Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Number | Title | Issue Date |
| 7371363 | Methods of purifying hydrogen fluoride Provided are methods of producing anhydrous hydrogen fluoride comprising: providing a mixture comprising hydrogen fluoride and at least one halogenated hydrocarbon; and extracting hydrogen fluoride from the mixture by contacting the mixture with a solution of less t... | 05/13/2008 |
| 7339088 | Alkylbenzene refining process and apparatus Improved processes and apparatus use a finishing column with a mid-cut that provides alkylbenzene products of high purity containing less than about 1 ppmw benzene and less than about 50 ppmw heavies while accommodating enhancements in the efficiencies and the capac... | 03/04/2008 |
| 7311813 | Distillation sequence for the purification and recovery of hydrocarbons This invention is an improved distillation sequence for the separation and purification of ethylene from a cracked gas. A hydrocarbon feed enters a C2 distributor column. The top of the C2 distributor column is thermally coupled to an ethylene distributor column, an... | 12/25/2007 |
| 7241928 | Process for the manufacture of halocarbons and selected compounds and azeotropes with HF A liquid phase process is disclosed for producing halogenated alkane adducts of the formula CAR1R2CBR3R4 (where A, B, R1, R2, R3, and R4 are as defined in the specification) whic... | 07/10/2007 |
| 7183448 | Azeotropic composition, comprising 1, 1, 1, 3,3-pentafluoropropane and 1, 1, 1-trifluoro-3-chloro-2-propene, method of separation and purification of the same, and process for producing 1, 1, 1,3,3-pentafloropropane and 1, 1, 1-trifluoro-3-chloro-2-propene A mixture comprising at least 1,1,1,3,3-pentafluoropropane and 1,1,1-trifluoro-3-chloro-2-propene is subjected to a distillation operation, and thereby, a distillate comprising an azeotropic composition consisting substantially of 1,1,1,3,3-pentafluoropropane and 1,... | 02/27/2007 |
| 6936724 | Process for producing epsilon-caprolactone A process produces ε-caprolactone by the oxidation of cyclohexanone by feeding a crude reaction mixture to a first distillation column; distilling off a first distillate containing low boiling components including unreacted cyclohexanone from the top of the first d... | 08/30/2005 |
| 6579419 | Method for purifying norbornene by distillation For the purification of the norbornene obtained by the reaction of dicyclopentadiene or cyclopentadiene and ethylene, the crude reaction mixture containing light impurities having boiling temperatures lower than that of norbornene; medium-heavy impurities... | 06/17/2003 |
| 6015875 | Process for making acetals Acetals are produced from the reaction of aldehydes and alcohols, e.g. methylal by the reaction of methanol and formaldehyde, by the reaction in a reaction distillation column of the alcohol and aldehyde in the presence of a catalyst and the concurrent fr... | 01/18/2000 |
| 5853551 | Process for the separation of alpha-olefins by distillation of an effluent comprising ethylene and 1-butene The invention concerns a process for the separation of a mixture comprising ethylene, 1-butene, alpha-olefins containing at least 6 carbon atoms per molecule and possibly heavier hydrocarbon products, the ethylene content of the mixture being in the range... | 12/29/1998 |
| 5804040 | Purification process for silane compound There is provided a purification process for dimethoxymethylsilane in which a mixture containing dimethoxymethylsilane and methanol is subjected to a first distillation step in which the mixture is distilled in the presence of methyl formate or methoxytri... | 09/08/1998 |
| 5788818 | Process for the purification of acetone A process for the purification of raw acetone deriving from processes for the production of phenol acetone, impurity mainly due to cumene, water, aldehydes and methanol, the steps of: feeding the stream of raw acetone coming from the primary fractionation of ... | 08/04/1998 |
| 5723026 | Process for recovering pure benzene and pure toluene from aromatic hydrocarbon products The production of high purity benzene and high purity toluene is obtained by utilizing the initial gas separating column for the treatment of the aromatic containing starting material as a separating column for separating a benzene rich from a toluene ric... | 03/03/1998 |
| 5675054 | Low cost thermal coupling in ethylene recovery The invention is a process for reducing capital and energy costs in ethylene recovery. Moderate pressure processing and thermally coupled fractionation steps are achieved through the use of integrator columns. Ethylene separation from cracked gas originat... | 10/07/1997 |
| 5635590 | Process and polycondensation apparatus for the treatment of contaminated ethylene glycol The invention relates to a process for the treatment of contaminated ethylene glycol resulting during a polycondensation process for the production of polyester. In the course of this polycondensation process contaminated ethylene glycol is continuously p... | 06/03/1997 |
| 5498317 | Apparatus for treating chemical production plant process condensate An apparatus and method for treating chemical production plant process condensate such that a contaminant-rich stream and a relatively pure aqueous stream is separately recoverable from the condensate, wherein the contaminants are substantially removed fr... | 03/12/1996 |
| 5354431 | Plural stage drying and purification of propylene oxide Crude propylene oxide is purified by a distillation process wherein it is (a) extractively distilled in a first column using a C2 to C6 alkylene glycol extractive distillation agent to form a first overhead fraction comprising propyl... | 10/11/1994 |
| 5346595 | Process for the purification of a pentafluoroethane azeotrope The invention generally relates to a process for the purification of a component of a binary azeotrope in which the composition of the azeotrope changes by about 10 mole percent with pressure comprising: (a) subjecting a binary azeotrope to a distillation step... | 09/13/1994 |
| 5264117 | Distillation of hydrocarbons Where side stream distillate strippers are used in the distillation of hydrocarbons, the required size of the distillation column and the amount of stripping gas or vapor required are reduced by passing components stripped from the distillates through a p... | 11/23/1993 |
| 5211817 | Separation process A product stream containing, inter alia, HCl, HF and fluorocarbons which form close boiling point azeotropes with HF is subjected to distillation using sidestream rectification in order to effect energy efficient separation of selected fluorocarbon/HF aze... | 05/18/1993 |
| 5124004 | Distillation process for ethanol A method of distillation employing a heat pump (which may be driven by a compressor) using a vapor stream from within the distillation system as a heat source and a liquid stream from within the distillation system as a heat sink. The selection of heat-so... | 06/23/1992 |
| 5091057 | Stripping process for water removal from alcohol A process for obtaining a substantially dry alcohol from a mixture comprising alcohol and water in a non-azeotropic amount by utilizing at least a portion of the alcohol in the mixture as the stripping medium.... | 02/25/1992 |
| 5066365 | Process for the isolation of vinyl acetate by distillation The invention relates to a process for the isolation of vinyl acetate which involves not combining the bottom product of the recylced gas washings with the water-saturated vinyl acetate but rather introducing it to further multiple distillation columns fr... | 11/19/1991 |
| 5061349 | Method of isolating trioxane from aqueous trioxane solutions by distillative separation A method of isolating trioxane by distillative separation at atmospheric pressure without extraction steps from an aqueous trioxane solution having a trioxane concentration which does not exceed that concentration, which has an constant boiling azeotropic... | 10/29/1991 |
| 5035776 | Low energy extractive distillation process for producing anhydrous ethanol A thermally-integrated extractive distillation process for recovering anhydrous ethanol from fermentation or synthetic feedstocks has a distillation train of four columns. Two columns are preconcentrators operated in parallel. The remaining columns are an... | 07/30/1991 |
| 5031754 | Method of working up an overhead product of an extractive distillation of a hydrocarbon mixture and apparatus for same A hydrocarbon material of the starting product is separated in an extractive distillation column in which an N-substituted morpholine whose substituents do not have more than seven carbon atoms is used as a selective solvent. The overhead product comes do... | 07/16/1991 |
| 4963232 | Process for producing a purified hydrazine hydrate Provided by this invention is a process for producing a purified hydrazine hydrate having a low total organic carbon concentration and which involves: a first step which includes distilling an aqueous solution of hydrazine hydrate in the presence of at le... | 10/16/1990 |
| 4961826 | Distillation process for ethanol A method of distillation employing a heat pump (which may be driven by a compressor) using a vapor stream from within the distillation system as a heat source and a liquid stream from within the distillation system as a heat sink. The selection of heat-so... | 10/09/1990 |
| 4925535 | Process for the production of an aromate concentrate suitable for use as blending component for gasification fuel The process for production of an aromate concentrate for use as a blending component for gasification fuel includes subjecting another feed hydrocarbon mixture to an extractive distillation using N-substituted morpholines as selective solvent in a extract... | 05/15/1990 |
| 4919765 | Process for the purification of tetrahydrofuran Tetrahydrofuran is recovered by a two stage distillation procedure from a crude hydrogenation product resulting from vapor phase hydrogenation of diethyl maleate and containing water, ethanol and a minor amount of n-butanol, and possibly also dissolved hy... | 04/24/1990 |
| 4900402 | Pervaporation process of separating a liquid mixture A pervaporation process for separating at least one component from a mixture of liquids, for example for separating ethanol from a fermentation mass, by a series of three separation steps: separating the mixture by a first pervaporation to form a first pe... | 02/13/1990 |
| 4879407 | Process for the preparation of ethyl trifluoroacetate A process for the preparation of ethyl trifluoroacetate, in which: in a first stage, trifluoroacetic acid is brought into contact with a slight excess of ethanol in the presence of concentrated sulfuric acid and a solvent, the solvent having a boiling point hi... | 11/07/1989 |
| 4857151 | Phenol purification Crude phenol containing methyl benzofuran and other impurities is distilled in the presence of water to recover a phenol bottoms having a reduced quantity of impurities. The water-phenol overhead is cooled to separate a water phase essentially free of met... | 08/15/1989 |
| 4820385 | Purification of alkyl glyoxylate in a continuous column by azeotropic distillation An improved process for separating high purity alkyl glyoxylate from complex mixtures containing alkyl glyoxylate, alkyl glycolate, water, alcohol and miscellaneous impurities by an azeotropic distillation operation using an azeotroping agent selected fro... | 04/11/1989 |
| 4814021 | Apparatus and method for reclassifying electrical apparatus contaminated with PCB A method for cleaning and reclassifying electrical apparatus designed for use with PCB fluid electrolytes is described which is capable of operation on the site of the equipment being cleaned and while said equipment is energized.... | 03/21/1989 |
| 4802956 | Process for the purification of dimethylether by distillation The instant invention relates to a process for the purification of dimethylether, which contains impurities, by feeding a mixture which contains the dimethylether at specific trays to a distillation column and withdrawal of the dimethylether and of impuri... | 02/07/1989 |
| 4767869 | Process for the production of gamma-butyrolactone A process is described for the production of substantially pure gamma-butyrolactone from a feed mixture containing a major amount of gamma-butyrolactone and a minor amount of diethyl succinate which comprises fractionally distilling the mixture in a fract... | 08/30/1988 |
| 4759826 | Process for purifying thionyl chloride An improved process for purifying thionyl chloride by the double distillation of an impure mixture of thionyl chloride, sulfuryl chloride, sulfur monochloride, sulfur dichloride and sulfur dioxide is disclosed. The double distillation process is conducted... | 07/26/1988 |
| 4744869 | Process for purifying methanol A process for purifying methanol which comprises introducing crude synthetic methanol obtained by catalytic reaction of carbon oxide and hydrogen into a rectifying column either as such or after it is first introduced into a topping column and distilled w... | 05/17/1988 |
| 4730082 | Process for the preparation of methyltrifluoroacetate A process for the preparation of methyltrifluoroacetate. Trifluoroacetic acid is contacted with an excess of methanol and distilled to form a methyltrifluoroacetate/methanol azeotrope. The azeotrope is contacted with trifluoroacetic acid in the presence o... | 03/08/1988 |
| 4717454 | Process for removing acetone from reaction mixtures of carbonylation reactions A process for removing by product acetone from reaction mixtures obtained by reacting methyl acetate and/or dimethylether with carbon monoxide at elevated temperatures to obtain acetic anhydride in the presence of a catalyst system consisting essentially ... | 01/05/1988 |
