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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0108390 (2013-12-17) |
등록번호 | US-9605126 (2017-03-28) |
발명자 / 주소 |
|
출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 0 인용 특허 : 442 |
A process for recovering a concentrated sulfopolyester dispersion is provided comprising routing an aqueous dispersion comprising a water-dispersible sulfopolyester to a sulfopolyester concentration zone to remove water from the aqueous dispersion to produce the concentrated sulfopolyester dispersio
A process for recovering a concentrated sulfopolyester dispersion is provided comprising routing an aqueous dispersion comprising a water-dispersible sulfopolyester to a sulfopolyester concentration zone to remove water from the aqueous dispersion to produce the concentrated sulfopolyester dispersion and a recovered water stream; wherein the sulfopolyester concentration zone comprises at least one ultrafiltration membrane.
1. A process for recovering a concentrated sulfopolyester dispersion comprising routing an aqueous dispersion comprising a water-dispersible sulfopolyester to a sulfopolyester concentration zone to remove water from said aqueous dispersion to produce said concentrated sulfopolyester dispersion and a
1. A process for recovering a concentrated sulfopolyester dispersion comprising routing an aqueous dispersion comprising a water-dispersible sulfopolyester to a sulfopolyester concentration zone to remove water from said aqueous dispersion to produce said concentrated sulfopolyester dispersion and a recovered water stream; wherein said sulfopolyester concentration zone comprises at least one ultrafiltration membrane; wherein said ultrafiltration membrane comprises polysulphone and wherein said ultrafiltration membrane has a molecular weight cut-off of between about 20,000 to about 50,000 atomic mass units. 2. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein said sulfopolyester in said aqueous dispersion ranges from about 0.25 wt. % to about 25 wt. %. 3. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein said sulfopolyester in said aqueous dispersion ranges from about 0.5 wt. % to about 10 wt. %. 4. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein said aqueous dispersion is formed by washing an article comprising said water-dispersible sulfopolyester in water. 5. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein said sulfopolyester concentration zone comprises a cross flow filtration device. 6. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein the temperature of said aqueous dispersion ranges from about 10° C. to about 70° C. 7. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein said sulfopolyester concentration zone comprises at least one ultrafiltration membrane followed by at least one nanofiltration membrane. 8. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein said ultrafiltration membrane in said sulfopolyester concentration zone is contained in at least one spiral membrane cartridge. 9. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein the weight percent of sulfopolyester in said recovered water stream ranges from 0 to about 1 wt. %. 10. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 wherein said concentrated sulfopolyester dispersion has a sulfopolyester concentration of at least 2 times that of said aqueous dispersion. 11. The process for recovering a concentrated sulfopolyester dispersion according to claim 10 wherein said concentrated sulfopolyester dispersion has a sulfopolyester concentration of at least 5 times that of said aqueous dispersion. 12. The process for recovering a concentrated sulfopolyester dispersion according to claim 5 wherein said cross flow filtration device in the sulfopolyester concentration zone is operated in batch or continuous mode. 13. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 further comprising recycling at least a portion of said concentrated sulfopolyester dispersion to said sulfopolyester concentration zone to increase the water-dispersible sulfopolyester concentration of said concentrated sulfopolyester dispersion. 14. The process for recovering a concentrated sulfopolyester dispersion according to claim 1 further comprising recovering at least a portion of said sulfopolyester from said concentrated sulfopolyester dispersion to produce a recovered sulfopolyester polymer.
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