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| Number | Title | Issue Date |
| 7485208 | Recycling of ionic liquids produced in extractive distillation Process for working up a bottom stream wherein high boilers and ionic liquid from an extractive rectification in which the ionic liquid is used as entrainer. The process includes feeding the bottom stream to an evaporation stage which is operated at a pressure of le... | 02/03/2009 |
| 7435318 | Ionic liquids as selective additives for separation of close-boiling or azeotropic mixtures The invention relates to a process for separating close-boiling, homo- and heteroazeotropic mixtures by using ionic liquids. Due to the selectivity and unusual combination of properties of the ionic liquids the process is superior to conventional extractive rectific... | 10/14/2008 |
| 7431805 | Method and apparatus for simultaneous heat and mass transfer utilizing a carrier-gas at various absolute pressures A method, system, and apparatuses for simultaneous heat and mass transfer utilizing a carrier-gas at various absolute pressures are described. A method may include: thermally coupling at least two continuous contacting apparatuses together; varying the pressure betw... | 10/07/2008 |
| 7425247 | Method for producing an aqueous solution hydroxylamine This invention relates to a method for producing an aqueous solution of free hydroxylamine (HA) by simultaneous countercurrent treatment of a HA salt with ammonia or ammonia water, then separating the HA by distillation and reconcentrating the aqueous HA solution in... | 09/16/2008 |
| 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 |
| 7351310 | Rectificative separation of fluids comprising (meth) acrylic monomers A process for rectificatively separating fluids including (meth)acrylic monomers in a rectification column by directly cooling the vapor including (meth)acrylic monomers rising to the top of the rectification column to form top condensate including (meth)acrylic mon... | 04/01/2008 |
| 7347918 | Energy efficient evaporation system An evaporation system uses the weight of condensed liquid as an energy source. An inlet feed is introduced into an enclosure through an inlet. The inlet feed is vaporized in an evaporation region of the enclosure, and condensed to a liquid in a condensation region o... | 03/25/2008 |
| 7326283 | Spinning impingement multiphase contacting device A spinning impingement multiphase contacting device and method for heat or mass transfer are disclosed. A first fluid, from which the transfer is to occur, is caused to impinge and be entrained in a spinning permeable element, creating a highly dispersed phase. The ... | 02/05/2008 |
| 7300555 | Method for the rectifying separation of liquids containing (meth)acrylic monomers in a rectification column A process for rectificatively separating liquids containing (meth)acrylic monomers in a rectification column is provided, in which a stream is withdrawn from the rectification column and recycled into the rectification column as a molecular oxygen-enriched liquid ph... | 11/27/2007 |
| 7294240 | Method for producing (meth)acrylic acid esters Basic (meth)acrylates IV are prepared by transesterification of alkyl (meth)acrylates I in the presence of a catalyst and working-up of the reaction mixture by distillation, by a process in which a gas or gas mixture which is inert under the reaction conditions is p... | 11/13/2007 |
| 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 |
| 7287534 | Cleaning of apparatus in which meth(acrylic) acid-containing organic solvents have been treated and/or generated A process for cleaning apparatus in which (meth)acrylic acid-containing organic solvents have been treated and/or generated and contain fouling and/or polymer and residues of organic solvent, in which the apparatus contents are subjected to a steam distillation in t... | 10/30/2007 |
| 7267775 | Gas processing method using a filtered glycol solution The invention relates to a method and to a plant for processing a gas by means of a glycol solution wherein a feed comprising a gas, a glycol, water and salts is subjected to a first stage (5) of separating the gas from a liquid effluent and said liquid efflu... | 09/11/2007 |
| 7265241 | Method for purifying (meth)acrylic acid A method for purifying a crude (meth)acrylic acid obtained by a vapor phase catalytic oxidation method, characterized in that the crude (meth)acrylic acid having most parts of water and acetic acid removed therefrom, is fed to and distilled in a first distillation c... | 09/04/2007 |
| 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 |
| 7247202 | Process for the conversion of a fluid phase substrate by dynamic heterogeneous contact with a solid agent A process for the conversion of a substantially fluid phase substrate by heterogeneous contact of the substrate or a fragment or derivative thereof with a substantially solid phase agent wherein the solid phase agent is comprised as a surface of a support element or... | 07/24/2007 |
| 7238844 | Olefin oligomerization This invention is to a method of oligomerizing an olefin feed stream. The olefin feed stream contains at least one C2 to C12 olefin to obtain an olefin feed stream and has less than 1,000 ppm by weight oxygenated hydrocarbon. The olefin is olig... | 07/03/2007 |
| 7238848 | Method for separating dimethyl ether from an olefin-containing product stream A method for processing an olefin-containing product stream that contains dimethyl ether as a by-product is described. Such a product stream arises, for example, in the synthesis of olefin from methanol. For separation of the dimethyl ether from the product stream, ... | 07/03/2007 |
| 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 |
| 7226527 | Method for recovering crude 1,3-butadiene by extractive distillation from a Ccut A process for recovering crude 1,3-butadiene from a C4 fraction by extractive distillation using a selective solvent in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column to form a first subreg... | 06/05/2007 |
| 7214846 | Recovery of ethylene and propylene from a methanol to olefin reaction system The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetyl... | 05/08/2007 |
| 7208650 | Recovery of ethylene and propylene from a methanol to olefin reaction system The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetyl... | 04/24/2007 |
| 7208632 | Separation of 6-aminocapronitrile and hexamethylenediamine from a mixture comprising hexamethylenediamine, 6-aminocapronitrile and tetrahydroazepine The invention relates to the field of separation by distillation of 6-aminocapronitrile (ACN) and hexamethylenediamine (HMD) from a mixture comprising ACN, HMD, tetrahydroazepine (THA), adiponitrile (ADN) and low boilers (LB). Also disclosed is a method for producin... | 04/24/2007 |
| 7182840 | Method and device for exploiting heat resulting from the production of 1,2-dichloroethane The invention relates to a method and a device for the optimal use of reaction heat resulting from the production of 1,2-dichloroethane from ethene and chlorine. The aim of the invention is achieved by extracting reaction heat liberated during the reaction of chlori... | 02/27/2007 |
| 7166741 | Process for producing (meth) acrylic acid compound A process for producing a (meth)acrylic acid compound, which comprises distilling acrylic acid, methacrylic acid (these will hereinafter generally be referred to as “(meth)acrylic acid”) or an ester thereof (these will hereinafter generally be referred to as “... | 01/23/2007 |
| 7147757 | Method for separating an azepine derivative out of a mixture containing an amine an azepine derivative The invention relates to a method for separating by distillation a portion or the entirety of an azeptine derivative (III), which is selected from the group consisting of aminohexylidene imine, tetrahydroazepine, hexylhexahydroazepine and of aminohexylhexahydroazepi... | 12/12/2006 |
| 7128813 | Process for manufacturing high purity methacrylic acid A process for the high yield production of high purity glacial methacrylic acid (“HPMAA”) with minimization of decomposition of hydroxy isobutyric acid (HIBA). The HPMAA is substantially pure, specifically 99% pure or greater with a water content of 0.05% or les... | 10/31/2006 |
| 7125475 | Nitrosophenols and C-nitrosoanilines as polymerization inhibitors Inhibitor blends that include both nitrosophenols and nitrosoanilines, optionally in combination with air or oxygen, reduce the premature polymerization of ethylenically unsaturated monomers. unsaturated monomers. ... | 10/24/2006 |
| 7119128 | Method for producing acrylate adhesive materials A process for preparing pressure sensitive adhesives based on acrylate hotmelt, in which a monomer mixture including at least the following monomers (a) 70 to 100% by weight of compounds from the group of (meth)acrylic acid and the derivatives thereof c... | 10/10/2006 |
| 7074971 | Recovery of ethylene and propylene from a methanol to olefin reaction system The present invention provides new highly-efficient separation processes and systems for separating polymerization-grade ethylene and propylene from an initial effluent stream comprising ethane, ethylene, propylene, dimethyl ether, and one or more of propane, acetyl... | 07/11/2006 |
| 7060866 | High pressure separation of dimethyl ether from an olefin stream Disclosed is a method of removing dimethyl ether from an ethylene and/or propylene containing stream. Dimethyl ether is removed at a high pressure, preferably in a distillation column. The high pressure separation has the benefit of providing a relatively low bottom... | 06/13/2006 |
| 7060865 | Recovery of C4 olefins from a product stream comprising C4 olefins, dimethyl ether and C5+ hydrocarbons Disclosed is a process for removing DME from a stream containing C4 olefins. The process includes providing a first stream comprising C4 olefins, C5+ hydrocarbons, DME, and methanol. The first stream is separated into a second stream comprising the C4 olefins and th... | 06/13/2006 |
| 7029556 | Method for purifying (meth)acrylic monomers by distillation The invention concerns a method of purifying a (meth) acrylic monomer selected among (meth) acrylic acids and their esters, by distillation in the presence of at least a polymerisation inhibitor requiring input of oxygen and/or an inhibitor having better efficacy in... | 04/18/2006 |
| 7030284 | Method and reactor system for converting oxygenate contaminants in an MTO reactor system product effluent to hydrocarbons Disclosed is a method and reactor system for converting oxygenate and/or olefin contaminants in a methanol to olefin reactor system product effluent to hydrocarbons, including paraffin compounds, preferably over a sulphided catalyst of the type Nickel or Cobalt comb... | 04/18/2006 |
| 7000410 | Apparatus and method for producing water from air An apparatus and method are extracting water from the ambient air comprising drawing air through an particle ionizer grid, evaporator plates of a refrigerant system the system and recirculating the ionized air and mixing said ionized air with ambient air and recycli... | 02/21/2006 |
| 6979426 | Biodiesel production unit In a first aspect, systems and methods for producing biodiesel fuel include a modular production unit incorporated onto a single platform or into a housing for ease of relocatability. The modular production unit preferably includes a mixing unit, a reactor unit, a s... | 12/27/2005 |
| 6972075 | Method for removing 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine The invention relates to a method for removing, by distillation, 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine, by a) removing the hexamethylenediamine from the mixture while obtaining a mixture (I) that ... | 12/06/2005 |
| 6956101 | Method and installation for extracting a monomer from an aqueous slurry containing a polymer Process and installation for extracting a monomer from an aqueous broth of a polymer, in which, after the broth has been heated, the broth is subjected to a depressurization in a depressurization chamber and is then introduced into a vertical column, divided into se... | 10/18/2005 |
| 6911121 | Method and apparatus for simultaneous heat and mass transfer utilizing a carrier-gas The present application is directed to a continuous contacting apparatus for separating a liquid component from a liquid mixture. The apparatus comprises: (i) an evaporation chamber (15) having first and second ends, an inlet (50) and an outlet (55 | 06/28/2005 |
| 6863779 | Distillation of styrene A process for the distillation of vinylaromatic monomers in the presence of 4-tert-butylcatechol (TBC) and oxygen, wherein no aromatic nitro or amino compound is present in any effective amount. The process is particularly suitable for destabilizing and purifying st... | 03/08/2005 |