Abstract: An oil-water separation apparatus is provided which can easily separate and collect oil from a liquid mixture containing water and oil at low cost. The oil-water separation apparatus includes an oil-water-separating member configured to separate a liquid mixture containing water and oil into moisture and oil, and a liquid reservoir subdivided into an upper region and a lower region by the oil-water-separating member. The oil-water separation apparatus filters the liquid mixture by gravity. The oil-water-separating member includes a base which includes a channel for the liquid mixture. The oil-water-separating member is formed in the base, and the oil-water-separating member contains a fluorine compound which has an oil-repellency-imparting group and a hydrophilicity-imparting group. A drain port for discharging the moisture is formed in the lower region of the liquid reservoir.

Abstract: A surface coating material is provided for forming a hydrophilic oil repellent layer on at least a part of the surface of a substrate, and the surface coating material includes one or more fluorine-based compounds represented by the following formulas (1) to (4), a binder, and a solvent.

Abstract: The filter medium is a filter medium which uses a liquid containing oil and water as a separation target, and has a channel for the liquid. The filter medium includes a base constituting the channel, and one or more of nitrogen-containing fluorine compounds which are provided on at least a portion of a surface of the channel. The nitrogen-containing fluorine compound includes an oil-repellency imparting group and any one hydrophilicity imparting group selected from a group consisting of an anion type, a cation type, and an amphoteric type, in a molecule.

Abstract: The hydrophilic oil repellent includes one or more types of nitrogen-containing fluorine-based compounds. The nitrogen-containing fluorine-based compound includes any one hydrophilicity imparting group selected from the group consisting of anion type hydrophilicity imparting groups, cation type hydrophilicity imparting groups, and amphoteric type hydrophilicity imparting groups in the molecule.

Abstract: A novel fluorine-containing silane compound is provided. The fluorine-containing silane compound is capable of providing excellent water repellency and oil repellency, and is useful as a fluorine-containing silane coupling agent with applicability to a wide variety of applications, even if it has a chemical structure, which is free of a perfluoroalkyl group of 8 or more of carbon atoms; and has no risk of formation of PFOS or PFOA causing bioaccumulation potential and environment adaptability problems. A fluorine-containing silane compound containing at least one of each of a nitrogen-containing perfluoroalkyl group and an alkoxysilyl group in the molecule is selected.

Abstract: The filter medium is a filter medium which uses a liquid containing oil and water as a separation target, and has a channel for the liquid. The filter medium includes a base constituting the channel, and one or more of nitrogen-containing fluorine compounds which are provided on at least a portion of a surface of the channel. The nitrogen-containing fluorine compound includes an oil-repellency imparting group and any one hydrophilicity imparting group selected from a group consisting of an anion type, a cation type, and an amphoteric type, in a molecule.

Abstract: The hydrophilic oil repellent includes one or more types of nitrogen-containing fluorine-based compounds. The nitrogen-containing fluorine-based compound includes any one hydrophilicity imparting group selected from the group consisting of anion type hydrophilicity imparting groups, cation type hydrophilicity imparting groups, and amphoteric type hydrophilicity imparting groups in the molecule.

Abstract: A surface coating material is provided for forming a hydrophilic oil repellent layer on at least a part of the surface of a substrate, and the surface coating material includes one or more fluorine-based compounds represented by the following formulas (1) to (4), a binder, and a solvent.

Abstract: An oil-water separation apparatus is provided which can easily separate and collect oil from a liquid mixture containing water and oil at low cost. The oil-water separation apparatus includes an oil-water-separating member configured to separate a liquid mixture containing water and oil into moisture and oil, and a liquid reservoir subdivided into an upper region and a lower region by the oil-water-separating member. The oil-water separation apparatus filters the liquid mixture by gravity. The oil-water-separating member includes a base which includes a channel for the liquid mixture. The oil-water-separating member is formed in the base, and the oil-water-separating member contains a fluorine compound which has an oil-repellency-imparting group and a hydrophilicity-imparting group. A drain port for discharging the moisture is formed in the lower region of the liquid reservoir.

Abstract: A novel fluorine-containing silane compound is provided. The fluorine-containing silane compound is capable of providing excellent water repellency and oil repellency, and is useful as a fluorine-containing silane coupling agent with applicability to a wide variety of applications, even if it has a chemical structure, which is free of a perfluoroalkyl group of 8 or more of carbon atoms; and has no risk of formation of PFOS or PFOA causing bioaccumulation potential and environment adaptability problems. A fluorine-containing silane compound containing at least one of each of a nitrogen-containing perfluoroalkyl group and an alkoxysilyl group in the molecule is selected.

Abstract: A process for producing a perfluorobutanesulfonic acid salt (PFBS salt) is provided. By the process, the yield is improved and PFOS salt content is reduced. Electrochemical fluorination is conducted in a reaction solution comprising anhydrous hydrogen fluoride to generate perfluorobutanesulfonyl fluoride, and the fluoride is hydrolyzed to produce a perfluorobutanesulfonic acid salt. The process for producing a perfluorobutanesulfonic acid salt includes: a step in which liquid phase components generated in the electrochemical fluorination cell are withdrawn and a first a perfluorobutanesulfonic acid salt fraction is prepared therefrom; and a step in which gaseous phase components discharged from the electrochemical fluorination cell are collected and a second perfluorobutanesulfonic acid salt fraction is prepared therefrom.

Abstract: This method for producing a potassium perfluoroalkanesulfonate includes an electrochemical fluorination step in which an alkanesulfonyl halide compound is subjected to electrochemical fluorination in anhydrous hydrogen fluoride, thereby to generate a production gas containing perfluoroalkanesulfonyl fluoride as the main component. In addition, for example, the methods may include a gas absorption step in which the production gas is reacted with an aqueous solution of potassium hydroxide, thereby to generate a gas absorbed solution containing potassium perfluoroalkanesulfonate, a purification step in which impurities such as potassium fluoride, potassium hydroxide, and potassium sulfate, are removed, and a concentration and collection step in which the aqueous solution from which the impurities are removed is concentrated and dried.

Abstract: This method for producing a potassium perfluoroalkanesulfonate includes an electrochemical fluorination step in which an alkanesulfonyl halide compound is subjected to electrochemical fluorination in anhydrous hydrogen fluoride, thereby to generate a production gas containing perfluoroalkanesulfonyl fluoride as the main component. In addition, for example, the methods may include a gas absorption step in which the production gas is reacted with an aqueous solution of potassium hydroxide, thereby to generate a gas absorbed solution containing potassium perfluoroalkanesulfonate, a purification step in which impurities such as potassium fluoride, potassium hydroxide, and potassium sulfate, are removed, and a concentration and collection step in which the aqueous solution from which the impurities are removed is concentrated and dried.