Mitsui Engineering and Shipbuilding Company Limited

Mitsui Petrochemical Industries, Ltd.

Takashi Arai

Toru Iwasaki

Masahiro Takahashi

Kiyoshi Horiguchi

Tetsuro Murayama

Shigeru Nagamori

Akira Tokinosu

Kenji Ogawa

Shinji Takahashi

Masafumi Aoba

Yuichi Katoh

Toshio Yamaki

Kouhei Takamoto

Hidenori Moriya

Toshio Kobayashi

Yasuhiro Niki

Nobutaka Oya

Provided is a process and an apparatus for producing at low cost gas hydrate pellets having an excellent storability. A gas hydrate generated from a raw-material gas and raw-material water is dewatered and simultaneously molded into pellets with compression-molding means under conditions suitable for generating the gas hydrate while the gas hydrate is generated from the raw-material gas and the raw-material water that exist among particles of the gas hydrate.

Process and apparatus for producing gas hydrate pellet

A gas hydrate production apparatus capable of reacting a raw gas with a raw water to thereby form a slurry gas hydrate and capable of removing water from the slurry gas hydrate by means of a gravitational dewatering unit. The gravitational dewatering unit is one including a cylindrical first tower body; a cylindrical dewatering part disposed on top of the first tower body; a water receiving part disposed outside the dewatering part; and a cylindrical second tower body disposed on top of the dewatering part, wherein the cross-sectional area of the second tower body is continuously or intermittently increased upward from the bottom.

Gas hydrate production apparatus

A gas hydrate slurry dewatering apparatus adapted to feed a raw as into a cylindrical main body of dewatering column so gas to attain pressuriation and so suction any gas from the interior of a drainage chamber disposed around the cylindrical main body so as to attain depressurization. An internal tube () as a constituent of a dewatering apparatus () in which the gas hydrate slurry (S) is introduced is provided with a separating section (). A drainage chamber () is formed by the internal tube () and, disposed with a given spacing therefrom, an external tube (). An exhaust blower (B) and a drainage pump (P) are connected to the drainage chamber (). A gas feed blower (B) for a raw gas (G) is connected to the internal tube (). A differential pressure detector (x) is provided for detecting any pressure difference between the interior of the internal tube () and the interior of the drainage chamber (). Control of the exhaust blower (B) and/or the gas feed blower (B) is performed by the signal from the differential pressure detector (x).

Method of dewatering gas hydrate and apparatus therefor

The invention provides a gas hydrate production apparatus which can eliminate the need for an agitator in a generator, and at the same time, can make constant the percentage of gas hydration of the product. A shell-and-tube-type generatoris provided downstream of an ejector-type mixerthat stirs and mixes a raw-material gas g and a raw-material water w. In addition, partition wallstoeach causing a gas hydrate slurry to turn around are provided in each of end platesandplaced respectively in the front and rear ends of the generator. Moreover, a dehydratorincluding a cone-shaped filteris provided downstream of the generator, and a drainage pipeis provided to the dehydrator. Further, a flow regulating valveis provided to the drainage pipe

A gas hydrate production apparatus capable of reacting a raw gas with a raw water to thereby form a slurry gas hydrate and capable of removing water from the slurry gas hydrate by means of a gravitational dewatering unit. This gravitational dewatering unit is one including a cylindrical first tower body; a cylindrical dewatering part disposed on top of the first tower body; a water receiving part disposed outside the dewatering part; and a cylindrical second tower body disposed on top of the dewatering part, wherein the cross-sectional area of the second tower body is continuously or intermittently increased upward from the bottom.

Gas hydrate production apparatus and dewatering unit

A reformed polypropylene resin composition having high degree of fluidity and excellent impact strength and rigidity, and further having a melt flow rate of from 50 to 150 g/10 min. and establishing a relationship between the melt flow rate (X) and the Izod impact strength (Y) which satisfies a relation Y.gtoreq.-4.7878 log X+13.8829. The reformed polypropylene resin composition is obtained by blending 0.01 to 0.2 parts by weight of an organic peroxide and 0.05 to 1 part by weight of a crosslinking agent per 100 parts by weight of a total of 50 to 90 parts by weight of a polypropylene having a melt flow rate at 230.degree. C. of 10 to 70 g/10 min, 0 to 25 parts by weight of an olefin copolymer rubber, and 5 to 40 parts by weight of an organic filler, and by melt-kneading the mixture by using a biaxial extruder maintaining a temperature of 120.degree. to 200.degree. in the preceding stage of the screw and a temperature of 180.degree. to 270.degree. C. in the succeeding stage, and setting the temperature in the succeeding stage to be higher than the temperature in the preceding stage.

Reformed polypropylene resin composition and a method of preparing the

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Ichihara, Japan

Takashi Arai