Japan Petroleum Exploration Co., Ltd.

Jgc Corporation

Nitto Chemical Industry Co., Ltd.

Yoshiyuki Yamaguchi

Senichiro Kaku

Shoichi Kanda

Hiromitsu Shibuya

Kazuo Sato

Kazutoshi Chaki

Keietsu Kato

Takamasa Ohno

Tsuyoshi Nakagawa

Shogo Suzuki

Masami Murakami

A mercury removal apparatus for a liquid hydrocarbon includes a conversion device which converts a mercury component in a raw liquid hydrocarbon into elemental mercury to obtain a first liquid hydrocarbon containing the elemental mercury. The apparatus also includes a first stripping device which brings the first liquid hydrocarbon into counter-current contact with a first stripping gas, thereby transferring the elemental mercury in the first liquid hydrocarbon to the first stripping gas to obtain (i) a second liquid hydrocarbon in which the amount of the elemental mercury decreases and (ii) a first gaseous hydrocarbon containing the elemental mercury.

Mercury removal apparatus for liquid hydrocarbon

A top temperature Tof a distillation toweris held below a liquefying temperature of a light fraction by returning a part of an exhaust gas W, which is cooled by a condenser, to the upper zone of the distillation tower. A bottom temperature Tis raised up to 300&#xb0; C. at highest by returning a part of a liquid product P from a re-boiler 3 to a lower zone of the distillation tower. When a liquid hydrocarbon L comes in countercurrent contact with a stripping gas G inside the distillation towerwith the temperature profile that an inner temperature gradually falls down along an upward direction, mercury is efficiently transferred from the liquid L to a vapor phase without effusion of the light fraction in accompaniment with the exhaust gas W.

Mercury-removal process in distillation tower

The present invention provides a composition for recovery of petroleum and gas, which comprises (a) a copolymer having a molecular weight of 100,000 or more, composed of 30-75 mole % of N-vinylpyrrolidone unit, 5-70 mole % of (meth)acrylamide unit and 0-20 mole % of (meth)acrylic acid unit or a salt thereof, (b) a water-soluble aldehyde, (c) a phenol compound, and (d) water. This composition can form a gel in a required gelling time even at high temperatures and even in the presence of bivalent metal ions and accordingly can be used for efficient recovery of petroleum and gas.

Composition and method for recovery of petroleum and gas

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Tokyo, Japan

Yoshiyuki Yamaguchi