Abstract: Realized is a solid substance concentration managing method which allows quick detection of an abnormality in a chemical reactor. The present invention is an invention of a solid substance concentration managing method of managing a concentration of a solid substance which is contained in a residue that is discharged in a reaction product gas processing step included in a trichlorosilane producing method, the solid substance concentration managing method including a concentration measuring step of measuring the concentration of the solid substance which is contained in an after-crystallization residue that is obtained by crystallizing part of aluminum chloride.

Abstract: Provided is a method of producing a quatenary alkyl ammonium hypochlorite solution with an excellent storage stability. Specifically, provided is a method of producing a quaternary alkyl ammonium hypochlorite solution, the method including: a preparation step in which a quaternary alkyl ammonium hydroxide solution is prepared and the concentration of amines in the quaternary alkyl ammonium hydroxide solution is set to 20 ppm by mass or less; and a reaction step in which the quaternary alkyl ammonium hydroxide solution is brought into contact with chlorine gas, wherein the concentration of carbon dioxide of a gas phase in the reaction step is 100 ppm by volume or less and the pH of a liquid phase in the reaction step is 10.5 or more.

Abstract: The present invention includes: a photochromic adhesive composition containing (A) a photochromic compound having, as a substituent, a molecular chain having a molecular weight of 300 or more, and (B) an adhesive urethane (urea) resin, and having a softening point of 140 to 220° C., and a photochromic laminate using the adhesive composition.

Abstract: The present invention relates to a urethane resin obtained by reacting a polymerizable composition containing at least a urethane prepolymer (B2) having an iso(thio)cyanate group at an end of a molecule thereof, which is obtained by reacting a bifunctional active hydrogen-containing compound (C1) having two groups having active hydrogen in a molecule thereof and a bifunctional iso(thio)cyanate group-containing compound (B1) having two iso(thio)cyanate groups in a molecule thereof, a polyrotaxane (A) having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, in which side chains having a group having active hydrogen are introduced into at least a part of the cyclic molecules, and a polyfunctional active hydrogen-containing compound (C2) other than the polyrotaxane (A) and having three or more groups having active hydrogen in a molecule thereof.

Abstract: A fluidized-bed reactor (1A) includes a reaction vessel (10A) configured to contain metallurgical grade silicon powder and a hydrogen chloride gas, and a portion of a side wall (w) which portion extends along at least 80% of a height extending from a gas feed opening (21), which is provided in a lower part of the reaction vessel (10A), to a top face of a fluid bed (40) has such a tapered shape that a cross section of the reaction vessel (10A) which cross section is taken perpendicular to a height direction of the reaction vessel (10A) increases in area in an upward direction.

Abstract: Provided is a method for producing polycrystalline silicon at a lighter environmental load and at low production cost. A method in accordance with the present invention for producing polycrystalline silicon includes: a silicon deposition step; a separation step; a hydrogen chloride removal step; a hydrogen refining step; an activated carbon regeneration step; and a circulation step.

Abstract: The invention is a polyrotaxane monomer (A) having a composite molecular structure composed of cyclic molecules and an axial molecule that skewer-like threads through the rings of the cyclic molecules and has a bulky group at both ends thereof so as not to dethread the rings, and the polyrotaxane monomer has a polymerizable functional group in the molecule and has a water content of 5000 ppm or less. According to the present invention, there can be provided a polyrotaxane monomer having a high productivity and capable of producing a high-quality material at a high yield, while maintaining excellent mechanical characteristics of the polyrotaxane monomer.

Abstract: An aluminum nitride particle including: a plurality of planes randomly arranged in a surface of the particle, the plurality of planes forming an obtuse ridge part or an obtuse valley part in the surface of the particle, the plurality of planes being observable in a scanning electron micrograph with 500 times magnification; wherein the particle has a longer diameter L of 20 to 200 ?m; a ratio L/D of the longer diameter L (unit: ?m) to a shorter diameter D (unit: ?m) of the particle is 1 to 1.25; and the plurality of planes comprise a first plane, wherein an area S (unit: ?m2) of the first plane satisfies S/L?1.0 ?m.

Abstract: A crushed polycrystalline silicon lump is provided in which a surface metal concentration is 15.0 pptw or less and preferably 7.0 to 13.0 pptw, and in the surface metal concentration, a surface tungsten concentration is 0.9 pptw or less and preferably 0.40 to 0.85 pptw, and a surface cobalt concentration is 0.3 pptw or less and preferably 0.04 to 0.08 pptw.

Abstract: The electrolysis vessel for alkaline water electrolysis includes an anode end unit, a cathode end unit, anode chamber cells, cathode chamber cells, and separating membranes. The anode/cathode end units each comprise a pressing frame, an insulating plate, and an end cell. The anode/cathode chamber cells are alternately arranged between the anode end unit and the cathode end unit. Electrolyte supply/recovery flow paths are arranged through each chamber cell. Electrolyte supply/recovery pipes each being a metal pipe, at least an inner surface of the metal pipe being coated with an insulating resin, are connected to the electrolyte supply/recovery flow paths respectively via through-holes arranged through the pressing frame(s) and the insulating plate(s).

Abstract: A teat opening protection patch is stuck to portions inclusive of the teat openings of livestock, and includes a laminate 1 of an elastic sheet 2 and an adhesive layer 3 laminated on one surface of the elastic sheet 2, the laminate 1 having a double-stretched tensile stress in a range of 0.1 to 5 N.

Abstract: Provided is a photochromic optical article obtained by bonding a pair of optical article plates to each other with an adhesive layer that contains (A) a photochromic compound and (B) a urethane resin, wherein (B) the urethane resin is obtained by polymerizing: (B1) a polyiso(thio)cyanate compound having two or more iso(thio)cyanate groups in a molecule; (B2) a poly(thi)ol compound having, in a molecule, two or more active hydrogen-containing groups selected from a hydroxyl group and a thiol group; and (B3) a mono(thi)ol compound having, in a molecule, one active hydrogen-containing group selected from a hydroxyl group and a thiol group. Also provided is a method for manufacturing the photochromic optical article.

Abstract: Provided is a method for analyzing a diene compound including: a triazolinedione adduct heating step of heating a triazolinedione adduct to produce a triazolinedione compound; an ene compound formation step of reacting the triazolinedione compound with a diene compound to obtain an ene compound; and an ene compound analysis step of analyzing the ene compound to quantitative determine the diene compound. Also provided is a method for producing an ene compound, including: a triazolinedione adduct heating step of heating a triazolinedione adduct to produce a triazolinedione compound; and an ene compound formation step of reacting the triazolinedione compound with a diene compound to obtain an ene compound.

Abstract: A single crystal silicon plate-shaped body as cut out from an upper portion of a straight body portion of a CZ method single crystal silicon ingot has an interstitial oxygen concentration in a crystal is 25 ppma to 45 ppma and a substitutional carbon concentration is 0.5 ppma or less in a radial center. In the radial center, oxygen precipitates are not observed in a bulk in an image of 200,000 times by a transmission electron microscope, and after heating the single crystal silicon plate-shaped body at 950° C. for 60 minutes, oxygen precipitates are observed in an image of the 200,000 times, and a shape of the oxygen precipitates is observed in a polyhedral structure in an image of 2,000,000 times.

Abstract: A metal powder having a BET specific surface area of 5 to 250 m2/g is obtained by contacting and mixing together a gas of a metal chloride (metal source gas) and a reducing gas (e.g., hydrogen gas) that have been separately heated so as to instantaneously form fine metal particles based on the gas phase reduction reaction thereof, and collecting the fine metal particles from the gas stream after the reaction.

Abstract: A method of protecting a teat opening with a teat opening protection patch, which is stuck to portions inclusive of the teat openings of livestock, and includes a laminate 1 of an elastic sheet 2 and an adhesive layer 3 laminated on one surface of the elastic sheet 2, the laminate 1 having a double-stretched tensile stress in a range of 0.1 to 5 N.

Abstract: Gypsum derived from waste gypsum boards is calcined and converted into gypsum granules including hemihydrate and/or anhydrous type III gypsum. The calcined gypsum granules are dropped into water to prepare a gypsum slurry. Then, dihydrate gypsum particles are crystalized in the slurry. The temperature of the gypsum granules just before being dropped into the water is 90° C. or higher.

Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.

Abstract: Provided is a fluidized bed reactor (1) that makes it possible to stably measure a temperature distribution in the fluidized bed reactor (1) while no damage is caused to a temperature measuring section. Provided is a fluidized bed reactor (1) configured to generate trichlorosilane by reacting metallurgical grade silicon powder and hydrogen chloride gas, the fluidized bed reactor (1) including: a reaction vessel (10); and a plurality of temperature measuring sections (50), provided on an outer surface of the reaction vessel (10), each for measuring a temperature inside the reaction vessel (10).

Abstract: A method of manufacturing polycrystalline silicon rod, wherein a reactor for manufacturing a polycrystalline silicon rod includes gas supply nozzles, and at least one nozzle is a flow rate amplification nozzle having a function that the amount of a silicon deposition raw material gas supplied to the nozzle can be increased.