Nippon Oil Company

Hiroo Takeda

Takeshi Kanda

Yutaka Oguchi

Masaaki Tsunemi

Michihiro Mohri

Naomasa Asano

Tadashi Uchiumi

A process for fluidized contact in a mixed phase by intimately contacting a liquid or a mixture of a liquid and a gas with solid particles in a contact vessel having a double pipe contact portion composed of an inner pipe contact portion and an outer pipe contact portion, and a packed bed provided to surround the upper part of the inner pipe, includes the steps of:

Process for fluidized contact in a mixed phase

A method for treating waste waters to remove oils and/or COD therefrom, which comprises accomodating solid porous packing pieces and activated carbon particles in a container, the porous packing pieces forming a stationary porous packed bed, the average pore diameter of the porous packing pieces being 1.5 to 8 times the average diameter of the activated carbon particles; introducing a waste water, if desired, together with an oxygen-containing gas and/or an oxidizing gas, from the bottom portion of the container to fluidize the activated carbon particles within the pores of the porous packing pieces and in spaces among the adjoining porous packing pieces and simultaneously to contact the waste water with the activated carbon particles; maintaining the upper level of the fluidized bed of the activated carbon particles at least 5 cm below the upper level of the porous packed bed; and withdrawing the waste water which has been so contacted from the top portion of the container.

Method for treating waste waters

A fluid consisting of either a liquid or a mixture of a liquid and a gas is intimately contacted with solid particles by introducing the fluid into a contacting vessel to form a fluidized layer of the solid particles. A bed of porous packing is also placed in the contacting vessel and the upper end of the fluidized layer of solid particles is located within the porous packed bed.

Growing community of inventors

Kawasaki, Japan

Hiroo Takeda