Extracted material for forward osmosis, preparation method thereof, and forward-osmosis water desalination system using the same

Patent metadata

Field	Value
Publication number	US-2021197123-A1
Application number	US-201916731435-A
Country	US
Kind code	A1
Filing date	Dec 31, 2019
Priority date	Dec 31, 2019
Publication date	Jul 1, 2021
Grant date	—

Abstract

An extracted material for forward osmosis is provided. The extracted material includes a first ionic compound, a second ionic compound and a third ionic compound, which are represented by formula {K[A + (R 1 )(R 2 )(R 3 )] p }(X − ) c (Y − ) d . X − is the same as Y − in the first ionic compound. X − is the same as Y − in the second ionic compound. X − in the first ionic compound is different from X − in the second ionic compound. X − differs from Y − in the third ionic compound. X − in the third ionic compound is the same as X − in the first ionic compound or X − in the second ionic compound. Y − in the third ionic compound is the same as Y − in the first ionic compound or Y − in the second ionic compound. A method for preparing an extracted material and a forward-osmosis water desalination system using the same are also provided.

First claim

1 - 22 . (canceled)

23 . An extracted material for forward osmosis, comprising:
a first ionic compound; a second ionic compound; and a third ionic compound, wherein the first ionic compound, the second ionic compound and the third ionic compound are represented by formula (I):
{K[A + (R 1 )(R 2 )(R 3 )] p }(X − ) c (Y − ) d   (I),

wherein R 1 , R 2 and R 3 independently comprise straight or branched C1-12 alkyl, A comprises phosphorus or nitrogen, K comprises C1-15 alkyl and both ends thereof are connected to [A + (R 1 )(R 2 )(R 3 )], p=2, c+d=2, and X − and Y − comprise CH 3 SO 3 − , I − , CF 3 COO − , SCN − , BF 4 − , CF 3 SO 3 − , PF 6 − , FeCl 4 − ,

wherein R 4 is —CH 2 COOH or —(CH 2 ) 4 —NH 2 , R 5 and R 6 are H or CH 3 , R 7 is —CH(CH 3 ) 2 , —(CH 2 ) 2 —CH(CH 3 ) 2 , —CH(CH 3 )—CH 2 —CH 3 or —CH 2 —C 6 H 5 , and R 8 is CH 3 or H,
wherein the group X − is the same as the group Y − in the first ionic compound, the group X − is the same as the group Y − in the second ionic compound, and the group X − in the first ionic compound is different from the group X − in the second ionic compound, and
the group X − differs from the group Y − in the third ionic compound, the group X − in the third ionic compound is the same as the group X − in the first ionic compound or the group X − in the second ionic compound, and the group Y − in the third ionic compound is the same as the group Y − in the first ionic compound or the group Y − in the second ionic compound.

24 . The extracted material for forward osmosis as claimed in claim 23 , wherein the first ionic compound and the second ionic compound comprise

25 . The extracted material for forward osmosis as claimed in claim 23 , wherein the third ionic compound comprises

26 . The extracted material for forward osmosis as claimed in claim 23 , further comprising a fourth ionic compound which is represented by formula (II):
[A + (R 1 )(R 2 )(R 3 )(R 4 )] n (X − ) a   (II),

wherein R 1 , R 2 , R 3 and R 4 independently comprise straight or branched C1-12 alkyl, A comprises phosphorus or nitrogen, n=1, a=1, and X − comprises CH 3 SO 3 − , I − , CF 3 COO − , SCN − , BF 4 − , CF 3 SO 3 − , PF 6 − , FeCl 4 − ,

wherein R 4 is —CH 2 COOH or —(CH 2 ) 4 —NH 2 , R 5 and R 6 are H or CH 3 , R 7 is —CH(CH 3 ) 2 , —(CH 2 ) 2 —CH(CH 3 ) 2 , —CH(CH 3 )—CH 2 —CH 3 or —CH 2 —C 6 H 5 , and R 8 is CH 3 or H.

27 . The extracted material for forward osmosis as claimed in claim 26 , wherein the fourth ionic compound comprises

28 . The extracted material for forward osmosis as claimed in claim 23 , further comprising a fifth ionic compound which is represented by formula (III):

wherein R 1 , R 2 , R 3 , R 4 and R 5 independently comprise straight or branched C1-12 alkyl, X − and Y − independently comprise organic or inorganic anions, and e+f=1.

29 . The extracted material for forward osmosis as claimed in claim 28 , wherein, in formula (III), X − and Y − comprise CH 3 SO 3 − , I − , CF 3 COO − , SCN − , BF 4 CF 3 SO 3 − , PF 6 − , FeCl 4 − ,

wherein R 4 is —CH 2 COOH or —(CH 2 ) 4 —NH 2 , R 5 and R 6 are H or CH 3 , R 7 is —CH(CH 3 ) 2 , —(CH 2 ) 2 —CH(CH 3 ) 2 , —CH(CH 3 )—CH 2 —CH 3 or —CH 2 —C 6 H 5 , and R 8 is CH 3 or H.

30 . The extracted material for forward osmosis as claimed in claim 23 , wherein the extracted material has a phase-transition temperature which is in a range from 20° C. to 50° C.

31 . A forward-osmosis water desalination system, comprising:
a feeding unit comprising a feeding end and a draw-solution end separated from the feeding end by a semi-permeable membrane, wherein the feeding end comprises raw water, and the draw-solution end comprises the extracted material as claimed in claim 23 ; a phase-separation unit connected to the feeding unit, the phase-separation unit comprising an aqueous layer and an ionic liquid layer, wherein the extracted material has a concentration in the ionic liquid layer which is greater than that in the aqueous layer; and a recovery unit connected to the phase-separation unit and filtering the aqueous layer to recover pure water.

32 . The forward-osmosis water desalination system as claimed in claim 31 , wherein the concentration of the extracted material is less than 10% in the aqueous layer in the phase-separation unit.

33 . The forward-osmosis water desalination system as claimed in claim 31 , wherein the concentration of the extracted material is in a range from 10% to 70% in the ionic liquid layer in the phase-separation unit.

34 . The forward-osmosis water desalination system as claimed in claim 31 , wherein the phase-separation unit has an operating temperature which is in a range from 20° C. to 50° C.

35 . The forward-osmosis water desalination system as claimed in claim 31 , wherein the recovery unit further comprises a thin film to filter the aqueous layer introduced from the phase-separation unit.

36 . A method for preparing an extracted material, comprising:
providing a first ionic compound and a second ionic compound, wherein the first ionic compound and the second ionic compound are represented by formula (I):
{K[A + (R 1 )(R 2 )(R 3 )] p }(X − ) c (Y − ) d   (I),

wherein R 1 , R 2 and R 3 independently comprise straight or branched C1-12 alkyl, A comprises phosphorus or nitrogen, K comprises C1-15 alkyl and both ends thereof are connected to [A + (R 1 )(R 2 )(R 3 )], p=2, c+d=2, and X − and Y − comprise CH 3 SO 3 − , I − , CF 3 COO − , SCN − , BF 4 − , CF 3 SO 3 − , PF 6 − , FeCl 4 − ,

wherein R 4 is —CH 2 COOH or —(CH 2 ) 4 —NH 2 , R 5 and R 6 are H or CH 3 , R 7 is —CH(CH 3 ) 2 , —(CH 2 ) 2 —CH(CH 3 ) 2 , —CH(CH 3 )—CH 2 —CH 3 or —CH 2 —C 6 H 5 , and R 8 is CH 3 or H,
wherein the group X − is the same as the group Y − in the first ionic compound, the group X − is the same as the group Y − in the second ionic compound, and the group X − in the first ionic compound is different from the group X − in the second ionic compound; and
blending the first ionic compound and the second ionic compound to prepare an extraction material, wherein the first ionic compound and the second ionic compound have a molar ratio which is in a range from 0.05:0.95 to 0.95:0.05.

37 . The method for preparing an extracted material as claimed in claim 36 , wherein the molar ratio of the first ionic compound to the second ionic compound is in a range from 0.15:0.85 to 0.85:0.15.

38 . The method for preparing an extracted material as claimed in claim 36 , further comprising blending a fourth ionic compound which is represented by formu

Assignees

• Ind Tech Res Inst

Inventors

• Chen Yi-Chun
• Liu Po-I
• Ho Chia-Hua
• Chen Yeu-Ding
• Wang David Chiuni
• Horng Ren-Yang
• Chen Kai-Chi

Classifications

• B01D61/0021

  comprising multiple forward osmosis steps · CPC title

• Y02A20/131

  Reverse-osmosis · CPC title

• C02F1/445

  by forward osmosis · CPC title

• B01D61/005 Primary

  Osmotic agents; Draw solutions · CPC title

• C02F2103/08

  Seawater, e.g. for desalination · CPC title