Alkaline Treatment Patents (Class 71/42)
  • Patent number: 10197272
    Abstract: The description relates to a process for reducing acid plume from stacks from coal-fired combustors operating at varying loads, which have typically been treated by back-end calcium carbonate (limestone) which has not been able to effectively control visible acid plume as power is ramped up from low load. According to the process, as high sulfur and high iron coals are burned in a combustor, magnesium hydroxide slurry is introduced into hot combustion gases in or near the combustion zone. And, during ramp up to high load from a period of operation at low load, additional magnesium hydroxide is introduced into an intermediate-temperature zone.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: February 5, 2019
    Assignee: FUEL TECH, INC.
    Inventors: Ian Saratovsky, Scott K. Bohlen, Chrisopher R. Smyrniotis, Kent W. Schulz, Emelito P. Rivera
  • Patent number: 9169165
    Abstract: A liquid foliar nutrient composition comprising oil, essential element(s) and optionally, a surfactant to enable a stable useable dispersion of the oil and the essential element(s) to be formed.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: October 27, 2015
    Assignee: Innovative Chemical Services Pty Ltd
    Inventors: Robert William Killick, Andrew Robert Killick, Peter William Jones, John David Morrison
  • Patent number: 8216337
    Abstract: A process for the preparation of water insoluble bio-release micronutrient fertilizers, containing iron and manganese with either zinc and/or copper, comprising (a) heating orthophosphoric acid at a temperature of 130° C.-150° C. with a mixture of (i) source of iron oxide, (ii) manganese dioxide or pyrolusite, and (iii) either or both compounds of zinc or copper selected from zinc ash or zinc oxide and cupric oxide, or cupric sulphate or cupric chloride and (iii) a basic compound such as oxide or carbonate of magnesium or calcium, to produce a multi-metallic polyphosphate; (b) neutralization of the polyphosphate with a basic compound followed by drying and pulverization to obtain a solid powdery material.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: July 10, 2012
    Assignee: National Research Development Corp.
    Inventor: Chandrika Varadachari
  • Publication number: 20110296885
    Abstract: A macronutrient sustained release composition for a plant locus containing a nanocomposite wherein a nitrogen containing macronutrient compound adsorbed on the surface of hydroxy apatite phosphate nanoparticles is intercalated within the interlayer spacing of a nanoclay. The nanocomposite containing the adsorbed macronutrient compounds is slowly released in a sustained manner when contacted with an acidic soil.
    Type: Application
    Filed: June 5, 2010
    Publication date: December 8, 2011
    Applicant: SRI LANKA INSTITUTE OF NANOTECHNOLOGY (PVT) LTD.
    Inventors: Kottegoda Nilwala, Imalka Munaweera, A. Nadeesh Madusanka, Veranja Karunaratne
  • Publication number: 20100311584
    Abstract: Provided is a freely flowing particulate fertilizer essentially consisting of potassium phosphate of the formula K3H3(PO4)2 and of less than 8 wt % water. The stable and not caking fertilizer is characterized by an XRD signal corresponding to 2-theta of about 70°. An economic process for making the fertilizer is also provided consisting in reacting KOH and monopotassium phosphate (KH2PO4) in water, heating the mixture under vacuum and cooling it down, thereby obtaining the particulate fertilizer.
    Type: Application
    Filed: November 13, 2008
    Publication date: December 9, 2010
    Applicant: ROTEM AMFERT NEGEV LTD.
    Inventors: Alexander Josef, Itshak Zukerman
  • Publication number: 20100206032
    Abstract: A process for the preparation of water insoluble bio-release micronutrient fertilizers, containing iron and manganese with either zinc and/or copper, comprising (a) heating orthophosphoric acid at a temperature of 130° C.-150° C. with a mixture of (i) source of iron oxide, (ii) manganese dioxide or pyrolusite, and (iii) either or both compounds of zinc or copper selected from zinc ash or zinc oxide and cupric oxide, or cupric sulphate or cupric chloride and (iii) a basic compound such as oxide or carbonate of magnesium or calcium, to produce a multi-metallic polyphosphate; (b) neutralisation of the polyphosphate with a basic compound followed by drying and pulverisation to obtain a solid powdery material.
    Type: Application
    Filed: June 21, 2006
    Publication date: August 19, 2010
    Applicant: NATIONAL RESEARCH DEVELOPEMENT CORPORATION
    Inventor: Chandrika Varadachari
  • Patent number: 7175683
    Abstract: A process for transforming sludge into npk type granulated fertilizer in which the energy consume is reduced a 90% thanks to the addition of a special filtration step in which the water content is reduced a 50% and the remaining water is evaporated by the exothermic reaction occurring in the process. Additionally, the process of the present invention includes mechanisms that allow some of the by products generated by some of the reactions such as gypsum, to adsorb crystallization water and reduce the humidity of the mass without using external energy.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: February 13, 2007
    Assignee: Chemical Biosolids, Inc.
    Inventor: José Cabello-Fuentes
  • Patent number: 7135116
    Abstract: The present invention relates to a process for treating a wastewater comprising an ammonium ion species and a phosphorus ion species. The process comprises the steps of: (i) treating the effluent in a first stage of the process to convert the phosphorus to a phosphorus-containing salt; (ii) treating the wastewater in a second stage of the process to convert the ammonium ion species to gaseous ammonia; (iii) removing the struvite and/or other phosphorous containing salts from the effluent; and (iv) removing the gaseous ammonia from the wastewater.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: November 14, 2006
    Inventor: Kenneth Haggerty
  • Patent number: 6830696
    Abstract: A method of treating spent alkaline pulping liquor (black liquor) includes the steps of providing black liquor containing lignin, and acidulating a phosphate containing material, wherein phosphoric acid is generated by the acidulating step. The black liquor is mixed with phosphoric acid from the acidulated phosphate containing material, wherein lignin is separated and clarified liquor results. The method can include the step of adding a water soluble, surface active, polymeric, coagulant agent to the black liquor before mixing with the phosphoric acid from the phosphate containing material. The clarified liquor comprises anion species including phosphate.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: December 14, 2004
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: Hassan E. El-Shall, El-Sayed A. Abdel-Aal
  • Patent number: 6569342
    Abstract: A method is providing for treating waters, such as standing and flowing waters and waste waters, soils, sediments and/or silts. At least one alkaline earth metal peroxide is brought into contact with such waters or the like, especially to effect immobilization of phosphates and heavy metals except manganese and iron therein.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: May 27, 2003
    Inventors: Thomas Willuweit, Stefan Nowicki, Kai-Uwe Ulrich, Gerald Jakobson
  • Patent number: 6506805
    Abstract: A magnesium ammonium phosphate slurry and method of producing magnesium ammonium phosphate slurries. The method provides for obtaining a magnesium hydroxide supply having a small particle size of about 2 microns. Aqua ammonia and phosphoric acid are sequentially added while maintaining the temperature at below 110° F. The magnesium ammonium phosphate hexahydrate slurry formed has a small particle size of about 2 to 7 microns. The hexahydrate slurry may be converted to a monohydrate slurry having a particle size of less than about 8 microns by heating to the boiling point in the presence of excess water or heating to the boiling point while maintaining a very moderate hydrostatic pressure.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: January 14, 2003
    Inventors: J. Richard Green, Warren D. Winterson
  • Patent number: 6476082
    Abstract: A magnesium ammonium phosphate slurry and method of producing magnesium ammonium phosphate slurries. The method provides for obtaining a magnesium hydroxide supply having a small particle size of about 1 to 2 microns. Aqua ammonia and phosphoric acid are sequentially added while maintaining the temperature at below 110° F. The magnesium ammonium phosphate slurry formed has a small particle size of about 2 to 5 microns.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: November 5, 2002
    Assignee: Magline, Inc.
    Inventor: J. Richard Green
  • Patent number: 5859124
    Abstract: A lubricant is provided for use in hot working such as cross-roll rolling of a seamless steel pipe. It effectively reduces the friction coefficient between the working tools and the material under the hot work, thus extending the lives of the tools. The lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.0 wt % of at least one kind of alkali compound selected from a group consisting of an alkali hydroxide, an alkali carbonate, an alkali borate and an alkali salt of mineral acid; and (D) from about 30 to about 70 wt % of water. Alternatively, the lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: January 12, 1999
    Assignee: Kawasaki Steel Corporation
    Inventors: Akira Yorifuji, Takaaki Toyooka, Ken Shimamoto, Masaharu Kita, Taro Kanayama
  • Patent number: 5028252
    Abstract: A fertilizer composition and method for the detoxification and deacidification of soil threatened by acidic deposits which comprises at least one alkali-reactive component, selected from the group which consists of calcium, magnesium, potassium, sodium, ammonium and ammonia compounds in soil neutralizing amounts and at least one water soluble pyrophosphate or polyphosphate capable of forming water insoluble salts with aluminum and heavy metals of a similar magnitude as the diphosphates.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: July 2, 1991
    Assignee: Lang & Co., Chemisch-Technische Produkte Kommanditgesellschaft
    Inventor: Gertrude Kaes
  • Patent number: 5019148
    Abstract: A stepwise method of preparing homogeneous mineral granules for agriculture by coreaction of commodity acids and bases which have properties to chemically form a transient fluid adhesive which will harden to form a strong granule binding cement. Water may be added to improve the effectiveness of the adhesive. The transient fluid adhesive is comminuted by mechanically shearing, then particulate mineral solids are admixed mechanically to form a mass of plastic globules which is rolled to form spheroid granules and the fluid adhesive hardens to form the hardened binding cement. The method provides substantially dust-free and attrition resistant animal feed supplement, and plant food fertilizer and micronutrient granules. The commodity acids and bases include aqueous and anhydrous mineral and alkyl carboxylic acids and alkali and alkaline earth bases.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: May 28, 1991
    Assignee: Agrinutrients Technology Group, Inc.
    Inventor: William P. Moore
  • Patent number: 4792349
    Abstract: The present invention teaches a technique and provides for apparatus eminently useful for the econimic recovery of Fe, Zn, and S from waste galvinizer sulfuric acid and crystals of iron sulfate and zinc sulfate. The technique or method of the instant invention involves the ammoniation of the acid or a solution prepared from such crystals followed by the partial oxidation of the resulting ammoniated suspension to a point where the desired product magnetite is formed in the separated from a marketable solution of ammoniacal zinc sulfate. The effecting of the instant technique requires only a minimal amount of relatively inexpensive equipment and is simply and easily placed into practice by, for example, sparging anhydrous ammonia into a stirred tank of waste acid until the Ph is elevated to about 10. Air can be sparged through the resulting slurry to oxidize the iron in the acid. After a proper incubation period, the desired stable product, e.g.
    Type: Grant
    Filed: November 3, 1987
    Date of Patent: December 20, 1988
    Assignee: Tennessee Valley Authority
    Inventors: Joe R. Trimm, Louis A. Stumpe
  • Patent number: 4650682
    Abstract: Apparatus and process for chemically treating particulate solids material in free flowing condition with fluid reactants in a drum reactor having an acidifying chamber in which acid is introduced into the solids material and an ammoniation chamber in which ammonia is introduced into the solids material.
    Type: Grant
    Filed: February 23, 1983
    Date of Patent: March 17, 1987
    Assignee: Agro-Systems Inc.
    Inventor: Arthur R. Shirley, Jr.
  • Patent number: 4427432
    Abstract: The process allows essentially all of the nitrogen and P.sub.2 O.sub.5 values in the treated black ammonium polyphosphate liquid to be recovered in the form of valuable clarified product. In the process, a heel of black liquid fertilizer is first clarified by a prior-art procedure using flocculants. The improvement over the prior art picks up with the byproduct tops which is then diluted with the water of formulation required to dissolve additional amounts of ammonium polyphosphate melt. This diluted liquid is filtered, the filter cake containing upwards of 99 percent of the undesirable black carbonaceous material is discarded, and the clear filtrate, which contains essentially all of the nitrogen and P.sub.2 O.sub.5 originally in the tops, is then used in lieu of the prior-art water of formulation to dissolve additional ammonium polyphosphate melt to produce more black ammonium polyphosphate liquid.
    Type: Grant
    Filed: August 12, 1982
    Date of Patent: January 24, 1984
    Assignee: Tennessee Valley Authority
    Inventors: Horace C. Mann, Jr., Kenneth E. McGill
  • Patent number: 4331465
    Abstract: The invention relates to a method of preventing smoldering decomposition of multiple-nutrient fertilizers containing ammonium nitrate at elevated temperatures by treatment of the granulated, dried and screened fertilizer with ammonia.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: May 25, 1982
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Heinrich Hahn, Hans-Friedrich Kurandt
  • Patent number: 4248617
    Abstract: This invention relates to a process for producing a granular phosphate fertilizer by reacting and granulating simultaneously a mixture of a basic material which contains acid-soluble CaO and acid-soluble MgO, and also acid-soluble SiO.sub.2, with phosphoric acid and/or an acidic phosphate in such a mixing ratio thatA/MO=0.05-0.45[in which MO represents moles of the acid-soluble alkaline earth metals in the basic material (calculated as their oxides) and A represents moles of the phosphoric acid or the free phosphoric acid derived from the acidic phosphate (calculated as P.sub.2 O.sub.5)]. This process makes use of industrial wastes, as the starting basic material, such as slag discharged from metal refining and fly ash. The granular fertilizer obtained by the process is high in granule hardness, easy to handle, and high in phosphate fertilization effect and gives an effect on improving acidic soil.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: February 3, 1981
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Seiichi Kamo, Tetzuo Watanabe, Kiyoshi Nakayama
  • Patent number: 4106922
    Abstract: A process for the production of highly citrate-soluble calcined phosphate fertilizers is disclosed. The process comprises calcinating a mixture which comprises appropriate amounts of calcium phosphates, silicic acid and an alkaline decomposing agent whereby the naturally occurring mineral trona is used as an alkaline decomposing agent. The process is effected in a rotary kiln; the maximum temperature is about 1300.degree. C.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: August 15, 1978
    Assignee: Kali-Chemie
    Inventors: Ulrich Hauschild, Heinrich Roetger
  • Patent number: 3932166
    Abstract: A method for converting organic waste materials into inert humus-like materials by charring the organic waste materials by heating and drying same in the presence of certain water-soluble inorganic acids, removing residual acid and other water-soluble contaminants by washing the crude char product with water, and utilizing the resulting inert material as a landfill. If desired, the humus-like char products can be reacted with an alkali at elevated temperatures, and the resulting alkali salts of humic-acid-like materials can be mixed with the soil to provide an improved and/or fertilized topsoil.
    Type: Grant
    Filed: May 15, 1974
    Date of Patent: January 13, 1976
    Inventors: Martin Vignovich, Russell B. Sperry