发明名称 Method for recovering fluorine-containing ether
摘要 An object of the present invention is to provide a method for recovering a fluorine-containing ether capable of recovering a fluorine-containing ether used for producing a fluoropolymer, in higher recovery yield and in a shorter time. The present invention relates to a method for recovering a fluorine-containing ether, including the steps of: producing a wet fluoropolymer by suspension polymerization, solution polymerization, or bulk polymerization in the presence of at least a specific fluorine-containing ether; 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.
申请公布号 US9475744(B2) 申请公布日期 2016.10.25
申请号 US201414654238 申请日期 2014.01.20
申请人 DAIKAN INDUSTRIES, LTD. 发明人 Zenke Yumi;Isaka Tadaharu;Fukagawa Ryouichi;Shimono Takeshi
分类号 C07C41/40;C08F14/20;C08F14/22;C08F14/18;C08F14/26;C08F14/28;C07C41/34;C08F6/00;C08F6/16;C08F6/24;C08F6/28;C08F214/26;C08F214/28 主分类号 C07C41/40
代理机构 Sughrue Mion, PLLC 代理人 Sughrue Mion, PLLC
主权项 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): Rf—O—R  (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.
地址 Osaka JP