Asahi Glass Company, Limited

Agc Inc.

Maki Shigematsu

Masato Fukushima

Masaaki Tsuzaki

Hidekazu Okamoto

Satoshi Kawaguchi

Tsuyoshi Hanada

Yoshinobu Kadowaki

Yukio Tanaami

To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25&#xb0; C.

Method for storing tetrafluoropropene and container for storing tetrafluoropropene

To provide a method for purifying trifluoroethylene, by which from a fluid containing trifluoroethylene, a Calkane or alkene (excluding trifluoroethylene) in which at least one hydrogen atom may be substituted with a chlorine atom or a fluorine atom can be efficiently removed, and a method for producing trifluoroethylene by which trifluoroethylene can be efficiently produced. A fluid containing trifluoroethylene is brought into contact with at least one type of synthetic zeolite selected from synthetic zeolites 3A, 4A and 5A.

Method for purifying fluid that includes trifluoroethylene, and method for producing trifluoroethylene

To provide a method for storing trifluoroethylene filled in a container for storage, transportation, etc., stably without causing a reaction such as polymerization. The method is characterized in that trifluoroethylene is stored in a sealed container in such a state that a gas phase and a liquid phase coexist, and in the gas phase, the concentration of oxygen at a temperature of 25&#xb0; C. is kept to be at most 1,000 ppm by volume.

Storage method for trifluoroethylene, and storage container for trifluoroethylene

The present invention provides a method for cleaning and rinsing an article, with excellent cleaning and rinsing performance. The present invention provides a method for cleaning and rinsing an article, characterized by comprising a cleaning step of contacting an article having a contaminant attached, with a hydrocarbon solvent containing an aromatic hydrocarbon or a glycol ether, and a rinsing step of contacting it with a fluorinated ether, wherein the fluorinated ether is a compound represented by the formula 1:R&#x2014;O&#x2014;R&#x2003;&#x2003;Formula 1wherein each of Rand Rwhich are independent of each other, is a fluorinated alkyl group, wherein the number of fluorine atoms contained in each of Rand Ris at least one, and the total number of carbon atoms contained in Rand Ris from 4 to 8.

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Tokyo, Japan

Maki Shigematsu