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 |