31 results about "Dinitrogen monoxide" patented technology

An object of the present invention is to provide a method for manufacturing a semiconductor device with high reliability, at low cost, in which an element forming layer having a thin film transistor and the like provided over a substrate is peeled from the substrate, so that a semiconductor device is manufactured. According to the invention, a metal film is formed over a substrate, a plasma treatment is performed to the metal film in a dinitrogen monoxide atmosphere to form a metal oxide film over the metal film, a first insulating film is formed continuously without being exposed to the air, an element forming layer is formed over the first insulating film, and the element forming layer is peeled from the substrate, so that a semiconductor device is manufactured.

A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and / or an olefin and at least one or more other olefin(s) under polymerization conditions with a metallocene catalyst and dinitrogen monoxide in amounts sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the production of polyolefins by introducing dinitrogen monoxide into the polymerization medium.

A process for preparing cyclododecanone by reacting cyclododecene with dinitrogen monoxide, comprising in particular steps (I) and (II):(I) preparing cyclododecene by partially hydrogenating cyclododecatriene;(II) reacting cyclododecene obtained in (I) with dinitrogen monoxide to obtain cyclododecanone.

A method for producing fullerenes, characterized in that said method includes a step (a) of contacting an aromatic compound-containing starting material with a supercritical fluid or a subcritical fluid at a temperature in a range of from 31 DEG C to 500 DEG C and at a pressure in a range of from 3.8 MPa to 60 MPa. Said supercritical fluid or said subcritical fluid is formed from one or more kinds of materials selected from the group consisting of an aromatic compound as said starting material, a solvent capable of dissolving said aromatic compound, water, dinitrogen monoxide, and ammonia.

A novel process for the polymerization of olefins is provided. The process involves contacting at least one olefin with a Ziegler-Natta catalyst in the presence of dinitrogen monoxide in the production of polymeric products having a narrower molecular weight distribution. A process for narrowing molecular weight distribution of polyolefins utilizing dinitrogen monoxide is also provided.

A method for decomposing dinitrogen monoxide including bringing a gas containing dinitrogen monoxide into contact with a fluid catalytic cracking (FCC) equilibrium catalyst.

A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and / or an olefin and at least one or more other olefin(s) under polymerization conditions with an olefin polymerization catalyst and dinitrogen monoxide in an amount sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the polymerization of an olefin by adding dinitrogen monoxide.

A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and / or an olefin and at least one or more other olefin(s) under polymerization conditions with a Ziegler-Natta catalyst and dinitrogen monoxide in an amount sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the polymerization of an olefin by adding dinitrogen monoxide.

The present invention relates to a process for preparing a cyclic ketone having from 7 to 16 carbon atoms, which comprises at least the steps(a) oxidation of a composition (I) comprising at least one cyclic alkene which has from 7 to 16 carbon atoms and at least one C—C double bond by means of dinitrogen monoxide to give a composition (A),(b) treatment of the composition (A) with at least one base to give a composition (B),(c) hydrogenation of the composition (B) in the presence of at least one catalyst to give a composition (C),(d) purification of the composition (C), comprising at least the steps(di) thermal treatment of the composition (C) with at least one acid or at least one catalyst comprising at least one transition metal,(dii) further purification by a method selected from the group consisting of distillation, extraction and crystallization.

Ketones of the formula IIwhere A is optionally alkyl-substituted C2-C12-alkanediyl, R1 and R2 are each, independently of one another, C1-C6-alkyl, or R1 and R2 together form optionally alkyl-substituted C3-C10-alkanediyl, and R3 is hydrogen or C1-C6-alkyl, are prepared by reacting a cyclic olefin of the formula Iwith dinitrogen monoxide to form the ketone of the formula II. The ketone of the formula II can be further hydrogenated to form the saturated ketone of the formula III.Macrocyclic ketones of the formula III, e.g. muscone, are sought after as fragrances.

A novel process for producing homopolymers and interpolymers of olefins which involves contacting an olefin and / or an olefin and at least one or more other olefin(s) under polymerization conditions with a Ziegler-Natta catalyst and dinitrogen monoxide in an amount sufficient to reduce the electrostatic charge in the polymerization medium. Also provided is a process for reducing electrostatic charge in the polymerization of an olefin by adding dinitrogen monoxide.

A novel process for the polymerization of olefins is provided. The process involves contacting at least one olefin with a Ziegler-Natta catalyst in the presence of dinitrogen monoxide in the production of polymeric products having a narrower molecular weight distribution. A process for narrowing molecular weight distribution of polyolefins utilizing dinitrogen monoxide is also provided.

The present invention relates to a process for preparing 4-pentenoic acid, at least comprising the oxidation of a mixture (G) comprising 4-pentenal, 3-methyl-2-butanone and cyclopentene oxide, and to the use of a mixture (G) comprising 4-pentenal, 3-methyl-2-butanone and cyclopentene oxide for preparing 4-pentenoic acid. In the context of the present invention, the mixture (G) is preferably obtained as a by-product of the oxidation of cyclopentene to cyclopentanone by means of dinitrogen monoxide.

The invention relates to a magnesium cobaltite catalyst, and a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydro-thermal synthesis of a carbon sphere and then impregnating the surface of the carbon sphere with a mixed aqueous solution of cobalt nitrate, magnesium nitrate and urea; carrying out rotary crystallization in a self-pressurization vessel equipped with a polytetrafluoroethylene inner container and carrying out hydro-thermal synthesis of cobalt-magnesium composite hydroxide on the surface of the carbon sphere; and carrying out roasting in the air to remove the carbon sphere so as to obtain the magnesium cobaltite catalyst. The magnesium cobaltite catalyst prepared in the invention has cavity morphology formed by porous wormlike nanoparticles; i.e., a plurality of cavities are formed by enclosure of the porous wormlike nanoparticles. The catalyst is used for catalytic decomposition of high-concentration nitrous oxide (N2O) exhaust gas and substantially improves the internal and external diffusion rates of reactants, so the activity of the catalyst is improved.

The invention discloses a method for preparing nitro compounds using nitrogen subvalent oxides. Nitrogen monoxide, nitrogen dioxide, dinitrogen monoxide, dinitrogen trioxide, dinitrogen tetroxide and other low-valent oxides of nitrogen are used, under the promotion of molecular oxygen, through aluminosilicate, silicon aluminum phosphate, phosphorus molybdenum Sodium acid and other heteropoly acid salts, transition metal oxides, triphenylphosphine metal-organic complexes, transition metal ion clay catalysts, and react with alicyclic compounds, aromatic compounds, and heterocyclic compounds to prepare nitro compounds. The method is used to replace the traditional industrial preparation method of nitrogen (V) compounds such as dinitrogen pentoxide, nitric acid, nitrate, and nitrate to prepare nitro compounds, and improves the atomic utilization rate of industrial nitration to prepare nitro compounds. Atom economic properties of nitro compounds.

A method is disclosed for obtaining dinitrogen monoxide by stepwise reduction of nitrates and / or nitrites from substances containing nitrate and / or nitrite, the reduction reaction being interrupted or limited after the step in which the dinitrogen monoxide is formed and the dinitrogen monoxide produced in the reduction reaction being separated, captured and / or collected.