Abstract:
PROBLEM TO BE SOLVED: To provide a new polyesterimide containing a fluorenyl group and an ester group, having high transparency and high solubility, and useful for application to display materials, LED members, solar cell members, and so on, and to provide a precursor of the polyesterimide, a raw material thereof, and a method for producing them.SOLUTION: A PEI precursor which includes a tetracarboxylic dianhydride unit etc. having a fluorenyl group and an ester group and represented by general formula (1) and a unit of diamines; a PEI which is formed by cyclization of the precursor; and a method for producing them are disclosed (in formula, Rand Rare identical to, or different from each other, and each of them represents a 1-6C alkyl group or a 6-12C cycloaliphatic group or the like, and Xand Xare identical to, or different from each other, and each of them represents hydrogen, an alkyl group, an alkoxy group, a halogen group, or a nitrile group).
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for waste water disposal which very efficiently disposes of a large amount of waste water containing various kinds of organic matter discharged from actual operations.SOLUTION: The apparatus for waste water disposal includes a treatment tank 1 in which waste water containing organic matter is treated, an ozone oxidation means which turns the organic matter included in the waste water in the treatment tank 1 into carbonyl compounds on oxidation with ozone, a solid-liquid separation means which precipitates the carbonyl compounds obtained by the ozone oxidation means with metal ions, and an ultraviolet irradiation means 4 which promotes the ozone oxidation reaction in the ozone oxidation means on ultraviolet irradiation. In this method, an organic matter is not decomposed, but ozone-oxidized into carbonyl compounds which are separated from the liquid on precipitation by means of chelate reaction with metal ions. This method, therefore, results in a large reduction of ozone consumption and a significant shortening of the treatment time.
Abstract:
PROBLEM TO BE SOLVED: To provide a novel gemini surfactant in which the detergency is improved, a method of manufacturing the same, and a cleaning method.SOLUTION: The gemini surfactant has a chemical structure of formula (I). The method of manufacturing the same, and the cleaning method are disclosed. In the formula, X is a structure in which at least three alkylene glycol structure are connected together, Y denotes an 8C-16C hydrocarbon group, R and R' each independently denote a 1C-16C hydrocarbon group. In addition, Y, R and R' each may be the same or different mutually, and a benzoyl group may have at least one substituent, at two portions other than X.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for removing nitrogen in gas essentially composed of methane which removes nitrogen in a gas essentially composed of methane, and achieves the efficiency improvement of reliquefaction.SOLUTION: The method for removing nitrogen from gas essentially composed of methane is achieved by implementing: an adsorption stage of preparing three or more adsorption columns filled with adsorbent adsorbing and separating nitrogen and making the adsorbent adsorb nitrogen in a state where pressurizing is performed to prescribed adsorption pressure; a reproduction stage of desorbing nitrogen from the adsorbent in a state where pressure is more reduced than the above adsorption pressure so as to be reproduced; and a pressure recovery stage of reverting the adsorption column in the pressure-reduced state to the adsorption pressure in parallel by the respective adsorption columns. In the meantime, in the respective adsorption columns, the respective stages are implemented by being changed-over in succession. A recovery operation of introducing the gas discharged from the adsorption column in the pressure reduction step upon transfer from the adsorption stage to the reproduction stage, into the adsorption column in the pressure reverting stage, is implemented. In the recovery operation, a first step of recovering the gas of relatively high pressure after the adsorption and a second step of recovering the subsequent relatively low pressure gas thereafter are implemented.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing 6-bromo-N-methyl-2-naphthamide more economically and efficiently.SOLUTION: In this method for producing 6-bromo-N-methyl-2-naphthamide by mixing a first liquid containing 6-bromo-2-naphthoic acid chloride with a second liquid containing monomethylamine and a trapping agent of hydrogen chloride, the second liquid contains an amide-based solvent, and the amide-based solvent does not contain N, N-dimethylformamide. Preferably, the trapping agent of hydrogen chloride comprises alkaline aqueous solution, or water is further added to a liquid obtained by mixing the first liquid with the second liquid.