69 results about "Zirconium atom" patented technology

A method for liquid phase oxidation of p-xylene with molecular oxygen to terephthalic acid that minimizes solvent loss through solvent burn and minimizes the formation of incomplete oxidation products such as 4-carboxybenzaldehyde (4-CBA). P-xylene is oxidized at a temperature in the range of 120° C. to 250° C. and in the presence of a source of molecular oxygen and a catalyst composition substantially free of zirconium atoms comprising a source of nickel (Ni) atoms, a source of manganese (Mn) atoms, and a source of bromine (Br) atoms, to form a crude reaction mixture comprising terephthalic acid and incompletely oxidized reaction products comprising 4-CBA, wherein the stoichiometric molar ratio of bromine atoms to manganese atoms is 1.5 or less, and the amount of nickel atoms is at least 500 ppm.

A metal compound represented by general formula (I):

wherein R¹, R², R³, and R⁴ each represent an alkyl group having 1 to 4 carbon atoms; A represents an alkanediyl group having 1 to 8 carbon atoms; M represents a lead atom, a titanium atom or a zirconium atom; n represents 2 when M is a lead atom or 4 when M is a titanium or zirconium atom. The metal compound has a low melting point and is therefore deliverable in a liquid state, has a high vapor pressure and is therefore easy to vaporize, and, when mixed with other metal compound, undergoes no denaturation due to a chemical reaction. The metal compound is suitable as a material of thin film formation processes involving vaporization of a metal compound, such as CVD.

A photocatalytic coating composition comprising a photocatalyst, a silicon alkoxide, a zirconium compound, colloidal silica, and a liquid medium, wherein a content of the zirconium compound in terms of zirconium atoms is 0.3 to 3 times by mole a content of the silicon alkoxide in terms of silicon atoms, which can form a coating film of a photocatalyst with a high adhesion strength to a substrate.

The present invention relates to a hydrocracking catalyst for hydrocarbon oil comprising a support containing a framework-substituted zeolite-1 in which zirconium atoms and/or hafnium atoms form a part of a framework of an ultrastable y-type zeolite and a hydrogenative metal component carried thereon and a method for producing the same. The hydrocracking catalyst of the present invention makes it easy to diffuse heavy hydrocarbon oils such as VGO, DAO and the like into mesopores, is improved in a cracking activity and makes it possible to obtain a middle distillate at a high yield as compared with catalysts prepared by using zeolite comprising titanium and/or zirconium carried thereon.

The invention discloses a composite oxide solid solution based on cerium oxide and zirconium oxide and preparation method, wherein the cerium/zirconium atom ratio is at least 1, the preparation method is as follows: first the cerium-containing rare-earth solution and the zirconium solution are mixed according to the proportion, and then organic acid is added according to chemical measurement for even mixing, and then a polymer monomer and initiator, simultaneously one or several surfactants are added, rapid stirring and emulsifying is performed to form water-in-oil emulsion. The emulsion is placed at a certain temperature and generates reaction for a length of time so as to be polymerized to form the gel, the gel is dried and roasted to obtain rare-earth-zirconium solid solution. The invention is a preparation method different with the prior technique, and has simple process, moreover the prepared composite oxide solid solution has larger specific surface area and higher oxygen storage amount.

The present invention provides a metallocene compound which produces an olefin polymer having a high molecular weight with a high stereoregularity. The metallocene compound has the following formula (1):

Q(C₅H_4-mR¹_m)(C₅H_4-nR²_n)MXY  (1)

• wherein (C₅H_4-mR¹_m) and (C₅H_4-nR²_n) each independently represent a cyclopentadienyl group;
• C₅H_4-m and C₅H_4-n each independently represent a cyclopentadienyl ring;
• m represents an integer of 1-3;
• n represents an integer of 2 or 3;
• R¹ and R² are each independently a substituent bonded respectively to C₅H_4-m and C₅H_4-n, and represent a hydrocarbon group of 1-20 carbon atoms, a silicon-containing hydrocarbon group of 1-20 carbon atoms or a heteroaromatic group;
• each R¹_m and each R²_n may be the same or different;
• one pair of R²'s in the R²_n are bonded to each other to form at least one ring;
• Q represents a divalent group for cross-linking (C₅H_4-mR¹_m) and (C₅H_4-nR²_n);
• M represents a titanium atom, a zirconium atom or a hafnium atom; and
• X and Y are the same or different and each a hydrogen atom, a halogen atom or a hydrocarbon group.

The present invention provides metallocene compounds which exhibit high polymerization activity for production of highly stereoregular polymers, as well as a production process for olefin polymers which employs olefin polymerization catalysts containing the compounds, and olefin polymers obtained by the production process. A metallocene compound of the present invention is represented by the following general formula (1):

YKLMX₂  (1)

wherein M represents a titanium atom, zirconium atom or hafnium atom; K and L are fused rings coordinated to M and each independently represents a fused ring of a cyclopentadienyl ring and a 5-membered ring, a fused ring of a cyclopentadienyl ring and a 6-membered ring or a fused ring of a cyclopentadienyl ring and a 7-membered ring; Y is a bridge group crosslinking K and L; and each X is bonded to M; and K and L have a 2-furyl group, substituted 2-furyl group, 2-thienyl group, substituted 2-thienyl group, 2-furfuryl group or substituted 2-furfuryl group on at least one position among each of the 2-positions, 4-positions and 5-positions.

The present invention provides a modified charge control agent composition exhibiting a high charge-imparting effect, and an electrostatic image developing toner containing such a charge control agent composition and having a high electrostatic charge amount and an environmental stability.

A composition comprising a metal compound (A) of aromatic hydroxycarboxylic acid having an aromatic hydroxycarboxylic acid bonded with a metal atom selected from a zirconium atom, a calcium atom, an aluminum atom, a chromium atom, a boron atom and a zinc atom via at least any of ionic bond, covalent bond and coordinate bond; and at least one inorganic pigment (B), wherein the pigment (B) is contained in an amount of from 1 to 20 parts by mass in 100 parts by mass of the composition.

The objective of the present invention is to provide a photosensitive resin composition which has high developability and provides a cured product that has excellent elastic modulus recovery characteristics and adhesion, and which enables the formation of a highly fine spacer. A photosensitive resin composition according to the present invention is characterized by containing (A) a hydrophilic resin, (B) a polyfunctional (meth)acrylate, (C) a photopolymerization initiator, (D) a solvent having an HLB of from 8.0 to 30.0 (inclusive) and (E) a compound which is a condensation product that has a compound represented by general formula (1) as an essential constituent monomer. (In formula (1), R1 represents one or more organic groups which are selected from the group consisting of a (meth)acryloyloxyalkyl group, a glycidoxyalkyl group, a mercaptoalkyl group and an aminoalkyl group, in each of which an alkyl group having 1-6 carbon atoms; R2 represents an aliphatic saturated hydrocarbon group having 1-12 carbon atoms or an aromatic hydrocarbon group having 6-12 carbon atoms; R3 represents an alkyl group having 1-4 carbon atoms; M represents one or more atoms selected from the group consisting of a silicon atom, a titanium atom and a zirconium atom; and m represents 0 or 1.)

The invention provides a novel metallocene catalyst and a green catalytic synthesis method of a polyarylate substituted 1,3-dicarbonyl compound developed by the catalyst. Zirconium atoms in the metallocene catalyst are connected with each other through two isopropyl-substituted cyclopentadienyl rings to display tetravalence; the zirconium atoms are coordinated with three hydrones; and the overall organic zirconium cationic part and the corresponding anions form an ion bond. The green synthesis method comprises the following steps: with a 1,3-dicarbonyl compound with active hydrogen as a reaction raw material, and aryl alcohol as an alkylation agent, carrying out intramolecular dehydration alkylation reaction under catalysis of perfluorooctane sulfonate isopropyl cyclopentadienyl zirconium; and obtaining a series of multiaryl-substituted 1,3-dicarbonyl compounds at a relatively low temperature and high yield. The method has the main advantages of being mild in reaction condition, simple to test and operate, high in yield and the like; the reaction is suitable for kinds of 1,3-dicarbonyl derivatives and different aryl alcohol; with perfluorooctane sulfonate isopropyl cyclopentadienyl zirconium as a catalyst, the catalyst can be recycled and used for a plurality of times; and meanwhile, the sole by-product is water, and has the advantages of being green, free of pollution and the like.

The invention belongs to the field of physical or chemical methods and provides a formula for synthesizing spherical nano-zirconia by using a detonation method in a grain diameter controllable manner and a synthetic method thereof. The method is characterized by comprising the following steps of: mixing and sensitively synthesizing zircon salt, ammonium nitrate and organic hydrocarbon compounds into paste with detonation property; and, after detonating the paste, carrying out drastic redox reaction among the ammonium nitrate as the oxidant, the zircon salt and the organic hydrocarbon compounds as the reducing agent, so that a high-temperature and high-pressure environment is formed, oxidizing zirconium atoms into zirconia, and crystallizing and gathering under the action of an inert cooling medium to form the spherical nano-zirconia. The method disclosed by the invention has the advantages that the yield of the spherical nano-zirconia is high; 20 g of spherical nano-zirconia can be obtained from 100 g of drug; the environmental pollution in the production process is low; the process is simple; the cost is low; the yield is easy to enlarge, so that industrial production is realized; the grain diameter of the spherical nano-zirconia is distributed in the range of 10-100 nm and is adjustable; and the appearance of the spherical nano-zirconia is a regular sphere.

The invention discloses a titanium carbide-zirconium carbide high-temperature solar selective absorbing coating and a preparation method thereof. The coating comprises a heat absorbing body substrate, an absorbing layer and an antireflection layer sequentially from the bottom layer to the surface. The material of the absorbing layer is a compound of titanium carbide and zirconium carbide, is prepared through double target co-sputtering and is 35-80 nm in thickness. The percentage of zirconium atoms in the compound is 0.5%-3%. The antireflection layer is aluminum oxide and 30-100 nm in thickness. The coating prepared through the preparation method is larger than or equal to 0.90% in absorptivity and smaller than or equal to 0.13 in emissivity under the condition of the atmospheric quality factor being AM 1.5. The coating has very good high-temperature stability and corrosion resistance. The coating provided by the invention has the characteristics of high absorptivity , low emissivity, good high-temperature stability and corrosion resistance and the like. According to the coating, the preparation process is simple, the source of raw materials is wide, the piece is low, operation is convenient, and control is easy. The coating has high practical value and wide application prospects in the fields of solar heat utilization and thermal power generation.

The invention discloses a method for improving the strength of a rare earth-iron-boron permanent magnet. The method comprises the following steps: preparing a sintered blank from a rare earth-iron-boron alloy sheet and a binary iron alloy sheet, carrying out high-temperature permeation treatment to obtain a blank magnet, and carrying out two-stage aging heat treatment to obtain the finished magnet. According to the method, the Nb element or the Zr element can enter the grain boundary phase of the surface layer of the magnet through diffusion and the mechanical strength of the magnet surface layer is improved; and niobium atoms or zirconium atoms basically do not enter the main phase of the magnet in the diffusion process, and the magnet still keeps relatively high magnetic performance so that the technical problem that the magnetic performance of the magnet is reduced in the existing method for enhancing the strength of the permanent magnet is solved.

A hard tissue repairing material includes zirconia as a base material. A surface of the base material has a hydrophilic group. The hydrophilic group is bonded to zirconium atom in the base material. The base material may contain at least an ionic component that is selected from a group consisting of calcium ion, sodium ion, potassium ion, and phosphate ions within the surface. A hard tissue repairing material may include zirconia as a base material and a layer of a main component of an apatite. The layer of the apatite may be formed on a hydrophilic group bonded to zirconium atom in the base material.

The invention pertains to a polymerizable composition comprising a cycloolefin monomer, a coupling agent (A) that has a cycloolefin structure, a coupling agent (B) that includes at least one compound represented by a formula (1) (provided that the coupling agent (B) excludes the coupling agent (A)), a filler, and a metathesis polymerization catalyst, a weight ratio (coupling agent (A)/coupling agent (B)) of the coupling agent (A) to the coupling agent (B) being 0.1 to 1.5,

(X)_n-m-M-(Y)_m  (1)

wherein M is a silicon atom, a titanium atom, an aluminum atom, or a zirconium atom, X is a hydrolyzable group, Y is a hydrocarbon group having 1 to 50 carbon atoms that is unsubstituted or substituted with a substituent that includes an oxygen atom, a nitrogen atom, a sulfur atom, a halogen atom, or a silicon atom, provided that at least one Y is a group having a solubility parameter value (SP value) of 7.5 to 10, m is an integer from 1 to 3, and n is a valence of M. A resin formed article that exhibits excellent heat resistance and impact resistance can be obtained by utilizing the polymerizable composition.

The invention provides a preparation method of a novel decamethyl zirconocene coordination compound and application thereof to a catalytic synthesis method of a secondary amide compound. The coordination compound is a cationic decamethyl zirconocene coordination compound, wherein a zirconium atom is coordinated with three water molecules, and the cationic part and the anionic part of the whole decamethyl zirconocene form an ionic bond. In the synthesis method of the secondary amide compound, the decamethyl zirconocene perfluorooctyl sulfonic acid coordination compound is used as a catalyst, acommon organic solvent is used as a reaction solvent, and a secondary amide substance is synthesized through four different routes, wherein the four different routes are specifically as follows: (1),carboxylic acid and amine are dehydrated to synthesize secondary amide; (2), a ritter reaction is performed on nitrile and secondary (tertiary) alcohol to synthesize the secondary amide; (3), primaryamide and secondary (tertiary) alcohol are dehydrated to synthesize the secondary amide; (4), the primary amide, aldehyde and 2-naphthol are dehydrated to synthesize the secondary amide; by the synthesis method, a novel low-cost environmentally friendly way is opened up for preparation of the secondary amide compound. The invention has the advantages as follows: the catalyst has high air stability, the selectivity and the yield of a target product are high, the catalyst can be reused, the product can be obtained through simple column chromatography separation, and the whole reaction and separation process is easy to operate and environmentally friendly.

Disclosed is a seamless aluminum can or can lid having an adhesion property and corrosion resistance, which is produced by providing a non-chrome conversion coating film on an aluminum alloy sheet and coating the surface of the resulting product with an organic resin layer. An organic-inorganic composite surface treating layer is provided on at least one surface of an aluminum alloy sheet, and anorganic resin coating layer is formed on the surface treating layer, wherein the surface coating layer comprises a zirconium compound in an amount of 2 to 20 mg/m2 in terms of a zirconium atom, a phosphorous compound in an amount of 1 to 10 mg/m2 in terms of a phosphorous atom and an organic compound in an amount of 5 to 60 mg/m2 in terms of a carbon atom.

A dental composition of the present invention includes: a polymerizable monomer component (A); and an amorphous filler (B) having an average particle size of 1 to 20 μm and including silica-based fine particles and coatings of an oxide that cover the surfaces of the silica-based fine particles. The oxide contains a zirconium atom, a silicon atom, and an oxygen atom. The dental composition contains 20 to 500 parts by weight of the filler (B) per 100 parts by weight of the polymerizable monomer component (A). The dental composition has a viscosity of 10 to 800 Pa·s. It is preferable that the filler (B) contain spherical particles, and that the percentage of the spherical particles in the filler (B) be at least 60%.