35 results about "Group 12 element" patented technology

Methods for synthesizing luminescent nanoparticles and nanoparticles prepared by such methods are provided. The nanoparticles are prepared by a method in which an additive is included in the reaction mixture. The additive may be a Group 2 element, a Group 12 element, a Group 13 element, a Group 14 element, a Group 15 element, or a Group 16 element. In additions, a luminescent nanoparticle is provided that comprises a semiconductive core surrounded by an inorganic shell, an interfacial region and an additive present in the interfacial region or both the interfacial region and the shell.

A solid electrolyte material represented by Formula 1:

L_1+2x(M1)_1-x(M2)(M3)₄  Formula 1

• • wherein 0.25<x<1, L is at least one element selected from a Group 1 element, M1 is at least one element selected from a Group 2 element, a Group 3 element, a Group 12 element, and a Group 13 element, M2 is at least one element selected from a Group 5 element, a Group 14 element, and a Group 15 element, and M3 is at least one element selected from a Group 16 element, and wherein the solid electrolyte material has an I-4 crystal structure.

The invention relates to a preparation method for a core-shell structure nanocrystal, wherein a nanocrystal in the shape of a spot particle containing selenium compound is dissolved in a solvent added with an additive, then the oxygen contained in the solution is eliminated in an environment of inertia gas to obtain a solution 1, then sulfur and the precursor of 12th group of elements are respectively dissolved in solutions with the same solvent and mixed so as to obtain a solution 2, which is dripped into the solution 1, then the mixed solution is heated up to 120-280 DEG C to make the nanocrystal to grow, so as to obtain the core-shell structure nanocrystal with the nanocrystal containing the selenium compound as the core and with the sulfide as the shell; the additive is an organic amine or an organic acid, each of which contains the carbons not less than 10; and the solvent is a non-coordinate solvent with the boiling point no higher than 60 DEG C; and the molecular ratio between the sulfur and the 12th group of elements is 1:1-1.5. The invention is characterized in simplified procedures, easy operation, environment-friendly solvent, low cost which can be saved by more than 50percent, and great application value on both laboratorial and industrial synthesis.

A composite cathode active material including: a secondary particle including a plurality of primary particles including a lithium transition metal oxide having a layered crystal structure; and a coating layer disposed on a surface of the secondary particle and between the primary particles of the plurality of primary particles, wherein the coating layer includes a lithium cobalt composite oxide having a spinel crystal structure, and wherein the lithium cobalt composite oxide includes cobalt (Co) and a Group 2 element, a Group 12 element, a Group 13 element, or a combination thereof.

A process for preparing aromatic compounds from a liquid biofuel feedstock by introducing the feedstock into a hydroreforming stage in the presence of hydrogen and a hydroreforming catalyst that contains a transition metal of a group 3 to 12 element and an activated carbon, silicon carbide, silica, transition alumina, alumina-silica, zirconium oxide, cerium oxide, titanium oxide, or an aluminate of a transition metal substrate, to obtain a liquid effluent that contains an aqueous phase and an organic phase, a stage for hydrotreatment of the organic phase, a hydrocracking stage, recycling a fraction that boils higher than 160° C. in said hydrocracking stage, a separation into a fraction containing naphtha and a fraction that boils higher than 160° C., a stage for catalytic reforming of the fraction containing naphtha to obtain hydrogen and a reformate that contains aromatic compounds and a stage for separation of the aromatic compounds of the reformate.

In a process for producing a (meth)acrylic ester by esterifying (meth)acrylic acid and an alcohol in the presence of an acid catalyst, a purification step is conducted which comprises rectifying the reaction mixture in the presence of a heteroatom-containing chelate complex having as the central metal an element in Groups 7 to 12 of the Periodic Table in the longer form to thereby inhibit the (meth)acrylic ester from undergoing transesterification with the hydroxy compound which is a by-product present as an impurity and from yielding an alcohol. Thus, a high-purity (meth)acrylic ester can be produced.

The compounds represented by the formula (I) are produced by reacting benzene compound of the formula (IV) or (V) with alkenylidene diacetate of the formula (VI) in the presence of a catalyst comprising one or more members selected from (a) halogenated boron compounds, (b) triflate compounds of Group 11 elements, (c) halogenated compounds of Group 12 elements, and (d) triflate and halogenated compounds of tin and atomic numbers 58 and 66 to 71 elements. R<1>, R<2> = H or C1 - C10 alkyl group A = Substituted phenyl group corresponding to a compound of formula (IV) or (V), R<3>, R<4> = H or C1 - C4 alkyl group, m = 0 or 1 - 4, n = 1 to 5, k = 1 or 2.

A non-noble metal based catalyst includes a compound represented by Formula 1:

Zr_aM_bO_xN_y  [Formula 1]

where M is at least one element selected from Group 4 elements through Group 12 elements, a is a number in the range of about 1 to about 8, b is a number in the range of 1 to 8, x is a number in the range of about 0.2 to about 32, and y is a number in the range of about 0.2 to about 16. A fuel cell electrode and fuel cell may be formed using the non-noble metal based catalyst.

Provided is a polymerization catalyst composition that makes it possible to efficiently synthesize a polyisoprene having a high molecular weight. The isoprene polymerization catalyst composition is characterized by comprising: a rare earth element compound (component (a)) having a rare earth element-oxygen bond or a rare earth element-sulfur bond; an ionic compound (component (b)); and at least one compound (component (c)) selected from the group consisting of the compound that is represented by formula (X) and compounds comprising the repeating unit that is represented by formula (Y) (Formula (X): YR1 aR2 bR3 c. Formula (Y): (-Y(R1)O-). In the formulas, Y is a metal selected from among group 1, group 2, group 12, and group 13 elements of the period table, R1 and R2 are each a hydrocarbon group having a carbon number of 1-10 or a hydrogen atom, and R3 is a hydrocarbon group having a carbon number of 1-10. R1, R2, and R3 may be the same as or different from each other. When Y is a metal that is selected from among group 1 elements of the periodic table, a is 1 and b and c are 0. When Y is a metal that is selected from among group 2 and group 12 elements of the periodic table, a and b are 1 and c is 0. When Y is a metal that is selected from among group 13 elements of the periodic table, a, b, and c are 1.).