| Patent Number |
Title Of Patent |
Date Issued |
| 7431902 |
Separation of ammonia from sulfur compounds |
Oct. 7, 2008 |
| 7416715 |
Method and apparatus for the production of gaseous ammonia from a urea solution |
Aug. 26, 2008 |
| 7270796 |
Ammonium/ammonia removal from a stream |
Sep. 18, 2007 |
| 7229601 |
Ammonia reclamation system |
Jun. 12, 2007 |
| 7052660 |
Wet-processing method for combustion ashes of petroleum fuels |
May. 30, 2006 |
| 7033562 |
Ammonia recovery in the preparation of silazanes and polysilazanes |
Apr. 25, 2006 |
| 6861041 |
Method for treating and upgrading effluents containing metallic sulphates using an ammonia addition step |
Mar. 1, 2005 |
| 6752975 |
Combustion exhaust gas treatment process and treatment apparatus |
Jun. 22, 2004 |
| 6746654 |
Dry and semi-dry methods for removal of ammonia from fly ash |
Jun. 8, 2004 |
| 6558643 |
Method for ammonia removal from waste streams |
May. 6, 2003 |
| 6485700 |
Process for producing free hydroxylamine aqueous solution |
Nov. 26, 2002 |
| 6333012 |
Process for producing ammonium metavanadate |
Dec. 25, 2001 |
| 6077494 |
Method for removing ammonia from ammonia contaminated fly ash |
Jun. 20, 2000 |
| 6060030 |
Detached plume abatement method |
May. 9, 2000 |
| 6033637 |
Method for treating combustion ashes |
Mar. 7, 2000 |
| 5763652 |
Process for producing a carboxylic acid |
Jun. 9, 1998 |
| 5387407 |
Process for the recovery of ammonia from flue gases |
Feb. 7, 1995 |
| 5281318 |
Process for processing a waste etching solution containing a fluorine component and an ammonia component to recover valuables therefrom |
Jan. 25, 1994 |
| 4988491 |
Flexible integration of the production of ammonia and urea |
Jan. 29, 1991 |
| 4965061 |
Process for removing fluoride from a wastewater and producing hydrofluoric acid therefrom |
Oct. 23, 1990 |
| 4882134 |
Recovery of hydrogen fluoride from an aqueous solution containing ammonium fluoride and hydrogen fluoride |
Nov. 21, 1989 |
| 4861490 |
Removal of cationic impurities from inorganic solutions |
Aug. 29, 1989 |
| 4832930 |
Decomposition of ammonium thiocyanate |
May. 23, 1989 |
| 4801356 |
Removal of ammonia from fuel cell power plant water system |
Jan. 31, 1989 |
| 4720375 |
Process for producing magnesium oxide |
Jan. 19, 1988 |
| 4713231 |
Process for the recovery of ammonia and fluoride values from ammonium fluoride solutions |
Dec. 15, 1987 |
| 4710215 |
Process for distillation-crystallization of zinc carbonate |
Dec. 1, 1987 |
| 4460555 |
Ammonia scavenger |
Jul. 17, 1984 |
| 4432958 |
Method for the selective removal and recovery of ammonia from ammonia- and hydrogen sulfide-containing gas mixtures |
Feb. 21, 1984 |
| 4396463 |
Method of purifying waste water |
Aug. 2, 1983 |
| 4394363 |
Process for the granulation of precipitation products formed from ammonium compounds |
Jul. 19, 1983 |
| 4342735 |
Stripping of aqueous ammonium carbonate solution |
Aug. 3, 1982 |
| 4336102 |
Method for recovery and reuse of ammonia in ammonia-base sulfite cooking liquors |
Jun. 22, 1982 |
| 4311597 |
Method and apparatus for treatment of wastewater |
Jan. 19, 1982 |
| 4308247 |
Recovering nitrogen bases from a hydrosulfide/sulfur dioxide removal process |
Dec. 29, 1981 |
| 4305917 |
Method for preparing ammonia and hydrogen chloride from ammonium chloride |
Dec. 15, 1981 |
| 4302430 |
Process for releasing ammonia bound in coal water |
Nov. 24, 1981 |
| 4293532 |
Process for producing hydrogen chloride and ammonia |
Oct. 6, 1981 |
| 4271013 |
Method and apparatus for removing biodegradable compounds from wastewater |
Jun. 2, 1981 |
| 4263145 |
Recovery of ammonia or amine from a cation exchange resin |
Apr. 21, 1981 |
| 4220634 |
Process for converting ammonium imidodisulfate, ammonium sulfamate and ammonium dithionate to sulfur dioxide and ammonia |
Sep. 2, 1980 |
| 4208390 |
Process for the recovery of ammonia and sulphur dioxide from a contaminated ammonium salt of sulphuric acid |
Jun. 17, 1980 |
| 4201759 |
Method for regenerating calcium sulfoxy compounds produced in the combustion of carbonaceous fuels in fluidized beds |
May. 6, 1980 |
| 4201754 |
Method for the conversion of calcium sulfoxy compounds into calcium carbonate compounds in sulfur oxide treatment processes |
May. 6, 1980 |
| 4187280 |
Process for recovering useable products from by-product ammonium nitrate formed in the manufacture of nuclear reactor fuels or breeder materials |
Feb. 5, 1980 |
| 4180550 |
Process for purifying a sulfur dioxide containing gas by washing with an ammonia aqueous solution |
Dec. 25, 1979 |
| 4172017 |
Process for producing chlorine from ammonium chloride |
Oct. 23, 1979 |
| 4165264 |
Ammonia leaching |
Aug. 21, 1979 |
| 4163043 |
Process for removing H.sub.2 S and CO.sub.2 from gases and regenerating the adsorbing solution |
Jul. 31, 1979 |
| 4160725 |
Waste water purification processes |
Jul. 10, 1979 |
