Japan Pionics Co., Ltd.

Japan Pionics., Ltd.

Koichi Kitahara

Takashi Shimada

Noboru Akita

Kenji Ohtsuka

Keiichi Iwata

Noboru Takemasa

Masayuki Fujisawa

Yoshiki Matsumoto

Isao Nagatsu

Kohhei Sasaki

Tadashi Hiramoto

Shinobu Kamiyama

Kenji Otsuka

Toshiya Hatakeyama

Yasuhiko Koiso

Hideki Fukuda

Shigeo Ariki

Mamoru Takahashi

Miyoko Hiramoto

A cleaning agent for removing acidic gases which are harmful materials from a harmful gas containing such acidic gases, and a cleaning method using the cleaning agent are disclosed. The cleaning agent comprises a molded product of a composition comprising strontium hydroxide and an iron oxide, and the harmful gas is passed through a cleaning column packed with the cleaning agent to contact the harmful gas with the cleaning agent, thereby removing the acidic gases from the harmful gas.

Cleaning agent of harmful gas and cleaning method

A cooling agent which cools by an endothermic reaction resulting from the dissolving of crystals of inorganic salts water, the salts crystallizing at about room temperature by supplying heat. The cooling agent comprises a mixture of (i) a sodium phosphate salt, (ii) a sodium ammonium phosphate salt or an ammonium phosphate salt, and (iii) water. The cooling agent is produced in a manner which avoids the conglomeration of the crystals, which was a difficulty in the art. Moreover, the cooling agent of the present invention can be used repeatedly. When a nucleating agent, a highly water absorbent polymer or a thickener is added to the cooling agent, the precipitation of the crystals occurs in a still finer and stabler state. The cooling agent can be used in a cooling pillow having a desirable cooling property and a soft and agreeable touch, which offers comfort with safety and which is free from conglomeration of crystals, even after a long period of time.

Cooling agent

Highly purified rare gas (helium, neon, argon, krypton, xenon, etc.) is obtained by removing impurities contained therein, such as nitrogen, hydrocarbon, carbon monoxide, carbon dioxide, oxygen, hydrogen and water, at relatively low temperatures by the use of a getter. This getter is a two-component alloy of zirconium and vanadium, or a multi-component alloy containing, as well as zirconium and vanadium, at least one of chromium, nickel and cobalt.

Process for purification of rare gas

A refrigerant containing two or more constituent components that exhibit an endothermic action when mixed with each other, the refrigerant including, as the constituent components, an inorganic salt and a salt hydrate containing at least a hydrate of strontium hydroxide. The refrigerant has a superior cooling capability such as a low attainable cooling temperature and a long duration of the cooled state, and also has no fear of melting or deterioration even where the atmospheric temperature is increased during storage.

Refrigerant

A method for purifying a gaseous hydride, which comprises bringing a crude gaseous hydride into contact with at least one material selected from copper arsenides, copper phosphides, copper silicides, copper selenides, copper borides or copper sulfides to remove oxygen contained in the crude gaseous hydride.

Method for purifying gaseous hydrides

A method for cleaning an exhaust gas comprising a base gas and at least one toxic component selected from the group consisting of arsine, phosphine, diborane and hydrogen selenide is disclosed. The method comprises contacting the exhaust gas with a molded cleaning agent having a composition consisting essentially of (1) cupric oxide, (2) manganese dioxide, and (3) at least one metal oxide selected from the group consisting of silicon oxide, aluminum oxide and zinc oxide and having a density of from 0.6 to 1.5 g/ml, said composition having a metal atomic ratio M/(M+Cu+Mn) in the range of from 0.02 to 0.70 and a metal atomic ratio Cu/(Cu+Mn) in the range of from 0.1 to 0.9; wherein Cu represents a number of gram atom of copper; Mn represents a number of gram atom of manganese; and M represents a total number of gram atom of silicon, aluminum and/or zinc, to remove the toxic component from the exhaust gas. The method is effective even at low temperatures below 10.degree. C.

Method for cleaning exhaust gases

A method for purifying a gaseous hydride, which comprises bringing a crude gaseous hydride into contact with at least one material from nickel arsenides, nickel phosphides, nickel silicides, nickel selenides, or nickel borides to remove oxygen contained in the crude gaseous hydride.

A method for cleaning a gas containing at least one toxic component selected from the group consisting of arsine, phosphine, monosilane, diborane, and hydrogen selenide, which comprises contacting the gas with a cleaning agent containing a molded composition comprising (1) manganese dioxide and (2) cupric oxide, having deposited thereon (3) a silver compound, wherein the weight ratio of cupric oxide to manganese dioxide ranges from 0.2 to 1.2 and the amount of the deposited silver compound ranges from 0.01 to 10.5% by weight based on the cleaning agent. By the cleaning method, the toxic component can be removed from a gas, e.g., air, at high efficiency and at a high rate even in case of sudden leakage of the toxic component out of a bomb.

Method for cleaning gas containing toxic component

A method for cleaning an exhaust gas containing at least one toxic component selected from the group consisting of arsine, phosphine, diborane and hydrogen selenide is disclosed. The method comprises contacting the toxic component with a molded cleaning agent having a composition consisting essentially of (1) cupric oxide and (2) at least one metal oxide selected from the group consisting of silicon oxide, aluminum oxide and zinc oxide and having a density of from about 1.5 to about 3.5 g/ml, said composition having a metal atomic ratio M/(M+Cu) in the range of from about 0.02 to about 0.7 wherein Cu represents a number of gram atom of copper and M represents a total number of gram atom of silicon, aluminum and/or zinc, to remove the toxic component from the exhaust gas.

A solid detecting reagent for gaseous hydrides and a gaseous hydride detecting method are disclosed, said reagent comprising a basic copper carbonate as a color changing component and undergoing color change upon contact with at least one gaseous hydride selected from the group consisting of arsine, phosphine, diborane, hydrogen selenide, germane, monosilane, disilane and dichlorosilane. The reagent is applicable to all of these gaseous hydrides and, upon contact therewith, rapidly changes from an initial blue color to a black color, said black color standing for a long period of time.

Growing community of inventors

Kanagawa, Japan

Koichi Kitahara