Mitsubishi Gas Chemical Company, Inc.

Sadao Otsuka

Toshio Komatsu

Akira Amemiya

Yoshio Yoshikawa

Takehiko Moriya

Akira Katada

An oxygen absorbent packet comprising an oxygen absorbent packaged and sealed in a double packaging material 6 comprised of a gas-permeable outer material layer 1 composed of a plastic film or transparent paper, a gas-permeable sealing layer 2, an inner material layer 3 composed of gas-permeable paper or nonwoven cloth, and a gas-permeable sealing layer 4, and also containing an air layer 5 between layers and 1 and 2 or between layers 2 and 3.

Oxygen absorbent packet

A process for treating a waste liquor from a hydrosulfite process by an activated sludge process is improved by aerating the waste in the presence of a metal ion before the activated sludge process.

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Nagareyama, Japan

Sadao Otsuka