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| Number | Title | Issue Date |
| 7438129 | Water treatment method for heavy oil production using calcium sulfate seed slurry evaporation A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. Feedwater is then acidified and steam stripped to remove alkalinity and dissolved non-condensable ga... | 10/21/2008 |
| 7428926 | Water treatment method for heavy oil production A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. Pretreated produced water is then fed to an evaporator. Up to 95% or more of the pretreated produced... | 09/30/2008 |
| 7291250 | Vacuum distillation system and use thereof for concentrating organic-aqueous solvent mixtures The present invention relates to a vacuum distillation plant and a process for concentrating organic aqueous solutions, especially spissum extracts, using said plant. The vacuum distillation plant of the invention comprises a flash evaporator, a means for vapor conc... | 11/06/2007 |
| 7258765 | Vaporization chamber, and distillation system comprising same, providing improved temperature sensing of liquid contained in the chamber Vaporization chambers (distillation “pots”) are disclosed in which the liquid contained in such a pot is heated and circulated to establish thermal uniformity of the liquid and to route the circulated liquid past a thermally conductive member that contacts the l... | 08/21/2007 |
| 7153394 | System to isolate dianhydrides A process to isolate dianhydride from an exchange reaction comprises extracting a bisimide/anhydride exchange reaction aqueous phase with an organic solution comprising an exchange catalyst at a first temperature and pressure to form an extracted aqueous phase compr... | 12/26/2006 |
| 7150320 | Water treatment method for heavy oil production A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. If necessary, the pH is then adjusted, normally downward, releasing at least some carbonate alkalini... | 12/19/2006 |
| 7097736 | Dairy wastewater treatment A process and apparatus for recycling dairy wastewater wherein the wastewater is supplied to at least one first evaporation apparatus to produce a water distillate and sludge. The sludge is then supplied to at least one second evaporation apparatus arranged in serie... | 08/29/2006 |
| 7077201 | Water treatment method for heavy oil production An evaporation based method of treating produced water from heavy oil production. A produced water from heavy oil recovery operations treated by first removing oil and grease to a desired level, preferably to about twenty parts per million, or less. If necessary, th... | 07/18/2006 |
| 6984292 | Water treatment process for thermal heavy oil recovery There is disclosed a method and apparatus for treating produced water from a heavy oil thermal recovery unit to achieve water recovery and recycle levels of greater than 80% and as high as 100% to achieve zero discharge criteria. The method includes the initial step... | 01/10/2006 |
| 6955743 | Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor The invention relates to a process for recovering and producing chemicals in a pulp production process where organic chemicals, such as formic acid and acetic acid, are used as cooking chemicals. The process of the invention is based on regeneration of cooking acids... | 10/18/2005 |
| 6936140 | Water distillation system A distillation system is provided for recovering water from sea water and other polluted water source. The system has a heat engine embodying Carnot cycle and a Rankine cycle formed by heat exchangers, flash evaporator and condenser. Burnt gases from the engine such... | 08/30/2005 |
| 6849155 | Concentrator This invention provides a concentrator capable of drawing out a concentrate of a constant concentration. The concentrator includes a heater having a heating medium that has been heated to a temperature not less than the boiling point of a solution fed to the concent... | 02/01/2005 |
| 6837969 | Method for the concentration of liquid mixtures A method for the concentration of liquid mixtures includes the step of causing a continuous stream of the liquid mixtures to flow in the form of a turbulent thin layer in contact with a heated wall; for that purpose, a continuous stream of liquid mixture is fed into... | 01/04/2005 |
| 6733636 | Water treatment method for heavy oil production A method of treating produced water from heavy oil production to provide feedwater for the production of high quality steam. A produced water from heavy oil recovery operations is initially treated by first removing oil and grease to a desired level, preferably to a... | 05/11/2004 |
| 6716320 | Evaporation of liquids A liquid sample 3 held in an open container 2 and including a volatile solvent, is evaporated by continuously removing inert gas rich in vapor by means of a suction tube 5 whose open end is held close to the top surface of the liquid. Vapor in t... | 04/06/2004 |
| 6685802 | Process and apparatus for removing dissolved and undissolved solids from liquids This invention relates to a continuous process and an apparatus (1) for removing dissolved and undissolved solids and/or high boiling point liquid contaminants from a mixture of miscible liquids (9). A recycle liquor stream (6) is fed at high velocity thr... | 02/03/2004 |
| 6685801 | Chambered circulation evaporator A circulation evaporator for separating mixtures having more volatile and less volatile components. The circulation evaporator contains an evaporator, a discharge container connected to the evaporator by a connecting piece, a condenser, a vacuum pump, a r... | 02/03/2004 |
| 6660130 | Apparatus for vaporization of liquids Prior to carrying out a gaseous phase chemical reaction, a liquid phase organic compound which is prone to degrade is vaporized at elevated pressures with the aid of a second compound which together with the organic compound produces a mixture having a bo... | 12/09/2003 |
| 6649028 | Column treating process and apparatus thereof The present invention provides a column treating method by use of a distillation column and so on, which method enables to effectively remove solid impurities such as precipitates and polymers contained or produced in a treating fluid, and to thereby stab... | 11/18/2003 |
| 6632329 | Distillation apparatus and distilling method A distillation apparatus is provided with a distillation tower, a reboiler, a bottom outflow pipe for drawing a liquid from the bottom of the distillation tower, and a pot provided between the bottom of the distillation tower and the bottom outflow pipe. ... | 10/14/2003 |
| 6582552 | Method and device for evaporating liquid A liquid evaporation method and apparatus wherein the contamination of the heat transfer surfaces is avoided by using a special circulating fluid. The liquid to be evaporated is heated in direct contact with the circulating fluid and conveyed to a vapor s... | 06/24/2003 |
| 6572831 | Materials treatment A material contaminated with a solvent is treated with a hydrofluorocarbon to remove the contaminant. The hydrofluorocarbon can be tetrafluoroethane.... | 06/03/2003 |
| 6551466 | Multiple effect distillation process with reduced fouling A method and apparatus for removing a contaminant from a fluid feed stream containing the contaminant. The method includes the steps of providing a feed stream and heating it in a first step to at least partially remove some of the contaminants and recove... | 04/22/2003 |
| 6547933 | Process for the purification of aromatic polyamines A process for the purification of a mixture of aromatic polyamines obtained by hydrogenation of the corresponding aromatic polynitro compounds, said mixture including the various isomers of the said amines as well as reaction by-products, including the st... | 04/15/2003 |
| 6468389 | Undulating membrane surface for evaporative processes An evaporative process employing an undulating flexible membrane (4) as an evaporative surface onto which a vaporizing gas (2) such as, but not limited to, air, contacts a liquid solution (1, 5) such as, but not limited to, water, and evaporation occurs. ... | 10/22/2002 |
| 6454907 | Method and apparatus for concentrating slurried solids Method and apparatus for concentrating slurries by removing liquid in a single effect unit maintained under vacuum to effect low temperature flashing of the liquid. The single effect unit is a single flash column with separate recirculation loops, one to ... | 09/24/2002 |
| 6402897 | Apparatus for distilling, heating and storing liquid A combination liquid distillation unit and heater, where the distilled liquid is heated to an elevated temperature to effect distillation, and then stored and maintained at an elevated temperature in a hot liquid tank. Thermal communication between the di... | 06/11/2002 |
| 6391162 | Desalination apparatus and method of operating the same A desalination apparatus and method utilizing solar energy provided with a solar heat collector for heating a heating medium with solar energy, a heat exchanger cooperating with an evaporation can so as to subject the heating medium and raw water in the e... | 05/21/2002 |
| 6383341 | Apparatus for obtaining pure water from crude water Apparatus for obtaining pure water from crude water includes an evaporator arrangement (10) that has a first circuit (101) for cirulating crude water, a second circuit (102) for circulating liquid coolant, and membrane elements for separating the circulat... | 05/07/2002 |
| 6375803 | Mechanical vapor recompression separation process A method and apparatus for removing a contaminant from a fluid feed stream containing the contaminant. The method includes the steps of providing a feed stream (10) and heating it in a first step (18) to at least partially remove some of the contaminants ... | 04/23/2002 |
| 6365005 | Apparatus and method for vapor compression distillation An improved design of a vapor compression distiller which makes use of a rapid, highly turbulent flow through the heat-of-evaporation recovery, or primary, heat exchanger. The distiller may also include the use of turbulators to increase turbulence and mi... | 04/02/2002 |
| 6364996 | Device for treatment and removal of aqueous liquids by controlled atmospheric action A bifurcated fan (1) which draws in atmospheric air through air/liquid contact blocks of plastic grids which are sprayed with the liquid to be treated. The blocks change position in order to be sprayed on both front surfaces alternatively and thus remain ... | 04/02/2002 |
| 6355145 | Distillation process with reduced fouling A method for removing a contaminant from a fluid feed stream containing the contaminant. The method includes the steps of providing a feed stream and heating it in a first step to at least partially remove some of the contaminants and recover energy from ... | 03/12/2002 |
| 6258215 | System and a rotary vacuum distiller for water recovery from aqueous solutions, preferably from urine aboard spacecraft The system for the recovery of water from urine aboard spacecraft includes a urine intake and pretreatment unit, a unit for water reclamation from urine and a condensate purification unit. The unit for water reclamation from urine is made on the basis of ... | 07/10/2001 |
| 6224716 | Apparatus for dehydrating oil A system for dehydrating lubricating and hydraulic fluids includes a heating circuit and circuitry for creating a vacuum. The heating circuitry introduces a stream of heated fluid into a vacuum chamber in which a partial vacuum is drawn by the vacuum circ... | 05/01/2001 |
| 6117275 | Process and device for regenerating a contaminated solvent Process and apparatus for regenerating a contaminated solvent wherein said solvent is first separated from higher-boiling contaminants in an evaporator, and then contaminants having a lower boiling point than said solvent are separated out in a condenser ... | 09/12/2000 |
| 6090240 | Method of inhibiting scaling in black liquor evaporators A method of inhibiting calcium carbonate scaling in a multi-stage evaporation plant of black liquor by heat-treating calcium-containing liquor includes a first stage wherein the calcium-containing liquor is heated to about 110-145° C. with direct contact... | 07/18/2000 |
| 6051111 | Cold distillation method A method of distillation having the steps of drawing a volume of untreated water containing impurities into a container, applying a vacuum to the container, applying an oscillating electric charge to the untreated water thereby producing water vapor from ... | 04/18/2000 |
| 6027607 | Salt extraction process and device A process for extracting salt from brine contained in at least one open evaporation basin. At least part of the brine is heated in a heating unit located outside the evaporation basis and returned to the evaporation basin. The heating unit is driven by wa... | 02/22/2000 |
| 5922174 | Distilling apparatus Distilling equipment including evaporation apparatus having a boiling chamber and equipment and conduits for supplying raw liquid to the boiling chamber, a plurality of cells with the first cell being connected to the top of the boiling chamber to receive... | 07/13/1999 |
