| Patents for C05B 11 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes (304) |
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| 11/06/1996 | CN1134914A Solvent sedimentation method for purifying wet method phosphoric acid |
| 12/27/1995 | CN1113903A Phosphate-potash composite fertilizer and its producing method |
| 12/27/1995 | CN1113900A Producing method for nitrate phosphate fertilizer |
| 12/27/1995 | CN1113882A Preparing method for industrial ammonium phosphate and series compound fertilizer |
| 08/22/1995 | US5443808 Method of producing alkali metal phosphate |
| 07/05/1995 | CN1104607A Efficient and energy saving cooling process for producing inorganic salts |
| 06/14/1995 | CN1028859C 磷酸铵浓缩器 Ammonium concentrator |
| 06/07/1995 | CN1103380A Process for preparing potassium dihydrogen phosphate by intermediate-temp. metathesis oxidation precipitation |
| 04/25/1995 | US5409516 Process for the production of phospho-nitrogenous products and products thus obtained |
| 04/19/1995 | CN1101637A Method for removing waste acid and waste slag from the titanium dioxide production by sulfuric acid method |
| 01/18/1995 | CN1097408A Production and application of mineral fertilizer containing natural magnesium |
| 07/13/1994 | CN1089250A Method and apparatus for producing fodder-calcium hydrogen phosphate |
| 06/15/1994 | CN1025021C Production of industrial ammonium phosphate |
| 02/22/1994 | CA1327113C Process for the removal of heavy metals from acid, phosphate-containing, aqueous media |
| 02/16/1994 | CN1081928A Closed circulation process for continuously thickening dreg-flushing liquid in wet phosphoric acid filter |
| 01/04/1994 | US5275639 Recovery of phosphates from elemental phosphorus bearing wastes |
| 09/22/1993 | EP0560882A1 Method for obtaining phospho-nitrogenous products |
| 05/18/1993 | US5211735 Process for preparing phosphated or nitrophosphated fertilizers through solubilization of phosphate rock |
| 04/28/1993 | CN1071407A Integrated meutralizing and concentrating device for producing phospham |
| 03/23/1993 | CA1314725C Fertilizer manufacture |
| 01/20/1993 | CN1068097A Improvement of chemical processing property of phosphate rock by its composition adjustment |
| 12/29/1992 | US5174805 Organic neutral liquid fertilizer and process for preparing the same |
| 10/27/1992 | US5158594 Granulated nitrogen-phosphorus-potassium-sulfur fertilizer from waste gypsum slurry |
| 09/30/1992 | CN1064858A Wet process for combined production of fertilizer grade and pure ammoniwn phosphate with phosphric acid |
| 08/05/1992 | CN1063274A 磷酸铵浓缩器 Ammonium concentrator |
| 07/29/1992 | CN1063095A Process for preparation of products containing phosphorus-nitrogen and prodcts obtained |
| 06/06/1992 | WO1992010443A1 Method for obtaining phospho-nitrogenous products and products thus obtained |
| 05/06/1992 | CN2103555U Neutralization and consentration integrated device for producing ammonium phosphate |
| 03/24/1992 | US5098461 Phosphatic and nitrogen fertilizers via HNO3 processing |
| 10/17/1991 | WO1991015424A1 Method for producing alkali metal phosphate |
| 09/25/1991 | CN1014052B Preparation of potassium phosphate from phosphorus ore and potassic rock |
| 09/25/1991 | CN1014051B Producing potassium phosphate from ores containing potassium and phosphate |
| 09/05/1991 | WO1991013045A1 Organic polyacids derived from humic acids and their utilisation in agriculture |
| 03/27/1991 | CN1012166B Producing calcium superphosphat by activated ore pulp method |
| 12/04/1990 | US4975162 Removal of cadmium from phosphoric acid-containing solutions |
| 09/19/1990 | CN1045388A Process for preparing potassium phosphate and n-p-k fertilizers from potassium chloride at low temp. |
| 08/29/1990 | CN1009360B Method for producing urea-(nh4)3 po4 compound fertilizer |
| 05/23/1990 | CN1008080B Process for preparing dihydropotassium phosphate |
| 01/17/1990 | EP0350994A2 Removal of cadmium from phosphoric acid-containing solutions |
| 08/23/1989 | CN1034913A Method of producing ammonium magnesium phosphate fertilizer with medium |
| 08/02/1989 | EP0325887A1 Production of fertilizer NP and NPK with NP slurry process achieving increased percentage of water solubility |
| 07/25/1989 | US4851242 Aggregates of recent formation of organic sea limestones; phosphates formed on surface by action of phosphoric acid |
| 05/30/1989 | US4834787 Phosphate rock utilization |
| 04/18/1989 | US4822582 Process for the removal of heavy metals from acid, phosphate-containing, aqueous media |
| 12/27/1988 | US4793979 Process for chemical separation of phosphorus ore |
| 08/03/1988 | CN88100149A Producing calcium superphosphat by activated ore pulp method |
| 06/15/1988 | CN87106257A Hcl-f circulating method for producing potassium orthophosphate |
| 05/18/1988 | EP0144407B1 Nutrition product, particularly for animals and soils, method and plant for manufacturing such product |
| 01/20/1988 | EP0253454A1 Process for the removal of heavy metals from acid, phosphate-containing aqueous media |
| 06/10/1987 | CN85108924A Method for preparation of high concentration n-p-k compound base fertilizer |
| 02/11/1987 | CN86102151A Method of manufacturing npk compound fertilizer using precipitant |
| 01/31/1987 | CN86101186A Process for peparing dihydropotassium phosphate |
| 01/14/1987 | CN85104948A Production of solid ammonium phosphate from low and medium grade phosphorus ore |
| 01/10/1987 | CN85100950A Process for the production of mixed fertilizers |
| 11/18/1986 | CA1214020A1 Production of fluid fertilizer from phosphorus furnace waste stream |
| 09/24/1986 | CN85102403A Preparation of potassium phosphate from phosphorus ore and potassic rock |
| 09/17/1986 | CN85102377A Producing potassium dihydrogen phosphate from phosphate rock and potassium salt by stepwise method |
| 09/17/1986 | CN85102376A Method for producing urea-(nh4)3 po4 compound fertilizer |
| 09/17/1986 | CN85102311A Producing potassium phosphate from ores containing potassium and phosphate |
| 09/17/1986 | CN85101980A New technology for preparation of powdered ammonium phosphate |
| 07/02/1986 | CN85100476A High mg-containing granulous ammonium phosphate |
| 05/10/1986 | CN85107209A Method of chemical seperation of low grade calc-phosphorous ore |
| 02/04/1986 | US4568374 Process for the preparation of fertilizers by the partial solubilization of phosphate rocks |
| 12/10/1985 | US4557748 Method of lowering the magnesium impurity level of wet-process phosphoric acid during production of liquid fertilizer |
| 09/10/1985 | CN85100187A Process for chemcial separation of phosphate ore |
| 06/19/1985 | EP0144407A1 Nutrition product, particularly for animals and soils, method and plant for manufacturing such product. |
| 06/18/1985 | US4523941 Process for the partial solubilization of phosphate rock and obtaining phosphate fertilizers therefrom |
| 03/26/1985 | US4507139 Acid type solid urea-nitric fertilizer |
| 12/20/1984 | WO1984004871A1 Nutrition product, particularly for animals and soils, method and plant for manufacturing such product, and food composition obtained thereby |
| 09/04/1984 | US4469504 Rapid, low temperature |
| 12/13/1983 | US4420321 Process for removal of carbon black floc associated with wet-process phosphoric acid in the production of fertilizers |
| 11/15/1983 | US4415472 Synergistic antifoam agents; treating phosphate rock |
| 04/20/1982 | CA1121980A1 Treatment of effluent gases from the manufacture of fertilizer |
| 04/06/1982 | US4323386 Method of manufacturing NP- or NPK-containing fertilizers from magnesium containing phosphate |
| 03/23/1982 | US4321077 Method of preparation of multicomponent fertilizers |
| 01/05/1982 | CA1115483A1 Preparation of monocalcium phosphate and phosphoric acid |
| 12/16/1981 | EP0041626A1 Defoamer mixture of alkali salts of the dialkyl esters of sulfosuccinic acid and long-chained aliphatic alcohols and use of this mixture for skimming acid decomposition materials |
| 11/04/1981 | EP0039241A2 Method and apparatus for producing nitrophosphate fertilizers |
| 08/11/1981 | US4283423 Free-flowing granular urea nutrient supplements |
| 07/28/1981 | CA1105672A1 Process for preparing phosphate products |
| 02/24/1981 | US4252553 Dissolving phosphate rock by treating with sulfurous acid followed by ammoniation |
| 11/04/1980 | US4231780 Forming gypsum and phosphate fertilizers |
| 11/04/1980 | CA1088724A1 Fluoride-free phosphate reactions |
| 10/15/1980 | EP0017293A1 Process for preparing complex suspension fertilizers and product obtained |
| 10/01/1980 | EP0016591A1 Treatment of effluent gases from the manufacture of fertilizer and products obtained thereby |
| 08/26/1980 | CA1084240A1 Process for the simultaneous manufacture of phosphoric acid or the salts thereof and a complex multi-component mineral fertilizer |
| 03/04/1980 | US4191734 Fluoride-free phosphate reactions |
| 12/04/1979 | US4177053 Method for the production of phosphoric acid with high contents of fertilizer-nutrients |
| 11/27/1979 | US4175944 Removal of fluorine during production of fertilizer |
| 09/18/1979 | US4168150 From phosphate rack |
| 07/10/1979 | US4160657 Preparation of monocalcium phosphate and phosphoric acid |
| 05/15/1979 | US4154800 Sulfur trioxide, sulfuric acid, sulfur dioxide |
| 01/02/1979 | US4132540 Process for removing solvent from the raffinate of extracted phosphoric acid and for preparing phosphate salts |
| 08/08/1978 | US4105748 Continuous |
| 02/14/1978 | US4073635 Process for producing a slurry suitable for the manufacture of a mixed fertilizer containing nitrogen plus phosphorus |
| 02/14/1978 | US4073634 Process for production of fertilizers |
| 10/25/1977 | US4055626 Sulfuric acid, potassium ion, silicon dioxide |
| 08/02/1977 | US4039624 Method of producing phosphoric acid from high iron and aluminum content phosphate rocks using nitric acid |
| 02/15/1977 | US4008315 Process for reducing nitrogen oxide losses from certain slurries and solutions by the addition of phosphate salts |
| 02/15/1977 | US4008309 Process for crystallizing calcium nitrate |