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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 8303686 | Panel and use of such a panel in a device for cleaning gases by removing impurities therefrom The invention relates to a panel, comprising: two plates of substantially equal dimensions positioned on each other; which plates are connected medium-tightly to each other along their peripheral zones; which plates enclose a cavity; a feed for feeding a liquid, in ... | 11/06/2012 |
| 8038774 | Ship flue gas desulphurization method and equipment This invention involves ship flue gas desulphurization method and system. It employs seawater to reduce SO2 and other pollutant discharged by ship. The method includes seawater scrub, acidic seawater transfer, deacidification, and discharge processes. The... | 10/18/2011 |
| 7828880 | Gas collection method and apparatus therefor A liquid film is formed on the surface of a porous body provided with a hydrophobic layer and hydrophilic layer, by moving thereon an ionic liquid having a selective absorption capacity of specific gas, and the specific gas within the gas to be processed is absorbed... | 11/09/2010 |
| 7819952 | High volume, low back-pressure gas scrubber In one aspect of the invention there is provided a gas scrubbing system for removing contaminants from a flow of fluid, comprising a container having an interior volume, an inlet for receiving the flow of fluid and an outlet for dispensing the stream of fluid, a tre... | 10/26/2010 |
| 7520917 | Devices with extended area structures for mass transfer processing of fluids A microchannel device includes several mass transfer microchannels to receive a fluid media for processing at least one heat transfer microchannel in fluid communication with a heat transfer fluid defined by a thermally conductive wall, and at several thermally cond... | 04/21/2009 |
| 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 |
| 7329308 | Air handling and chemical filtration system and method The present invention relates to systems and methods for controlling humidity and temperature in gases or air streams used in semiconductor processing systems. These systems and methods can be used in combination with systems and methods for contaminant detection an... | 02/12/2008 |
| 7306653 | Condensing deaerating vent line for steam generating systems The present invention comprises an apparatus and method for efficiently venting impurities from a heat recovery steam generator system by concentrating the impurities in a condensing deaerating vent line 40 and then venting a proportionately small amount of s... | 12/11/2007 |
| 7183428 | Method for production of acrylic acid A method for producing acrylic acid by using an acrylic acid-containing solution of high concentration without azeotropic distillation is provided. This method of producing acrylic acid comprises introducing an acrylic acid-containing gas obtained by catalytic gas p... | 02/27/2007 |
| 7179875 | Method for producing water-absorbent resins In a process for preparing water-absorbent resins based on acrylic acid, crude acrylic acid is firstly isolated from the reaction gases from the catalytic gas-phase oxidation of propane, propylene and/or acrolein. This is treated with an aldehyde scavenger and pure ... | 02/20/2007 |
| 7163647 | Process for the production of synthesis gas from heavy charges such as heavy crude oils and distillation residues by means of partial oxidation Process for the production of synthesis gas from heavy charges comprising a partial oxidation of heavy charges with oxygen or air enriched in oxygen in the presence of vapour, carried out at temperatures higher than 1000° C. and pressures equal to or higher than 20... | 01/16/2007 |
| 7160362 | Method and device for cleaning air A method of cleaning air, including a humidifying operation for humidifying the air containing chemical contaminants by a humidifier and taking a part of the gaseous contaminants in the air into excessive moisture to remove the contaminants from the air, and a dehum... | 01/09/2007 |
| 7160348 | Mist elimination hood A mist elimination device in the form of a hood for the removal of moisture from a gas stream treated by a WESP includes a series of gutters on the outer surface of the hood to trap liquid droplets and direct the moisture to channels to drain to the lower region of ... | 01/09/2007 |
| 7147692 | Air cleaning apparatus and method for cleaning air The method involves contacting the air with an aqueous or non-aqueous liquid in a stand-alone system. The air may be brought into contact with the liquid using a number of different types of apparatus, including a packed column scrubber. The liquid may be non-evapor... | 12/12/2006 |
| 7011696 | Elimination process of fluorinated anionic surfactants An elimination process of fluorinated anionic sufactants from exhausted gaseous streams, wherein the gaseous stream is put into contact with aqueous solutions having in the range from 3.5 to 13.8, the aqueous solution density being lower than 1.05 g/cm3, ... | 03/14/2006 |
| 6679939 | Fractional condensation of a product gas mixture containing acrylic acid In a process for the fractional condensation of an acrylic acid-containing product gas mixture of a gas-phase partial oxidation of C3 precursors of acrylic acid with molecular oxygen under heterogeneous catalysis, the separation column used con... | 01/20/2004 |
| 6238462 | Methods for the separation of compounds from acidic aqueous solutions A method is disclosed for recovering germanium from a gaseous mixture which includes a germanium-containing compound in vapor or particulate form, acid in vapor form, and water vapor. The gaseous mixture is contacted with a liquid containing water under c... | 05/29/2001 |
| 5928412 | Method and apparatus for cleaning a vapour A method is disclosed by which vapour is cleaned of gaseous impurities during evaporation of polluted liquids. Vapour is conducted via a boiler, a compressor to a heat exchanger (12) in which condensation takes place. In order to clean the vapour, a scrub... | 07/27/1999 |
| 5629258 | Flat structural elements and a packing composed of such structural elements A flat structural element has a plurality of openings which are distributed according to a predetermined pattern for use in packings. Every opening is delimited by the edges, which extend at an angle to each other or are curved. The structural element is ... | 05/13/1997 |
| 5470557 | Zeolites Crystals of the Zeolite Analcime (Analcite) Na2 O.Al2 O3.4SiO.sub.2.2H.sub.2 O are provided having a largest dimension greater than 50 micron. A method for preparing such crystals by mixing aqueous solutions of aluminium s... | 11/28/1995 |
| 5332496 | System for performing catalytic dehalogenation of aqueous and/or non-aqueous streams A system for removing contaminants from a solution is provided. A supply tank holds the contaminated solution and a reactor containing a catalyst receives the contaminated solution from the supply tank and further receives hydrogen for reacting with the c... | 07/26/1994 |
| 5231836 | Two-stage condenser First and second indirect contact condensing heat exchangers are used to separate gases from a mixture of condensible and non-condensible gases, such as the vapor from the last stage of a black liquor evaporation plant of a pulp mill. The mixture of gases... | 08/03/1993 |
| 5232676 | Process for the biological purification of waste air streams In a process for the biological elimination of halogen- and sulfur-containing gaseous pollutants from a waste air stream, the waste air stream is passed through an intermittently moistened trickling filter tower. In a preferred variant of the process, ind... | 08/03/1993 |
| 5173264 | High throughput liquid absorption preconcentrator sampling instrument A system for detecting trace concentrations of an analyte in air includes a preconcentrator for the analyte and an analyte detector. The preconcentrator includes an elongated tubular container comprising a wettable material. The wettable material is conti... | 12/22/1992 |
| 5171557 | Method for silicon nitride precursor solids recovery Method and apparatus are provided for collecting reaction product solids entrained in a gaseous outflow from a reaction situs, wherein the gaseous outflow includes a condensable vapor. A condensate is formed of the condensable vapor on static mixer surfac... | 12/15/1992 |
| 5147422 | Paint spray booth A paint spray booth is provided which comprises a floor covered with flowing liquid, the floor including an elongated passageway formed therein defined by a pair of passageway walls and having an entrance opening and an exit opening. The paint spray booth... | 09/15/1992 |
| 4981021 | Heat exchanger, system, and method for using the same A heat exchanger according to the present invention comprises a housing for containing an upper and a lower layer of fluid, means for preventing intermixing of the two fluid, and heat transfer means for enhancing the transfer of heat between the layers. S... | 01/01/1991 |
| 4942135 | Method for preconcentrating a sample for subsequent analysis A system for analysis of trace concentration of contaminants in air includes a portable liquid chromatograph and a preconcentrator for the contaminants to be analyzed. The preconcentrator includes a sample bag having an inlet valve and an outlet valve for... | 07/17/1990 |
| 4902318 | Inlet apparatus for gas-aerosol sampling An inlet apparatus for gas-aerosol sampling comprises an elutriator column and an impactor member. The elutriator column comprises an inlet and an impact accelerator jet outlet, and the inner surface of the column is provided with a coating of polytetrafl... | 02/20/1990 |
| 4883505 | Methods and apparatus for atmospheric sampling and analysis of trace contaminants This invention relates to a method and device for continuously removing and concentrating specific molecules or substances from a gas stream and depositing such molecules or substances in a liquid film stream in a controlled and quantitative fashion. The ... | 11/28/1989 |
| 4844722 | Air pollution prevention device An air pollution prevention device that is designed in the preferred embodiment to operate downstream from an existing muffler. The device comprises an oil filled lower chamber with turbulence causing means such as plastic netting through which the exhaus... | 07/04/1989 |
| 4705542 | Production of synthesis gas Deposition of ash in the outlet conduit of a synthesis gas quench chamber is reduced or eliminated by providing a streamlined configuration at the mouth and throat of the outlet conduit.... | 11/10/1987 |
| 4675031 | Phoretic enhanced-gravity particulate removal system A phoretic enhanced-gravity particulate removal system (10) is provided for removing particulates and gaseous pollutants from a particulate laden gas. The particulate laden gas is initially brought into a housing (12) between a plurality of upper and lowe... | 06/23/1987 |
| 4544380 | Air conditioner for a coating booth An air conditioner for a coating booth is constructed so as to intake the air through a filter for eliminating dust, to heat the air by a plate fin coil heater to the extent that it is not excessively saturated, to atomize the steam directly into the air ... | 10/01/1985 |
| 4529417 | Process for the isothermal absorption of ethylene oxide using film absorbers This invention relates to a process for the isothermal absorption of the ethylene oxide contained in the gas from an ethylene oxide production plant. This process is characterized in that the gas is firstly cooled to a temperature of between 5° and 60° ... | 07/16/1985 |
| 4487616 | Method for removing solvent from solvent vapor-laden air exiting a dry-cleaning machine A method for recovering hydrocarbon and hydrocarbon derived solvents from solvent laden air. This method includes the steps of moving the solvent laden air through a first chamber; moving a film of liquid coolant, which liquid coolant is cooled to a tempe... | 12/11/1984 |
| 4466808 | Method of cooling product gases of incomplete combustion containing ash and char which pass through a viscous, sticky phase Hot gases containing ash and char which pass through an undesirable viscous, sticky phase on cooling through an intermediate temperature range, are cooled in a first cooling zone including a falling film of cooling liquid and a spray of cooling liquid fol... | 08/21/1984 |
| 4427416 | Processes for extracting oxygen from fluids using immobilized hemoglobin An oxygen carrier, capable of reversibly binding and releasing oxygen, immobilized in a polymer matrix and a method of recovering dissolved oxygen from fluids utilizing the same.... | 01/24/1984 |
| 4376109 | Process and apparatus for disposal of noxious vapors emanating from wort and mash during production of beer in brewery installations Process and apparatus for disposal of noxious vapors emanating in brewery installations from treatment of wort and mash during the production of beer and for recovery of excess energy therefrom which includes passing the vapors emanating from the treatmen... | 03/08/1983 |
| 4371563 | Fine particle filter system having low pressure drop for gaseous flow systems An overspray filter collector unit for a plasma spray system filters fine, relatively small particulate from the overspray upstream of the vacuum pumps. The filter collector unit includes a hollow tank having a pool of oil at the bottom thereof having a t... | 02/01/1983 |
