Jgc Corporation

Sumitomo Metal Industries, Inc.

Fujikasui Engineering Co., Ltd.

Japan Com Company, Ltd.

Noboru Hashimoto

Koichi Ito

Osamu Matsumoto

Makio Kobayashi

Teizo Senjo

Setsuo Shibata

Hideo Fukuda

Shinichi Tokuda

Takeru Hamazaki

Mitsu Akatsu

Okitsugu Shinobu

An aqueous high concentration coal slurry having a high dispersion stability is produced by a process in which a coal material is wet pulverized at a low concentration in a dispersing agent-free aqueous medium, the resultant coal slurry is hydrated, the dehydrated coal cakes are mixed with an aqueous dispersing additive solution to provide an aqueous coal slurry (A), a portion (B) of the slurry (A) is further pulverized, and the pulverized portion (B) is mixed with the remaining portion (D) of the slurry (A), or by a process in which a coal material is pulverized in an aqueous dispersing agent solution to provide a slurry moiety (E), separately a cake moiety (E) is provided, the slurry moiety (E) is mixed with the cake moiety (E) the above-mentioned process being carried out to an extent such that the resultant coal slurry contains coal particles having a size of 5 .mu.m or less in a content of 15% by weight or more and coal particles having a size of 500 .mu.m or less at a particle size distribution in which a variation coefficient C in size of the coal particles is 0.3 to 0.75.

Process for producing an aqueous high concentration coal slurry

An improved water seal drum for gas comprising a vessel containing seal water, a gas introducing pipe extending downward from the upper part of the vessel, the lower end of the pipe opening beneath the water level, and a gas discharging pipe at the top of the vessel; characterized in that the gas introducing pipe is equipped with gas dispersing pipes having multiple nozzles for releasing the gas at a location above the lower end of the gas introducing pipe but beneath the water level. The drum enables stable water seaing of gas in a wide range of gas flow rates, and is particularly useful as a water seal drum for inflammable waste gases to be burned in a flare stack.

Water seal drum

Mixing of gases in a catalytic reactor having plural beds of packed catalyst which are disposed in series along the direction of the reactant gas flow is improved by providing a gas-mixing means in a space prepared between each bed, said means being composed of a separator plate mounted vertically on the rear face of a grating apparatus for supporting catalyst bed for partitioning the upper part of said space, a gas-distributor tube for providing a gas to-be-mixed with the aforesaid reactant gas and a gas-dispersing board located under said tube for establishing the complete gas mixing. The typical application of this invention will be found in the reactor for catalytic dehydrogenation of ethylbenzene to produce styrene.

Catalytic reactor

A liquid-gas contactor which comprises a first liquid-gas contacting region of which the lower part is provided with a gas inlet and the upper part is provided with a liquid feed inlet and a second region through which flows a gaseous fluid comprised of particles of at least a portion of the liquid fed into said first contacting region suspended in the greater part of the gas supplied through the gas inlet. The first and second regions are interconnected in the form of an inverted U-shape, the bottom ends of both regions opening into a liquid tank and at least the bottom end of the first liquid-gas contacting region being submerged in the liquid in the tank. A liquid-gas contact process employs this contactor.

Liquid-gas contactor and liquid-gas contact process

Disclosed is a wet process for efficiently and economically removing a specific gas component and/or solid component from a gas containing the same wherein the gas is countercurrently contacted with a scrubbing liquid in a perforated or grid plate column without weir and downcomer and having a free-space ratio of 0.30 to 0.60 under the conditions of a superficial gas velocity of from 1.5 to 8 m/sec and a liquid flow rate of from more than 110,000 to 250,000 kg/m.sup.2 .multidot. hr.

Wet process for removing specific component from gas

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Yokohama, Japan

Noboru Hashimoto