发明名称 |
Ultrafiltration process for producing a sulfopolyester concentrate |
摘要 |
A process for recovering a primary polymer concentrate stream is provided. The process comprises routing a second mother liquor stream to a primary concentration zone to remove water from the second mother liquor stream to produce the primary polymer concentrate stream; wherein the primary concentration zone comprises at least one ultrafiltration membrane. A process is also provided to recover sulfopolyester from the primary polymer concentrate stream and to produce articles therefrom. |
申请公布号 |
US9598802(B2) |
申请公布日期 |
2017.03.21 |
申请号 |
US201314108389 |
申请日期 |
2013.12.17 |
申请人 |
Eastman Chemical Company |
发明人 |
Parker Kenny Randolph;Kirk Shane Kipley |
分类号 |
B01D12/00;D04H1/435 |
主分类号 |
B01D12/00 |
代理机构 |
|
代理人 |
Owen Polly C. |
主权项 |
1. A process for recovering a primary polymer concentrate stream, said process comprising:
(A) contacting cut multicomponent fibers having a length of less than 25 millimeters with a treated aqueous stream in a fiber slurry zone to produce a cut multicomponent fiber slurry; wherein said cut multicomponent fibers comprise at least one water dispersible sulfopolyester and at least one water non-dispersible synthetic polymer immiscible with said water dispersible sulfopolyester; and wherein said treated aqueous stream is at a temperature of less than 40° C.; (B) contacting said cut multicomponent fiber slurry with a heated aqueous stream in a mix zone to produce a heated multicomponent fiber slurry; (C) routing said heated multicomponent fiber slurry to a fiber opening zone to remove a portion of said water dispersible sulfopolyester to produce an opened microfiber slurry; (D) routing said opened microfiber slurry to a primary solid liquid separation zone to produce said microfiber product stream and a first mother liquor stream; wherein said first mother liquor stream comprises water and said water dispersible sulfopolyester; (E) routing at least a portion of said first mother liquor stream to a second solid liquid separation zone to produce a secondary wet cake stream and a second mother liquor stream; wherein said second mother liquor stream comprises water and water dispersible sulfopolyester; and wherein said secondary wet cake stream comprises microfiber; and (F) routing said second mother liquor stream to a primary concentration zone to remove water from said second mother liquor stream to produce said primary polymer concentrate stream; wherein said primary concentration zone comprises at least one ultrafiltration membrane. |
地址 |
Kingsport TN US |