Sumitomo Chemical Company, Limited

Akatake Engineering Co.

Mitsuru Tamura

Tsutomu Konaka

Koji Takimiya

Yasuhiro Miura

Yoshio Iino

Ryuichi Sonoda

Hikaru Nagashima

Kozo Miyazaki

Yukio Fukada

Hiroshi Akimoto

A protecting tube is disposed inside the mixed phase container with one end fixed to the inside of the mixed phase container and the other end projecting freely into the mixed phase container . A detecting rod is inserted into the free end of said protecting tube and fixed to the protecting tube with a part of the detecting rod . Magnets are mounted in a uniform magnetic flux on the free end of the detecting rod and is movable about a point F of the detecting rod as a fulcrum. Agglomerates in the mixed phase container are detected by measuring magnetic flux fluctuations produced by movement of the magnets

Method and apparatus for detecting agglomerates

Agglomerates in a mixed phase container are detected by measuring strain in a detecting rod disposed in the mixed phase container in which a mixed phase of gas and powders is formed. The detecting rod is disposed at an insertion angle &thgr; in the range from 20 degrees to 70 degrees with relation to the flow of gas and powders.

Method and Apparatus for detecting agglomerates

A continuous powder catalyst supply apparatus and a catalyst supply system that is suitable for olefin gas phase polymerization. The supply apparatus comprises a catalyst storage chamber having a catalyst inlet port and a catalyst supply port for transmitting the catalyst to the reactor. Inside the catalyst storage chamber is a catalyst supply mechanism which substantially continuously supplies the catalyst to the catalyst supply port, and a forcible discharge mechanism which forcibly discharges the catalyst, supplied from the catalyst supply mechanism, through the catalyst supply port with a pressurized gas. The apparatus can be used to supply the catalyst to the reactor with low amounts of pressurized gas. Further, the system can be configured so as to avoid contamination of stored catalyst by reactant gas.

Continuous powder catalyst supply apparatus and catalyst supply system

A continuous process for producing polyethylene or copolymers of ethylene with other copolymerizable compounds at a pressure of at least 1,000 kg/cm.sup.2 in a tubular reactor under steady conditions without imposing on the polymerization system flow pulses, while keeping the monomer conversion at 35% or lower and the melt index of the polymer at 0.1 or more.

Process for producing ethylene polymers in tubular reactor

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Sodegaura, Japan

Mitsuru Tamura