Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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 |
| 7247284 | Method and apparatus for regeneration of flue gas scrubber caustic solutions A process to regenerate wet flue gas scrubber purge liquid into NaOH caustic suitable for make-up caustic for the scrubber is disclosed. Further, sulfur is removed from waste effluent in the form of gypsum with the process described herein. Lime is added to the spen... | 07/24/2007 |
| 6746592 | Process for removing aluminum species from alkali metal halide brine solutions A method for the reduction of soluble aluminum species in an evaporated salt alkali metal halide brine containing up to 500 ppb aluminum species to provide a brine feedstock suitable for use in a chlor-alkali membrane cell process, said method comprising treating sa... | 06/08/2004 |
| 6566561 | Fluoro-alcohol phase modifiers and process for cesium solvent extraction The invention relates to a class of phenoxy fluoro-alcohols, their preparation, and their use as phase modifiers and solvating agents in a solvent composition for the extraction of cesium from alkaline solutions. These phenoxy fluoro-alcohols comply with ... | 05/20/2003 |
| 6309530 | Concentration of chlor-alkali membrane cell depleted brine This invention relates to methods, systems and installations for concentrating depleted brine produced by the electrolytic decomposition of concentrated brine in chlor-alkali membrane cells and to the efficient use of power, steam and brine. More particul... | 10/30/2001 |
| 6175051 | Deactivation of metal liquid coolants used in nuclear reactor systems Liquid metal coolants, such as alkali metal used in nuclear reactor systems can be safely deactivated to form a disposable solid waste material. The alkali metal is dissolved in an ammoniacal liquid, such as anhydrous liquid ammonia to form a reaction mix... | 01/16/2001 |
| 5270023 | Process for producing sodium carbonate, sodium bicarbonate and associated compounds A process for producing sodium carbonate from a variety of crude ores and brine containing sodium bicarbonate and sodium carbonate without the use of calcium carbonate. The process includes the steps of reacting the raw materials containing sodium bicarbo... | 12/14/1993 |
| 5126019 | Purification of chlor-alkali membrane cell brine This invention relates to methods and systems for purifying brine for electrolysis in chlor-alkali cells, especially membrane cells by reducing the sulfate ion concentration, while at the same time minimizing the concentration of other undesireable ions s... | 06/30/1992 |
| 4800042 | Radioactive waste water treatment A volume-reducing solidification treatment method for radioactive waste liquid containing boron primarily in the form of boric acid or borates is disclosed. After an alkali is added to the waste water to adjust pH thereof, and optionally after evaporation... | 01/24/1989 |
| 4430241 | Mixed nitrate salt heat transfer medium and process for providing the same A process for producing particles of a non-friable eutectic mixture of sodium nitrate and potassium nitrate for solar power station use is disclosed. In one embodiment of the invention, the particles are produced by shock chilling a molten stream of mixed... | 02/07/1984 |
| 4279791 | Recovery of cerium from polymer dispersions This invention relates to removal of cerium, used as a free-radical initiator, from aqueous polymeric dispersions, particularly starch graft copolymer dispersions, by adsorbing cerium (III) onto a strong cation exchange resin, to separation of the adsorbe... | 07/21/1981 |
| 4216189 | Sulfur dioxide removal process Sodium sulfate is purged from a sulfur dioxide removal system involving contact of a sulfur dioxide-containing gas with a solution containing sodium sulfite to absorb sulfur dioxide from the gas. The spent absorbing solution is regenerated by desorbing su... | 08/05/1980 |
| 4207299 | Sulphur dioxide removal process Sodium sulfate is purged from a sulfur dioxide removal system involving contact of a sulfur dioxide-containing gas with a solution containing sodium sulfite to absorb sulfur dioxide from the gas. The spent absorbing solution is regenerated by desorbing su... | 06/10/1980 |
| 4154643 | Recovery process and apparatus for alkali metal-containing spent liquor An alkali metal-containing spent liquor is treated to recover the alkali metal content for reuse without the need for recycling furnace ash and forming solid pellets therefrom. A mixture of aluminum hydrate and alkali metal-containing waste liquor is dire... | 05/15/1979 |
| 4117077 | Process for alunite treatment A process for alunite ore treatment which comprises roasting alunite in the presence of oxygen at a temperature of from 580° to 620° C. for 1 to 3 hours, decomposing the roasted alunite by exposure to reducing agents at a temperature of from 580° to 62... | 09/26/1978 |
| 4035228 | Recovery process and apparatus for alkali metal-containing waste liquor A process and apparatus for treating concentrated alkali metal-containing waste liquor to recover the alkali metal content for reuse includes the following steps and apparatus. Concentrated alkali metal-containing waste liquor is mixed with recycled alumi... | 07/12/1977 |
| 4006213 | Halogen tin electrodeposition bath sludge treatment A process for the extraction and recovery of hydrated stannic oxide and alkali metal ferrocyanide from the sludge formed in a halogen tin electrodeposition bath is described. The process comprises dissolving the ferrocyanide compounds and the tetravalent ... | 02/01/1977 |
| 3971844 | Method for removing sodium sulfate from aqueous solutions Metal, e.g. sodium sulfate, is separated from metal, e.g. sodium sulfite, in a solution, for instance a solution used in a system involving contact of sulfur dioxide-containing gases with the sodium sulfite solution as an absorbing solution to recover sul... | 07/27/1976 |
| 3961034 | Method of removing sodium thiosulfate from a hydrosulfite reaction mixture Filtrate from a formate-sodium hydrosulfite preparation contains valuable amounts of sodium formate and sodium bisulfite, which are raw materials for the synthesis of sodium hydrosulfite. The filtrate also contains sodium thiosulfate which is a known cata... | 06/01/1976 |
