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| Number | Title | Issue Date |
| 7691171 | Process for the manufacture of bio-release iron-manganese fertilizer This invention provides a process for the preparation of water insoluble, bio-release iron-manganese fertilizer which comprises, heating phosphoric acid with a mixture of (i) source of iron oxide such as goethite and hematite, (ii) pyrolusite and (iii) one or more b... | 04/06/2010 |
| 7670405 | Process for the manufacture of a bio-release fertilizer of an anionic micro nutrient viz molybdenum This invention describes a process for the preparation of bio-release molybdenum fertilizers which comprises heating molybdenum trioxide, one or more basic compound(s) of metal(s) selected from magnesium, calcium and sodium, and phosphoric acid till a solid polyphos... | 03/02/2010 |
| 7175684 | Prilling method A prilling method comprising the steps of: providing a molten first component, mixing at least a second component with the molten first component, reacting the components to form a shear-thinnable mixture; and prilling the shear-thinnable mixture wherein the prillin... | 02/13/2007 |
| 7160349 | Formulation of phosphorus fertilizer for plants Concentrated phosphorus fertilizers are disclosed that comprise a buffered composition of an organic acid and salts thereof and a phosphorous-containing acid and salts thereof. The concentrated phosphorus fertilizers can be diluted with water of pH ranging from abou... | 01/09/2007 |
| 7160350 | Formulation of phosphorus fertilizer for plants Concentrated phosphorus fertilizers are disclosed that comprise a buffered composition of an organic acid and salts thereof and a phosphorous-containing acid and salts thereof. The concentrated phosphorus fertilizers can be diluted with water of pH ranging from abou... | 01/09/2007 |
| 7101522 | Production of dicalcium phosphate or monocalcium phosphate A process is provided for the production of dicalcium phosphate form a phosphate source material in which a solution of phosphoric acid is produced by the action of a suitable mineral acid, generally sulphuric acid, on a phosphate source material. Calcium fluoride i... | 09/05/2006 |
| 6930139 | Anti-explosive fertilizer coatings Coatings for agricultural grade fertilizer particles and industrial grade ammonium nitrate are provided which when applied to particles form a protective film which acts as a barrier to inhibit or prevent hydrocarbon infiltration of the fertilizer particle pores and... | 08/16/2005 |
| 6929673 | Formulation of phosphorus fertilizer for plants Concentrated phosphorus fertilizers are disclosed that comprise a buffered composition of an organic acid and salts thereof and a phosphorous-containing acid and salts thereof. The concentrated phosphorus fertilizers can be diluted with water of pH ranging from abou... | 08/16/2005 |
| 6896714 | Formulation of phosphorus fertilizer for plants Concentrated phosphorus fertilizers are disclosed that comprise a buffered composition of an organic acid and salts thereof and a phosphorous-containing acid and salts thereof. The concentrated phosphorus fertilizers can be diluted with water of pH ranging from abou... | 05/24/2005 |
| 6645268 | Formulation of phosphorus fertilizer for plants Concentrated phosphorus fertilizers are disclosed that comprise a buffered composition of an organic acid and salts thereof and a phosphorous-containing acid and salts thereof. The concentrated phosphorus fertilizers can be diluted with water of pH rangin... | 11/11/2003 |
| 6406510 | Methods for treating wastewater sludge This invention relates to methods for treating wastewater sludge cake with acid and calcium carbonate under acidic, low heat conditions to produce a stable, soil-like or granular, finished product containing calcium carbonate, useful as a nitrogen fertili... | 06/18/2002 |
| 6391080 | Phosphate, phosphatic fertilizers manufacturing process The new process is a process designed to produce P205 (the basic component in phosphoric acid, phosphate chemicals and fertilizers) in the gas phase in lieu of the state of the art (liquid phase) wet process. The new process is much less polluting than th... | 05/21/2002 |
| 6231767 | Treatment of phosphatic wastes A process for treating thickened phosphatic clay suspensions, waste clay and phosphogypsum produced in the processing of phosphate ore by water beneficiation and chemical processing, the thickened phosphatic clay suspension having a solid content of from ... | 05/15/2001 |
| 6183532 | Method for sterilizing soils The present invention relates to a method for sterilizing soils and of the equipment related thereto. The method includes sequentially at least the following phases: dispersion into the soil of at least one compound, solid, liquid or gaseous, able to reac... | 02/06/2001 |
| 6113665 | Formulation of phosphorus fertilizer for plants Concentrated phosphorous fertilizers are disclosed that comprise a buffered composition of a phosphorous-containing acid or salt thereof. The concentrated phosphorus fertilizers can be diluted with water of pH ranging from about 6.5 to about 8.5 at ratios... | 09/05/2000 |
| 5830255 | Formulation of phosphorus fertilizer for plants Concentrated phosphorus fertilizers are disclosed that comprise a buffered composition of an organic acid and salts thereof and a phosphorous-containing acid and salts thereof. The concentrated phosphorus fertilizers can be diluted with water of pH rangin... | 11/03/1998 |
| 5514200 | Formulation of phosphorus fertilizer for plants Concentrated phosphorus fertilizers are disclosed that comprise a buffered composition of an organic acid and salts thereof and a phosphorous-containing acid and salts thereof. The concentrated phosphorus fertilizers can be diluted with water of pH rangin... | 05/07/1996 |
| 5378258 | Method and an installation for producing granulated triple superphosphate (TSP) A method and an installation for producing granulated triple superphosphate wherein a premixer for phosphate and a phosphoric acid solution includes unclogging means comprising in combination a flexible axial sleeve of non-vulcanized elastomer for injecti... | 01/03/1995 |
| 5374294 | Controlled release potassium divalent metal phosphate fertilizer A controlled slow release potassium divalent metal phosphate composition for agriculture and an effective method of preparing the composition. The cold water insolubilities of each of the contained nutrients are between 35 and 98 percent. The potassium ex... | 12/20/1994 |
| 5308372 | Vegetable oil processing to obtain nutrient by-products A method of processing vegetable oil in which non-toxic reagents are used, so that a waste stream is evolved suitable for use as a nutrient source and wherein the non-toxic reagents include nutrient components whereby the nutrient value of the waste strea... | 05/03/1994 |
| 5300136 | Potassium fertilizer from aluminum reclamation by-products Scrap aluminum is reclaimed by a salt flux-based reclamation process using potassium chloride in place of the commonly used sodium chloride. The spent flux which remains after the recovery of the aluminum is useful as a soil fertilizer, with the potassium... | 04/05/1994 |
| 5211735 | Process for preparing phosphated or nitrophosphated fertilizers through solubilization of phosphate rock The invention aims at a process for preparing phosphated or nitrophosphated fertilizers through reaction of phosphate rock in aqueous pulp, with sulfuric and/or phosphoric acids, with addition, or not, of ammonia, so as to produce fertilizers of the types... | 05/18/1993 |
| 5035872 | Method of preparing potassium magnesium phosphate A method of preparing potassium magnesium phosphate hexahydrate by reacting calcium dihydrogen phosphate with potassium sulfate and a basic magnesium compound is described.... | 07/30/1991 |
| 4932993 | Batch production of suspension fertilizers using lignosulfonate In the production of suspension fertilizers the addition of an additive comprising lignosulfonate to the wet-process acid prior to the ammoniation step prevents severe thickening of the suspension during its formation, which severe thickening is normally ... | 06/12/1990 |
| 4883530 | Use of ammonium syngenite as a slow-acting nitrogen fertilizer Soils are fertilized by a method in which ammonium syngenite (NH4)2 SO4.CaSO.sub.4.H.sub.2 O or a mixture of finely divided ammonium sulfate, calcium sulfate, calcium nitrate, calcium chloride and/or dicalcium phosphate is... | 11/28/1989 |
| 4838922 | Method for producing monocalcium phosphate and products produced therefrom Methods of producing monocalcium phosphate and products created therefrom are provided. The method includes the steps of mixing phosphoric acid and water with brown mud. Preferably, the phosphoric acid is added to water so that it comprises approximately ... | 06/13/1989 |
| 4836843 | Fertilizer process A method of fertilizing soil comprising the steps of treating soapstock with an acid containing phosphorus compounds, separating the acid oil from the acid water, and using the resulting acid water as fertilizer, or fertilizer component. Such use is parti... | 06/06/1989 |
| 4832735 | High nutrient value liquid fertilizer A liquid fertilizer containing about 6% to 9% nitrogen (N), 24% to 30% phosphoruspentoxide (P2 O5), and 5% to 9% potassium oxide (K2 O). The fertilizer is produced by the reaction of ammonium phosphate solution with phosph... | 05/23/1989 |
| 4765822 | Recovery of fluorine from waste gases Fluorine in phosphate ores is present as the mineral fluorapatite. When the ores are digested with sulfuric acid a slurry is formed which can be filtered to make wet-process phosphoric acid. But fluorine compounds are discharged into the surrounding air d... | 08/23/1988 |
| 4576627 | Method of providing fertilizer from brines A process is provided for the recovery of one or more useful products including fertilizer, salt, and/or purified process water from brines. The source of the brines can be oil field wastes, seawater, or other inland brine sources. Phosphoric acid is init... | 03/18/1986 |
| 4557748 | Method of lowering the magnesium impurity level of wet-process phosphoric acid during production of liquid fertilizer A process for treating wet-process weak phosphoric acid solution is disclosed which significantly lowers the magnesium impurities in the acid (as well as certain other impurities) permitting subsequent concentration of the acid to levels for use in prepar... | 12/10/1985 |
| 4536376 | Method of producing potassium magnesium phosphate Process for producing potassium magnesium phosphate by reacting basic magnesium compounds with phosphoric acid or phosphates in the presence of potassium sulfate from a mother liquor containing per 1000 g water up to 150 g magnesium sulfate and up to 120 ... | 08/20/1985 |
| 4528021 | Granulated fertilizer and slurry process therefor A continuous process for the production of a granulated fertilizer wherein comminuted phosphate rock, phosphoric acid and water are introduced into a pre-reactor where they are heated. The mixture is continuously withdrawn and transferred to a digester wh... | 07/09/1985 |
| 4522638 | Method and apparatus for regulating the NH3 content in scrubbing liquid used in a gas scrubbing process A process for regulating the NH3 content in an organic liquid that acts as a physical scrubbing agent and is used in a procedure for absorbing sour gases from gaseous mixtures. To ensure undisturbed and reliable carrying out of the scrubbing pr... | 06/11/1985 |
| 4496526 | Process for the production of potassium magnesium phosphate For the production of potassium magnesium phosphate from phosphoric acid, potassium salts and basic magnesium compounds, these are reacted in a mixture of recycled mother liquor from the potassium magnesium phosphate crystallization and of fresh water, wi... | 01/29/1985 |
| 4475940 | Method of converting waste dross to fertilizer A substantially dry, granulated, relatively dust free, and commercially valuable fertilizer product is obtained by treating the waste dross product from resmelting and purification of scrap aluminum with phosphoric acid.... | 10/09/1984 |
| 4457773 | Magnesium phosphate fluid fertilizer A 0-21-0-9 Mg liquid mixed fertilizer is prepared by adding powdered magnesium hydroxide and an equal amount of water to a dilute solution of phosphoric acid in a plurality of addition steps. A dispersing powder and an emulsifying agent are then added to ... | 07/03/1984 |
| 4440560 | Mixed phosphatic fertilizer and process for producing the same In producing a mixed phosphatic fertilizer, humic acid is mixed with fused phosphate to cause the humic acid to react on alkaline ingredients of the fused phosphate for turning these alkaline ingredients into chelate compounds, so that water-soluble phosp... | 04/03/1984 |
| 4337079 | Low polyphosphate suspension fertilizers from wet-process acid An energy efficient process and apparatus is described that allows production of concentrated polyphosphate containing ammonium phosphate suspension fertilizers that can be stored and handled at temperatures well below 0° F. Ammoniation of the merchant-g... | 06/29/1982 |
| 4336053 | Fertilizer solutions stabilized with inorganic acids A stable liquid fertilizer solution containing nitrogen, phosphorus, iron and optionally sulfur is prepared by mixing a water-soluble iron compound with ammonium polyphosphate and water to produce an iron phosphate slurry having a molar ratio of polyphosp... | 06/22/1982 |
