

Maintenance Status: E2 Expired  Check current status

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Designated Country: DE DK FR GB IT 

Family: Show 6 known family members

First Claim:
Show all 19 claims
What is claimed:     1. A method of removing dispersed oil from an oil in water emulsion comprising the steps of:
  • (a) entraining gas in water to form an aerated mixture;
  • (b) introducing said emulsion into a treatment vessel having a divider therein extending upwardly from the bottom of the vessel separating the vessel into a first and second compartment, the emulsion passing into the first compartment in which is positioned a first assembly of closely spaced matrix plates formed of oleophilic material, the emulsion passing in contact with said matrix plates;
  • (c) introducing said aerated mixture into said treatment vessel to intermingle with said emulsion as the emulsion passes in contact with said matrix plates to cause oil droplets to coalesce on said matrix plates and small gas bubbles from said aerated mixture to adhere to said oil droplets to cause said oil droplets to more readily rise in said emulsion;
  • (d) maintaining a liquid level within said vessel, said oil droplets rising to the surface of the liquid;
  • (e) extracting oil that accumulates on the surface of the liquid from said vessel; and
  • (f) removing water that flows over an upper edge of said divider into said second compartment of the vessel, and through a second assembly of matrix plates, the water being removed from said second compartment and having a substantial portion of the oil removed therefrom.

Background / Summary: Show background / summary

Drawing Descriptions: Show drawing descriptions

Description: Show description

Forward References: Show 26 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (26)   |   Backward references (15)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 5pp US3182799  1965-05 Krofta   Method and an apparatus for purifying the unclarified waste water in the paper and pulp and like industries
Get PDF - 11pp US3754656  1973-08 Horiguchi  Kurita Water Industries, Ltd. FLOATATION SEPARATORS
Get PDF - 5pp US4113629  1978-09 Pielkenrood  Pielkenrood-Vinitex B.V. Separation device provided with a coalescence apparatus
Get PDF - 8pp US4231867  1980-11 Sutphin   Method and apparatus for treating heterogeneous fluid systems
Get PDF - 11pp US4246112  1981-01 Mausgrover  Ultracept, Inc. Oil-water separator having means for conditioning the water for reuse
Get PDF - 10pp US4253965  1981-03 Dielkenrood  Pielkenrood-Vinitex B.V. Purification device
Get PDF - 11pp US4377485  1983-03 Krofta  Lenox Institute for Research, Inc. Apparatus and method for clarification of water using combined flotation and filtration processes
Get PDF - 10pp US4782789  1988-11 Canzoneri   Induced static flotation cell
Get PDF - 14pp US4800025  1989-01 Bibaeff  Pony Industries, Inc. Apparatus and process for the gas flotation purification of oil-contaminated water
Get PDF - 6pp US4802978  1989-02 Schmit et al.  McTighe Industries, Inc. Oil-water separator
Get PDF - 12pp US5080802  1992-01 Cairo, Jr. et al.   Induced gas liquid coalescer and flotation separator
Get PDF - 15pp US5156745  1992-10 Cairo   Induced gas liquid coalescer and flotation separator
Get PDF - 13pp US5300222  1994-04 Braussard   Water clarification method and apparatus
Get PDF - 13pp US5320750  1994-06 Krofta   Water clarifier with first filtrate isolation, improved backwashing and improved bubble generation
Get PDF - 9pp US5516434  1996-05 Cairo  Unicel, Inc. Single cell gas flotation separator with filter media
Foreign References:
Publication Date IPC Code Assignee   Title

Other Abstract Info: CHEMABS 127(15)207914N CHEMABS 127(15)207914N

Other References:
  • Byeseda J., Hunter, D. (1979), "Development of a Rectangular Configuration Dissolved Gas Flotation System" NATO Internal Research Report #79018.
  • Calkin, B., Ball, B. (1984), "Improving Heater Treater Dehydration Efficiency with Performax." Proceedings from the Southwestern Petroleum Short Course. 407-413.
  • Casady, A.L. (1993), "Advances in Flotation Unit Design for Produced Water Treatment." Production Operations Symposium-Oklahoma City, Mar. 21-23, 581-590.
  • Carriere, G.R., (1990) "Using Coalescence to Improve Efficiency of Oil/Water Separation: Field Experience, the S.P. Pack Free Flow Coalescer." Advances in Filtration and Separation Technology, 1, 266-281.
  • Gregmont, G. (1950) Water Treatment Handbook, Baily Brothers Publishers, London, England, 315-327.
  • Hunter, D. (1984), "Laboratory Evaluation of Various Performax Coalescing Packs." NATCO Internal Research Report #84014.
  • Hunter, D. Byeseda J. (1979), "Field Evaluation of C-E Natco's Rectangular Configuration Dissolved Air Flotation Pilot at Sun Oil Company's Tulsa Refinery." NATCO Internal Research Report #79019.
  • Leech, C.A., Radhakrishnan, S., Hillyer, M.J., Degner, D.R. (1980), "Performance Evaluation of Induced Gas Flotation Machine Through Mathematical Modeling."Journal of Petroleum Technology, Jan, 48-58. (11 pages)
  • Montgomery, J.M. (1985), Water Treatment Principles and Design, Wiley Interscience Publication, NY. 149-151, 533, 534, 649, 650.
  • Okada K., Akagi, Y., Kogure, M., Yoshioka, N. (1990), "Effect on Surface Charges of Bubbles and fine Particles on Air Flotation Process." The Canadian Journal of Chemical Engineering, 68, 393-398. (7 pages)
  • Okada, K., Akagi, Y., Yoshioka, N. (1988), "Effect of Zeta Potentials of Oil Droplets and Bubbles on Flotation of Oil-In-Water Mixtures." The Canadian Journal of Chemical Engineering, 66, 276-281. (6 pages)
  • Rehm, S.J. Shaughnessy, R.J. (1983), "Enhanced Oil-Water Separation--The Performax Coalescer." Society of Petroleum Engineers of AME--Proceedings from the Production Operations symposium. 165-171.
  • Pal, R., Masliyah, J. (1990), "Oil Recovery from Oil in Water Emulsions Using a Flotation Column." The Canadian Journal of Chemical Engineering, 68, 959-967. (9 pages)
  • Sato, Y., Murakami, Y., Hirose, T., Urya, Y., Hirata, K. (1980), "Removal of Emulsified Oil Particles by Dispersed Air Flotation." Journal of Chemical Engineering of Japan, 13, 385-389. (5 pages)
  • Sato, Y., Murakami, Y., Hirose, T., Urya, Y., Hirata, K. (1979), "Removal of Emulsified Oil Particles by Dissolved Air Flotation." Journal of Chemical Engineering of Japan, 12, 454-459. (6 pages)
  • Shaughnessy, R.J. (1982), "Evaluation of the Performax Matrix Plate Coalescer for Marathon Oil Company, Cody, Wyoming." NATCO Internal Research Report #82011.
  • Strickland W.T. (1980), "Laboratory Results of Cleaning Produced Water by Gas Flotation." Society of Petroleum Engineers Journal, Jun., 175-190. (16 pages)
  • Sylvester, N.D., Byeseda, J.J. (1980) "Oil/Water Separation by Induced--Air Flotation." Society of Petroleum Engineers Journal, Dec. 579-590.
  • Van Ham, N.J.M., Behie, L.A., Svrcek, W.Y. (1983), "The Effect of Air Distribution on the Induced Air Flotation of Fine Oil In Water Emulsions." The Canadian Journal of Chemical Engineering, 61, 541-547. (7 pages)

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