Abstract: A method for recovering a polyoxoanion compound from an aqueous solution containing the polyoxoanion compound which comprises the following steps: Step (1): a step of mixing an organic solvent capable of forming a complex with the above-mentioned polyoxoanion compound with the above-mentioned aqueous solution followed by separating to a first phase containing the above-mentioned polyoxoanion compound and the above-mentioned organic solvent, and a second phase, Step (2): a step of mixing a hydrophobic organic solvent with the above-mentioned first phase followed by separating to an organic phase containing the above-mentioned organic solvent and the above-mentioned hydrophobic organic solvent, and an aqueous phase containing the above-mentioned polyoxoanion compound.

Abstract: A process for producing a carbonyl compound corresponding to an olefin, the process comprising reacting the olefin with molecular oxygen in a water-containing liquid phase comprising a palladium catalyst, a vanadium compound, and a heteropoly acid having a heteropoly anion represented by the Formula: [XaMbM?cOd]n? wherein X is any of elements selected from P, Si, and S; a represents an integer of 1 or 2; M and M? represent any of elements selected from Mo, W, V, Ta, and Nb; b and c represent an integer of 0 or more; d represents an integer of 1 or more; and n represents an integer of 1 or more.

Abstract: There are disclosed a method for producing a ketone compound, which comprises reacting an olefin compound with molecular oxygen and water in the presence of an effective amount of proton and a catalyst containing i) a chlorine-free palladium source, ii) a heteropoly acid or an acid salt of a heteropoly acid, and iii) a mesoporous silicate, and catalysts for the process.

Abstract: A process for producing a carbonyl compound, the process comprising reacting an olefin with molecular oxygen in the presence of a heteropoly anion, a palladium catalyst, and an iron compound, in an acetonitrile-containing aqueous solution, in the presence of an effective amount of a proton under a condition that an amount of an alkali metal in a reaction system is 1 or less g-atm per 1 mol of the heteropoly anion.

Abstract: A process for producing a carbonyl compound corresponding to an olefin, the process comprising reacting the olefin with molecular oxygen in a water-containing liquid phase comprising a palladium catalyst, a vanadium compound, and a heteropoly acid having a heteropoly anion represented by the Formula: [XaMbM?cOd]n? wherein X is any of elements selected from P, Si, and S; a represents an integer of 1 or 2; M and M? represent any of elements selected from Mo, W, V, Ta, and Nb; b and c represent an integer of 0 or more; d represents an integer of 1 or more; and n represents an integer of 1 or more.

Abstract: There are disclosed a method for producing a ketone compound, which comprises reacting an olefin compound with molecular oxygen and water in the presence of an effective amount of proton and a catalyst containing i) a chlorine-free palladium source, ii) a heteropoly acid or an acid salt of a heteropoly acid, and iii) a mesoporous silicate, and catalysts for the process.

Abstract: An angular rate sensor includes an oscillator having a pair of arm portions extending parallel to each other, a stem portion continuously formed to the arm portions, a driving member for oscillating the arm portions in directions opposite to each other, and a distortion detecting member for detecting a distortion of the arm portions in a distorted direction of the arm portions caused by a Coriolis force. The angular rate sensor further includes a correction driving member for driving the arm portions in the distorted direction of the arm portions, and a correction circuit for controlling the correction driving member to drive the arm portions in such a direction as to cancel a false distortion of the arm portions. The false distortion is detected by the distortion detecting member without the arm portions being subjected to the Coriolis force.

Abstract: An angular velocity sensor for precisely calculating an angular velocity by taking the mass balance of the transducer into account is provided. The sensor includes a tuning fork type transducer (23) having a pair of arm portions (22) at a shaft portion (21) and formed of a piezoelectric element, and a control circuit portion (24) that drives the transducer (23) and detects the angular velocity applied to the transducer (23). The control circuit portion (24) includes a correction circuit portion (35) that generates a correction signal to remove, as a noise component, a signal component of a sense signal (29) detected erroneously as if an angular velocity occurred when no angular velocity is occurring in the transducer (23), from signal components of the sense signal (29).

Abstract: An angular rate sensor includes an oscillator having a pair of arm portions extending parallel to each other, and a stem portion continuously formed to the arm portions, driving means for oscillating the arm portions in directions opposite to each other, and distortion detecting means for detecting a distortion of the arm potions in a distorted direction of the arm portions by a Coriolis force. The angular rate sensor further includes correction driving means for driving the arm portions in the distorted direction of the arm portions by the Coriolis force, and a correction circuit for controlling the correction driving means to drive the arm portions in such a direction as to cancel a false distortion of the arm portions, the false distortion being detected by the distortion detecting means without being subjected to the Coriolis force.

Abstract: An angular velocity sensor for precisely calculating an angular velocity by taking the mass balance of the transducer into account is provided. The sensor includes a tuning fork type transducer (23) having a pair of arm portions (22) at a shaft portion (21) and formed of a piezoelectric element, and a control circuit portion (24) that drives the transducer (23) and detects the angular velocity applied to the transducer (23). The control circuit portion (24) includes a correction circuit portion (35) that generates a correction signal to remove, as a noise component, a signal component of a sense signal (29) detected erroneously as if an angular velocity occurred when no angular velocity is occurring in the transducer (23), from signal components of the sense signal (29).

Abstract: A hot water supply system operated by linking plural water heaters. A system controller is provided in every specific number of water heaters for centralizing controls thereof. A host system controller is further provided in every specific number of the system controllers for centralizing controls thereof, and finally the controls are centralized in one highest system controller. In this configuration, therefore, the highest system controller controls the operation of individual water heaters by way of the lower system controllers.

Abstract: A hot water supply system operated by linking plural water heaters. A system controller is provided in every specific number of water heaters for centralizing controls thereof. A host system controller is further provided in every specific number of the system controllers for centralizing controls thereof, and finally the controls are centralized in one highest system controller. In this configuration, therefore, the highest system controller controls the operation of individual water heaters by way of the lower system controllers.

Abstract: In an angular velocity sensor device, a vibration isolation member, a sensor support plate on which a tuning fork unit functioning as a vibrating type angular velocity sensor is mounted, a collar, a circuit board on which a circuit pattern is formed for driving the tuning fork unit and processing a signal output therefrom are provided by having a plurality of pins inserted, in this order, which extend from the bottom surface of a concave-shaped case. The circuit pattern and the tuning fork unit are connected with each other via a flexible printed circuit board. These components are accommodated inside the concave-shaped case. A cover is fitted in an open top of the case so as to completely seal the case. The angular velocity sensor device with the aforementioned arrangement does not suffer variation in the operational properties due to disturbance vibration and deterioration in the vibration isolation property.