Patent ID: 9475744
Filing Date: 2016-10-25
CPC Classification: C07C,C08F

Claim Text:
1. A method for recovering a fluorine-containing ether, comprising the steps of: producing a wet fluoropolymer by suspension polymerization, solution polymerization, or bulk polymerization in the presence of at least a fluorine-containing ether represented by the formula (1): wherein Rf represents a C2-C6 fluoroalkyl group or a C2-C6 alkyl group, and R represents a C1-C4 fluoroalkyl group or a C1-C4 alkyl group, provided that the total number of carbon atoms in Rf and R is at most 8; vaporizing and discharging vaporizable substances including the fluorine-containing ether by heating the wet fluoropolymer in a container; and transferring the vaporizable substances in the vaporized state to a cooling means to cool the vaporizable substances, and wherein a value of x/V is at most 0.140, wherein V represents the inner volume (L) of the container, and x represents the discharge rate (kg/hour) of the vaporizable substances from the container.