Abstract: In a gas phase olefin polymerization process using a fluidized bed vessel, an apparatus is employed having a device for measuring temperature or temperature distribution on the external wall surface of the vessel and a controlling means which predicts the progressive state of reaction inside the vessel, calculates the difference between the measured value and a target value determined beforehand and modifies polymerization conditions in relation thereto.

Abstract: In a gas phase olefin polymerization process using a fluidized bed vessel, an apparatus is employed having a device for measuring temperature or temperature distribution on the external wall surface of the vessel and a controlling means which predicts the progressive state of reaction inside the vessel, calculates the difference between the measured value and a target value determined beforehand and modifies polymerization conditions in relation thereto.

Abstract: In a gas phase olefin polymerization process using a fluidized bed vessel, an apparatus is employed having a device for measuring temperature or temperature distribution on the external wall surface of the vessel and a controlling means which predicts the progressive state of reaction inside the vessel, calculates the difference between the measured value and a target value determined beforehand an modifies polymerization conditions.

Abstract: In a side wall construction of a vehicle body, including an annular frame structure composed of a front pillar portion, a rear pillar portion, a roof side portion connecting upper ends of the front and rear pillar portions with one another, and a locker portion connecting lower ends of the front and rear pillar portions with one another, and a door adapted to selectively open or close the framed door opening, the door is longitudinally reinforced by a longitudinal reinforcement so that, when the front pillar portion is biased toward the rear pillar portion by a force longitudinal to the vehicle body, a larger part of the force is transmitted through the door than through the roof side portion.

Abstract: In a side wall construction of a vehicle body, including an annular frame structure composed of a front pillar portion, a rear pillar portion, a roof side portion connecting upper ends of the front and rear pillar portions with one another, and a locker portion connecting lower ends of the front and rear pillar portions with one another, and a door adapted to selectively open or close the framed door opening, the door is longitudinally reinforced by a longitudinal reinforcement so that, when the front pillar portion is biased toward the rear pillar portion by a force longitudinal to the vehicle body, a larger part of the force is transmitted through the door than through the roof side portion.

Abstract: A method of terminating a gas phase polymerization of an olefin to be conducted subsequent to producing a polyolefin by feeding a gaseous olefin into a fluidized bed reactor to polymerize the gaseous olefin while holding solid particles containing a catalyst in a fluid state, said method comprising introducing a deactivator in the fluidized bed reactor through at least two deactivator introduction ports of the fluidized bed reactor so as to terminate the gas phase polymerization. The height of the fluidized bed is generally at least 3 m. The deactivator is preferably introduced through deactivator introduction ports disposed at heights Ha=-0.3 D to 0.3 D (a) and Hb=0.3 D to 2.0 D (b) (D is the inside diameter of the fluidized bed reactor (cm)). After the termination of the polymerization, the gas phase polymerization can directly be resumed.