Abstract: To provide an antifouling layer-provided transparent substrate, which is excellent in antiglare and antifouling properties, especially in removability of a creamy product such as hand cream. An antifouling layer-provided transparent substrate, containing a transparent substrate and an antifouling layer provided as the top surface layer on one main surface of the transparent substrate, where the antifouling layer has a divalent group represented by —(OCF2)v(OCF2CF2)w— (where v and w are each independently an integer of at least 1), and the surface of the antifouling layer is such that the mean width RSm of the elements and the arithmetical mean roughness Ra satisfy RSm?Ra×100+5.

Abstract: The object of the present invention is to provide a fluorinated ether composition with which a surface layer capable of imparting excellent water/oil repellency to the surface of a substrate and being excellent in abrasion resistance and weather resistance of the water/oil repellency, can be formed, and a coating liquid containing the fluorinated ether composition. The present invention further provides an article having a surface layer formed of the fluorinated ether composition, and a method for producing it. A fluorinated ether composition containing a specific fluorinated ether compound (1) having a poly(oxyfluoroalkylene) chain and having two silyl groups each having a hydrolyzable group bonded, at one terminal of the chain via an amide bond, and a specific fluorinated ether compound (2) having a poly(oxyfluoroalkylene) chain and having two silyl groups having a hydrolyzable group bonded, at both terminals of the chain via an amid bond.

Abstract: The method of purifying 1224yd (Z) includes: distilling a composition comprising 1224yd (Z) and 244bb in a presence of an extracting solvent comprising at least one compound selected from the group consisting of an alcohol, an ether, a nitrile, a ketone, a carbonate ester, an amide, an ester, a sulfoxide, a hydrocarbon, a chlorohydrocarbon, and a fluorohydrocarbon; and thereby, separating at least a part of 244bb from the composition.

Abstract: The method of purifying 1224yd (Z) includes: distilling a composition comprising 1224yd (Z) and 244bb in a presence of an extracting solvent comprising at least one compound selected from the group consisting of an alcohol, an ether, a nitrile, a ketone, a carbonate ester, an amide, an ester, a sulfoxide, a hydrocarbon, a chlorohydrocarbon, and a fluorohydrocarbon; and thereby, separating at least a part of 244bb from the composition.

Abstract: There is provided an economically advantageous manufacturing method capable of efficiently obtaining 1-chloro-2,3,3,3-tetrafluoropropene by using 1,2-dichloro-2,3,3,3-tetrafluoropropane as a raw material. A manufacturing method of 1-chloro-2,3,3,3-tetrafluoropropene is characterized in that it includes subjecting 1,2-dichloro-2,3,3,3-tetrafluoropropane to a dehydrochlorination reaction in a liquid phase in a presence of a base.

Abstract: There is provided an economically advantageous manufacturing method capable of efficiently obtaining 1-chloro-2,3,3,3-tetrafluoropropene by using 1,2-dichloro-2,3,3,3-tetrafluoropropane as a raw material. A manufacturing method of 1-chloro-2,3,3,3-tetrafluoropropene is characterized in that it includes subjecting 1,2-dichloro-2,3,3,3-tetrafluoropropane to a dehydrochlorination reaction in a liquid phase in a presence of a base.