Kyb Corporation

Asahi Kasei Chemicals Corporation

Teruhiko Inoue

Masanori Ogura

Keita Abe

Shinichi Sekine

Kenji Isshin

Mitsuo Konishi

Yasushi Saito

Masakazu Nakazato

Eiro Fujita

Yasuo Tsuyuki

Providing an overturn preventing device which can easily be mounted between a top surface of a piece of furniture and a ceiling while an axis line of a damper relative to a vertical direction is inclined at an angle ranging from 15&#xb0; to 25&#xb0;. The overturn preventing device includes a damper, a first base portion and a second base portion. The first base portion has a first abutting surface and a first connection. The first base portion is mounted on the top surface of the furniture. The second base portion has a second abutting surface and a second connection. The second base portion is mounted on the ceiling. A relation, X+L sin 15&#xb0;&#x2266;Y&#x2266;X+L sin 25&#xb0;, is obtained where reference symbol X designates a distance from the first abutting surface to the first connection, reference symbol L designates a length of the damper and reference symbol Y designates a distance from the second abutting surface the second connection.

Overturn preventing device and method of mounting the same

Providing an overturn preventing device which can successfully prevent overturn of an article. The overturn preventing device includes a damper mounted between a piece of furniture and a ceiling and a setting member connected to both ends of the damper. The setting member has a first setting part body and a second setting part body. The first and second setting part bodies and of the setting member are spread when the overturn preventing device is mounted between the furniture and the ceiling. The setting member assumes such a shape as to extend in one direction when the first and second setting part bodies and are unspread.

Overturn preventing device

According to the present invention, when cycloolefins are produced by partially hydrogenating a monocyclic aromatic hydrocarbon with hydrogen in the presence of a ruthenium catalyst, water, and a metal sulfate, the decrease in catalytic activity and cycloolefin selectivity is suppressed by reducing the concentration of chloride ions dissolved in the water in which the catalyst is present to 300 wt ppm or less and regenerating a part or all of the catalyst for reuse. Zinc sulfate is preferably used as the metal sulfate. Further, the raw materials and catalyst to be supplied to the reaction preferably have a reduced chloride ion content. This method can suppress the decrease in long-term catalytic activity and cycloolefin selectivity. Furthermore, the catalytic activity and cycloolefin selectivity after catalyst regeneration can be maintained at a high level. As a result, cycloolefins can be efficiently produced for a long period of time.

Process for production of cycloolefin

Growing community of inventors

Tokyo, Japan

Teruhiko Inoue