The invention belongs to the field of catalysts, and particularly relates to a composite oxide containing tungstate nanoclusters, and a preparation method and application thereof. The tungstate nanocluster-containing composite oxide comprises an alkali metal element A, a tungsten element W, an auxiliary agent element M, and an oxygen element O, wherein the alkali metal element A, the tungsten element W and the auxiliary agent element M form a composite with the oxygen element O. The composite oxide as a cocatalyst can obviously improve the selectivity and the yield of C.sub.2 in the oxidative coupling of methane reaction with co-fed methane and oxygen.

Provided is a method for efficiently separating and recovering tungsten and other valuable(s) from at least one valuable containing tungsten. The present invention relates to a method for recovering at least one valuable containing tungsten, comprising subjecting a raw material mixture comprising at least one valuable containing tungsten to electrolysis using an electrolytic solution containing at least one alcohol amine to dissolve tungsten in the electrolytic solution, electrodeposit a part of the valuable(s) onto a cathode used for the electrolysis and separate at least one valuable other than the valuable(s) electrodeposited onto the cathode as a residue in the electrolytic solution, and then separating and recovering each of the residue and the valuable(s) electrodeposited onto the cathode.

This disclosure relates to porous carbon and a method of preparing the same. The porous carbon of the present invention is derived from a carbide compound having a composition comprising metal and oxide. The porous carbon of the present invention comprises both micropores and mesopores, and has large specific surface area, and thus, may be usefully used in various fields.

Provided is a novel polyoxometalate and a method for producing the polyoxometalate. The polyoxometalate is represented by the compositional formula: M.sub.xO.sub.y in which M is tungsten, molybdenum or vanadium; 4x1000; and 2.5y/x7.

A heat-insulating transparent PVC sheet is formed from a PVC substrate having a thickness of 0.02-2.0 mm and contains heat-insulation pastes evenly distributed over the PVC substrate, since the heat-insulation paste contains an essential component of wolfram cesium powder (WCs) with a chemical formula of Cs.sub.XN.sub.YWO.sub.3-ZCl.sub.C and having a particle size of 0.005-2 m, the heat-insulating transparent PVC sheet has an excellent weatherability, and particularly before and after tested in 300-hour service life in line with ASTM G-154 specification, has a physical property of weatherability decay rate (%) small than 4%.

A solid source material is described for forming a tungsten-containing film. The solid source material is tungsten hexacarbonyl, wherein content of molybdenum is less than 1000 ppm. Such solid source material may be formed by a process including provision of particulate tungsten hexacarbonyl raw material of particles of size less than 5 mm, wherein particles of size greater than 1.4 mm are less than 15% of the particles, and wherein content of molybdenum is less than 1000 ppm, and sintering the particulate tungsten hexacarbonyl raw material at temperature below 100 C. to produce the solid source material as a sintered solid.

A molecular film includes: a tungsten-oxygen octahedral block.

This invention concerns a tungsten-containing material, the application thereof and a preparation method thereof. Tungsten-containing materials can be used as electrochemical energy storage materials, fuel cell electrolytes and chemical catalyst materials. Tungsten-containing materials include tungsten oxide and tungsten oxide hydrate, doped tungsten oxides and doped tungsten oxide hydrates, tungsten oxide composites, and tungsten oxide hydrate composites.

The purpose/problem of the present invention is to provide a method for producing tungsten complex oxide particles useful as a heat shield material or the like that permits inexpensive production of a stable composition. This method for producing tungsten complex oxide particles includes a step for preparing a dispersion in which a raw material powder has been dispersed, a step for feeding the dispersion into a thermal plasma flame, and a step for supplying gas containing oxygen to the terminal portion of the thermal plasma flame and producing tungsten complex oxide particles. The dispersion preferably includes a carbon element.

A vehicle containing an nonaqueous electrolyte battery, the nonaqueous electrolyte battery including: a negative electrode containing a negative electrode active material; a positive electrode; and a nonaqueous electrolyte, where the negative electrode active material contains a composite oxide of formula:

Li.sub.x(Nb.sub.1-yTa.sub.y).sub.2-zTi.sub.1+0.5zM.sub.0.5zO.sub.7, where 0x5, 0y1, and 0.4z1, and M is at least one metal element selected from Mo and W.