Calcium Patents (Class 423/555)
  • Patent number: 10947155
    Abstract: Gypsum derived from waste gypsum boards is calcined and converted into gypsum granules including hemihydrate and/or anhydrous type III gypsum. The calcined gypsum granules are dropped into water to prepare a gypsum slurry. Then, dihydrate gypsum particles are crystalized in the slurry. The temperature of the gypsum granules just before being dropped into the water is 90° C. or higher.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: March 16, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Shingo Hiranaka, Kentaro Matsuo, Makoto Kataoka
  • Patent number: 9107834
    Abstract: The bright pigment of the present invention contains a scaly substrate 10 and an outermost coating 20 that covers the scaly substrate 10, that is provided as an outermost layer, and that contains at least one member selected from the group consisting of hydroxyapatite and hydrocalumite. The bright pigment of the present invention may be further provided with an interference color coating that is disposed more towards the center than the outermost coating and that contains at least one metal oxide selected from the group consisting of titanium oxide and iron oxide. Moreover, the bright pigment of the present invention may be further provided with a silver-containing coating that is disposed more towards the center than the outermost coating and that contains silver and/or a silver alloy. The outermost coating may contain an anionic pigment.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: August 18, 2015
    Assignee: Nippon Sheet Glass Company, Limited
    Inventor: Takeaki Kitamura
  • Publication number: 20150114268
    Abstract: The invention relates to a process for producing calcium sulphate dihydrate by reacting a water-soluble calcium compound with a water-soluble sulphate compound in the presence of water and a polymer containing acid groups, wherein the polymer containing acid groups comprises specific polyether groups. Additionally disclosed are calcium sulphate dihydrate producible by the process according to the invention, and the use thereof for production of gypsum plasterboard.
    Type: Application
    Filed: June 14, 2013
    Publication date: April 30, 2015
    Applicant: BASF Construction Solutions GmbH
    Inventors: Niklas Loges, Uwe Gehrig, Michael Schinabeck, Frank Dierschke, Michael Brau, Luc Nicoleau
  • Patent number: 9017640
    Abstract: Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: April 28, 2015
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Takayuki Nakai, Tatsuya Higaki, Yoshitomo Ozaki
  • Publication number: 20150072389
    Abstract: A method for the fractionation of lignocellulosic materials into reactive chemical feedstock in a batch or semi continuous process by the stepwise treatment with aqueous aliphatic alcohols in the presence of sulfur dioxide or acid. Lignocellulosic material is fractionated in a fashion that cellulose is removed as pulp, or converted to esterified cellulose, cooking chemicals are reused, lignin is separated in the forms of reactive native lignin and reactive lignosulfonates and hemicelluloses are converted into fermentable sugars, while fermentation inhibitors are removed. In an integrated vapor compression stripper and evaporator system, aliphatic alcohol is removed from a liquid stream and the resulting stream is concentrated for further processing.
    Type: Application
    Filed: May 9, 2014
    Publication date: March 12, 2015
    Inventors: Theodora RETSINA, Vesa PYLKKANEN, Rolf RYHAM
  • Publication number: 20150004249
    Abstract: Bone tissue materials comprising insulin-mimetic agents, such as suitable zinc, vanadium, tungsten, molybdenum, niobium, selenium, and manganese compounds, for facilitating spinal fusion of vertebrae in spinal fusion surgical procedures, and methods thereof. Additionally provided is a bone tissue kit for facilitating fusion of vertebrae in a spinal fusion surgical procedure including a composition formulated for facile application in a spinal fusion procedure comprising an insulin-mimetic agent and a pharmaceutically acceptable carrier. Yet further provided is an implantable device for enhancing spinal fusion including a prosthetic implant configured to stabilize and promote the fusion of two adjacent vertebrae, wherein the bone tissue contacting surfaces of the prosthetic implant are coated with a composition comprising an insulin-mimetic agent.
    Type: Application
    Filed: September 18, 2014
    Publication date: January 1, 2015
    Inventors: Sheldon S. Lin, John Koerner, Michael J. Vives, Joseph Benevenia, Eric Breitbart
  • Publication number: 20140377162
    Abstract: A method of forming a gypsum based product is disclosed. The method comprises the steps of: calcining a mixture of water and gypsum under conditions of raised temperature and pressure within a vessel to produce an alpha-hemihydrate slurry therein; passing the alpha-hemihydrate slurry from the vessel to a mixer for mixing with additional water to produce a settable slurry, which is arranged to set to form the gypsum based product.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 25, 2014
    Inventors: Jean-Louis Mongrolle, Jean-Luc Germain
  • Patent number: 8900535
    Abstract: In an embodiment, the present invention relates to an apparatus and a process for producing a concentrated form of basic zinc sulphate from a, typically dilute, acidic zinc sulphate-bearing solution. The process embodiment comprises the steps of precipitating the zinc, preferably primarily as basic zinc sulphate, from the acidic zinc sulphate solution, preferably using calcium oxide, in such a way as to promote the formation of separate gypsum crystals and basic zinc sulphate particles, and upgrading the zinc content in the precipitates by separating the basic zinc sulphate from the gypsum using size separation techniques.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: December 2, 2014
    Assignee: Barrick Gold Corporation
    Inventor: Yeonuk Choi
  • Publication number: 20140206614
    Abstract: Compositions and methods of using the compositions are provided for forming an embolus within a region of an anatomical lumen for a transitory period in order to achieve a therapeutic effect.
    Type: Application
    Filed: March 20, 2014
    Publication date: July 24, 2014
    Applicant: Abbott Cardiovascular Systems Inc.
    Inventors: Wouter E. Roorda, Stephen D. Pacetti
  • Patent number: 8623314
    Abstract: Processes for recovering ammonia from an ammonium sulfate stream include reacting the ammonia sulfate stream with a lime slurry to form a slurry comprising calcium sulfate and ammonia; providing the slurry comprising calcium sulfate and ammonia to a stripper configured to recover the ammonia from the slurry; utilizing a heat source from a chilled ammonia process to the stripper; and extracting an ammonia vapor stream from the stripper. Also disclosed are systems for performing the processes.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: January 7, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: David James Muraskin, Sanjay Kumar Dube
  • Patent number: 8562933
    Abstract: A hot solids process selectively operable for purposes of generating at least one predetermined output based on what the specific nature of the primary purpose of the hot solids process is for which the at least one predetermined output that is selected from a multiplicity of predetermined outputs, such as H2 and CO2, is being produced, and wherein such primary purpose of the hot solids process is designed to be pre-selected from a group of primary purposes of the hot solids process that includes at least two of the generation of H2 for electric power purposes, the generation of SynGas for electric power production as well as for other industrial uses, the production of steam for electric power generation as well as for other uses, the production of process heat, the production of CO2 for agricultural purposes, and the generation of a feedstock such as H2 for use for the production of liquid hydrocarbons.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: October 22, 2013
    Assignee: ALSTOM Technology Ltd
    Inventors: Herbert E. Andrus, Jr., John. H. Chiu, Gregory N. Liljedahl, Paul R. Thibeault, Carl R. Bozzuto, Corinne Beal, Michal T. Bialkowski, Andreas Brautsch, Laurent Maghdissian, Michel Vandycke
  • Patent number: 8535626
    Abstract: An exhaust gas treatment apparatus according to the present invention generates post-mercury oxidation exhaust gas by denitrating exhaust gas of a combustion apparatus, generates desulfurization drainage by desulfurizing the post-mercury oxidation exhaust gas, supplies the desulfurization drainage to the combustion apparatus, and controls a return amount, which is the amount of the desulfurization drainage reused for the desulfurization, based on a concentration of halogens in the desulfurization drainage. Such exhaust gas treatment apparatus can appropriately remove mercury from the exhaust gas, and can desulfurize the post-mercury oxidation exhaust gas more appropriately.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: September 17, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shintaro Honjo, Satoru Sugita
  • Patent number: 8529863
    Abstract: Disclosed is a process for the continuous modification of dihydrate gypsum. The process includes a hemihydration step of calcining the dihydrate gypsum as a raw material into hemihydrate gypsum and a recrystallization step of hydrating and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of a crystalline form different from the dihydrate gypsum as the raw material.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: September 10, 2013
    Assignee: Yoshino Gypsum Co., Ltd.
    Inventors: Itaru Yokoyama, Kouji Katsumoto, Yasuo Kawamura
  • Patent number: 8523975
    Abstract: Salts of mineral nutrients stabilized with amino acids and/or ammonium salt, product and food supplement in which they are included and procedures of obtention, where the salts are obtained with anions of organic acids or inorganic anions and metallic cations associated with amino acids and/or ammonium salt, in which the invention introduces its general structure: {[Ac]n?·Men+?n[Amino acid and/or ammonium salt]}·xH2O Where ? represents a covalent dative bond, These new compounds have better taste and more solubility in water, making them more bioavailable.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: September 3, 2013
    Inventors: Eduardo Walter Ettlin, Jose Ruben Boccio, Adrian Tomas De Paoli, Edgardo Adrian Hager, Pablo Adrian De Paoli
  • Patent number: 8475762
    Abstract: A method and apparatus for providing an evenly mixed additive enhanced gypsum slurry to a web. Calcined gypsum and water are inserted into a mixer through at least one inlet of the mixer. The contents are agitated to form a slurry. The slurry is passed from an outlet of the mixer into a conduit. An additive is introduced into the slurry along a length of the conduit to achieve a flow stream of a slurry/additive mixture. A cross section of the flow stream is expanded in the conduit while not changing direction of the flow stream and a direction of the flow stream is changed while not expanding the cross section of the flow stream and conduit, all prior to the flow steam exiting from an outlet of the conduit.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: July 2, 2013
    Assignee: United States Gypsum Company
    Inventors: Alfred Li, Chris C. Lee, Chris Nelson, Cesar Chan, Weixin David Song
  • Patent number: 8388926
    Abstract: The present invention relates to a system and associated method for the production of gypsum in manufacturing plant. More specifically, the invention relates to the production of alpha-type gypsum in a gypsum board manufacturing plant. The system yields increased efficiencies by capturing heat given off during processing steps and using that heat to reduce the energy needed for calcination. The invention finds particular application in the production alpha-type gypsum. The present invention is described in greater detail hereinafter in conjunction with the following specific embodiments.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: March 5, 2013
    Assignee: CertainTeed Gypsum, Inc.
    Inventor: John W. College
  • Patent number: 8377199
    Abstract: A gypsum stucco composition comprising the following components finely divided; calcium sulphate hemihydrate in calcined solid beta crystalline form; and in intimate mixture with said finely divided calcium sulphate hemihydrate and mixed therewith no later than calcination to form the hemihydrate, a sulphate salt comprising at least one of ammonium sulphate and aluminium sulphate, in an amount such that when the stucco composition is mixed with water and allowed to set, the resulting set plaster has increased compressive strength, flexural strength and/or E-modulus compared to a set plaster produced from said finely divided calcium sulphate hemihydrate containing no said sulphate salt.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: February 19, 2013
    Assignee: BPB Limited
    Inventors: Cedric Biguenet, Sam O'Keefe, Agnès Smith, Thierry Chotard
  • Publication number: 20130022533
    Abstract: A method of manufacturing hemihydrate gypsum powders for the production of a gypsum molded product from gypsum board waste, comprising at least the following two steps in a random order: a compression step for compressing gypsum obtained from gypsum board waste; and a baking step for converting dihydrate gypsum obtained from gypsum board waste to hemihydrate gypsum.
    Type: Application
    Filed: April 12, 2012
    Publication date: January 24, 2013
    Inventors: Shingo Hiranaka, Genji Taga
  • Publication number: 20120316340
    Abstract: The use of metal-accumulating plants for implementing chemical reactions.
    Type: Application
    Filed: November 18, 2010
    Publication date: December 13, 2012
    Applicants: UNIVERSITE MONTPELLIER 2 SCIENCES ET TECHNIQUES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Claude Grison, Jose Escarre
  • Patent number: 8282731
    Abstract: A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: October 9, 2012
    Assignee: The Nugyp Corp.
    Inventors: Robert Byron Bruce, Mark Richard Flumiani, Charles E. Blow
  • Patent number: 8231850
    Abstract: Provided is a fixation method of carbon dioxide. The method includes a) grinding waste gypsum to become 200˜300 mesh; b) performing reaction by supplying mixed gas while mixing the ground waste gypsum with aqueous ammonia, and c) separating solid from liquid in the manufactured slurry by centrifugation and drying separated solid and liquid portions with calcite and ammonium sulfate, wherein the mixed gas is formed of nitrogen and carbon dioxide, and the carbon dioxide provides carbon dioxide fixation method containing 5˜25 wt %. When carbon dioxide is fixed by using waste gypsum, reaction efficiency is remarkably high. The fixation method makes more than 95% of supplied carbon dioxide fixed. Also, provided is an economical method that disposes carbon dioxide as a disposal target without its separation, refinement and liquefaction processes, to thereby remarkably reduce the entire process and costs for processes.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: July 31, 2012
    Assignee: Korea Institute of Geoscience and Mineral Resources
    Inventors: Young Nam Jang, Kyung Won Ryu, Myung Gyu Lee
  • Patent number: 8206670
    Abstract: Process for producing sodium bicarbonate for purifying flue gases, according to which an aqueous solution containing sodium sulfate is subjected to electrodialysis to produce a sodium hydroxide solution and a sodium bisulfate solution, the sodium hydroxide solution being carbonated in order to obtain sodium bicarbonate.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: June 26, 2012
    Assignee: Solvay SA
    Inventors: Jean-Paul Detournay, Francis Coustry
  • Patent number: 8128903
    Abstract: The invention relates to a method of controlling the solubility of granular material by treating a precipitate comprising iron(II)sulphate monohydrate originating from titanium dioxide production, in which method the reaction temperature is allowed to increase at the most to a temperature of 120° C., to a plant for treating a precipitate comprising iron(II)sulphate monohydrate, to a product and its uses. A typical method according to the invention comprises the steps of mixing water to the reaction mixture in the said mixing apparatus, and keeping the amount of neutralizing agent sufficient to give a pH value from 1.5 to 4, preferably from 1.5 to 3, to the end product in order to obtain a granular material having a high soluble iron(II) content or keeping the amount of neutralizing agent sufficient to give a pH value ?9 to the end product in order to obtain a granular material having a low solubility.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: March 6, 2012
    Assignee: Sachtleben Pigments Oy
    Inventors: Juhatuomas Vuorisalo, Joni Pärnänen
  • Patent number: 8124039
    Abstract: A process of producing silicon tetrafluoride from fluoride containing feedstocks. The process calcines the fluoride containing feedstock and a silica containing feedstock before reacting the mixture with sulfuric acid to produce silicon tetrafluoride. The silicon tetrafluoride is scrubbed with sulfuric acid. Excess sulfuric acid is recycled to the process. The process demonstrates an economic and environmentally friendly way to produce high quality silicon tetrafluoride.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: February 28, 2012
    Inventors: Vithal Revankar, Sanjeev Lahoti
  • Publication number: 20120035107
    Abstract: Compositions and methods of using the compositions are provided for forming an embolus within a region of an anatomical lumen for a transitory period in order to achieve a therapeutic effect.
    Type: Application
    Filed: September 24, 2011
    Publication date: February 9, 2012
    Inventors: Wouter E. Roorda, Stephen D. Pacetti
  • Patent number: 8088349
    Abstract: Disclosed is a clean method for preparing layered double hydroxides (LDHs), in which hydroxides of different metals are used as starting materials for production of LDHs by atom-economical reactions. The atom efficiency of the reaction is 100% in each case because all the atoms of the reactants are converted into the target product since only M2+(OH)2, M3+(OH)3, and CO2 or HnAn? are used, without any NaOH or other materials. Since there is no by-product, filtration or washing process is unnecessary. The consequent reduction in water consumption is also beneficial to the environment.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: January 3, 2012
    Assignee: Beijing University of Chemical Technology
    Inventors: Xue Duan, Dianqing Li, Zhi Lv, Yanjun Lin, Xiangyu Xu
  • Patent number: 8088348
    Abstract: An air pollution control system for a coal combustion boiler includes: a NOx removing apparatus that reduces nitrogen oxide contained in flue gas emitted from this coal combustion boiler, an air pre-heater that recovers heat in the gas, a precipitator 15 that reduces particulates from the gas, a liquid-gas contact type desulfurizer that removes sulfur oxide by way of a limestone-gypsum method and reduces mercury oxide in the gas, a stack that releases the gas after SOx removal to the exterior, and a solid-liquid separator that extracts limestone-gypsum containing slurry from the desulfurizer to the exterior and performs a solid-liquid separation, where water separated in the solid-liquid separator is removed, and concentrated slurry is sent back to the bottom of the desulfurizer to make the gypsum concentration of slurry equal to or higher than 10 percent in the desulfurizer.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: January 3, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Nobuyuki Ukai, Shintaro Honjo, Susumu Okino
  • Patent number: 8043594
    Abstract: Methods and systems for generating sulfuric acid are disclosed. In some embodiments, the method includes combusting a sulfur-containing material with a gas including oxygen to produce a first stream of sulfur dioxide, mixing water with the first stream of sulfur dioxide to produce a mixed stream, using an energy, electrolytically converting the mixed stream of sulfur dioxide and water into sulfuric acid and hydrogen, generating a source of energy from the hydrogen, and providing the source of energy as at least a portion of the energy for electrolytically converting the first stream of sulfur dioxide and water into sulfuric acid and hydrogen. In some embodiments, the system includes a first chamber for combusting a sulfur-containing material to produce a first stream of sulfur dioxide, an electrolytic cell for converting the first stream into sulfuric acid and hydrogen, and a fuel cell for generating an energy source from the hydrogen.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: October 25, 2011
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Klaus S. Lackner, Tim A. Rappold
  • Publication number: 20110198285
    Abstract: A desalination and minerals extraction process includes a desalination facility fluidly coupled to a minerals extraction facility. The desalination facility includes a nanofiltration membrane section producing a first tailings stream and a reverse osmosis membrane section producing a second tailings stream and a desalinated water outlet stream from an inlet feed stream. The extraction facility produces at least one mineral compound, an extraction tailings stream, and a second desalinated water outlet stream. At least one of the first tailings stream and the second tailings stream is fed into the extraction facility. In certain exemplary embodiments, a natural gas combined cycle power unit supplies power to at least one of the desalination facility and the extraction facility. In certain exemplary embodiments, the extraction tailings stream is recycled into the desalination facility and there are no extraction tailings streams or desalination tailings streams discharged into the environment.
    Type: Application
    Filed: June 18, 2010
    Publication date: August 18, 2011
    Applicant: KATANA Energy LLC
    Inventor: Paul Steven Wallace
  • Publication number: 20110190446
    Abstract: Provided is a three-dimensional modeling apparatus including a supply mechanism, a deposition area, a variable mechanism, a discharge mechanism, and a control means. The supply mechanism supplies a powder material. In the deposition area,, the supplied powder material is deposited. The variable mechanism varies a volume of the deposition area per a predetermined layer thickness, and thus the powder material is deposited per the predetermined layer thickness in the deposition area. The discharge mechanism discharges liquid for forming a three-dimensional object to the deposited powder material, the liquid being capable of hardening the powder material. The control means causes the discharge mechanism to discharge the liquid to the powder material, to thereby form a main body being an object being as a target to be modeled and a frame body being an object to be formed in a periphery of the main body, of the three-dimensional object.
    Type: Application
    Filed: January 11, 2011
    Publication date: August 4, 2011
    Applicant: Sony Corporation
    Inventors: Takeshi Matsui, Junichi Kazusako, Hiroyuki Yasukochi
  • Publication number: 20110165059
    Abstract: In an embodiment, the present invention relates to an apparatus and a process for producing a concentrated form of basic zinc sulphate from a, typically dilute, acidic zinc sulphate-bearing solution. The process embodiment comprises the steps of precipitating the zinc, preferably primarily as basic zinc sulphate, from the acidic zinc sulphate solution, preferably using calcium oxide, in such a way as to promote the formation of separate gypsum crystals and basic zinc sulphate particles, and upgrading the zinc content in the precipitates by separating the basic zinc sulphate from the gypsum using size separation techniques.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 7, 2011
    Applicant: BARRICK GOLD CORPORATION
    Inventor: Yeonuk Choi
  • Publication number: 20110150750
    Abstract: A method for the calcination of powdery or fine-particled plaster includes steps in which the plaster is subjected to a flash-calcination in a calcinator and then post-calcinated in a reaction vessel. The post-calcination is carried out in the reaction vessel by adding humid gas, the reaction vessel not being heated. This post-calcination takes place over a long period of time, that is at least 10 times, preferably 50-100 times longer than, the amount of time taken for flash calcination. Complete calcination can take place without expending additional energy, and the remaining dihydrate produced during the flash calcination is also transformed into semi-hydrate and undesired anhydrite fractions are reduced. The method ensures consistency in the product quality and also increases product quality. The temperature in the upstream calcinator can be lowered to save energy. The method can also be used to accelerate the ageing of calcined plaster.
    Type: Application
    Filed: May 11, 2009
    Publication date: June 23, 2011
    Applicant: Claudius Peters Technologies GmbH
    Inventors: Volker Goecke, Peter Hilgraf
  • Publication number: 20110135930
    Abstract: Disclosed is a process for the continuous modification of dihydrate gypsum. The process includes a hemihydration step of calcining the dihydrate gypsum as a raw material into hemihydrate gypsum and a recrystallization step of hydrating and recrystallizing the hemihydrate gypsum in an aqueous slurry to convert the hemihydrate gypsum into modified dihydrate gypsum of a crystalline form different from the dihydrate gypsum as the raw material.
    Type: Application
    Filed: July 31, 2009
    Publication date: June 9, 2011
    Applicant: YOSHINO GYPSUM CO., LTD.
    Inventors: Itaru Yokoyama, Kouji Katsumoto, Yasuo Kawamura
  • Patent number: 7955587
    Abstract: The present invention relates to a system and associated method for the production of gypsum in manufacturing plant. More specifically, the invention relates to the production of alpha-type gypsum in a gypsum board manufacturing plant. The system yields increased efficiencies by capturing heat given off during processing steps and using that heat to reduce the energy needed for calcination. The invention finds particular application in the production alpha-type gypsum. The present invention is described in greater detail hereinafter in conjunction with the following specific embodiments.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: June 7, 2011
    Assignee: CertainTeed Gypsum, Inc.
    Inventor: John College
  • Patent number: 7951352
    Abstract: Disclosed is a method for producing alpha-calcium sulfate hemihydrate from calcium dihydrate. Said method has the following features: a) calcium dihydrate is fed to an agitated autoclave (1); b) the agitated autoclave (1) is indirectly heated; c) water is added and incorporated in a controlled manner; d) the feedstock is prevented from adhering to surfaces of the reaction chamber by means of moved chains (3) that are mounted on the paddles and/or the drive shaft (16) of the agitated autoclave (1); e) the pressure in the reaction chamber is regulated at intervals or in a continuous manner by discharging vapor when a certain pressure has been reached in the interior, the vapor being conducted via a centrifugal separator (17) and a control valve (18); f) cold air is delivered for residual drying purposes; g) the process material is removed. Also disclosed is a corresponding apparatus for carrying out said method.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: May 31, 2011
    Assignee: Grenzebach-BSH GmbH
    Inventors: Reinhard Jäger, Alfred Brosig
  • Patent number: 7928033
    Abstract: The present invention relates to a catalyst for reducing mercury, which comprises a reagent comprising any of the sulfites of potassium, sodium, calcium and magnesium, or any of the phosphates thereof, or a combination of them, as a main reagent of a catalyst component. And the present invention relates to the catalyst for reducing mercury, wherein the catalyst component is mixed with a different salt as an agent for inhibiting crystallization of the catalyst component.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: April 19, 2011
    Assignees: Horiba, Ltd., Nippon Instruments Corporation
    Inventors: Shigeyuki Akiyama, Junji Kato, Fujio Koga, Koji Ishikawa
  • Patent number: 7910230
    Abstract: The preparation of gypsum parts (dihydrate calcium sulfate) with high mechanical strength is obtained with the aid of water layers with nanometric thickness. Calcium sulfate is used, dihydrate as well as hemihydrate, to obtain parts from these two materials, pure or mixed, especially to use in construction work, where the parts are prepared by compressing their slightly humidified powders.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: March 22, 2011
    Assignee: Inovamat, Inovacao Em Materiais Ltda.
    Inventors: Milton Ferreira de Souza, Hebert Luis Rossetto, Wellington Massayuki Kanno
  • Patent number: 7897134
    Abstract: A system (100) for calcining natural gypsum, synthetic gypsum (112) or a combination thereof, the system including: a mill (114) for grinding and drying natural gypsum, synthetic gypsum (112) or a combination thereof, to produce dried gypsum (116); a flash calciner (118) for calcining the dried gypsum to produce an exhaust gas (130) and calcined gypsum (128); and a mechanism (134) for transporting at least a portion of the exhaust gas (130) produced by the flash calciner (118) to an air heater (126) that supplies hot gas (126a) to the flash calciner (118).
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: March 1, 2011
    Assignee: ALSTOM Technology Ltd
    Inventor: Michael M. Chen
  • Publication number: 20110044883
    Abstract: A method of purifying flue gas desulfurization (FGD) gypsum. The method includes the steps of a) providing an aqueous slurry containing said FGD gypsum, b) passing the aqueous slurry to a magnetic separator, and c) contacting the FGD gypsum to be purified with a solution containing an acid and having pH below 5 in an acid washing step. Also, a purified FGD gypsum obtained by the inventive method and the use thereof as coating or filler pigment for paper or board.
    Type: Application
    Filed: April 8, 2009
    Publication date: February 24, 2011
    Applicant: KEMIRA OYJ
    Inventor: Perttu Heiska
  • Patent number: 7887769
    Abstract: A method of removing sulfur dioxide from flue gases using calcium and magnesium scrubbing components and treatment of oxidized effluent from such a system includes passing classified oxidized effluent to a regeneration tank and adding lime to produce a regenerator discharge containing magnesium hydroxide, gypsum and crystalline inert material. Gypsum is separated from the discharge and a magnesium hydroxide stream passed to a concentration system to produce a concentrated solids stream of magnesium hydroxide, residual minor amount of gypsum and crystalline inert material. A portion of the resultant stream is returned to the sulfur dioxide removal system while a portion is passed to the oxidizer. Further portions may be fed to a power plant boiler or to the flue gas stream between a solids collection device and the wet scrubber.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: February 15, 2011
    Assignee: Carmeuse Lime, Inc.
    Inventor: Kevin J. Smith
  • Publication number: 20110034318
    Abstract: A process for heat treatment of fine-grained mineral solids includes passing fine-grained mineral solids through a flash reactor so as to contact the fine-grained mineral solids with hot gases in the flash reactor at a temperature of 450 to 1500° C. so as to obtain hot solids. The hot solids arc passed through a residence time reactor at a temperature of 500 to 890° C. The hot solids are withdrawn from the residence time reactor after a residence time of 1 to 600 minutes. A waste gas of the residence time reactor is recirculated to at least one of the flash reactor and a preheating stage.
    Type: Application
    Filed: April 20, 2009
    Publication date: February 10, 2011
    Applicant: OUTOTEC OYJ
    Inventors: Edgar Gasafi, Guenter Schneider, Michael Missalla
  • Publication number: 20110011311
    Abstract: A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure.
    Type: Application
    Filed: September 24, 2010
    Publication date: January 20, 2011
    Inventors: Robert Byron Bruce, Mark Richard Flumiani, Charles E. Blow
  • Patent number: 7824490
    Abstract: A process for treating beta calcium sulfate hemihydrate is disclosed. The process comprises exposing beta calcium sulfate hemihydrate to steam at a pressure above atmospheric pressure.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: November 2, 2010
    Assignee: The Nugyp Corp.
    Inventors: Robert Byron Bruce, Mark Richard Flumiani, Charles E. Blow
  • Patent number: 7803396
    Abstract: A product controlling dissolving rate of biomedical orthopedic implant material and a process of manufacturing the same are disclosed. At constant temperature and humidity and under vacuum, treatment solution is forced to diffuse to the material to form a second phase as a means of controlling the dissolving rate. Different treatment solution can form the phases having different structures from that of matrix. The inventive product has a structure of laminate concentric circle. The second phase and the structure of laminate concentric circle are used as ways for medicine release.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: September 28, 2010
    Inventor: Chin-Chi Yeh
  • Patent number: 7799310
    Abstract: Methods and systems for generating sulfuric acid (102) are disclosed. In some embodiments, the method includes combusting a sulfur-containing material (114) with a gas including oxygen (116) to produce a first stream of sulfur dioxide (118), mixing water with the first stream of sulfur dioxide to produce a mixed stream, using an energy, electrolytically converting (108) the mixed stream of sulfur dioxide and water into sulfuric acid (102) and hydrogen (122), generating a source of energy (126) from the hydrogen, and providing the source of energy as at least a portion of the energy for electrolytically converting the first stream of sulfur dioxide and water into sulfuric acid and hydrogen. In some embodiments, the system includes a first chamber for combusting a sulfur-containing material to produce a first stream of sulfur dioxide, an electrolytic cell (108) for converting the first stream into sulfuric acid and hydrogen, and a fuel cell (112) for generating an energy source from the hydrogen.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: September 21, 2010
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Klaus S. Lackner, Tim A. Rappold
  • Publication number: 20100202990
    Abstract: The invention aims at providing a powder cosmetic which does not suffer from the aggregation of powder even when it contains a large amount of oily component and in which no caking of powder on the surface occurs even when pressed, and a process for the production of platy calcium sulfate dihydrate usable for the cosmetic. The process of the production includes a process for producing a powder cosmetic comprising calcium sulfate dihydrate and an oily component, and a process for producing platy calcium sulfate dihydrate which process comprises dissolving a calcium salt in an organic acid and reacting the resulting calcium solution with sulfuric acid.
    Type: Application
    Filed: May 30, 2008
    Publication date: August 12, 2010
    Applicant: OHKEN CO., LTD.
    Inventors: Togo Murata, Tetsuo Murata
  • Patent number: 7771851
    Abstract: The invention provides gypsum wallboard, made from gypsum-containing slurries having outstanding hydration rate characteristics comprising alpha-hemihydrate ground to a particular particle size distribution range and having a Blaine surface area in the range from about 3100 cm2/g to about 9000 cm2/g, alone or in combination with beta-hemihydrate.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: August 10, 2010
    Assignee: United States Gypsum Company
    Inventors: Weixin David Song, Qiang Yu, Qiangxia Liu
  • Patent number: 7771700
    Abstract: Systems are disclosed for making and using micro-porous particulates at least partially composed of metal sulfides, particularly alkaline earth metal and transition metal sulfides, as sorbents for removal of mercury from flue gas. Calcium sulfide micro-porous powders derived from the high temperature reduction of calcium sulfate and calcium sulfite are disclosed to be reactive substrates for a group of sorbents for adsorption of mercury from coal combustion flue gases produced by the utilities industry, as well as from natural gas and gaseous and liquid hydrocarbons. The sorbents are useful for cost-effectively adsorbing elemental mercury and oxidized mercury species such as mercuric chloride from flue gases, including those containing acid gases (e.g., SO.sub.2, NO and NO.sub.2, and HCl), over a wide range of temperatures.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: August 10, 2010
    Assignee: Chemical Products Corp.
    Inventors: Lloyd Ballard Mauldin, Jerry Allen Cook
  • Publication number: 20100166640
    Abstract: Disclosed is a method for producing alpha-calcium sulfate hemihydrate from calcium dihydrate. Said method has the following features: a) calcium dihydrate is fed to an agitated autoclave (1); b) the agitated autoclave (1) is indirectly heated; c) water is added and incorporated in a controlled manner; d) the feedstock is prevented from adhering to surfaces of the reaction chamber by means of moved chains (3) that are mounted on the paddles and/or the drive shaft (16) of the agitated autoclave (1); e) the pressure in the reaction chamber is regulated at intervals or in a continuous manner by discharging vapor when a certain pressure has been reached in the interior, the vapor being conducted via a centrifugal separator (17) and a control valve (18); f) cold air is delivered for residual drying purposes; g) the process material is removed. Also disclosed is a corresponding apparatus for carrying out said method.
    Type: Application
    Filed: May 20, 2008
    Publication date: July 1, 2010
    Applicant: Grenzebach-BSH GmbH
    Inventors: Reinhard Jäger, Alfred Brosig
  • Publication number: 20100143236
    Abstract: Calcium fluoride fines or residues comprising calcium fluoride fines, e.g. residues from treating waste water or waste gas, e.g. originating from HF or fertilizer production, with calcium oxide or calcium carbonate to remove HF or fluorides can be converted to HF and calcium sulfate by reaction with sulfuric acid in the form of a suspension. Unreacted calcium oxide or calcium carbonate generates sufficient heat to the endothermic reaction between calcium fluoride and sulfuric acid so that no external heat is needed.
    Type: Application
    Filed: January 31, 2008
    Publication date: June 10, 2010
    Applicant: SOLVAY FLUOR GMBH
    Inventor: Helmut Grass