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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7968742 | Method and device for the sulfonation or sulfation of sulfonatable or sulfatable organic substances and for performing faster, strongly exothermic gas/liquid reactions A method and a device for the sulfonation or the sulfation of organic liquid raw materials with an SO3/air mixture and other reaction gases in order to perform rapid, highly exothermic gas-liquid reactions in conventional thin-layer falling-film reactors ... | 06/28/2011 |
| 7008603 | Process and apparatus for quantitatively converting urea to ammonia on demand Processes and apparatus for quantitatively converting urea to ammonia on demand are disclosed. One process includes the steps of: receiving a demand rate signal for ammonia; feeding reactants including urea and water into a reactor to provide a reaction mixture; and... | 03/07/2006 |
| 6895983 | Method and apparatus for dividing the flow of a gas stream An apparatus for dividing the flow of a gas stream and a method for controlling the flow division of a gas stream are disclosed, the apparatus including an inlet conduit for receiving the gas stream, outlet conduits in fluid communication with the inlet conduit for ... | 05/24/2005 |
| 6887449 | Method of quantitatively producing ammonia from urea Methods and apparatus for continuously, quantitatively producing gaseous ammonia from urea, including the steps of: dissolving urea in water to form concentrated aqueous urea comprising at least 77 wt. % urea; continuously feeding the concentrated aqueous urea into ... | 05/03/2005 |
| 6761868 | Process for quantitatively converting urea to ammonia on demand Processes and apparatus for quantitatively converting urea to ammonia on demand are disclosed. One process includes the steps of: receiving a demand rate signal for ammonia; feeding reactants including urea and water into a reactor to provide a reaction mixture; and... | 07/13/2004 |
| 6572835 | Method and apparatus for producing gaseous sulfur trioxide An apparatus and method for producing sulfur comprises a vessel containing a plurality of spaced-apart channels each having an upstream end communicating with an upstream manifold and a downstream end communicating with a downstream manifold. Each channel... | 06/03/2003 |
| 6511644 | Method for removing contaminants in reactors The invention provides a method and apparatus for maintaining the operation of reactors by removing contaminant matter arising from the solid reactant(s) used as a feedstock in such systems, by either intermittent or continuous means.... | 01/28/2003 |
| 6058623 | Apparatus and process for removing volatile components from a composition Apparatus and processes for removing volatile components from a composition utilize a dryer having an inlet chamber and a plurality of channels. A flow restriction is disposed immediately upstream of the inlet of each channel with respect to a direction o... | 05/09/2000 |
| 5723433 | Sovent removal process A method of removing solvents from a paste includes introducing a heated paste into a channel of a dryer under pressure selected so as to avoid flashing of any of the components of the paste. At the inlet of the channel, the pressure is dropped, resulting... | 03/03/1998 |
| 5597403 | Flue gas conditioning system for intermittently energized precipitation A system for preconditioning flue gas to be treated in an electrostatic precipitator having a set of electrostatic elements and a power supply, which supplies an intermittent power to the electrostatic elements, includes a source of a conditioning agent, ... | 01/28/1997 |
| 5591249 | Flue gas conditioning method for intermittently energized precipitation A method is used for preconditioning flue gas to be treated in an electrostatic precipitator having a set of electrostatic elements which are intermittently energized by a power supply. The method uses a current sensor and a voltage sensor to detect the c... | 01/07/1997 |
| 5587500 | Sulfonation of fatty acid esters A sulfonation process includes the process steps of air sulfonating a fatty acid alkyl ester feedstock, bleaching the crude product with co-addition of up to about 40 wt. % of an alcohol based upon the weight of the crude product. The bleaching/alcohol ad... | 12/24/1996 |
| 5244642 | Method for conditioning flue gas A method for conditioning flue gas to improve the removal of fly ash by an electrostatic precipitator employs a relatively high concentration (4-71/2%) of SO3 conditioning agent. The SO3 is formed by combusting sulfur and excess air ... | 09/14/1993 |
| 5136088 | Sulfonation process for viscous sulfonic acid A process is provided for sulfonating an organic reactant which, upon sulfonation, produces a viscous sulfonation reaction product having a viscosity substantially greater than 1,500 centipoises at a reaction temperature wherein the sulfonation reaction p... | 08/04/1992 |
| 4779207 | SO3 flue gas conditioning system An air pollution control system for injecting a conditioning agent into the flue gas of a power generator. The conditioning agent changes the resistivity of particulate matter in the flue gas, rendering the particulate matter more easily able to accept an... | 10/18/1988 |
| 4587029 | Intermediate product for use in producing a detergent bar Anhydrous fatty alcohol sulfuric acid or ethoxylated fatty alcohol sulfuric acid is neutralized with dry sodium carbonate powder in the presence of powdered sodium tripolyphosphate in a high shear mixer. The dry, powdered, neutralized reaction product is ... | 05/06/1986 |
| 4515707 | Intermediate product for use in producing a detergent bar and method for producing same Anhydrous fatty alcohol sulfuric acid or ethoxylated fatty alcohol sulfuric acid is neutralized with dry sodium carbonate powder in the presence of powdered sodium tripolyphosphate in a high shear mixer. The dry, powdered, neutralized reaction product is ... | 05/07/1985 |
| 4385593 | Introduction of alcohol-water mixture into gasoline-operated engine Alcohol and water are mixed as liquids in a volume ratio of water to alcohol in the range 0.3-1.0 to 1. The liquid mixture is heated in heat exchanging relation with the exhaust conduit of a gasoline operated internal combustion engine, to convert the mix... | 05/31/1983 |
| 4374058 | Method for producing powdered detergent containing alpha olefin sulfonate A first slurry containing alkyl benzene sulfonate is spray-dried to form dry, powdery particles which are introduced into a rotary drum mixer along with dry, powdery particles of other detergent ingredients. The dry, powdery particles are lifted and dropp... | 02/15/1983 |
| 4347100 | Strength of paper from mechanical or thermomechanical pulp An additive comprising an anionic organic surface active agent is incorporated into mechanical or thermomechanical pulp at an elevated temperature and pressure. The additive causes dispersion of lignin and retards redeposition of lignin so that the bursti... | 08/31/1982 |
| 4311552 | Deinking of newsprint Waste newsprint is defibered in an aqueous bath to which is added a deinking agent. The resulting slurry or pulp is rinsed, drained and formed into paper sheets. The deinking agent is a C14 to C20 alpha olefin sulfonate or a mixture ... | 01/19/1982 |
| 4267119 | Sulfonating method An organic reactant is sulfonated by injecting it into a stream of gas comprising sulfur trioxide, at a venturi, and the resulting reaction mixture is quenched with a stream of cooled, recycled reaction product immediately downstream of the venturi in a c... | 05/12/1981 |
| 4251456 | Method for treating effluent gas from sulfonation process A relatively large amount of SO2 effluent gas from a sulfonation process is converted to SO3 and recycled back to the sulfonation process as part of the SO3 sulfonating agent. The rest of the SO3 used as the sul... | 02/17/1981 |
| 4239035 | Solar heating method A liquid containing carbon particles in a predetermined concentration is circulated through a multiplicity of channels in a solar panel to heat the liquid which is then circulated through a heat exchanger. The solar panel is clear and uncolored, and the s... | 12/16/1980 |
| 4216001 | Gas scrubbing apparatus A scrubbing system including scrubbers having straight through or direct line gas flow, with steam pretreatment of the gases supplied to the scrubber. The scrubbing solution may be recycled. Where steam is present in the process, the effluent gas is parti... | 08/05/1980 |
| 4185030 | Sulfonating method An organic reactant is sulfonated by injecting it into a stream of gas comprising sulfur trioxide, at a venturi, and the resulting reaction mixture is quenched with a stream of cooled, recycled reaction product immediately downstream of the venturi in a c... | 01/22/1980 |
| 4171243 | Spray drying method A method for spray drying an aqueous slurry in a spray drying tower. Hot effluent gases containing steam are divided into two portions. One portion is heated and recycled to the spray drying tower as part of the heated gas stream which dries the slurry. T... | 10/16/1979 |
| 4113438 | Sulfonating apparatus An apparatus is provided wherein organic reactant is sulfonated by injecting it into a stream of gas comprising sulfur trioxide, at a venturi, and the resulting reaction mixture is quenched with a stream of cooled, recycled reaction product immediately do... | 09/12/1978 |
| 4096236 | Gas scrubbing method A scrubbing system including scrubbers having straight through or direct line gas flow, with steam pretreatment of the gases supplied to the scrubber. The scrubbing solution may be recycled. Where steam is present in the process, the effluent gas is parti... | 06/20/1978 |
| 4067663 | Sewage pump priming system A sewage pump priming system including a sewage pump disposed above a sump for holding sewage to force sewage from the sump through a sewage discharge conduit, a priming chamber receiving sewage from the sewage discharge conduit to be partially filled wit... | 01/10/1978 |
