Nippon Sanso Kabushiki Kaisha

Japan Oxygen, Co., Ltd.

Nihonsanso Kabushiki Kaisha

Hidetake Okada

Masato Kawai

Shunji Enomoto

Taisuke Suzuki

Satoshi Urata

Adsorptive separation process

The present invention relates to a steam reforming method of methanol for obtaining hydrogen gas and a system therefor. The present method and present system utilizes a heat transfer medium for regulating the temperature at each step of the process. By optimizing the flow so that the heat transfer medium circulate through the system as heat-exchanging with reactant at each step, temperature of the reactant is regulated at a desirable temperature for proceeding the reaction. Temperature of the decomposition process and the conversion process of methanol is independently regulated.

Method for steam reforming methanol and a system therefor

A nitrogen production method wherein air is compressed, is removed of water and carbon dioxide contained therein, and is simultaneously cooled to a temperature close to the liquefying point, and the resultant cleaned and cooled air is fed into a rectifying column for rectification so that high purity nitrogen is withdrawn from the rectifying column overhead; and wherein the oxygen-enriched liquid air withdrawn from the rectifying column bottom is expanded and fed into a condensation step wherein it becomes a source of reflux producing cold in the above-mentioned rectifying column, and then a cold is produced by adiabatically expanding the vaporized gas, after which heat exchange with raw air is performed. In this method, there is provided a closed circulating system wherein a circulating gas which is compressed is cooled by heat exchange with a return gas of the circulating gas, and the resultant cooled gas is fed into a reboiler at the bottom of the above-mentioned rectifying column wherein it vaporizes a liquid in the bottom of the rectifying column, and after the compressed circulating gas itself is liquefied through the above described step and expanded, it is fed into the above-mentioned condenser wherein it is vaporized by heat exchange with the high purify nitrogen from the above-mentioned rectifying column, and further the resultant vaporized gas is restored to normal temperature by heat exchange with the above-mentioned compressed circulating gas and is then subjected to recompression for continued circulation.

Nitrogen production method

A process for recovering argon in which a crude argon column is supplied with an argon feed gas containing a larger proportion of oxygen from a double rectifier and is cooled at its head portion with or without liquid air from a sump of the lower column of the double rectifier for producing a reflux of argon in the crude argon column. In the process, argon gas is compressed to a pressure sufficient for evaporating liquid oxygen fed from a condenser of the double rectifier, is then precooled in a heat exchanger, and thereafter liquefied by heat exchange with the liquid oxygen. Then the head portion of the crude argon column is cooled with the liquefied argon, which is then returned in a gaseous state for further compression to thereby circulate the argon gas.

Process for recovering argon

Growing community of inventors

Kawasaki, Japan

Hidetake Okada