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| Number | Title | Issue Date |
| 7410556 | Purification of aqueous solutions of organic acids The invention relates to a method and a device for the purification of an aqueous solution of an organic acid having a boiling point at atmospheric pressure of less than 450° C., which further has approximately 275 g carboxylate ions/1 or less, preferably 250 g car... | 08/12/2008 |
| 7384518 | Method for purifying lactams A method and a plant are disclosed for purifying lactams, particularly lactams obtained by cyclizing hydrolysis of aminonitrile. The purification of ε-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile is described which includes eliminating the ammo... | 06/10/2008 |
| 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 |
| 7157598 | Method for producing an aqueous alkali acrylate solution A process prepares an aqueous alkali metal acrylate solution by distillatively removing acrylic acid from a mixture as vapors and taking up the vapors immediately from the gas phase into an aqueous alkali solution. ... | 01/02/2007 |
| 7153991 | Rochow-Müller direct synthesis using nanosized copper catalyst precursors A Direct Synthesis of making organohalosilanes with greater selectivity to the dialkyldihalosilane is disclosed herein. By using nanosized copper catalyst precursors, and preferably nanosized promoters as well, D/T values of greater than 10, and preferably greater t... | 12/26/2006 |
| 7022844 | Amide-based compounds, production, recovery, purification and uses thereof Methods are disclosed of producing and purifying at least one amide. In accordance with one of the methods disclosed herein, the at least one amide is produced by providing an organic liquid comprising at least one oxime, providing at least one catalyst, adding the ... | 04/04/2006 |
| 6998026 | Method for producing tertiary C-C-alkyl esters of (meth)acrylic acid A tert-C4–C8-alkyl (meth)acrylate is prepared by reacting (meth)acrylic acid with an olefin of the formula where R1 and R2, which may be i... | 02/14/2006 |
| 6780288 | Process for the manufacture of concentrated solutions Process for the manufacture of a concentrated solution, like a concentrated aqueous hydrogen peroxide solution, by distillation and evaporation of a dilute solution, in which the distillation and the evaporation are carried out in two distinct pieces of equipment wh... | 08/24/2004 |
| 6746567 | Microstructured surface film assembly for liquid acquisition and transport A film or tape has one of its major surfaces defined by microstructured features including a plurality of channels defined by spaced apart protrusions. The microstructured film is able to acquire liquids and to control the directional transport of such liquids for s... | 06/08/2004 |
| 6635150 | Method for distilling a fluid with horizontal vapor transfer into a condensation zone and modular device for implementing said method A method for distilling a fluid which is useful, for instance, in eliminating salt from brackish and/or sea water includes percolating films on plates with multiple effects having several evaporating zones and condensation zones. The evaporation zones (EV... | 10/21/2003 |
| 6623546 | Method and installation for chemical purification of vapor in a dehydrator with mechanical vapor compression According to the invention, the vapor is taken from the condensation chamber of the dehydrator and, prior to being compressed and at a temperature substantially equal to 100° C., it is caused to pass in succession through a series of purifiers, and in ea... | 09/23/2003 |
| 6605191 | Method for reprocessing reaction mixtures containing diaryl carbonate A process for the work up of a reaction mixture obtained from the preparation of diaryl carbonate by direct carbonylation of aromatic hydroxy compounds is disclosed. The process entails obtaining a reaction mixture that contains diaryl carbonate, aromatic... | 08/12/2003 |
| 6423187 | Heat exchanger mechanism using capillary wipers for a thin film distiller A thin film distiller is provided which applies distilland to an evaporative side by the use of wicks which work by capillary action. The evaporated vapor is transferred to the condensate side after being compressed to a higher pressure where it is conden... | 07/23/2002 |
| 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 |
| 6336997 | Process for refining heat-deteriorative compound, contained in multi-component liquid mixture, by distillation A heat-deteriorative compound contained in a liquid mixture is refined by a distillation procedure using a distillation column in which a vapor fraction and a liquid fraction containing the heat-deteriorative compound are generated from the liquid mixture... | 01/08/2002 |
| 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 |
| 6258206 | Process for purifying condensate while evaporating waste liquors A process for evaporating spent liquor or other waste liquids from cellulose cooking, The evaporation is performed in a multiplicity of evaporators which are coupled in series and in which the evaporation is driven using the liquor steam. The condensates ... | 07/10/2001 |
| 6156160 | Alkylene carbonate process This invention concerns a process to provide high purity alkylene carbonate though use of multiple distillations wherein the unused fractions are recycled to the reactor.... | 12/05/2000 |
| 6152994 | Process for the purification of an alkanolamine A process for the purification of an aqueous alkanolamine which process involves subjecting the alkanolamine to a distillation process carried out in one or more film-type evaporators and involves at least two steps, wherein in the first step water is rem... | 11/28/2000 |
| 6048441 | Isolation of neopentyl glycol hydroxypivalate (NGH) Neopentyl glycol hydroxypivalate (NGH) is isolated from a mixture containing NGH, lower- and higher-boiling products and inorganic salts and purified in a two-stage process, wherein in a first separation stage, the inorganic salts and part of the higher-b... | 04/11/2000 |
| 5853549 | Desalination of seawater by evaporation in a multi-stack array of vertical tube bundles, with waste heat. A large and economical type of multi-stack vertical tube evaporator (MS-VTE) having units of multiple stacks of vertical tube bundles or stages mounted in a single vessel, and having its liquid feed pumped to the uppermost VTE bundle stack or stage and ha... | 12/29/1998 |
| 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 |
| 5660691 | Process for the production of tocotrienol/tocopherol blend concentrates Disclosed is an improved process for the preparation of tocotrienol/tocopherol blend concentrates from vegetable oil distillates which are enriched in tocotrienols. Tocotrienol/tocopherol blend concentrates are obtained containing 20-80% tocotrienols/toco... | 08/26/1997 |
| 5630914 | Method and apparatus for decontaminating a liquid A method for decontaminating a liquid of a contaminant having a vapor pressure which is higher than the vapor pressure of the liquid. A contaminated liquid is directed through an inclined conduit. A gas is directed into the inclined conduit, whereby the g... | 05/20/1997 |
| 5628901 | Vessel for treating liquids A single vessel with no moving parts is constructed to perform the functions of coalescing, vacuum dehydration, and thin film evaporation.... | 05/13/1997 |
| 5582692 | Method for the purification of vitamin E A method for the separation and purification in a single pass of a heat or oxygen-sensitive liquid feed, such as a plant derived liquid feed mixture of fatty acids, tocopherol compounds and sterols, into a low boiling point purified fraction of Vitamin E ... | 12/10/1996 |
| 5562808 | Method and apparatus for decontaminating a liquid surfactant of dioxane A method and apparatus are disclosed for decontaminating a liquid surfactant of a dioxane having a vapor pressure which is higher than the surfactant. A contaminated liquid surfactant is directed through an inclined conduit. A gas is directed into the inc... | 10/08/1996 |
| 5462643 | Method for reprocessing solvent mixtures containing constituents of low volatility and apparatus suitable therefor Reprocessing mixtures which contain organic solvents and constituents of low volatility and may contain water: includes introducing the mixture into a concentration apparatus of a solvent recovery system, concentrating the mixture in the concentration app... | 10/31/1995 |
| 5429721 | Process for preparing diacetoxybutene A process for preparing diacetoxybutene, including: reacting butadiene, acetic acid and oxygen in the presence of a palladium-based catalyst; feeding continuously the resulting reaction product into a first distillation tower; feeding continuously a withdrawn ... | 07/04/1995 |
| 5419815 | Process for purifying fatty acid amides The present invention relates to a process for purifying fatty acid amides, which contains the following process steps: neutralization of the fatty acid by addition of an aqueous alkaline solution and subsequent distillation of the neutralized mixture.... | 05/30/1995 |
| 5411640 | Centrifugal distillation apparatus The disclosed invention is an apparatus for the distillation of liquids. The apparatus has a plurality of vertically-stacked, parallel disks which are rotated. The liquid to be distilled is introduced into the center of the disk stack and migrates by cent... | 05/02/1995 |
| 5395483 | Rotary apparatus for combined multi flashing and boiling liquids A distillation apparatus by flashing and boiling of solution and condensing the resulting steam having a central rotating partitioned brine conduit with coupling to a two-disk centrifugal distributor and a wiping blade system in a chamber having at least ... | 03/07/1995 |
| 5370774 | Process for isolating pure diketene with recovery of materials of value The invention relates to a process for isolating pure diketene with recovery of materials of value by continuous, two-stage distillation of crude diketene at reduced pressure and with continuous reaction of the resulting distillation residue with acetic a... | 12/06/1994 |
| 5316628 | Process and device for the simultaneous transfer of material and heat A process for simultaneously exchanging material and for exchanging heat, material change being effected between a gas phase and at least one liquid phase by contact and passage in opposite directions of the gas phase and of the at least one liquid phase ... | 05/31/1994 |
| 5302255 | Reducing molecular weight distribution of polyether glycols by short-path distillation Polyether glycols, especially poly(tetramethylene ether) glycol (PTMEG) having a narrow molecular weight distribution of about 1.25 to 1.80, or dispersity of 1.05 to 1.90, are made by a process involving distilling the low molecular weight fraction in uni... | 04/12/1994 |
| 5271811 | Process for purifying 2-(4-isobutylphenyl)-propionic acid by vacuum distillation 2-(4-Isobutylphenyl)-propionic acid is purified by subjecting it to a vacuum rectification, in which the temperature is below the decomposition temperature of the acid.... | 12/21/1993 |
| 5211812 | Device for the recovery of a processed liquid in the form of a condensate on a liquid to be processed The invention relates to a device for the recovery of a processed liquid in the form of a condensate from a liquid to be processed by evaporation and condensation, having at least one first flow region which is provided in a working space for the developm... | 05/18/1993 |
| 5209827 | Process for the purification of hydroxypivalyl hydroxypivalate Disclosed is a process for the recovery of purified hydroxypivalyl hydroxypivalate (HPHP) from a crude, HPHP containing material containing inorganic catalyst residues and low-boiling and high-boiling (with respect to the boiling point of HPHP) impurities... | 05/11/1993 |
| 5208342 | Conversion of pyridine-2,3-dicarboxylic acid esters to cyclic anhydrides In one embodiment this invention provides a process for converting a pyridine-2,3-dicarboxylic acid diester to the corresponding cyclic anhydride directly, without any recovery and purification of the pyridine-2,3-dicarboxylic acid intermediate. An import... | 05/04/1993 |
| 5158651 | Process of centrifugally removing inorganic compounds from polyester glycol recovery bottoms A process for removing inorganic compounds from glycol recovery still bottoms resulting from the manufacture of poly(ethylene terephthalate), the novel process using a small amount of phosphoric acid to precipitate the antimony and then removing the titan... | 10/27/1992 |
