Abstract: A method for manufacturing a gas filling container is provided. The method includes performing a treatment of bringing an amine compound into contact with the inner surface of a gas filling container having at least the inner surface made of stainless steel, manganese steel, carbon steel, or chromium molybdenum steel, and, after the treatment, a treatment of volatilizing off the amine compound from the gas filling container.

Abstract: The present disclosure provides a filter that includes a portion that comes into contact with a filtering object and is at least partially made of metal or metal compound, wherein the filter is capable of suppressing decomposition of fluorinated saturated hydrocarbon when filtering a composition containing high concentration of fluorinated saturated hydrocarbon. The filter according to the present disclosure includes: an area made of metal or metal compound for coming into contact with the filtering object; and amine compound absorbed to a surface of the area. A method for producing a filter according to the present disclosure includes a step of bringing amine compound into contact with the surface of the area made of metal or metal compound for coming into contact with the filtering object.

Abstract: The objective is to inhibit fluorinated saturated hydrocarbon decomposition during storage or use of a dry etching composition containing a fluorinated saturated hydrocarbon in high concentration. A dry etching composition contains 99 volume % or more of a fluorinated saturated hydrocarbon and further contains an amine compound. The dry etching composition is preferably an azeotropic composition or an azeotrope-like composition.

Abstract: The present invention is a gas filling container filled with a fluorinated hydrocarbon compound which is obtained by filling the fluorinated hydrocarbon compound represented by the formula: C4H9F or C5H11F within the gas filling container, a method for manufacturing a gas filling container, and a method for storing a fluorinated hydrocarbon compound. The fluorinated hydrocarbon compound in the gas filling container filled with a fluorinated hydrocarbon compound is kept from decomposing, and accordingly the purity of the filled fluorinated hydrocarbon compound does not decrease easily.

Abstract: The present invention is a method for purifying a fluorohydrocarbon compound comprising bringing a crude saturated fluorohydrocarbon compound having 4 or 5 carbon atoms into contact with a salt-type strongly acidic ion-exchange resin to remove water from the crude saturated fluorohydrocarbon compound. The present invention provides a method for purifying a fluorohydrocarbon compound that can sufficiently remove water from the fluorohydrocarbon compound without causing a decrease in the purity of the fluorohydrocarbon compound due to decomposition.

Abstract: The present invention is a method for purifying a fluorohydrocarbon compound comprising bringing a crude saturated fluorohydrocarbon compound having 4 or 5 carbon atoms into contact with a salt-type strongly acidic ion-exchange resin to remove water from the crude saturated fluorohydrocarbon compound. The present invention provides a method for purifying a fluorohydrocarbon compound that can sufficiently remove water from the fluorohydrocarbon compound without causing a decrease in the purity of the fluorohydrocarbon compound due to decomposition.