Hybrid TFC RO membranes with non-metallic additives
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-039/00
B01D-039/14
B01D-029/00
B01D-029/46
B01D-067/00
B01D-061/02
B01D-069/12
B01D-069/14
B01D-071/56
출원번호
US-0293744
(2011-11-10)
등록번호
US-8801935
(2014-08-12)
발명자
/ 주소
Koehler, Jeffrey Alan
Kurth, Christopher James
출원인 / 주소
NanoH2O, Inc.
대리인 / 주소
Fish & Richardson P.C.
인용정보
피인용 횟수 :
6인용 특허 :
136
초록▼
A process for preparing a reverse osmosis membrane that includes: (A) providing a polyamine, a polyfunctional acid halide, and a flux increasing additive having the formula Z+B− where Z+ is an easily dissociable cation and B− is a beta-diketonate; (B) combining the polyamine, polyfunctional acid hal
A process for preparing a reverse osmosis membrane that includes: (A) providing a polyamine, a polyfunctional acid halide, and a flux increasing additive having the formula Z+B− where Z+ is an easily dissociable cation and B− is a beta-diketonate; (B) combining the polyamine, polyfunctional acid halide, and flux increasing additive on the surface of a porous support membrane; and (C) interfacially polymerizing the polyamine and the polyfunctional acid halide, and flux increasing additive on the surface of the porous support membrane to form a reverse osmosis membrane comprising (i) the porous support membrane and (ii) a discrimination layer comprising a polyamide. The reverse osmosis membrane is characterized by a flux that is greater than the flux of the same membrane prepared in the absence of the flux increasing additive.
대표청구항▼
1. A process for preparing a reverse osmosis membrane, comprising: (A) providing a polyamine, a polyfunctional acid halide, and a flux increasing additive consisting of Z+B−, where Z+ is H+ or has the formula R1R2R3R4N+, where R1, R2, R3, and R4, independently, are H, a C1-C6 hydrocarbyl group, a be
1. A process for preparing a reverse osmosis membrane, comprising: (A) providing a polyamine, a polyfunctional acid halide, and a flux increasing additive consisting of Z+B−, where Z+ is H+ or has the formula R1R2R3R4N+, where R1, R2, R3, and R4, independently, are H, a C1-C6 hydrocarbyl group, a benzyl group, or a phenyl group, and B− is a beta-diketonate;(B) combining the polyamine, polyfunctional acid halide, and flux increasing additive on the surface of a porous support membrane; and(C) interfacially polymerizing the polyamine and the polyfunctional acid halide, in the presence of the flux increasing additive on the surface of the porous support membrane to form a reverse osmosis membrane comprising (i) the porous support membrane and (ii) a discrimination layer comprising a polyamide,wherein the reverse osmosis membrane is characterized by a flux that is greater than the flux of the same membrane prepared in the absence of the flux increasing additive. 2. A process according to claim 1, wherein the polyamine is selected from the group consisting of diaminobenzene, triaminobenzene, m-phenylene diamine, p-phenylene diamine, 1,3,5-diaminobenzoic acid, 2,4-diaminotoluene, 2,4-diaminoanisole, xylylene diamine, ethylenediamine, propylenediamine, piperazine, and tris(2-aminoethyl)amine. 3. A process according to claim 1, wherein the polyfunctional acid halide is selected from the group consisting of trimesoyl chloride, trimellitic acid chloride, isophthaloyl chloride, and terephthaloyl chloride. 4. A process according to claim 1, comprising combining the polyamine, polyfunctional acid halide, flux increasing additive, and nanoparticles; and interfacially polymerizing the polyamine and the polyfunctional acid halide on the surface of the porous support membrane to form a reverse osmosis membrane comprising (i) the porous support membrane and (ii) a discrimination layer comprising a polyamide and the nanoparticles. 5. A process according to claim 1, wherein the porous support membrane comprises nanoparticles. 6. A process according to claim 5, wherein the nanoparticles comprise carbon nanotubes. 7. A process according to claim 5, wherein the nanoparticles comprise zeolites. 8. A process according to claim 1, wherein R1, R2, R3, and R4 are ethyl groups. 9. A process according to claim 1, wherein each R1, R2, and R3 group is an ethyl group, and R4 is H. 10. A process according to claim 1, wherein B− has the formula: where X and Y, independently, are H, a C1-C6 hydrocarbyl group, a benzyl group, a phenyl group, —OR5, or NR6R7, each optionally substituted with fluorine, and R5, R6, and R7, independently, are H, a C1-C6 hydrocarbyl group, a benzyl group or a phenyl group. 11. A process according to claim 10, wherein X and Y are methyl groups. 12. A process according to claim 10, wherein X and Y are trifluoromethyl groups. 13. A process according to claim 1, comprising combining the polyamine, polyfunctional acid halide, flux increasing additive, and mono-hydrolyzed trimesoyl chloride; and interfacially polymerizing the polyamine and the polyfunctional acid halide on the surface of the porous support membrane to form a reverse osmosis membrane comprising (i) the porous support membrane and (ii) a discrimination layer comprising a polyamides. 14. A reverse osmosis membrane prepared according to the process of claim 1. 15. A reverse osmosis membrane according to claim 14, wherein the membrane is capable of exhibiting a flux of at least 30 gfd, determined by exposing the membrane to deionized water containing 32,000 ppm NaCl at a temperature of 25° C. and a pressure of 800 psi. 16. A reverse osmosis membrane according to claim 14, wherein the membrane is capable of exhibiting a salt rejection of at least 99.5%, determined by exposing the membrane to deionized water containing 32,000 ppm NaCl at a temperature of 25° C. and a pressure of 800 psi. 17. A method of purifying brackish water or seawater comprising contacting the brackish water or seawater with a reverse osmosis membrane according to claim 14.
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