Patents Examined by Justin Bova
  • Patent number: 9481936
    Abstract: A platelet-type zirconium phosphate, which has a P—OH group contained in a structure thereof, and has a crystalline peak at a 2? value of 11.6±2 degrees and no crystalline peak at a 2? value of less than 11.6±2 degrees in X-ray diffraction analysis, is provided. The platelet-type zirconium phosphate has a platelet-type structure and can be uniformly dispersed at a nanoscale level in a coating film to exhibit excellent surface gloss and barrier capability. Also, the platelet-type zirconium phosphate can exhibit excellent corrosion resistance due to the presence of the P—OH group on a surface thereof, and can be dispersed not only in an aqueous solution but also in an organic solvent.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: November 1, 2016
    Assignee: POSCO
    Inventors: Bongwoo Ha, Jin Tae Kim, Jong Sang Kim, Yang-Ho Choi
  • Patent number: 9371230
    Abstract: A method for producing phosphoric acid, comprising attack in an aqueous medium of phosphated rock with sulfuric acid, with formation of a first dihydrate slurry suspended in an aqueous phase having a free P2O5 content between 38 and 50% and a free SO3 content of less than 0.5%, conversion of this first slurry by heating with recrystallization of the solubilized calcium sulfate giving rise to a second hemihydrate slurry, and separation in the second slurry between a production phosphoric acid and a hemihydrate cake, characterized in that it comprises during the attack, addition of a fluorine source in the first slurry in a content from 1% to 5% by weight of F relatively to the P2O5 contained in the phosphated rock.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: June 21, 2016
    Assignee: Prayton Technologies
    Inventors: Antoine Hoxha, Dorina Fati
  • Patent number: 9327975
    Abstract: A method is disclosed for obtaining dinitrogen monoxide by stepwise reduction of nitrates and/or nitrites from substances containing nitrate and/or nitrite, the reduction reaction being interrupted or limited after the step in which the dinitrogen monoxide is formed and the dinitrogen monoxide produced in the reduction reaction being separated, captured and/or collected.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: May 3, 2016
    Inventors: Thomas Finke, Ulrich Finke
  • Patent number: 9315391
    Abstract: The invention relates to an ammonia gas generator for producing ammonia from an ammonia precursor substance as well as the use thereof in exhaust after treatment systems. The invention further relates to a method for producing ammonia gas to reduce nitrogen oxides in exhaust gases, in particular combustion gases from internal combustion engines such as diesel engines.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: April 19, 2016
    Assignee: ALZCHEM AG
    Inventors: Christian Gerhart, Thomas Sattelmayer, Plamen Toshev
  • Patent number: 9272914
    Abstract: A uniform Si—NH—Si terminated Si(111) surface is formed by contacting a chlorine-terminated silicon surface with ammonia and a solvent such as an ether.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: March 1, 2016
    Assignee: UNIVERSITY OF DELAWARE
    Inventors: Fangyuan Tian, Douglass F. Taber, Andrew V. Teplyakov
  • Patent number: 9255010
    Abstract: Provided are: a novel bonds useful as a highly-functional material; and a novel production method for a polycrystalline sintered product of a bonds, of which the energy cost is low, which does not require a sintering promoter, which enables the product to be worked into complicated forms and which enables a development to a polynary boride. Provided are a boride having a composition Na—Si—B, and a polycrystalline reaction-sintered product thereof. A mixed compact of boron and an element, M (M means Si and/or C) is heated along with metal sodium to give a polycrystalline reaction-sintered product.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: February 9, 2016
    Assignee: TOHOKU UNIVERSITY
    Inventors: Haruhiko Morito, Hisanori Yamane
  • Patent number: 9255006
    Abstract: The invention relates to a method for producing phosphoric acid, including: attacking phosphate rock by means of sulfuric acid between 70° and 90° C. with formation of a first calcium sulfate dihydrate crystal slurry, the aqueous acid phase of said slurry having free P2O5 content between 38 and 50 wt % and free SO3 content that is less than 0.5 wt % and greater than 0.05 wt %; converting said first slurry by means of heating at a temperature greater than 90° C., thus giving rise to a second slurry formed of calcium sulfate hemihydrate crystals; and, within the second slurry, separating a produced phosphoric acid, having a free SO3 content that is less than 2%, and a calcium sulfate hemihydrate filter cake.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: February 9, 2016
    Assignee: PRAYON TECHNOLOGIES
    Inventors: Antoine Hoxha, Dorina Fati
  • Patent number: 9221682
    Abstract: A process for producing NO gas from a feed flow of air or oxygen enriched air, by means of moving an electric arc through the air flow by using a magnetic field and AC or DC currents, in a reactor, wherein a pressure lower than 1 bar is applied, wherein the temperature in the exited arc is adjusted to be within the range of 3000 to 5000 Kelvin, and wherein the air flow is quenched by applying a spray of fine water droplets upstream or just downstream the arc, excess air feed or bypassed air to obtain a stable NO-containing plasma having a temperature below 2000 Kelvin.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: December 29, 2015
    Assignee: N2 APPLIED AS
    Inventor: Rune Ingels
  • Patent number: 9199855
    Abstract: The invention provides methods and compositions for improving the rheology of red mud removed from Bayer Process liquor. The method includes adding a flocculant and a cross-linked polysaccharide to the liquor. This combination separates the red mud from the liquor but also prevents the red mud from becoming too thick. By preventing excessive thickness, the method allows for the formation of extremely dense amounts of red mud even in primary settlers because the dense red mud can still flow. As a result a user can simultaneously enjoy both easy handling of red mud and also high recovery rates of valuable alumina and caustic from the red mud.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: December 1, 2015
    Assignee: Nalco Company
    Inventors: Carl Urbani, John D Kildea, Ryan Chester, Jing Wang
  • Patent number: 9199849
    Abstract: A process for producing nitric acid is disclosed in which a gaseous oxidizer feed composed at least substantially of ammonia, steam and an oxidizing gas is exposed to conditions whereby the ammonia is oxidized to produce a reaction mixture including nitrogen monoxide and water vapor. The reaction mixture is then cooled in a heat exchanger whereby: a) the nitrogen monoxide is oxidized and the water vapor is caused to condense, b) the products of the nitrogen monoxide oxidation react with and are absorbed by the condensed water, and c) substantially all of the nitrogen monoxide in the reaction mixture is converted to nitric acid. Also disclosed is a nitric acid solution when produced by the disclosed process.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: December 1, 2015
    Assignees: ORICA INTERNATIONAL PTE LTD, THE UNIVERSITY OF SYDNEY
    Inventors: Anthony Matthew Johnston, Brian Scott Haynes
  • Patent number: 9187327
    Abstract: A method for minimizing the addition of water to a phosphoric acid production process is described. The method uses phosphoric acid to make down a flocculant that is added to the process in order to promote filtration or clarification of crude phosphoric acid. Preferably, the phosphoric acid is a crude, clarified phosphoric acid that is recycled from the phosphoric acid production process itself.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: November 17, 2015
    Assignee: Nalco Company
    Inventors: Ronald V. Davis, Wayne L. Moss, Michael G. Strominger, Randon Renzello, Thomas A. Faigl, Daniel N. T. Hay
  • Patent number: 9175367
    Abstract: A process for neutralization is provided which can maintain a high solid content of a bauxite dissolution residual substance slurry even after a neutralization treatment is completed and the stabilize pH within a short time of the neutralization treatment. Such a process for neutralizing a bauxite dissolution residual substance containing a desiliconizing product which is generated in the production process of aluminum hydroxide using Bayer process, includes: mixing a bauxite dissolution residual substance or a bauxite dissolution residual substance slurry with sulfuric acid in an amount ranging from 0.6 to 1.2 equivalence to the total amount of sodium contained in the bauxite dissolution residual substance or a bauxite dissolution residual substance slurry, such that the solid content after mixing becomes 400 to 700 g/l to gelate the mixture, and thereafter obtaining a bauxite dissolution residual substance neutralized slurry.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 3, 2015
    Assignee: SHOWA DENKO K.K.
    Inventor: Isao Ishikawa
  • Patent number: 9174852
    Abstract: The invention provides methods and compositions for improving the production of alumina trihydrate. The invention involves adding one or more cross-linked polysaccharides to a filter used to separate solids from liquid in the Bayer process. The one or more polysaccharides can be a cross-linked polysaccharide (such as cross-linked dextran or cross-linked dihydroxypropyl cellulose). The cross-linked polysaccharides can impart a number of advantages including greater flow rate and lower residual moisture in the resulting cake.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: November 3, 2015
    Assignee: NALCO COMPANY
    Inventors: Ryan Chester, Jing Wang, John D Kildea
  • Patent number: 9156692
    Abstract: According to the method for producing bis(fluorosulfonyl)imide salt of the present invention, the method for producing fluorosulfate, and the method for producing bis(fluorosulfonyl)imide onium salt, first, an aqueous solution is prepared by dissolving a mixed liquid containing bis(fluorosulfonyl)imide and fluorosulfonic acid in water. Then, the aqueous solution is neutralized with an alkaline compound, producing bis(fluorosulfonyl)imide salt and fluorosulfate. In the methods, bis(fluorosulfonyl)imide salt, fluorosulfate, and bis(fluorosulfonyl)imide onium salt can be obtained safely and easily.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: October 13, 2015
    Assignee: Mitsubishi Materials Electronic Chemicals Co., Ltd.
    Inventors: Tsunetoshi Honda, Takeshi Kamiya
  • Patent number: 9133036
    Abstract: The present invention relates to a method for obtaining borazane, said method being suitable for obtaining borazane containing a low level of impurities. The borazane (obtained by reaction of at least one ammonium salt with at least one alkali and/or alkaline earth metal borohydride) in solution in THF is selectively precipitated with a non-solvent. The precipitated borazane can further be purified by selective dissolution. The borazane obtained after selective precipitation and dissolution contains less than 1% by weight of impurities and/or does not exhibit exothermic decomposition in the solid state with a temperature range of the endothermic melting peak above 110° C.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: September 15, 2015
    Assignee: HERAKLES
    Inventors: Jean-Philippe Goudon, Joël Renouard
  • Patent number: 9133029
    Abstract: A method for making lithium iron phosphate is provided. In the method, an alkali is reacted with a ferric salt in water to form a red colored ferric hydroxide precipitate in the water. The red colored ferric hydroxide precipitate is mixed with deionized water, organic solvent, and emulsifier to form an water-in-oil emulsion. The phosphoric acid solution and iron metal powder are added to the water-in-oil emulsion to form ferrous hydrogen phosphate. A lithium source is introduced to the water-in-oil emulsion and reacted with the ferrous hydrogen phosphate to form a precursor in the water-in-oil emulsion. The precursor is heated in a protective gas at a heating temperature in a range from about 600° C. to about 800° C. to form lithium iron phosphate.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: September 15, 2015
    Assignees: Tsinghua University, HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventors: Yu-Ming Shang, Yao-Wu Wang, Xiao-Feng Xie, Shu-Bo Wang, Jin-Hai Wang, Yong-Gang Liu, Xiao Zhao, Jing-Bo Chen, Mou Fang
  • Patent number: 9126242
    Abstract: A bell jar includes a metallic bell jar (1), and a metallic base plate (2) on which the bell jar (1) is placed, and packing (3) seals an inside of a container. To the base plate (2), a pressure gauge (4), a gas introduction line (5), and a gas discharge line (6) are connected so as to allow monitoring of internal pressure of the bell jar (1) and introduction and discharge of a gas. A vacuum pump (7) is provided in a path of the gas discharge line (6), and the vacuum pump (7) reduces internal pressure of the bell jar so as to be lower than vapor pressure of water. The vacuum pump (7) reduces the internal pressure of the bell jar so as to be lower than vapor pressure of water, thereby efficiently removing moisture, and completing drying of the bell jar in a short time.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: September 8, 2015
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yasushi Kurosawa, Kyoji Oguro, Shinichi Kurotani, Shigeyoshi Netsu
  • Patent number: 9114989
    Abstract: This invention is directed to a method for recovering, purifying and recycling an inert gas on a continual basis in connection with a silicon crystal pulling process. Silicon oxide impurities generated during the crystal growth process are completely oxidized by in-situ oxidation with a regulated amount of an oxidizing source gas mixture to form silicon dioxide impurities, which can be removed by a particulate removal device. The particulate-free effluent enters a purification unit to remove the remaining impurities. The inert gas emerging from the purification unit can be fed back into the crystal puller apparatus and/or mixed with the oxidizing source gas mixture. As a result, the ability to increase silicon crystal throughput, quality and at the same time reduce the costs associated with recycling the inert gas can be achieved.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: August 25, 2015
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Lingyan Song, Lloyd Anthony Brown
  • Patent number: 9114997
    Abstract: Processes for producing polycrystalline silicon by thermal decomposition of silane are disclosed. The processes generally involve thermal decomposition of silane in a fluidized bed reactor operated at reaction conditions that result in a high rate of productivity relative to conventional production processes.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: August 25, 2015
    Assignee: SunEdison, Inc.
    Inventors: Satish Bhusarapu, Puneet Gupta, Yue Huang
  • Patent number: 9114996
    Abstract: Processes for producing polycrystalline silicon by thermal decomposition of silane are disclosed. The processes generally involve thermal decomposition of silane in a fluidized bed reactor operated at reaction conditions that result in a high rate of productivity relative to conventional production processes.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: August 25, 2015
    Assignee: SunEdison, Inc.
    Inventors: Satish Bhusarapu, Puneet Gupta, Yue Huang