Did You Know...
...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 |
| 4346010 | Process for recovering fine coal particles from slurry of finely divided coal Fine coal particles are recovered from a slurry of finely divided coal by mixing coarsely divided coal and a binder together to cause the binder to adhere to the surfaces of the coarsely divided coal pieces, mixing the slurry with the coal pieces having t... | 08/24/1982 |
| 4294705 | Method and an agent for chemical purification of water by means of chemical precipitation and magnetic sludge separation A method and an agent for chemical purification of water is provided, especially waste water with subsequent magnetic sludge separation. A precipitation agent comprising as component aluminium sulphate and/or iron sulphate is used together with a magnetic... | 10/13/1981 |
| 4292424 | Process for recovering vinyl polymers from emulsion polymerization latices The invention relates to the production of vinyl dispersion or paste resins by means of the emulsion polymerization process and the recovery of the resins from the polymer latices produced thereby. In the process, the polymer latex is first carefully coag... | 09/29/1981 |
| 4251362 | Method of, products and devices for processing polluting materials such in particular as hydrocarbons cast up by the sea, waste sludges The invention relates to a method of treating in particular polluting materials such as hydrocarbons. Said materials are processed with at least one basic product such as hydraulic, natural organic or synthetic binder and in particular the calcium sulphat... | 02/17/1981 |
| 4247340 | Purification of sugars using emulsion anion exchange resins Impure sugar solutions containing charged particulate impurities are treated with strongly basic emulsion anion exchange resin particles to form flocs of the charged particulate impurities and the resin particles. These flocs remove dissolved ionic impuri... | 01/27/1981 |
| 4246102 | Method for separating pollutants from liquid In the particular embodiment of the invention described in the specification, a liquid to be purified passes first through a screen, a sand trap, a first sedimentation basin, an aeration basin and a second sedimentation basin, and then through a final pur... | 01/20/1981 |
| 4229295 | Solidification of aqueous sludge A process for treating aqueous sludge comprising a slurry of clay minerals and silica in water includes rapidly dispersing throughout the sludge at least one additive compound selected from the group consisting of mineral acids, acid salts of alkaline ear... | 10/21/1980 |
| 4226711 | Oil spill recovery method and apparatus The recovery of oil in an oil spill on water is achieved by a medium which not only absorbs the oil but causes it to become heavy and loose its buoyancy in relation to water so it can be made to sink, together with apparatus for effecting the deposit of t... | 10/07/1980 |
| 4226714 | Thickener control system The present invention is directed to a method and apparatus for maintaining steady state conditions in a separator. Steady state is maintained by controlling mass flow rates of influent to, and underflow from the separator. Specifically, an influent speci... | 10/07/1980 |
| 4210557 | Non-high density lipoprotein precipitant A reagent, of the type comprising a precipitator capable of precipitating low density lipoproteins, very low density lipoproteins, and other non-high density lipoproteins, is improved by the addition thereto of a non-interfering suitable agent capable of ... | 07/01/1980 |
| 4201667 | Process for removing arsenic from aqueous mediums A process for removing arsenic from aqueous mediums by adding, in the presence of phosphorus, sufficient calcium hydroxide to adjust the aqueous medium to a pH of from about 7.0 to 11.5, whereby precipitates of both arsenic and phosphorus are formed and a... | 05/06/1980 |
| 4108771 | Elimination of odors from organic wastes A method and solution are provided for reducing air-polluting odors emanating from organic waste products produced by metabolic processes and from organic industrial wastes, including effluents, sewage sludges, and the like, the method comprising contacti... | 08/22/1978 |
| 4078129 | Process for separating polyvinyl alcohol from its solution This invention relates to a process for separating polyvinyl alcohol from a solution. To an aqueous solution of polyvinyl alcohol, a coagulating agent is added. The coagulating agent consists essentially of a salting agent and a salt of boric acid. The sa... | 03/07/1978 |
| 4071449 | Process for treatment of waste water exhausted from water-wash spray booth using water-soluble paint A process for treatment of waste water exhausted from a water-wash spray booth using a water-soluble paint which comprises adding an acidic agent and an alkaline agent, which can form a salt insoluble or hardly soluble in water as the result of the intera... | 01/31/1978 |
| 4009046 | Process for treating sugar-factory molasses Process for treating sugar-factory molasses comprising dilution of the molasses with cold water, precipitation of the saccharose in the diluted molasses by addition of quicklime, and then filtration of the so-treated molasses, wherein an electrolyte selec... | 02/22/1977 |
| 3948770 | Method for clarifying oily water mixtures Mixtures of finely dispersed oil droplets in sea water which are often present in oil tanker compartments may be effectively separated by a chemical flocculating agent comprising a dry powdered mixture of an anionic polyelectrolyte and a sodium or calcium... | 04/06/1976 |
| 3939100 | Combination alkali metal pyrophosphate-alkaline earth metal pyrophosphate detergent builder Alkali metal pyrophosphates and alkaline earth metal pyrophosphates are combined to provide a builder system for detergent compositions.... | 02/17/1976 |
