Famous Patents
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.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7390470 | Process for treating a gas stream Processes for selectively removing sulfur-containing compounds from a gas are described herein. The processes generally include contacting a first gas including carbon dioxide and hydrogen sulfide with a scrub solution including ammonium bisulfite and ammonium sulfi... | 06/24/2008 |
| 6605263 | Sulfur dioxide removal using ammonia A process and apparatus for removing SO2 from a gas stream having the steps of scrubbing the SO2 with an ammonia scrubbing solution and removing any aerosols generated by the scrubbing in a wet electrostatic precipitator. The scrubbi... | 08/12/2003 |
| 6066304 | Process for removing sulfur dioxide out of a gas A process is provided for scrubbing sulfur dioxide out of a flue gas by contacting the flue gas with a scrubbing liquid containing diammonium phosphate and ammonium sulfite and in which the total concentration of phosphates is maintained in a balance with... | 05/23/2000 |
| 6063352 | Method of removing sulfur dioxide from flue gases, especially power plant flue gases and flue gases from garbage incinerator plants SO2 containing flue gas is scrubbed with a scrubbing solution made up from ammonia water, untreated ammonium sulfate scrubbing solution recycled from the bottom of the scrubbing zone and ammonium sulfate solution formed by oxidizing a portion o... | 05/16/2000 |
| 5510094 | Ammonia-limestone scrubbing with by-product for use in agriculture A method of wet flue gas desulfurization of combustion gases that incorporates both calcium scrubbing with forced oxidation and ammonia scrubbing of the gas in a scrubber tower. The end product or result from such a process is gypsum and ammonia sulfate w... | 04/23/1996 |
| 5362458 | Process for the simultaneous absorption of sulfur oxides and production of ammonium sulfate Process for the removal of sulfur oxides from sulfur oxide-containing gas with simultaneous production of ammonium sulfate. The process is carried out by first passing hot sulfur oxide-containing gas through a prescrubber wherein the gas contacts saturate... | 11/08/1994 |
| 4255400 | Process for oxidizing oxides of sulfur This invention relates to a process for catalytic oxidation of oxides of sulfur and also relates to oxidation of oxides of sulfur oxides and oxides of nitrogen.... | 03/10/1981 |
| 4250160 | Production of ammonium sulfate A process for the production of ammonium sulfate in a multistage contactor (or column) inclusive of liquid cyclone recycle. A gas, or gases, which contains sulfur dioxide, e.g., a flue gas, is contacted with ammonia in an oxygen and water environment in a... | 02/10/1981 |
| 4248842 | Removal of contaminants and recovery of by-products from hot waste gas stream A process for the removal of sulfur dioxide and other contaminants and the recovery of ammonium sulfate as a by-product from a hot waste gas stream comprising cooling the waste gas stream to a temperature below 120° F., passing said waste gas stream in s... | 02/03/1981 |
| 4070183 | Methods of separating and recovering copper from materials containing copper Cuprous sulphate solutions, suitable for thermal or electrochemical disproportionation to yield copper, are obtained by dissolving copper sulphites, such as Chevreul's salt or cuprous ammonium sulphite, in acetonitrile-water or 2 hydroxycyanoethane-water ... | 01/24/1978 |
