Acids Of Phosphorus Patents (Class 71/41)
-
Patent number: 8999031Abstract: A composite particle and a population of particles comprising a water-insoluble polyphosphate composition, methods of producing, and methods of using the same are provided. The polyphosphate composition may comprise at least one alkaline earth metal selected from calcium and magnesium and optionally at least one nutrient ion selected from the group consisting of potassium, ammonium, zinc, iron, manganese, copper, boron, chlorine, iodine, molybdenum, selenium or sulfur.Type: GrantFiled: August 8, 2011Date of Patent: April 7, 2015Assignee: Agtec Innovations, Inc.Inventor: Chandrika Varadachari
-
Patent number: 8585796Abstract: A fertilizer composition comprising a phosphite ingredient that that is individually effective against both fungal and bacterial plant pathogens is disclosed. The fertilizer composition is useful as a fertilizer, fungicide, and bactericide when applied to plants. A method of making the fertilizer composition is also disclosed.Type: GrantFiled: July 9, 2012Date of Patent: November 19, 2013Inventor: Carl Fabry
-
Patent number: 8557013Abstract: The invention is directed to processes for treating biosolids that result in high-value, nitrogen-containing, slow-release, organically-augmented inorganic fertilizer that are competitive with less valuable or more costly conventional commercially manufactured fertilizers. The process involves conditioning traditional waste-water biosolids and processing the conditioned biosolids continuously in a high throughput manufacturing facility. The exothermic design and closed loop control of the primary reaction vessel decreases significantly the amount of power necessary to run a manufacturing facility. The process utilizes green technologies to facilitate decreased waste and enhanced air quality standards over traditional processing plants. The fertilizer produced from recovered biosolid waste is safe and meets or exceeds the United States Environment Protection Agency (USEPA) Class A and Exceptional Quality standards and is not subject to restrictions or regulations.Type: GrantFiled: December 30, 2010Date of Patent: October 15, 2013Assignee: VitAG Holdings, LLCInventors: Jeffrey C. Burnham, James P. Carr, Gary L. Dahms
-
Patent number: 8461079Abstract: A composition which provides bactericidal, fungicidal and insecticidal activity when treating plants with effective amounts. The composition comprises the blending of: (1) an aqueous salicylate solution from salicylic acid reacted in an aqueous media with ammonium hydroxide and potassium hydroxide; (2) a reaction mixture that provides fungicidal activity and fertilizes plants when applied in an effective amount and which comprises potassium phosphates, potassium polyphosphate, potassium phosphites, and potassium polyphosphite and potassium phosphate phosphite copolymers; and, optionally, (3) aqueous potassium acetate.Type: GrantFiled: June 29, 2012Date of Patent: June 11, 2013Assignee: Plant Food Systems, Inc.Inventor: Carl J. Fabry
-
Patent number: 8221516Abstract: A bactericidal and fungicidal composition having fertilizer properties, the composition containing a percentage of potassium polyposphite is disclosed. The composition is useful as a fungicide, bactericide, and as a fertilizer for application to plants and, particularly, commercial crops. A method of making the polyposphite composition is described, as well as methods of using same.Type: GrantFiled: December 1, 2011Date of Patent: July 17, 2012Inventor: Carl Fabry
-
Patent number: 8216972Abstract: A process for the manufacture of an aqueous composition that is a combination of a fungicide and fertilizer comprising the following steps: (1) dissolving phosphorous acid in phosphoric acid to form a solution of an acid mixture; (2) reacting the acid mixture of step (1) with an aqueous hydroxide solution creating an exothermic reaction under pressure; and, (3) cooling the reaction product to between about 35° C. to about 65° C. The reaction product prepared according to the above process can also be used as a bactericide.Type: GrantFiled: April 27, 2011Date of Patent: July 10, 2012Assignee: Plant Food Systems, Inc.Inventors: Carl J. Fabry, Vaughn Astley
-
Patent number: 8193119Abstract: A process for the manufacture of an aqueous composition that is a combination of a fungicide and fertilizer comprising the following steps: (1) dissolving phosphorous acid in phosphoric acid to form a solution of an acid mixture; (2) reacting the acid mixture of step (1) with an aqueous potassium hydroxide solution at a temperature of about 65° C. to about 260° C. in a continuous reactor while maintaining the ratio of potassium to phosphorous in various mole ratios thereby forming a reaction mixture comprising potassium phosphates, potassium polyphosphates, potassium phosphites, and potassium polyphosphites and potassium phosphate phosphite copolymers; and, (3) cooling the reaction mixture rapidly at least 1° C. to 60° C., to below about 35° C. to about 65° C. Using a similar process a composition having fungicidal properties is prepared by reaction phosphoric acid with potassium hydroxide. The reaction mixtures prepared according to each of the above processes are also part of this invention.Type: GrantFiled: February 25, 2011Date of Patent: June 5, 2012Assignee: Plant Food Systems, Inc.Inventors: Carl J. Fabry, Vaughn Astley
-
Patent number: 8088191Abstract: A bactericidal and fungicidal composition having fertilizer properties, the composition containing a high percentage of potassium polyphosphite is disclosed. The composition is useful as a fungicide, bactericide, and as a fertilizer for application to plants and, particularly, commercial crops. A method of making the polyphosphite composition is described, as well as methods of using same.Type: GrantFiled: February 2, 2011Date of Patent: January 3, 2012Inventor: Carl Fabry
-
Patent number: 7947104Abstract: The invention describes a new method for treating sludge, which can result in the production of high nitrogen organically-augmented inorganic fertilizer that incorporates municipal sludges or biosolids or organic sludges that can compete with traditional fertilizers such as ammonium phosphate, ammonium sulfate and urea on the commodity fertilizer marketplace. The method takes advantage of the thixotropic property of dewatered biosolids or organic sludge to create a pumpable paste-like material from the biosolids or organic sludge that is then treated with an oxidizer to reduce odorant effects and an acid. This mix is then interacted with concentrated sulfuric and or phosphoric acids and an ammonia source or alternatively a hot or molten melt or salt of ammonium sulfate/phosphate to form a fertilizer mix. The present invention controls the heat, atmospheric pressure and retention time of the fertilizer mix in the reaction vessel.Type: GrantFiled: February 19, 2008Date of Patent: May 24, 2011Assignee: Vitag Corp.Inventors: Jeffrey C. Burnham, James P. Carr, Gary L. Dahms
-
Patent number: 7887616Abstract: A fungicidal composition having fertilizer properties, the composition containing a high percentage of potassium polyphosphate is disclosed. The composition is useful as a fungicide and as a fertilizer for application to plants and, particularly, commercial crops. A method of making the polyphosphate composition is described, as well as methods of using same.Type: GrantFiled: February 6, 2006Date of Patent: February 15, 2011Inventor: Carl Fabry
-
Patent number: 7828871Abstract: The present invention provides fertilizer compositions comprising calcium and magnesium phosphates together with alkali metal double phosphates, and process for their preparation. The solid composition is freely flowing and well soluble.Type: GrantFiled: January 15, 2004Date of Patent: November 9, 2010Assignee: Rotem Amfert Negev Ltd.Inventors: Alexander Josef, Shula Tubov, Itshak Zukerman
-
Patent number: 7691171Abstract: 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 basic compound(s) selected from oxide(s) or carbonate(s) of magnesium, calcium, sodium and potassium, (b) neutralisation followed by drying and pulverisation.Type: GrantFiled: August 6, 2004Date of Patent: April 6, 2010Assignee: Department of Science & Technology (DST) A Department under the Ministry of Science and Technology, Government of IndiaInventor: Chandrika Varadachari
-
Patent number: 7670405Abstract: 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 polyphosphate is obtained and finally obtaining the dried powder.Type: GrantFiled: August 6, 2004Date of Patent: March 2, 2010Assignee: Department of Science & Technology (DST)Inventor: Chandrika Varadachari
-
Patent number: 7452398Abstract: The primary object of the invention is to provide a method of producing novel phosphate and potash (PK) containing compound fertilizers in the form of powders showing good handle-ability by which method the phosphate components contained in an incinerated ash residue of chicken droppings is improved in solubility and thus rendered effective or available and, at the same time, the free CaO-derived alkali is neutralized, as well as such novel phosphate and potash(PK) containing compound fertilizers.Type: GrantFiled: September 11, 2006Date of Patent: November 18, 2008Assignee: Murakashi Lime Industrial Co., Ltd.Inventors: Teruo Urano, Yuya Sato
-
Patent number: 7160350Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: March 10, 2005Date of Patent: January 9, 2007Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 7160349Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: November 12, 2004Date of Patent: January 9, 2007Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 6929673Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: August 11, 2000Date of Patent: August 16, 2005Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 6896714Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: October 14, 2003Date of Patent: May 24, 2005Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 6645268Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: January 13, 2003Date of Patent: November 11, 2003Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 6406510Abstract: 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 fertilizer, synthetic soil component or soil conditioner for pH control.Type: GrantFiled: November 17, 2000Date of Patent: June 18, 2002Assignee: Unified Environmental Services Group, LLCInventor: Jeffrey C. Burnham
-
Patent number: 6391080Abstract: 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 the wet process and much more energy efficient.Type: GrantFiled: November 2, 2000Date of Patent: May 21, 2002Inventor: Mohamed ElGafi
-
Patent number: 6231767Abstract: 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 about 4 to about 40 percent by weight, includes mixing a sufficient amount of deflocculating agent with a thickened phosphatic clay suspension to cause deflocculation of the suspension to an extent sufficient to reduce the viscosity thereof to a value enabling the deflocculated suspension to be readily pumped from one location to another, the deflocculating agent comprising an alkali compound of a phosphorus oxide. The deflocculated suspension of reduced viscosity is pumped from one location to another and separated into a clay suspension and a phosphatic mineral and sand suspension.Type: GrantFiled: February 16, 1999Date of Patent: May 15, 2001Assignee: Claytech Enviromental Services Inc.Inventors: David Krofchak, Roberto Berardi
-
Patent number: 6183532Abstract: 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 react exothermically with water and/or steam, or other substance; injection of at least one jet of water and/or steam, or of another substance, into the soil in such a way as to produce heat in the subsequent reaction with the compound. Between the two aforesaid phases it is convenient to proceed to break up the soil to favor its mixing with the compound and create the best conditions for the reaction.Type: GrantFiled: February 27, 1998Date of Patent: February 6, 2001Assignee: Alce Garden S.R.L.Inventor: Alfredo Celli
-
Patent number: 6113665Abstract: 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 of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus. Methods of supplying phosphorus to plants are also disclosed where the concentrated phosphorus fertilizers are delivered to plants and then sufficient water is applied to achieve a pH suitable for phosphorus uptake by the plant.Type: GrantFiled: July 30, 1998Date of Patent: September 5, 2000Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 5830255Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: May 3, 1996Date of Patent: November 3, 1998Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 5514200Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: February 7, 1994Date of Patent: May 7, 1996Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: 5378258Abstract: 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 injecting phosphate together with at least one sprayer for spraying the phosphoric acid solution and acting level with the free bottom end of the sleeve. The invention is applicable to the chemical industry.Type: GrantFiled: July 9, 1992Date of Patent: January 3, 1995Assignee: Maroc- ChimieInventor: El Hadi Kendili
-
Patent number: 5374294Abstract: 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 exhibits an Activity Index between 20 and 85. The release of all contained nutrients is substantially complete in one growing season without damage to plant foliage or roots. Divalent metals effectively forming the new composition include magnesium, manganese, zinc, iron, cobalt, and copper. The effective method of preparing the new composition requires the exothermic coreaction of concentrated potassium hydroxide, divalent metal oxide powder, and concentrated phosphoric acid, with a molecular ratio of 1 potassium/1 divalent metal/1 phosphate with the total water content of the initial reaction mixture between 20 and 50 percent, at a maximum temperature between 85.degree. and 150.degree. C.Type: GrantFiled: May 19, 1993Date of Patent: December 20, 1994Assignee: The Vigoro CorporationInventor: William P. Moore
-
Patent number: 5308372Abstract: 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 stream is enhanced.Type: GrantFiled: August 4, 1992Date of Patent: May 3, 1994Inventor: Ralph S. Daniels
-
Patent number: 5300136Abstract: 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 content of the flux serving as a source of potassium nutrient for the soil. The potassium in the spent flux is highly water soluble at all values of pH while the aluminum in the spent flux remains at a limited solubility, particularly under the conditions expected to be encountered in soil. Thus, despite the known phytotoxicity of aluminum and the presence of aluminum in the spent flux, the spent flux is discovered to be useful as a plant fertilizer with the maximum benefit from the potassium and minimal if any harm from the aluminum.Type: GrantFiled: July 2, 1992Date of Patent: April 5, 1994Assignee: Imco Recycling, Inc.Inventors: William O. Stauffer, F. Robert Hubbard
-
Patent number: 5211735Abstract: 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 simple, double or triple superphosphates, nitrogen-bearing (or not) phosphated partially acidulated, and superphosphated ammoniated, the product being adequate for use as a fertilizer, either powdered or slurried.The invention allows for a more complete reaction due to the better contact between the liquid and solid reagents besides the complete utilization of the heat produced in the reaction as well as in the acid dilution in the aqueous medium, for the vaporization of the water present in the process.Type: GrantFiled: August 15, 1991Date of Patent: May 18, 1993Assignee: Petroleo Brasileiro S. A.Inventors: Fabio G. M. Costa, Alberto C. C. Da Silva, Paulo C. W. De Albuquerque, Alberto Laranjeira
-
Patent number: 5035872Abstract: A method of preparing potassium magnesium phosphate hexahydrate by reacting calcium dihydrogen phosphate with potassium sulfate and a basic magnesium compound is described.Type: GrantFiled: May 3, 1990Date of Patent: July 30, 1991Assignee: Kali und Salz AktiengesellschaftInventors: Karl-Richard Loblich, Susanne Lange
-
Patent number: 4932993Abstract: 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 associated with in situ mass crystallization of monoammonium phosphate and which mass crystallization results in (1) the total prevention of further ammoniation of said acid or, at the very least, extremely slow further ammoniation thereof, and/or (2) excessive ammonia losses. Also, addition of said lignosulfonate to the acid prevents the formation of metallic impurity gel-like compounds which cause extremely high viscosities, nonpourability, and complete destruction of fluidity.Type: GrantFiled: November 7, 1988Date of Patent: June 12, 1990Assignee: Tennessee Valley AuthorityInventors: James R. Burnell, W. Keith Rylant
-
Patent number: 4883530Abstract: Soils are fertilized by a method in which ammonium syngenite (NH.sub.4).sub.2 SO.sub.4.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 applied to these soils, as a slow-acting nitrogen fertilizer, with the proviso that the molar ratio of Ca to SO.sub.4.sup.-- in the mixture is 1:2.+-.10%.Type: GrantFiled: March 17, 1988Date of Patent: November 28, 1989Assignee: BASF AktiengesellschaftInventors: Walter Von Maessenhausen, Vilmos Czikkely, Johann Jung
-
Patent number: 4838922Abstract: 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 3% to about 50% of the phosphoric acid/water mixture by weight, and the water comprises approximately 50% to about 97% of the phosphoric acid/water mixture by weight. The brown mud is added to the phosphoric acid/water mixture in a weight ratio of approximately 1:1 to about 1:3. The method of the present invention results in improved monocalcium phosphate products.Type: GrantFiled: January 27, 1988Date of Patent: June 13, 1989Assignee: Green, Inc.Inventor: Billy J. Green
-
Patent number: 4836843Abstract: 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 particularly effective in precision fertilizer delivery systems having small passages which would be adversely affected by insolubles.Type: GrantFiled: April 8, 1988Date of Patent: June 6, 1989Inventor: Ralph S. Daniels
-
Patent number: 4832735Abstract: A liquid fertilizer containing about 6% to 9% nitrogen (N), 24% to 30% phosphoruspentoxide (P.sub.2 O.sub.5), and 5% to 9% potassium oxide (K.sub.2 O). The fertilizer is produced by the reaction of ammonium phosphate solution with phosphoric acid and a potassium-containing compound, such as potassium hydroxide.Type: GrantFiled: April 7, 1988Date of Patent: May 23, 1989Assignee: Na-Churs Plant Food CompanyInventors: Walter C. Crouse, Owen M. McIntyre
-
Patent number: 4765822Abstract: 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 during digestion and filtration. The fluorine-containing air is scrubbed with water to prevent air pollution. Scrubber water is cooled in ponds and is recycled to the scrubber. However, fluorine compounds are emitted from the cooling ponds and cause air pollution. In the present invention, processes are disclosed for treating fluorine-containing gases without use of cooling ponds thereby eliminating the air pollution problem. A facility is provided for treating fluorine-containing gases wherein fluosilicic acid or fluosilicate salts are converted to a fluoride salt by the addition of an alkaline substance. A slightly acidic scrubber water is concentrated in an absorption tower.Type: GrantFiled: June 17, 1985Date of Patent: August 23, 1988Assignee: James C. Barber and Associates, Inc.Inventor: James C. Barber
-
Patent number: 4576627Abstract: 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 initially added to the brine followed by addition of ammonia or a basic form of potassium. The resulting precipitate is useful as a fertilizer. The remaining salt in the brine may then be removed and recovered along with purified process water.Type: GrantFiled: September 4, 1984Date of Patent: March 18, 1986Inventor: William B. Hughes
-
Patent number: 4557748Abstract: 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 preparation of liquid fertilizers which are less prone to settling out of the impurities during storage than would be the case without such treatment. It has unexpectedly been found that by limiting evaporation of water from the initial 26% to 32% P.sub.2 O.sub.5 wet-process acid to a level such that the acid has a P.sub.2 O.sub.5 content of from about 42% to about 45% and thereafter maintaining the semi-concentrated acid at a temperature within the range of from about 145.degree. F. to about 270.degree. F.Type: GrantFiled: August 24, 1984Date of Patent: December 10, 1985Assignee: Farmland Industries, Inc.Inventors: Norman L. Stewart, Jr., Ken E. Kranz
-
Patent number: 4536376Abstract: 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 g potassium sulfate. Precipitation forms with addition of calcium oxide or hydroxide equimolar to present magnesium sulfate and after phosphoric acid adjustment of the pH to 2-4, mechanical separation and addition of potassium sulfate and basic magnesium compounds, the desired product results.Type: GrantFiled: June 13, 1983Date of Patent: August 20, 1985Assignee: Kali und Salz AGInventor: Karl-Richard Loblich
-
Patent number: 4528021Abstract: 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 where heating is continued resulting in formation of a slurry. The slurry is continuously withdrawn and is split into two streams, one of which is recycled to either the pre-reactor or to the digester while the other stream is delivered to a granulator where it is mixed with other fertilizer ingredients and dried to form the granulated fertilizer.Type: GrantFiled: December 15, 1983Date of Patent: July 9, 1985Assignee: International Minerals & Chemical Corp.Inventor: John L. Medbery
-
Patent number: 4522638Abstract: A process for regulating the NH.sub.3 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 process, an ammonia-precipitating precipitant is added to the scrubbing agent and the precipitate is then separated from the scrubbing agent. Preferred precipitants include sulphuric acid and phosphuric acid. The ammonia salts are effective fertilizers.Type: GrantFiled: May 22, 1984Date of Patent: June 11, 1985Assignee: Linde AGInventor: Heinz Karwat
-
Patent number: 4496526Abstract: 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, with adjustment of the pH-value of the reaction mixture to 7.2 up to 8.5 through addition of quickly reacting basic compounds, in the presence of potassium magnesium phosphate seed crystals, whereupon the product is separated from the mother liquor and from this a part is recycled to the process start, and the rest is removed.Type: GrantFiled: February 7, 1983Date of Patent: January 29, 1985Assignee: Kali und Salz AGInventor: Karl-Richard Loblich
-
Patent number: 4475940Abstract: 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.Type: GrantFiled: January 18, 1983Date of Patent: October 9, 1984Assignee: Michigan Standard AlloysInventor: Harland H. Young
-
Patent number: 4457773Abstract: 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 increase the storage life of the fluidized fertilizer. In a second example dilute sulfuric acid is added to the mixture along with citric acid.Type: GrantFiled: June 21, 1983Date of Patent: July 3, 1984Assignee: Charles W. HelzerInventor: George S. Sley
-
Patent number: 4440560Abstract: 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 phosphoric acid contents of succeedingly added phosphatic fertilizers such as calcium superphosphate and calcium triple-superphosphate are not reduced or insolubilized by being reacted with such alkaline ingredients. Thus, unlike the prior art, a stabilized predetermined level of water-soluble phosphoric acid contents can be secured in the resultant mixed phosphatic fertilizer along with a predetermined level of citric acid-soluble phosphoric acid contents.Type: GrantFiled: December 22, 1981Date of Patent: April 3, 1984Assignee: Japan Metals and Chemicals Co., Ltd.Inventors: Teruo Nakamura, Michio Kiyoto, Kazuo Akashi, Isao Hasegawa
-
Patent number: H425Abstract: Process and Apparatus for preparing O--X--O and O--X--X (i.e., zero nitrogen) suspension fertilizers wherein phosphate rock is acidulated with merchant-grade wet-process orthophosphoric acid. The instant invention requires only a minimal amount of relatively inexpensive equipment. The process comprises a first-charging step wherein a reactor vessel is partially filled with water of formulation, phosphoric acid, and phosphate rock. The resulting mixture is subjected to a digestion step for a predetermined period of time to effect reaction of the acid and phosphate rock added thereto. Said digestion step is subsequently followed by a second-charging step wherein predetermined amounts of potassium chloride and/or suspending agent are added to said reactor vessel.Type: GrantFiled: September 26, 1986Date of Patent: February 2, 1988Assignee: Tennessee Valley AuthorityInventors: Herbert W. Norris, Jeffrey L. Boles
-
Patent number: RE41789Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: January 8, 2009Date of Patent: October 5, 2010Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt
-
Patent number: RE43073Abstract: 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 about 6.5 to about 8.5 at ratios of concentrate to water at about 1:40 to about 1:600 to result in a fertilizer having a pH in the range acceptable for foliar uptake of phosphorus.Type: GrantFiled: January 8, 2009Date of Patent: January 10, 2012Assignee: The Regents of the University of CaliforniaInventor: Carol J. Lovatt