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| Number | Title | Issue Date |
| 7381310 | Installation used to obtain salt-free sea water at a low temperature with continuous operation and enthalpy recovery A sea water desalination installation that employs an evaporation-condensation system which operates continuously at a low temperature and which enables the recovery of energy released. The installation includes a cylindrical evaporator having a large evaporation su... | 06/03/2008 |
| 7360550 | System for recycling spent sulfuric acid, method for recycling spent sulfuric waste liquid, and recycled sulfuric acid A system for recycling spent sulfuric acid, wherein spent sulfuric acid is effectively utilized at a place other than a discharge source regardless of geographical conditions, and a method for recycling waste sulfuric acid. In the system, when spent sulfuric acid th... | 04/22/2008 |
| 7279075 | Thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers In a thermal separating process between at least one gaseous and at least one liquid stream, of which at least one comprises (meth)acrylic monomers, in a separating column containing sieve trays as separating internals, at least some of the sieve trays are operated ... | 10/09/2007 |
| 7252743 | Method for concentrating solution An low concentration dope is fed through a nozzle into a concentrating apparatus, and flash evaporation of the low concentration dope is performed at an end of the nozzle. The low concentration dope is concentrated thereby to an concentrating dope which is contained... | 08/07/2007 |
| 7232504 | Apparatus and method for distilling waste liquids A distilling apparatus and method use a two step distillation and purification process for processing a waste liquid, such as an impure sulfuric acid solution, to form a highly concentrated sulfuric acid solution. First, the waste liquid is stored in a concentrating... | 06/19/2007 |
| 7175696 | Method and apparatus for corrosive gas purification Herein is disclosed a method and an apparatus for preparing a highly purified gas from a crude liquid comprising the gas and one or more of a metal, particulates, water vapor, or a volatile impurity. The method comprises: (a) vaporizing the crude liquid, to yield (i... | 02/13/2007 |
| 7153432 | Method of purifying Fischer-Tropsch derived water A process for the production of highly purified water 38 from Fischer-Tropsch reaction water 12, includes at least the steps of a primary treatment stage comprising an equilibrium staged separation process 14 having at least one stage for removi... | 12/26/2006 |
| 7118654 | Riser base A chimney tray for a column for thermal treatment of a liquid. The chimney tray includes a total take-off of liquid by a drain connection arranged at an edge of the chimney tray, and having one or more drain channels having a gradient in a direction of the drain con... | 10/10/2006 |
| 7105078 | Method for producing an aqueous hydroxylamine solution devoid of salt A process for preparing a salt-free aqueous hydroxylamine solution by reacting an aqueous solution of a hydroxylammonium salt with a base to give a mixture and separating from said mixture by distillation a salt-free aqueous hydroxylamine solution, involving using a... | 09/12/2006 |
| 7048833 | Method and apparatus for treating oxygenate-containing feeds and their use in conversion of oxygenates to olefins A feed vaporization process and apparatus for oxygenate to olefin conversion is provided which uses a vapor-liquid disengaging drum to separate non-volatiles and/or partial non-volatiles from volatiles in the oxygenate feed and produce a vaporized effluent that is r... | 05/23/2006 |
| 7029557 | Method for producing an aqueous hydroxylamine solution devoid of salt The invention relates to a method for producing a highly pure, aqueous hydroxylamine solution by distilling an aqueous solution, devoid of salt, of a hydroxyl ammonium salt in a plate column comprising at least two mechanical plates. Said method is characterised in ... | 04/18/2006 |
| 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 |
| 6942762 | Method for the production of a salt-free aqueous hydroxylamine solution A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tra... | 09/13/2005 |
| 6740205 | Processing of shipboard wastewater Incoming wastewater is preheated in a heat exchanger before delivery to a flash chamber through an orifice for flashing into water vapor rising into an upper section of the flash chamber which also has a bottom section into which liquid waste oil or other contaminan... | 05/25/2004 |
| 6682633 | Apparatus for cocurrent fractional distillation A modular apparatus for fractional distillation and other forms of vapor-liquid contacting is presented. The apparatus performs cocurrent contacting of vapor and liquid in a number of identical structural units which are placed in horizontal layers in a c... | 01/27/2004 |
| 6656327 | Method and device for the production of pure steam An evaporation product discharged from a lower end a falling-film evaporator enters a downpipe (7), makes a 180° turn at a bottom of the downpipe, and moves upward through an annular rising channel (9) defined between the downpipe and an intermediate hou... | 12/02/2003 |
| 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 |
| 6428656 | Water-cooled distilling apparatus A water-cooled distilling apparatus for purifying or distilling raw water. The apparatus includes a boiler, cooling tray assembly, and collection vessel. In use, raw water is initially poured into the boiler which has a self-regulating screen in it. As th... | 08/06/2002 |
| 6406597 | Water distilling device A distilling device for converting unprocessed water into pure water including a fill tank, a base having a removable water tray with a boiling chamber therein for holding the unprocessed water, a removable mist chamber disposed above the base and having ... | 06/18/2002 |
| 6365006 | Method for distilling a mixture of substances and device for realizing the same The present invention pertains to the alcohol processing industry and relates to a method that includes feeding a mixture into a distillation column which is fitted with contact devices for discharging the vapors through the top of said column. This metho... | 04/02/2002 |
| 6350352 | Process for separating by distillation pure (meth)acrylic acid from mixtures A process for distillative separation of pure (meth)acrylic acid from mixtures which include comprise (meth)acrylic acid and dimers and oligomers of (meth)acrylic acid and are essentially free from aldehydes and from components whose boiling point is lowe... | 02/26/2002 |
| 6345811 | Combined packing-tray in a vapor-liquid contacting tower and a process for effecting operation with high capacity and high turndown ratio A vapor-liquid contacting tower having a tray deck, at least one downcomer and a structure packing layer in the space under the vapor-liquid bubble contacting tray wherein the tray deck has an opening such that vapor ascends upward through the opening to ... | 02/12/2002 |
| 6344361 | Method of detecting the presence of impurities, unit and method for vaporizing liquid, and double air-distillation column A film-type vaporizer in a vaporization enclosure, for example the upper column of a double air-distillation column, is associated with a measurement and analysis box where a polished surface and a spillway reconstruct the flow of liquid in the vaporizer ... | 02/05/2002 |
| 6334935 | Distillation of (meth) acryloxy-bearing alkoxysilane A (meth)acryloxy-bearing alkoxysilane is isolated and purified to a high purity by distilling a reaction solution containing the (meth)acryloxy-bearing alkoxysilane in a thin-layer distillation device at a temperature of 90-160° C. and a vacuum of 1-15 m... | 01/01/2002 |
| 6332949 | Method for upgrading used sulfuric acids A process for concentrating spent sulphuric acids particularly sulphuric acids which arise during the nitration of hydrocarbons with nitric acid in the presence of sulphuric acid, wherein single- or multi-stage concentration is effected under vacuum.... | 12/25/2001 |
| 6299735 | Method for solid-liquid separation in water-based solutions An array of sonic hydraulic nozzles for injecting a mixture of water with dissolved or suspended particulate into a chamber to form a continuous spray of spherical droplets. Low pressure areas form in the wakes of the droplets which promotes a phase chang... | 10/09/2001 |
| 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 |
| 6254734 | Barometric evaporation process and evaporator A process for the evaporation of an available warm or hot liquid under a vacuum by applying a pressure drop thereon initiating flash-down evaporation, and followed by further flash-down evaporation under an applied pressure gradient whereby the residual l... | 07/03/2001 |
| 6197162 | Liquid purifying distillation process A method of remediating water contaminated by dissolved gases and liquids and suspended particles wherein the contaminated water is collected into a closed container without filling the container and heated to a temperature below the boiling point of wate... | 03/06/2001 |
| 6193849 | Fractionator with liquid-vapor separation means A fractionator has a fractionation vessel, a reactor effluent vapors inlet, a vapor feed contacting zone, a baffled contacting section above the vapor feed contacting zone, a tops section above the baffled contacting section, a heavy bottoms liquid hold-u... | 02/27/2001 |
| 6143856 | Process for the production of phenolic-rich pyrolysis oils for use in making phenol-formaldehyde resole resins A phenolic-rich pyrolysis oil is produced by pyrolysing lignocellulosic material at a temperature of no more than about 550° C under an absolute pressure of no more than about 50 kPa to produce pyrolysis vapors, and condensing the pyrolysis vapors to obt... | 11/07/2000 |
| 6113744 | Water distillation apparatus A water distillation apparatus includes a degasification chamber having a top and a bottom. A liquid inlet is positioned adjacent to the bottom. A gas outlet is positioned adjacent to the top. A liquid outlet is positioned intermediate the top and the bot... | 09/05/2000 |
| 6066239 | Water distiller with improved solids-removing baffle device A new baffle device for a distiller has a tubular body and a baffle member fixed with respect to such body. The baffle member has a plurality of apertures for stripping dissolved solids from steam passing through the member. The distiller raw water vessel... | 05/23/2000 |
| 6010599 | Compact vacuum distillation device An apparatus for batch distilling a liquid at sub-atmospheric pressure, without the aid of a vacuum pump. The apparatus includes an evaporator section having a valved entry port through which a batch of liquid in a first atmospheric condition is added to ... | 01/04/2000 |
| 6001223 | On-site ammonia purification for semiconductor manufacture Highly purified ammonia for use in semiconductor manufacturing is prepared on-site by drawing ammonia vapor from a liquid ammonia reservoir, passing the vapor through a filter capable of filtering out particles of less than 0.005 micron in size, and scrub... | 12/14/1999 |
| 5972171 | De-entrainment tray and method of operation De-entrainment devices are provided for separating an entrained liquid from a vapor stream exiting a flash zone in a separation column. Methods for utilizing the de-entrainment devices are also provided. In one embodiment, the de-entrainment device of the... | 10/26/1999 |
| 5925224 | Method of and apparatus for purifying a solvent A solvent containing low-boiling and high-boiling impurities in an evaporating section, so that the high-boiling impurities is left as a tank bottom waste, and a solvent vapor from the section is guide through a mist separator into a condenser. A condensa... | 07/20/1999 |
| 5858169 | Process for the simplified separation of multicomponent mixtures of at least partly organic origin A process for separating a multi-component mixture containing solid or liquid organic components by treating the mixture with a gaseous entraining agent comprising a superheated carrier fluid containing a lower monohydric alcohol or a lower monohydric alc... | 01/12/1999 |
| 5846387 | On-site manufacture of ultra-high-purity hydrochloric acid for semiconductor processing Highly purified HCl for use in semiconductor manufacturing is prepared on-site by drawing HCl vapor from a liquid HCl reservoir, and scrubbing the filtered vapor in a low-pH aqueous scrubber.... | 12/08/1998 |
| 5846386 | On-site ammonia purification for semiconductor manufacture Highly purified ammonia for use in semiconductor manufacturing is prepared on-site by drawing ammonia vapor from a liquid ammonia reservoir, passing the vapor through a filter capable of filtering out particles of less than 0.005 micron in size, and scrub... | 12/08/1998 |
