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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7922876 | Method for processing an etching mixture which is formed during the production of highly pure silicon In a method for recovering acid from an aqueous etching mixture containing HF, HNO3, H2SiF6 and HNO2 which has been used for purifying polycrystalline silicon, the used etching mixture is distilled progressively so that ap... | 04/12/2011 |
| 7232504 | Apparatus and method for distilling waste liquids A distilling apparatus and method use a two step distillation and purification process for processing a waste liquid, such as an impure sulfuric acid solution, to form a highly concentrated sulfuric acid solution. First, the waste liquid is stored in a concentrating... | 06/19/2007 |
| 6969446 | Method for producing concentrated nitric acid and installation for carrying out a method of this type Process for producing a nitric acid of a concentration from 75 to 99.9% from a more diluted nitric acid, wherein a nitric acid of a concentration of about 45 to 70% is rectified in contact with a liquid extraction medium to prevent the formation of a nitric acid-wat... | 11/29/2005 |
| 6737034 | Nitric acid production A method process to convert inhibited red fuming nitric acid (IRFNA) and/or nitrogen tetraoxide to either dilute or concentrated (98%+) nitric acid. The method describes a process to remove all of the normal inhibitors (if required), that have been reported to been ... | 05/18/2004 |
| 6290820 | Apparatus and method for concentrating a dilute solution A method that employs a dilute solution, such as a dilute hydrogen peroxide solution, and concentrates the dilute solution to a yield a concentrated solution. A concentrated solution prepared by the method of the invention is useful as a rocket fuel, a la... | 09/18/2001 |
| 6015477 | Point-of-use ammonia purification for electronic component manufacture Highly purified ammonia for use in processes for the production of high-precision electronic components is prepared on-site by drawing ammonia vapor from a liquid ammonia reservoir, passing the vapor through a filter capable of filtering out particles of ... | 01/18/2000 |
| 5846386 | On-site ammonia purification for semiconductor manufacture Highly purified ammonia for use in semiconductor manufacturing is prepared on-site by drawing ammonia vapor from a liquid ammonia reservoir, passing the vapor through a filter capable of filtering out particles of less than 0.005 micron in size, and scrub... | 12/08/1998 |
| 5755934 | Point-of-use ammonia purification for electronic component manufacture Highly purified ammonia for use in processes for the production of high-precision electronic components is prepared on-site by drawing ammonia vapor from a liquid ammonia reservoir, passing the vapor through a filter capable of filtering out particles of ... | 05/26/1998 |
| 5714634 | Process for storage and transport of toluenediamine This invention relates to an improved process for storing and transporting toluenediamine, particularly for long term storage or storage in large containers, e.g., shipboard containers. The improvement in the process resides in substantially reducing the ... | 02/03/1998 |
| 5632866 | Point-of-use recycling of wafer cleaning substances A method of recycling and purifying cleaning chemicals used in the production of semiconductor circuits and containing hydrofluoric acid and or hydrochloric acid. Recycling of such chemicals is accomplished using separation and reconstitution steps Hydrof... | 05/27/1997 |
| 5603811 | Process for the treatment of an aqueous solution mainly containing nitric acid and hydrofluoric acid A process for treating an aqueous solution mainly containing nitric acid and hydrofluoric acid. The process involves distilling to provide an aqueous solution concentrated in nitric acid and hydrofluoric acid for the separation thereof, then separating by... | 02/18/1997 |
| 5502188 | Production of almost colorless solutions of n-methylmorpholine oxide Aqueous solutions of N-methylmorpholine N-oxide having color numbers below 200 APHA, based on an N-methylmorpholine N-oxide content of 50% by weight, are produced by reacting aqueous hydrogen peroxide solutions with aqueous solutions of N-methylmorpholine... | 03/26/1996 |
| 5500098 | Process for regeneration of volatile acids Volatile acids containing metal salt impurities, such as metal pickling solutions-are regenerated by a process in which the acid is subjected to sulfuric acid distillation. Resulting volatile acid vapor is condensed and recycled to the pickle tank, while ... | 03/19/1996 |
| 4966276 | Processes for concentrating nitric acid An integrated continuous processes for concentrating "weak" nitric acid and concurrently reconcentrating the spent dehydrating agent used to break the nitric acid azeotrope to obtain "strong" nitric acid, the processes involving direct coupling of the nit... | 10/30/1990 |
| 4526658 | Method for improving ruthenium decontamination efficiency in nitric acid evaporation treatment A method for improving ruthenium decontamination efficiency in a nitric acid recovery system in which a nitric acid solution containing ruthenium is subjected to an evaporation treatment in a nitric acid evaporator. The method is characterized by carrying... | 07/02/1985 |
| 4384924 | Method of separating acids and bases which have been carried along in the vapors formed during distillation A method of separating acids or bases from vapors which are conveyed along with distillation vapors during concentration of a solution, comprising, passing said distillation vapors containing an acid or base, while being maintained at their existing press... | 05/24/1983 |
| 4344827 | Process for working up nitric acid Process for working up aqueous nitric acid which is of a concentration above the azeotropic concentration and contains organic compounds in solution for suspension wherein said nitric acid of a concentration about the azeotropic concentration is distilled... | 08/17/1982 |
