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  • Differences Between Sulfides And Oxides Difference Between
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    The sulfides and the oxides are two examples which are consistently mistaken for each other Here is where they differ First what you have to understand is that sulfides are minerals that contain sulfur These minerals are inorganic compounds which means that they are formed through geological rather than biological process...

  • PDF Ambient
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    Schematic diagram of ambient-air sulfurization route for CZTS thin film and relevant solar cell a oxides NP ink b deposition of oxides precursor c ambient-air sulfurization self-creating...

  • WO2013077296A1
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    The purpose of the present invention is to provide a method for producing a high-purity nickel sulfate with less impurities especially with less magnesium or less chlorides by regulating the concentration of the extractant and the pH concentration during the processing in a step for obtaining a nickel sulfate solution with high nickel concentration by means of solvent extraction using an...

  • Sulfidation
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    Differences Between Sulfides And Oxides Difference Between...

  • Desulfurization
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    However research demonstrates that an iron oxide sold sponge -- ie wood shavings infused with iron or ferric oxide -- is effective in hydrogen desulfurization by first absorbing the H2S and then converting ferric oxide into ferric sulfide The ferric sulfide subsequently reverts to ferric oxide after releasing elemental sulfur In Summary...

  • Methods for recovering sodium sulfides from a sulfur
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    In either case the conversion of calcium oxides to calcium sulfides may take place in the presence of carbon dioxide DESCRIPTION OF THE PREFERRED EMBODIMENTS The inventive method acts to regenerate calcium oxides after they have been converted to calcium sulfides according to a hydrogen sulfide scavenging process...

  • Preparation of hydroxyalkyl phosphine oxides and sulfides
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    A process for the preparation of 2-hydroxyalkylphosphine oxides and sulfid The corresponding 2-acyloxyphosphine is hydrolyzed or alcoholyzed and oxidized in either order to produce the desired 2-hydroxyalkylphosphine oxide or sulfide The product may contain one two or three 2-hydroxyalkyl groups depending on the phosphine starting material used...

  • Stabilization of lanthanum sulfides with different dopants
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    Jun 09 2012 0183 32 By introducing different dopants into the lattice lanthanum sulfides with higher stability were prepared via the sulfurization of lanthanum oxides using CS2 gas at 1 000 176 C The sulfurizing time of 8 hours was optimized for La/Ca=2 at 1 000 176 C and its sulfurization mechanism to form CaLa2S4 was via the reaction of β-La2S3 with CaS As the increase of the La/Ca and La/Na ratio longer...

  • US10286373B2
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    Methods of sulfurizing metal containing particles in the absence of hydrogen are described One method includes contacting a bed of metal containing particles with a gaseous stream comprising hydrogen sulfide and inert gas under reaction conditions sufficient to produce sulfided metal containing particl The gaseous stream is introduced into a vertical reactor at an inlet positioned at the...

  • Copper processing
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    Copper processing - Copper processing - Roasting smelting and converting Once a concentrate has been produced containing copper and other metals of value such as gold and silver the next step is to remove impurity elements In older processes the concentrate containing between 5 and 10 percent water is first roasted in a cylindrical refractory-lined furnace of either the hearth or...

  • WO2014081389A1
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    The invention relates to anode materials suitable for use in batteries such as lithium ion batteries and sodium ion batteri In particular the anode material is a reduced graphene oxide/metal sulfide composite Methods for forming the reduced graphene oxide/metal sulfide composite are also disclosed...

  • ROASTING OF SULFIDE MINERALS
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    1 Decomposition of higher sulfides to lower sulfides for example MS 2 240 222 s =MS s 240 222 1 2 S 2 240 222 g 240 2 1 222 2MS 2 240 222 s =M 2S 3 240 222 s 1 2 S 2 240 222 g 240 2 2 222 2 Oxidation of sulfides to form oxides or sulfates 2MS s 240 222 3O 2 240 222 g =2MO s 240 222 2SO 2 240 222 g 240 2 3 222 MS s 240 222 2O 2 240 222 g =MSO 4 240 222 240 s 2 4 222 3 Burn-up of sulfur to form its oxides S...

  • Lanthanum oxide sulfurization in ammonium rhodanide vapor
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    Aug 23 2014 0183 32 We have studied phase formation processes in the La-O-S system during La2O3 sulfurization in ammonium rhodanide vapor and identified the sequence of steps in lanthanum oxide conversion into oxysulfides and lanthanum sulfide using X-ray diffraction IR absorption spectroscopy and Raman spectroscopy In the initial stage of the sulfurization process we observed the formation...

  • Synthesis of Nanoporous Metals Oxides Carbides and
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    For nanoporous metal sulfides an oxide-to-sulfide synthetic strategy was proposed to address the large volume change issue of converting metal nitrate precursors to metal sulfide products in nanocasting The successful syntheses of ordered nanoporous FeS2 CoS2 and NiS2 demonstrated the feasibility of the oxide-to-sulfide method...

  • US2772947A
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    US2772947A US217310A US21731051A US2772947A US 2772947 A US2772947 A US 2772947A US 217310 A US217310 A US 217310A US 21731051 A US21731051 A US 21731051A US 2772947 A US2772947 A US 2772947A Authority US United States Prior art keywords nickel sulfide sulfate oxygen catalyst Prior art date 1951-03-23 Legal status The legal status is an assumption and is not a legal...

  • Bifunctional Transition Metal Hydroxysulfides Room
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    Transition metal sulfides oxides transition hydroxides continuously convert to sulfides driven by the thermodynamic equilibrium This method is applicable to underwent a room-temperature sulfurization process in which the hydroxides were immersed in a 20 m Na...

  • Catalysis Science Technology
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    sulfurization starts from the external surface of the oxide pre-cursor particles and then proceeds inwards through the dif-fusion of sulfur atoms from the outer layer until the oxide precursor has been converted into sulfide completely 10 the whole process needs several hours because the diffusion rate...

  • Sulfurization behavior of thorium dioxide with carbon
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    A novel reprocessing process based on sulfide chemistry has been proposed for the recovery of nuclear materials from spent fuel To apply the sulfide process in the thorium fuel cycle the...

  • conferenceseriioporg materials science and engineering
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    Fundamental Study of the Sulfide Reprocessing Process for Oxide Fuel I Study on the Pu MA and FP Tracer-Doped U3O8 Akira KIRISHIMA et al- To understand the phase change of PuO2 in the sulfurization process CeO2 was sulfurized by CS2 as a chemical analog of PuO2 then analyzed by the XRD 2 Experiment 21...

  • Preparation of hydroxyalkyl phosphine oxides and sulfides
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    I claim 1 A process for the preparation of hydroxyalkylphosphine oxides and sulfides comprising the steps of 1 alcoholysis and 2 oxidation of an ester-substituted phosphine having the structural formula STR4 where R and R 1 are hydrogen alkyl aryl cycloalkyl aralkyl or A--OCOR 2 A is ethylene or propylene and R 2 is alkyl of 2-17 carbon atoms...

  • The sulfurization recorded in tridymite in the monomict
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    Jun 29 2020 0183 32 The sulfurization genesis of the SRT of tridymite was first proposed in the study of noncumulate eucrites eg Ono et al 2016 2017 We speculate that the sulfurization in NWA 11591 may be an open relatively high temperature gt 800 176 C process which superimposed on the prolonged subsolidus thermal metamorphism in the shallow crust of Vesta...

  • Liquid metal deposition process developed for wafer
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    The direct conversion of Ga oxide to GaS takes place at about 900 176 C Daeneke knew that converting the Ga oxide to GaCl 3 first by reacting it with HCl would allow subsequent sulfurization at a 300 176 C Now we can suddenly print it on all sorts of materials like...

  • Fast sulfurization of nickel foam
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    Sep 20 2019 0183 32 The other sulfurization method is carried out by calcination of metal or metal precursor in the presence of sulfurization agents such as sulfur powder at high temperature during which the sulfur-containing vapor will react with metal or metal precursor to form metal sulfide As a result it is found that both methods are conducted at...

  • Nickel processing
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    Various processes are used to treat nickel matte One process is the ammonia pressure leach in which nickel is recovered from solution using hydrogen reduction and the sulfur is recovered as ammonium sulfate for use as fertilizerIn another the matte may be roasted to produce high-grade nickel oxides these are subjected to a pressure leach and the solution is electro- and carbonyl refined...

  • Sulfidation
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    Sulfidation British spelling also sulphidation is a process of installing sulfide ions in a material or molecule The process is widely used to convert oxides to sulfides but is also related to corrosion and surface modification Inorganic materials and organic chemistry Sulfidation is relevant to the formation of sulfide minerals A large scale application of sulfidation is the...

  • Partial Sulfurization of Oxide Fine Particles and their
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    Dec 01 2010 0183 32 Above 380 Â 176 C the sulfurization of the bulk proceeded slowly accompanied with weight increase and at around 450 Â 176 C the conversion of oxide to sulfide progressed rapidly until 730 Â 176 C according with the eq 7 There was a markedly weight increase in this range of temperatures reaching the maximum value of 197 at 730 Â 176 C...

  • EP2784166A1
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    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...

  • PDF Synthesis of Iron Sulfide and Iron Oxide Nanocrystal
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    Chi and Liu developed a combined physical vapor deposition PVD and thermal vapor sulfurization technique to produce FeS 2 thin-films In this process Fe 3 S 4 thin-films are deposited together...

  • OCEAN ANOXIA Microbial sulfate reduction and organic
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    OM sulfurization reactions alongside organic sulfides disulfides andaromatics 34 XAS results integrate organic S formed both before and during field incubations so any combi-nation of these organic S forms could be the products of de novo sulfurization during ship-board incubations Still itisclearthatthat hydrolysis-resistant OMcan be a...

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