1147results about "Bismuth compounds" patented technology

A single crystalline ternary nanostructure having the formula A_xB_yO_z, wherein x ranges from 0.25 to 24, and y ranges from 1.5 to 40, and wherein A and B are independently selected from the group consisting of Ag, Al, As, Au, B, Ba, Br, Ca, Cd, Ce, Cl, Cm, Co, Cr, Cs, Cu, Dy, Er, Eu, F, Fe, Ga, Gd, Ge, Hf, Ho, I, In, Ir, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Nd, Ni, Os, P, Pb, Pd, Pr, Pt, Rb, Re, Rh, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Tc, Te, Ti, Ti, Tm, U, V, W, Y, Yb, and Zn, wherein the nanostructure is at least 95% free of defects and/or dislocations.

The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.

The present invention provides methods for producing bis(fluorosulfonyl) compounds of the formula:

F—S(O)₂—Z—S(O)₂—F  I

by contacting a nonfluorohalide compound of the formula:

X—S(O)₂—Z—S(O)₂—X

with bismuth trifluoride under conditions sufficient to produce the bis(fluorosulfonyl) compound of Formula I, where Z and X are those defined herein.

Improved methods for the extraction or dissolution of metals, metalloids or their oxides, especially lanthanides, actinides, uranium or their oxides, into supercritical solvents containing an extractant are disclosed. The disclosed embodiments specifically include enhancing the extraction or dissolution efficiency with ultrasound. The present methods allow the direct, efficient dissolution of UO2 or other uranium oxides without generating any waste stream or by-products.

There is disclosed a piezoelectric element having, on a substrate, a piezoelectric body and a pair of electrodes which come in contact with the piezoelectric body, wherein the piezoelectric body consists of a perovskite type oxide represented by the following formula (1):

(Bi,Ba)(M,Ti)O₃  (1)

in which M is an atom of one element selected from the group consisting of Mn, Cr, Cu, Sc, In, Ga, Yb, Al, Mg, Zn, Co, Zr, Sn, Nb, Ta, and W, or a combination of the atoms of the plurality of elements.

A material capable of producing a sintered body of cubic system garnet type Li₇La₃Zr₂O₁₂ as a solid electrolyte having specified ion conductivity by firing at relatively low temperature in short time. The material for the solid electrolyte is an oxide containing Li, La, Zr and Bi, and the oxide has a cubic system garnet crystal structure where La sites are partly or entirely substituted by Bi.

Compounds are expressed by general formula of AxBC2-y where 0<=x<=2 and 0<=y<1, and have CdI2 analogous layer structures; A-site is occupied by at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Ir, Pt, Au, Sc, rare earth elements containing Y, B, Al, Ga, In, Tl, Sn, Pb and Bi; B-site is occupied by at least one element selected from the group consisting of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W, Ir, and Sn; C-site is occupied by at least one element selected from the group consisting of S, Se and Te; the compounds exhibit large figure of merit so as to be preferable for thermoelectric generator/refrigerator.

A perovskite compound of the formula, (Na_1/2Bi_1/2)_1-xM_x(Ti_1-yM′_y)O_3±z, where M is one or more of Ca, Sr, Ba, Pb, Y, La, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb and Lu; and M′ is one or more of Zr, Hf, Sn, Ge, Mg, Zn, Al, Sc, Ga, Nb, Mo, Sb, Ta, W, Cr, Mn, Fe, Co and Ni, and 0.01<x<0.3, and 0.01<y<0.3, and z<0.1 functions as an electromechanically active material. The material may possess electrostrictive or piezoelectric characteristics.

A method of purifying an acid leaching solution obtained by processing hydrometallurgically material that contains valuable metals and also Fe3+ and Fe2+, and possibly also arsenic in solution. The major part of the Fe3+-content and the arsenic is precipitated out in a first stage, by adding pH-elevating agent to the leaching solution. The precipitate formed in the first precipitation stage is extracted from the solution and removed from the process. The solution is oxidised in a second precipitation stage while adding a further pH-elevating agent for oxidation of Fe2+ and precipitation of resultant Fe3+ and any arsenic still present. The resultant precipitate and any residual solid pH-elevating agent are then extracted from the solution and returned in the process to more acid conditions, and the thus purified solution is then processed to win its valuable metal content in a manner per se. The pH is suitably raised during the first stage to a value in the range of 2.2-2.8, and in the second stage to a value in the range of 3.0-4.5. The oxidising process in the second stage is suitably effected by injecting air into the solution and by preferably using lime or limestone as the pH-elevating agent. Solid material extracted from the second stage is returned beneficially to the first stage. Some of the solid material taken from each precipitation stage can be recycled within respective stages as a nucleating agent.

The invention discloses bismuth vanadate powder and a preparation method thereof. The method comprises the following steps: firstly, bismuth-bearing compounds and vanadium-bearing compounds are respectively dissolved in a nitric acid, mixed and then added with a hexadecyl trimethyl ammonium bromide solution, the mol ratio of bismuth to vanadium to the nitric acid to hexadecyl trimethyl ammonium bromide is 1 to 1 to 2.5 to 0.025, and the mixture is stirred for 1 to 2 hours by magnetic force so as to form a bismuth vanadate precursor; the bismuth vanadate precursor is placed in a reaction kettle, undergoes hydrothermal treatment for 70 to 75 hours at a temperature of between 80 and 200 DEG C, cooled, centrifugally separated, and then added with a saturated sodium chloride solution of anhydrous ethanol and deionized water; ion-exchange is performed after the bismuth vanadate precursor is completely immersed, and then centrifugal separation is performed; and finally the bismuth vanadate precursor is washed for 3 to 5 times by mixture of the deionized water and ethanol, then the bismuth vanadate powder with microspheric and/or micro-flaky particles is prepared. The method has simple operation and mild conditions; and bismuth vanadate powder particles prepared are uniform, have large specific surface area, have the characteristics of good visible light response and high photocatalytic activity, and are suitable for industrialized production.

The invention relates to a bismuthyl carbonate micro flowery material with a graded structure, which is structurally characterized in that two-dimensional nano flakes are staggered to form a flower shape, and the average diameter of the flakes is 3 to 4 microns. The material is prepared by fist dissolving bismuth nitrate into dilute nitric acid and then gradually dripping the dilute nitric acid into excessive sodium carbonate solution and reacting the solution. A preparation method can be implemented at the low temperature and the normal pressure, and has the advantages of short time consumption, low cost, simple equipment, easy operation and large-scale production. Because of a large specific surface area, the prepared bismuthyl carbonate micro flowery material with the graded structure has important practical application in the aspects of pharmacy and sterilization; and meanwhile, the material with the large specific surface area has good performance in the aspect of degrading organic pollutants by photocatalysis.

Methods for manufacturing nanomaterial dispersions, such as nanomaterial concentrates, and related nanotechnology are provided. The nanomaterial concentrates provided can be more cheaply stored and transported compared to non-concentrate nanomaterial forms.

Uses for a composition comprising a polymer derived from at least two monomers: acrylic-x and an alkylamine, wherein said polymer is modified to contain a functional group capable of scavenging one or more compositions containing one or more metals are disclosed. These polymers have many uses in various mediums, including wastewater systems.

The disclosure relates to an electrode active material including: (a) first particulate of a metal (or metalloid) oxide alloyable with lithium; and (b) second particulate of an oxide containing lithium and the same metal (or metalloid) as that of the metal (or metalloid) oxide, and to a secondary battery including the electrode active material. When the electrode active material is used as an anode active material, reduced amounts of an irreversible phase such as a lithium oxide or a lithium metal oxide are produced during initial charge-discharge of a battery since lithium is already contained in the second particulate before the initial charge-discharge, and thus a dead volume on the side of the cathode can be minimized and a high-capacity battery can be fabricated.

The invention discloses a preparation method of stable lead-free all-inorganic double perovskite A2BB'X6 nanocrystals. The method adopts a thermal injection technology to synthesize the nanocrystals,and concretely comprises the following steps: mixing a metal precursor salt, a reaction solvent oleic acid, oleylamine, octadecene and other raw materials, carrying out vacuum heating and stirring ata certain temperature for a certain period of time, rising the temperature to a suitable reaction temperature under the protection of N2, rapidly injecting the obtained hot oleate solution of A into areaction system, and then rapidly cooling the system to room temperature by using ice bath to finally obtain the A2BB'X6 perovskite nanocrystals having a uniform size. The method has the advantages of simplicity, convenient, good reappearance and environmental protection, and the obtained product has the advantages of uniform size, good dispersion, high stability and excellent photocatalytic performance, and can be applied to the fields of photocatalysis, photodetectors, laser, solar cells and the like.

Provided is a visible active photocatalyst of formula BiOX wherein X=P or S and process of preparation and use thereof. Use of the catalyst is demonstrated in the photocatalytic degradation of pharmaceutical drug pollutants and pollutant dyes using solar radiation or artificial radiation.

A process for the recovery of one or more metal values from a metal ore material comprising those of one or more values and a matrix material having a sulfur content wherein the sulfur is present in an oxidation-reduction state of zero or less comprisinga. forming particulates from particles of said ore and an inoculate comprising bacteria capable of at least partially oxidizing the sulfur content;b. forming a heap of said particulates;c. biooxidizing the sulfur content andd. recovering those one or more metal values.

The invention relates to a process for recovering the transition metal component of catalysts used in the hydroconversion of heavy hydrocarbonaceous materials. In accordance with the invention, a slurry of a transition metal catalyst and hydrocarbon is catalytically desulfurized resulting in a desulfurized product and a solid residue containing the transition metal. The transition metal may be recovered by coking the residue and then dividing the coker residue into two portions are combusted with the flue dust from the first combustion zone being conducted to the second combustion zone. The flue dust from the second combustion zone is treated with ammonia and ammonium carbonate in order to obtain ammonium molybdate.

This invention relates to production process of pucherite yellow ceramic pigment, which takes sodium silicate as raw material to coat silicon dioxide. It takes sodium silicate as silicon source, coat silicon dioxide on surface of pucherite. For the strong inertia of silicon dioxide, it be able to withstand 1000 deg high temperature, and keep bright-colored after annealing of 1000 deg. This invention can eliminate harm to human body and pollution to environment in the process of production, solve the problem of heavy metal content are overproof in the export ceramic product of our country.