摘要:
PROBLEM TO BE SOLVED: To provide a method for stably producing an acetylene compound with good selectivity by isomerization of an allene compound at a good conversion rate, which can stably maintain catalytic activity even under a condition where carbon dioxide is present.SOLUTION: There is provided a method for producing an acetylene compound in which an allene compound in a mixture containing an allene compound and carbon dioxide is isomerized in the presence of a catalyst in which an alkali metal compound is supported on an alumina carrier, wherein 10-fold or more moles of a catalyst in terms of the alkali metal element contained in the catalyst is used with respect to the number of moles of the carbon dioxide supplied per hour.
摘要:
PROBLEM TO BE SOLVED: To provide a deodorization material having excellent versatility and having satisfactory resolution performance of deodorization components, and a deodorization device.SOLUTION: A deodorization material 100 is a cured material obtained by dissolving a photosensitization pigment into an unsaturated polyester resin composition comprising unsaturated polyester and monomers copolymerizable with unsaturated polyester and liquid at room temperature, adding a curing agent thereto and curing the same. The deodorization material 100 changes from a normal state to a single excited state, and further to a triplet excited state by being applied with light irradiation by a light irradiation device 40. This energy is given to oxygen molecules to generate single oxygen. Then, the odorous components are decomposed by the oxidation action of the generated single oxygen.
摘要:
Hollow metal nanoparticles and methods for their manufacture are disclosed. In one embodiment the metal nanoparticles have a continuous and nonporous shell with a hollow core which induces surface smoothening and lattice contraction of the shell. In a particular embodiment, the hollow nanoparticles have an external diameter of less than 20 nm, a wall thickness of between 1 nm and 3 nm or, alternatively, a wall thickness of between 4 and 12 atomic layers. In another embodiment, the hollow nanoparticles are fabricated by a process in which a sacrificial core is coated with an ultrathin shell layer that encapsulates the entire core. Removal of the core produces contraction of the shell about the hollow interior. In a particular embodiment the shell is formed by galvanic displacement of core surface atoms while remaining core removal is accomplished by dissolution in acid solution or in an electrolyte during potential cycling between upper and lower applied potentials.
摘要:
PROBLEM TO BE SOLVED: To provide a method capable of producing methylacetylene in good yield and to provide a catalyst suited for the production method.SOLUTION: A method for producing methylacetylene includes isomerizing propadiene in the presence of a catalyst of an alkali metal compound supported on γ-alumina having an average pore radius of 4.5 nm or more. The catalyst used for isomerizing propadiene to produce methylacetylene is a catalyst of an alkali metal compound supported on γ-alumina having an average pore radius of 4.5 nm or more.