Abstract: To provide a novel stabilization method for suppressing over-time denaturation of a high-purity ethylene carbonate-containing composition, a stabilized high-purity ethylene carbonate-containing composition, and the like. A method for stabilizing a high-purity ethylene carbonate-containing composition includes adjustment of content of the total of formic acid and a formic acid salt, or 2-chloroethanol to 500 ppm by mass or less in the high-purity ethylene carbonate-containing composition including 90% by mass or more ethylene carbonate.

Abstract: There is provided a power transmission device for a working vehicle, in which a drive takeoff shaft for front wheels can be easily mounted on or dismounted from a transmission case and hence the workability of assembly, maintenance, and the like can be improved but the cost of manufacturing the transmission case and the like can be easily reduced. In the power transmission device for a working vehicle provided with: an engine mounted on a running vehicle body having front wheels and rear wheels; a hydrostatic continuously variable transmission for variably transmitting power from the engine; and the transmission case for transmitting a transmission output from the hydrostatic continuously variable transmission, the drive takeoff shaft for front wheels for transmitting a driving force to the front wheels and the hydrostatic continuously variable transmission are arranged on a center plate disposed on the front side of the transmission case.

Abstract: There is provided a power transmission device for a working vehicle, in which a drive takeoff shaft for front wheels can be easily mounted on or dismounted from a transmission case and hence the workability of assembly, maintenance, and the like can be improved but the cost of manufacturing the transmission case and the like can be easily reduced. In the power transmission device for a working vehicle provided with: an engine mounted on a running vehicle body having front wheels and rear wheels; a hydrostatic continuously variable transmission for variably transmitting power from the engine; and the transmission case for transmitting a transmission output from the hydrostatic continuously variable transmission, the drive takeoff shaft for front wheels for transmitting a driving force to the front wheels and the hydrostatic continuously variable transmission are arranged on a center plate disposed on the front side of the transmission case.

Abstract: A screen bowl type centrifugal separator which can not only eliminate the problem of the productivity being lowered resulting from the occurrence of clogging with the crystals in the screen part, but also minimize the amount of leakage of the object to be treated in the screen part. Inside of the hub (41) of the screw conveyor (40), a cleaning liquid receiving part (43) which receives the cleaning liquid for the cleaning nozzle (45) is provided, and further, in the cleaning liquid receiving part (43), a residual layer crystal cleaning liquid receiving part (46) which receives the cleaning liquid for cleaning the residual layer object to be treated in the screen part (30) is provided, being partitioned independently of the inside of the cleaning liquid receiving part (43).

Abstract: A working machine lifting device of a tractor, comprising externally installed hydraulic lift cylinders disposed on the right and left sides of a transmission casing, lift arms rotated by the operation of the cylinders, and lower links vertically rotated by the rotation of the lift arms and connected to a working machine, wherein the cylinder and the lower link are rotatably supported on a same pin supported by the transmission casing and a sway chain bracket, and the support point of the cylinder and the vertical rotating pivot of the lower link are positioned on the axis of the pin.

Abstract: In order to provide a method for producing a high-purity aromatic dicarboxylic acid such as terephthalic acid with high energy efficiency using a simplified process, in the method for producing terephthalic acid according to the present invention, solid-liquid separation and cleaning steps are carried out using a single device, and in a step for removing any liquid adhered to terephthalic cakes by evaporation, internal energy stored in the terephthalic acid cakes and/or the liquid adhered thereto is used at least part of the energy for evaporating the liquid adhered to the cakes.

Abstract: A process for producing aromatic dicarboxylic acids which comprises subjecting an aromatic compound having an alkyl substituent or a partially oxidized alkyl substituent to liquid-phase oxidation with a molecular oxygen-containing gas in a reaction solvent in the presence of a catalyst, then conducting solid-liquid separation of the formed slurry containing crystals of the produced aromatic dicarboxylic acid, and recovering the crystals, wherein when carrying out solid-liquid separation of the slurry by continuously supplying it to a screen-type centrifugal separator having a screw conveyor disposed therein, a screen with an opening size that allows partial escape of crystals in the supplied slurry through the screen openings is used as the screen of the screen-type centrifugal separator. According to this method, clogging of the centrifugal separator is prevented and solid-liquid separation can be carried out efficiently.

Abstract: A working machine lifting device (1) of a tractor (100), comprising externally installed hydraulic lift cylinders (2, 2) disposed on the right and left sides of a transmission casing (4), lift arms (5, 5) rotated by the operation of the cylinders, and lower links (13) vertically rotated by the rotation of the lift arms and connected to a working machine (120), wherein the cylinder (2) and the lower link (13) are rotatably supported on a same pin (8) supported by the transmission casing (4) and a sway chain bracket (11), and the support point of the cylinder (2) and the vertical rotating pivot of the lower link (13) are positioned on the axis of the pin (8).

Abstract: An object of the invention is to provide a process of producing a compound for forming a slurry under pressure and/or heating, which is quite economical on an industrial scale such that a drying machine is not necessary and that it is possible to reduce energy to be used for drying.

Abstract: A process for preparing an aqueous slurry of terephthalic acid, which comprises oxidizing p-xylene with molecular oxygen in a liquid phase in an acetic acid solvent in the presence of a catalyst, to obtain an acetic acid slurry of terephthalic acid, separating terephthalic acid crystals from the acetic acid slurry, washing the terephthalic acid crystals containing acetic acid, with p-xylene or an acetic acid ester, and then mixing water thereto.