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

A forward osmosis and chemical formula technology, applied in the direction of osmosis/dialysis water/sewage treatment, chemical instruments and methods, organic chemistry, etc., can solve the problems of reducing the operating cost of the forward osmosis system, affecting the quality of produced water, etc., and achieve the effect of low efficiency

Active Publication Date: 2021-07-16
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, generally the separated water layer solution still contains about 10-15% of the extract, which will not be c

Method used

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

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preparation example Construction

[0089] According to one embodiment of the present disclosure, there is provided a method for preparing an extraction material, comprising: providing a first ionic compound; providing a second ionic compound; and mixing the first ionic compound and the second ionic compound to prepare the extraction material . The molar ratio of the first ionic compound to the second ionic compound is 0.05:0.95-0.95:0.05. For example, it can be about 0.15:0.85-0.85:0.15, about 0.25:0.75-0.75:0.25, about 0.33:0.67-0.67:0.33, about 0.15:0.85, 0.20:0.80, about 0.3:0.7, about 0.4:0.6, about 0.5:0.5, about 0.6:0.4, about 0.7:0.3, about 0.85:0.15, etc., but not limited thereto. The above-mentioned first ionic compound and the above-mentioned second ionic compound have the following chemical formula (I).

[0090] {K[A + (R 1 )(R 2 )(R 3 )] p}(X - ) c (Y - ) d (I)

[0091] In formula (I), R 1 -R3 independently including straight or branched C 1-12 Alkyl, A includes phosphorus or nitrogen,...

Embodiment 1

[0118] Preparation of blended extract material

[0119] (1) Preparation of 1,8-octanediyl-bis(tri-n-butylphosphonium)bis(p-toluenesulfonate) (P2-TOS)

[0120] First, 1,8-octanediyl-bis(tri-n-butylphosphonium) dibromide (1,8-octanediyl-bis(tri-n-butylphosphonium) dibromide) (referred to as P2-Br) was synthesized according to the following steps:

[0121] Take a 500mL round bottom reaction flask, put 80g of tributylphosphine (0.4mol) and 48.9g of 1,8-dibromooctane (0.18mol), then add 150mL of acetone , stirred with a magnet at 40°C for 48 hours. After the reaction was over, the above solution was slowly dropped into 1.5L of ether. A white powder solid was obtained by filtration, and washed several times with diethyl ether. The washed white solid was dried under vacuum to obtain 117 g of the product P2-Br.

[0122] Next, the following steps were carried out to synthesize 1,8-octanediyl-bis(tri-n-butylphosphonium)bis(p-toluenesulfonate) (1,8-octanediyl-bis(tri-n-butylphosphoni...

Embodiment 2

[0132] Characterization Verification of Blended Extracted Materials

[0133] For P2-TOS, P2-TMBS, and different blending ratios of P2-TOS and P2-TMBS, the phase separation temperature test and osmotic pressure measurement were carried out respectively. The phase separation temperature test results are shown in Table 2. Table 2 compares the phase transition temperatures of P2-TOS, P2-TMBS, and extraction materials with different blending ratios of P2-TOS and P2-TMBS at different concentrations. The above materials are in a homogeneous phase at room temperature (25° C.), and phase separation begins to occur when the temperature is raised. The material P2-TOS is more hydrophilic than P2-TMBS, and requires a higher temperature to produce phase separation. For the extracted materials with different blending ratios of P2-TOS and P2-TMBS, the phase separation temperature presented is between P2-TOS and Between P2-TMBS, and with the decrease of P2-TOS mixing ratio, the phase separat...

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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+(R1)(R2)(R3)]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.

Description

【Technical field】 [0001] The present disclosure relates to an extraction material, in particular to a blended extraction material for forward osmosis. 【Background technique】 [0002] Forward osmosis (FO) desalination technology uses the osmotic pressure difference at both ends of the membrane as the driving force to attract water from the feed water end with low salinity (low osmotic pressure) to high salinity (high osmotic pressure) for extraction. At the drawsolution end, the extract solution diluted by membrane water is recovered, concentrated and produced pure water by various separation methods. [0003] The key to forward osmosis technology includes proper membrane, extraction solution, and separation method of extraction solution and pure water. In recent years, many manufacturers have used materials with temperature-sensitive properties as forward osmosis extracts to facilitate subsequent separations, such as those with the highest critical solution temperature (UCS...

Claims

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Application Information

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IPC IPC(8): B01D61/00C02F1/44
CPCB01D61/005C02F1/445C02F2103/08B01D61/002Y02A20/131C07C309/30
Inventor 陈意君刘柏逸何佳桦陈禹玎王钧逸洪仁阳陈凯琪
Owner IND TECH RES INST
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