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| Number | Title | Issue Date |
| 7520964 | Method for the rectifying separation of fluids containing (meth)acryl monomers A process for rectificatively separating at least one (meth)acrylic monomer-containing fluid by feeding the fluid into a rectification column containing at least one sieve tray without a runoff segment, wherein an elementary cell i... | 04/21/2009 |
| 7431804 | Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent A process is proposed for the distillation or reactive distillation of a mixture that includes at least one toxic component, the process being carried out in a column containing a structured packing, having at least one packing layer (1) having a lower end ( | 10/07/2008 |
| 7416643 | Solar water desalination/purification device A solar water desalination and purification device includes an outer liquid-tight containment and an inner liquid-tight containment disposed within the outer containment. The outer containment collects liquid that forms from condensing water vapor that evaporates wi... | 08/26/2008 |
| 7390380 | 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... | 06/24/2008 |
| 7357849 | Method and system for separating solids from liquids A method and system for treating feedwater includes evaporating a portion of the feedwater in a first evaporation chamber so as to separate water vapor from the remaining feedwater. Droplets of the remaining feedwater are dispersed into a stream of hot air produced ... | 04/15/2008 |
| 7351312 | Apparatus for obtaining sample and process therefor A vessel is provided for collecting a process stream and fractionating the process stream into a liquid and gas phase in the vessel. Cooling may be provided by an internal bath and/or an external bath. The liquid phase retained in the vessel and the gas phase collec... | 04/01/2008 |
| 7332057 | Method of vaporizing liquids by microwave heating This invention is directed to a method for vaporizing a liquid by slowly evaporating the liquid from a liquid phase to a vapor phase below the boiling point of the liquid; and applying an effective amount of microwave power to maintain the slow evaporation of the li... | 02/19/2008 |
| 7326323 | High capacity purification of thermally unstable compounds Separations processes and apparati capable of purifying thermally sensitive materials at high capacity. An apparatus having a rectification section and a stripping section with the stripping section having a stripping tray with 5 to 50% open area, a pressure drop fr... | 02/05/2008 |
| 7297237 | Method and device for separation and concentration by evaporation of mixture with separation factor of approx. 1 By using a dephlegmator which conducts distillation concurrently with heat exchange within at least one distillation column, or a portion of one distillation column, of a distillation cascade, the quantity of liquid holdup within the distillation apparatus is reduce... | 11/20/2007 |
| 7282118 | Method for production of easily polymerizable substance and purification apparatus This invention resides in providing a method for the prevention of possible polymerization of the easily polymerizable substance during the purification thereof by a column provided with (a) at least one tray directly fixed to a support ring with a bolt and a nut an... | 10/16/2007 |
| 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 |
| 7264696 | 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... | 09/04/2007 |
| 7258767 | Solar dew tube The invention pertains to a device for the condensation of water from an aqueous liquid by using a temperature gradient, which device includes: (a) a vapor chamber that can be brought in contact with a condensation compartment wher... | 08/21/2007 |
| H2194 | Purification of phenols This invention relates to a process for the purification of phenols in a feedstock containing phenols and neutral oils and/or tar bases. The process includes liquid-liquid extraction of feedstock using a solvent and a counter-solvent, and separating the resulting so... | 07/03/2007 |
| 7235158 | Perforated tray column without downcomer A perforated tray without downcomer having only a small deviation between the opening ratio based on the diameter of a column and the actual opening ratio and a perforated tray column without downcomer formed by disposing such perforated trays without downcomer are ... | 06/26/2007 |
| 7217343 | Point of use water purification method and apparatus A compact, energy efficient, continuous-flow point of use distillation system utilizes stacked, vertically-arranged components to provide a compact and energy efficient distillation process and a device which is quick and easy to service and maintain. A housing cont... | 05/15/2007 |
| 7150809 | Thermal separating process (Meth)acrylic monomers are separated by a thermal separation process by ascending at least one ascending gaseous stream in a separating column containing a sequence of mass transfer trays and a liquid stream that contains dissolved polymerization inhibitor which des... | 12/19/2006 |
| 7132038 | Method and device for obtaining 1,3 pure butadiene from 1,3 raw butadiene by distillation A process for obtaining pure 1,3-butadiene from crude 1,3-butadiene by distillation is carried out in a dividing wall column in which a dividing wall is located in the longitudinal direction of the column to form an upper common column region, a lower common column ... | 11/07/2006 |
| 7118653 | Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column Process for the purification of toluenediisocyanate from a crude distillation feed which includes toluenediisocyanate, an organic solvent and less than 2% by weight phosgene by separating the crude distillation feed in a dividing-wall distillation column into at lea... | 10/10/2006 |
| 7108770 | Process for the purification of toluene diisocyanate incorporating a dividing-wall distillation column for the final purification Toluene diisocyanate is recovered from a crude distillation feed containing less than 2% by weight of phosgene by (a) fractionating the crude distillation feed containing less than 2% by weight of phosgene to remove the solvent and optionally the reaction res... | 09/19/2006 |
| 7102092 | Power window switch apparatus A power window switch apparatus includes: a switch body; a operating knob pivotally supported by the switch body; a first stopper that is provided to the switch body and restricts a rotation of the operating knob to a first predetermined angle; and a second stopper ... | 09/05/2006 |
| 7067044 | Multi-unit, distributive, regenerable, in situ desalination method Cultivated field water is desalinated by a series of independent units that float on the water surface, taking up the saline water with a wick, evaporating the water from the wick in desalinating relation by concentrating incident solar radiation with a combination ... | 06/27/2006 |
| 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 |
| 7008544 | Hydrate-based desalination/purification using permeable support member Processes and apparatus are disclosed for separating and purifying aqueous solutions such as seawater by causing a substantially impermeable mat of gas hydrate to form on a porous restraint. Once the mat of gas hydrate has formed on the porous restraint, the portion... | 03/07/2006 |
| 7008515 | Solar water still A solar water still (10) includes an enclosure assembly (12) and an evaporation assembly (14) that float on a body of source water and that are readily collapsed and folded for storage or transport. The enclosure assembly includes a transparent ... | 03/07/2006 |
| 6969467 | Hydrate-based desalination with hydrate-elevating density-driven circulation In hydrate-based desalination or other water purification conducted using naturally buoyant or trapped-gas-assisted buoyancy hydrate in a hydrate fractionation column, a portion of fresh or purified product water is extracted from an upper, hydrate dissociation regi... | 11/29/2005 |
| 6964728 | Separation process Bisphenol-A-bis(neopentylglycolphosphate) products of enhanced properties and processes for preparing them are described. One of the processes includes (a) mixing and reacting neopentyl glycol and bisphenol-A-bis(dichlorophosphate) in an inert polar organic solvent ... | 11/15/2005 |
| 6955744 | Method for purifying 2-chloro-5-chloromethylthiazole The present invention relates to a process for the preparation of pure 2-chloro-5 -chloromethylthiazole by distillation in the presence of oligomeric polyethers. ... | 10/18/2005 |
| 6939444 | Sulfur-bearing residue treatment system A sulfur-bearing residue treatment system is provided for the recovery of valuable organic components and the reduction of capital costs and operating costs. The treatment system involves the use of a stripping vessel in conjunction with a heating apparatus. All ele... | 09/06/2005 |
| 6893540 | High temperature peltier effect water distiller An apparatus for and method of distillation uses a high temperature thermoelectric device to heat a liquid, such as water to vapor (steam) and cool the vapor to a purified, distilled liquid. Distillation system has no moving parts, thereby increasing reliability whi... | 05/17/2005 |
| 6887344 | Compact wastewater cleaning apparatus A compact, self-contained apparatus for treating wastewater containing as impurities and pollutants various non-volatile (at water boiling points) fluids such as greases, oils and soaps, a vessel for collecting the wastewater, a heating chamber including electric he... | 05/03/2005 |
| 6878239 | Process for inhibiting a polymerization in a vacuum section of an easily polymerizable compound purification system A process for inhibiting a polymerization of an easily polymerizable compound purification system is disclosed. According to the present invention, the polymerization of the easily polymerizable compound such as (meth)acrylic acid and (meth)acrylate flowed in... | 04/12/2005 |
| 6866750 | Device for desalination of water and methods of use The present invention provides a device and method for desalinating saltwater which utilizes a heatable vessel wherein is placed a sufficient quantity of a salt which will absorb water of crystallisation and which has a dissolution index of not higher than 10âˆ... | 03/15/2005 |
| 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 |
| 6830661 | Point of use water purification method and apparatus A compact, energy efficient, continuous-flow point of use distillation system utilizes stacked, vertically-arranged components to provide a compact and energy efficient distillation process and a device which is quick and easy to service and maintain. A housing cont... | 12/14/2004 |
| 6805774 | Apparatus and process for purifying a liquid by thermoelectric peltier means A continuous process and apparatus is provided for treating an impure liquid to produce purified liquid. The process includes electrically activating a thermoelectric module (24) to provide a first module heated surface (26) and a module cooler surface... | 10/19/2004 |
| 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 |
| 6797123 | Device at distillers adapted to distill solvents for recovery of pure solvent from impure solvent The present invention relates to a device for a distiller adapted to distil solvents for recovery of pure solvent from impure solvent, the solvent (2) being used for washing away residues of paint from spray guns. The distiller (1) includes an outer co... | 09/28/2004 |
| 6793776 | Operation of heads column A process for the enhanced recovery and operation of hydrogen cyanide (HCN)/heads column obtained from the reactor effluent of an ammoxidation reaction of propane, propylene or isobutylene by reducing the polymer formation above the feed tray in the heads tower.... | 09/21/2004 |
| 6755943 | Perforated tray without downcomer, perforated tray tower without downcomer A perforated tray without downcomer in accordance with the present invention satisfies following conditions: (a) The hole has a diameter of 10 mm to 25 mm. (b) Two adjacent holes are spaced by a distance of 1.2 d to 3 d, measured between the two centers. (c) The tra... | 06/29/2004 |
