Manufacturing method for 1,1,1,3,3-pentafluoropropane

Abstract

A manufacturing method for 1,1,1,3,3-pentafluoropropane in which the method is composed of: step A wherein 2,3-dichloro-1,1,1,3,3-pentafluoropropane is reduced with hydrogen under the presence of hydrogenation catalyst in gaseous phase; step B wherein all of the products of the said step A are introduced into a cooler condenser, so that either a component of hydrogen and hydrogen chloride as non-condensation component and another compoment of 1,1,1,3,3-pentafluoropropane as condensation components or a component of hydrogen as non-condensation component and another component of hydrogen chloride and 1,1,1,3,3-pentafluoropropane as condensation component are obtained; step C wherein hydrogen is separated from the non-condensation component of the said step B, and it is recycled to the said step A; and step D wherein 1,1,1,3,3-pentafluoropropane is separated from the condensation component of the said step B. The producing method based on a manufacturing process of 1,1,1,3,3-pentafluoropropane can be provided with good efficiency and economy in industrial scales.

Dependencies are inferred from the claim text.