11
Arnaud Baudot
Nathalie Cougard, Arnaud Baudot, Vincent Coupard: Process for separating propane and propylene using a distillation column and a membrane separation column. IFP Energies Nouvelles, Millen White Zelano & Branigan P C, July 2, 2013: US08475567

Process for separating propane and propylene using a distillation column and at least one membrane separation unit constituted by one or more modules operating in series, said membrane separation unit being placed either upstream, or downstream, or upstream and downstream of the distillation column.


12
Donald R Anderson: Purification of saline water. July 19, 1977: US04036749 (382 worldwide citation)

There is disclosed a treatment of water that greatly reduces the scaling tendency of the water during its subsequent use or processing. The treatment comprises precipitation and separation of the calcium values of the water as calcium carbonate by the addition of magnesium hydroxide precipitant ther ...


13
Harold J Vinegar, George L Stegemeier: Vacuum method for removing soil contamination utilizing surface electrical heating. Shell Oil Company, January 15, 1991: US04984594 (301 worldwide citation)

An in-situ method is disclosed for removing contaminants from surface and near-surface soil by imposing a vacuum on the soil beneath a impermeable flexible sheet and then heating the soil with an electric surface heater that is positioned on the soil surface under the sheet. The heater is permeable ...


14
Harold J Vinegar, George L Stegmeier, Eric P de Rouffignac, Charles C Chou: Vacuum method for removing soil contaminants utilizing thermal conduction heating. Shell Oil Company, March 2, 1993: US05190405 (266 worldwide citation)

An in situ method for removal of contaminants from soil imposes a vacuum on the soil through perforated heater wells that are positioned in the soil. The heater wells heat the soil to elevated temperatures by thermal conduction. The heater wells are permeable to vapors which emanate from the soil wh ...


15
Harold J Vinegar, George L Stegemeier, Eric P de Rouffignac, Charles C Chou: Vacuum method for removing soil contaminants utilizing thermal conduction heating. Shell Oil Company, June 7, 1994: US05318116 (266 worldwide citation)

An in situ method for removal of contaminants from soil imposes a vacuum on the soil through perforated heater wells that are positioned in the soil. The heater wells heat the soil to elevated temperatures by thermal conduction. The heater wells are permeable to vapors which emanate from the soil wh ...


16
Williams Frank Archer: Improvements in or relating to the underground gasification of coal. Nat Res Dev, June 18, 1952: GB674082-A (258 worldwide citation)

674,082. Destructive distillation in situ. NATIONAL RESEARCH DEVELOPMENT CORPORATION. July 31, 1950 [June 15, 1949], No. 15989/49. Drawings to Specification. Class 55 (ii). In a system for the underground gasification of coal in which a stream of gasifying medium such as air, air mixed with oxygen, ...


17
Sidney T Fisher, Charles B Fisher: Extraction from underground coal deposits. Barrigar & Oyen, August 23, 1977: US04043393 (255 worldwide citation)

A method of extracting hydrocarbons, energy and other products in situ from an underground coal deposit. A selected part of the coal deposit is heated by electrical induction to temperatures high enough to effect the destructive distillation of coal. The gases and liquids so produced are collected. ...


18
George Leo Stegemeier, Harold J Vinegar: Method for recovering contaminants from soil utilizing electrical heating. Shell Oil Company, Del S Christensen, August 12, 1997: US05656239 (251 worldwide citation)

An in-situ method is disclosed for low pressure vaporization and recovery of contaminants from surface and near-surface soil by electrically heating the soil with a pattern of hollow electrodes and pulling a deep vacuum through the electrodes. The surface of the soil is sealed with an impermeable ba ...


19
Ernest H Price: Pulsed in situ exothermic shock wave and retorting process for hydrocarbon recovery and detoxification of selected wastes. Dennis T Griggs, January 23, 1990: US04895206 (249 worldwide citation)

An active combustion zone is established in situ within a permeable hydrocarbon formation. The permeable formation is periodically charged with a combustible gas, and is thereafter subjected to a high pressure pulse produced by detonation of the combustible gas within an injection well. The periodic ...


20
Patrick R Gruber, Eric S Hall, Jeffrey J Kolstad, Matthew L Iwen, Richard D Benson, Ronald L Borchardt: Continuous process for manufacture of lactide polymers with controlled optical purity. Cargill Incorporated, Merchant Gould Smith Edell Welter & Schmidt, August 25, 1992: US05142023 (205 worldwide citation)

A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is ad ...



Click the thumbnails below to visualize the patent trend.