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| Number | Title | Issue Date |
| 8182654 | Heat pump for high purity bottom product A process for reducing the energy consumption of a distillation column is disclosed. The process includes drawing off an intermediate vapor stream from the rectification section of the distillation column. The vapor stream is compressed and the heat in the vapor str... | 05/22/2012 |
| 7981256 | Splitter with multi-stage heat pump compressor and inter-reboiler A splitter system is disclosed that produces a product stream from a mixed stream of two materials with similar boiling points. A multi-stage heat pump compressor is used in combination with a bottoms reboiler and an intermediate reboiler resulting in reduced utilit... | 07/19/2011 |
| 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 |
| 7384501 | Method for improved turpentine recovery from modern cooking plants A method for the preparation of pulp by means of alkaline cooking, in which method spent liquor is transferred to pressurized tanks, and at least one liquor is expanded corresponding to a temperature difference of 1 to 5° C. The generated steam is led to turpentine... | 06/10/2008 |
| 7368039 | Distiller employing cyclical evaporation-surface wetting A distillation unit (10) employs a rotary heat exchanger (32) forming a multiplicity of evaporation chambers (56) into which a liquid to be purified is sprayed for evaporation. Spray arms (58) spray at a steady rate into all of the evapor... | 05/06/2008 |
| 7357378 | Divided wall exchange column A divided wall exchange column includes a dividing wall strengthened by stiffening members and/or a double wall design to better withstand pressure differentials and minimize temperature differentials. When a double wall is used, cost of manufacture and installation... | 04/15/2008 |
| 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 |
| 7235183 | Glycerine foots salt separation system The present invention provides a method and apparatus for the recovery of salt from a glycerine process, allowing the salt to be used in a brine solution. A salt settling tank is positioned inline between the foots from a crude still bottom and a foot still. Salt se... | 06/26/2007 |
| 7229601 | Ammonia reclamation system A process for reclaiming ammonia from waste streams comprises reacting at least one waste stream with an excess of hydroxide to produce ammonia and water. The ammonia is removed from the reaction vessel and purified. ... | 06/12/2007 |
| 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 |
| 7114491 | Fuel supply apparatus and vapor separator in outboard engine With a low-pressure pump, fuel is supplied to a vapor separator comprising an air discharge port and a ball valve for closing the air discharge port in association with a rise in fluid level of the fuel supplied to the vapor separator. When the fuel is filled into t... | 10/03/2006 |
| 7090748 | Dividing-wall column with feed in whole or in part in the vaporous state and/or side stream take off in whole or in part in the vaporous state A dividing-wall column having a dividing wall which is essentially disposed along the long direction of the column is proposed, which divides the column interior into a feed part, a take off part, an upper shared column part and a lower shared column part, with feed... | 08/15/2006 |
| 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 |
| 7001490 | Purification of ammonia by distillation Crude ammonia is separated into a low boiler fraction, a high boiler fraction and an intermediate-boiling pure fraction by continuous fractional distillation in a distillation apparatus configured either as a dividing wall column or as a system of thermally coupled ... | 02/21/2006 |
| 6966974 | Process for evaporating a solution and an evaporator for use in the process The invention relates to a method for evaporating a solution and an evaporator applied to it. The evaporator (1) has parallel plate heat exchanger elements (3) fitted inside a jacket (2), consisting of a flexible plastic film, for example, and a... | 11/22/2005 |
| 6906234 | Continuous method and heat pump device for enriching liquid low-concentrated reaction mixtures A continuous method and a heat pump device for enrichment of low-concentrated reaction mixtures resulting from the production of cycloalkanedienes by means of catalytic metathesis of cyclic aliphatic alkenes and cyclooligomers in organic reaction media with reduced ... | 06/14/2005 |
| 6846390 | Methods for using hydrophobic liquid to compress steam Methods for using a hydrophobic liquid, such as mineral oil, to compress steam include using a compressor to compress a mixture of steam and the hydrophobic liquid. One embodiment includes the steam to be compressed coming from a boiling aqueous solution in an evapo... | 01/25/2005 |
| 6802941 | Distiller employing cyclical evaporation-surface wetting A distillation unit (10) employs a rotary heat exchanger (32) forming a multiplicity of evaporation chambers (56) into which a liquid to be purified is sprayed for evaporation. Spray arms (58) spray at a steady rate into all of the evapor... | 10/12/2004 |
| 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 |
| 6689251 | Cycled-concentration distiller A distiller (10) that employs a rotary heat exchanger (32) introduces water to be evaporated into evaporation chambers (56). During most of its operation, it collects the water that has passed through the evaporation chamber (56) without evaporating, and ... | 02/10/2004 |
| 6638398 | Methods for the evaporation of an aqueous solution containing ammonia A method including evaporating aqueous solutions containing ammonia, adding an acid to the evaporated vapor flow to form an ammonium salt, and condensing the vapor flow to form a liquid containing the salt. By this method the ammonia formed into a salt is... | 10/28/2003 |
| 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 |
| 6482297 | Method for distilling ammonia The present invention relates to an improved process for distilling ammonia from a mixture, more particular from a mixture resulting from the reaction between aminonitrile and water (which reaction is also called cyclizing hydrolysis). The process for dis... | 11/19/2002 |
| 6436242 | Device and method for distilling water A water distiller has a sub-atmospheric boiler having a non-recirculating brine section, an input, a brine output and a vapor output. The input is for water to be distilled, the brine output for brine, and the vapor output for water vapor. A compressor is... | 08/20/2002 |
| 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 |
| 6375806 | Desiccant reconcentration with control of pollutant gases and vapors Unlike standard atmospheric glycol reconcentration units with reboilers, which release into the atmosphere column overheads containing water vapor, VOCs (volatile organic compounds), H2 S (hydrogen sulfide) and other gaseous (including vaporous... | 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 |
| 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 |
| 6280578 | Operation process of a pumping-ejection stand for distilling liquid products Essence of the invention is a: a liquid, whose saturated vapour pressure is not less than the pressure at the top of a rectification column, is delivered into the nozzle of a liquid-gas jet apparatus as a motive liquid; the pressure maintained in a separa... | 08/28/2001 |
| 6254735 | Process for separating medium boiling substances from a mixture of low, medium and high boiling substances A process for separating a fraction containing low and middle boilers from a mixture of low, middle and high boilers, which involves treating the mixture in a column with low-boiler vapor in the bottom, so that the middle-boiling component accumulates in ... | 07/03/2001 |
| 6217711 | Method of treating condensates A method of treating cellulose pulp mill condensates having an MeOH content using an evaporator and a steam stripper having a reboiler, comprising: (a) Collecting a feed liquor stream having at least 50% of the pulp mill MeOH. (b) Feeding the feed liquor ... | 04/17/2001 |
| 5935388 | Distillation plant with a heat pump A distillation plant includes a heat pump whose working fluid is compressed by a vapor jet compressor. A collection location for a liquid is arranged in the stripper part of a distillation column of the plant. At least a portion of the collected liquid is... | 08/10/1999 |
| 5897749 | Continuous distillative separation of liquid mixtures which contain (meth) acrylic acid as the main component Liquid mixtures which contain (meth)acrylic acid as the main component are continuously separated in a distillation apparatus which comprises a still, a condenser and a connection between still and condenser and to which the liquid mixture to be separated... | 04/27/1999 |
| 5858177 | Process and apparatus for vapor compression distillation using plate and frame heat exchanger An improved process and apparatus for vapor compression distillation is provided comprising a heat exchanger, a vapor compressor, and a liquid-vapor separator. The heat exchanger is preferably of the plate and frame type, with the plate faces being spaced... | 01/12/1999 |
| 5770020 | Distillation apparatus The invention relates to a distillation apparatus (1) which is suitable in particular for the distillation of sea water into fresh water. The apparatus includes a plurality of flat, bag-like elements (3) formed from a thin film material such as plastic fi... | 06/23/1998 |
| 5645694 | Process and apparatus for vapor compression distillation An improved vapor compression distillation process and apparatus are provided having a container with a substantially horizontal longitudinal center axis, two opposing end plates closing each end of the container, a first and second passage area defined w... | 07/08/1997 |
| 5597453 | Apparatus and method for vapor compression distillation device A vapor compression distillation/product concentration device includes an evaporator/condenser core, with alternating boiling and condensing chambers with edge manifolds such that substantially the entirety of each plate surface is used as a heat transfer... | 01/28/1997 |
| 5587054 | Vapor compression distillation system A vapor compression distillation system including a boiler/condenser assembly wherein a portion of the condensate is redirected back to the condenser inlet to extract superheat from the compressed vapor and transfer it to the liquid in the boiler. The vap... | 12/24/1996 |
| 5565070 | Solvent vapor sucking method and solvent recovering apparatus A method for recovering solvent vapor in a manner which requires less power using an apparatus which is smaller in size, has a longer life, and is capable of being operated without reducing recovering efficiency, including locating an inlet of a suction p... | 10/15/1996 |
