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Multi-branch cationic phosphonium salt, forward osmosis extract containing it, and forward osmosis seawater desalination process

A cationic, phosphonium salt technology, used in osmotic/dialysis water/sewage treatment, seawater treatment, water treatment parameter control, etc., can solve the problems of difficulty in removing magnetic nanoparticles, high energy consumption, and difficult re-dispersion of magnetic particles.

Active Publication Date: 2021-04-20
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, by introducing carbon dioxide to increase the solubility or osmotic pressure of the extract, an additional process of heating to 60°C or higher to remove carbon dioxide is required when recovering the extract, thus requiring higher energy consumption
In addition, although it is reported that magnetic nanoparticles are used as the extraction solution, and the extraction solution is recycled through magnetic separation and recovery, in fact, the agglomerated magnetic particles are not easy to redisperse, and it is also difficult to remove the magnetic nanoparticles.

Method used

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  • Multi-branch cationic phosphonium salt, forward osmosis extract containing it, and forward osmosis seawater desalination process
  • Multi-branch cationic phosphonium salt, forward osmosis extract containing it, and forward osmosis seawater desalination process
  • Multi-branch cationic phosphonium salt, forward osmosis extract containing it, and forward osmosis seawater desalination process

Examples

Experimental program
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Effect test

preparation example 1

[0079] 1,8-Octanediyl-bis(tri-n-butylphosphonium)bis(p-toluenesulfonate)(P2-TOS)

[0080] First, synthesize 1,8-octanediyl-bis(tri-n-butylphosphonium) dibromide (1,8-octanediyl-bis(tri-n-butylphosphonium) dibromide) (hereinafter referred to as P2-Br):

[0081] (1) Take a 500mL round bottom bottle, put 80g (0.4mol) of tributylphosphine and 48.9g (0.18mol) of 1,8-dibromooctane (1,8-dibromooctane), and then add anhydrous Acetone 150mL was stirred at 40°C for 48 hours.

[0082] (2) After the reaction, slowly drop the above solution into 1.5L ether. The resulting white powder solid was filtered and washed several times with ether.

[0083] (3) The washed white solid was dried to obtain 117 g of the product P2-Br.

[0084] Next, 1,8-octanediyl-bis(tri-n-butylphosphonium)di(p-toluenesulfonate) was synthesized (hereinafter referred to as P2-TOS):

[0085] (1) Dissolve 2.67 g (3.7 mmol) of P2-Br and 1.57 g (8.1 mmol) of sodium p-toluenesulfonate (TOS-Na) in 13 g of deionized water...

preparation example 2

[0091] 1,8-Octanediyl-bis(tri-n-butylphosphonium)bis(2,4,6-trimethyl-benzenesulfonate)(P2-TMBS)

[0092] Synthesis of 1,8-octanediyl-bis(tri-n-butylphosphonium)bis(2,4,6-trimethyl-benzenesulfonate)(1,8-octanediyl-bis(tri-n-butylphosphonium) di(2,4,6-trimethyl-benzenesulfonate)) (hereinafter referred to as P2-TMBS):

[0093] (1) Dissolve 10g (14.7mmol) of P2-Br and 6.8g (29.6mmol) of 2,4,6-trimethylbenzenesulfonate (sodium2,4,6-trimethyl-benzenesulfonate) (TMBS-Na) in 40 g of deionized water, stirred at room temperature for 24 hours.

[0094] (2) After the reaction was completed, 20 mL of ethyl acetate was added for extraction.

[0095] (3) The organic layer was concentrated to obtain about 12.4 g of the product P2-TMBS.

[0096] The product P2-TMBS was determined via NMR ( 1 H-NMR, 400MHz, at D 2 O): 0.8(t,18H,CH 3 CH 2 -), 1.09(m,4H,-CH 2 -), 1.1~1.5(m,32H,-CH 2 -), 1.9~2.0(t,16H,PCH 2 -), 2.12(s,6H,Ar-CH 3 ), 2.25(s,12H,Ar-CH 3 ), 6.88 (s, 4H, ArH). The chemical...

preparation example 3

[0099] Trimethylolpropane tris[(tri-n-butylphosphonium)butyrate]tris(p-toluenesulfonate)(P3-TOS)

[0100] First, trimethylolpropanetris(4-bromobutyrate) is synthesized:

[0101] (1) Take a 50 mL round-bottomed reaction bottle, put 1 g (8.3 mmol) of trimethylolpropane (trimethylolpropane), dissolve it with 20 mL of anhydrous tetrahydrofuran (tetrahydrofuran; THF), then slowly add 1.1 g of NaH (60%), After stirring with a magnet at room temperature for 2 hours, 5 g (27 mmol) of 4-bromobutyryl chloride (4-bromobutyryl chloride) was added dropwise and reacted overnight at room temperature.

[0102] (2) Drain THF after the reaction is finished, add 20 mL of ether, filter the solution to remove solids, wash the obtained filtrate three times with 50 mL of water, and then drain the product to obtain 3.4 g of the product trimethylolpropane trimethylolpropane (4-Bromobutyrate).

[0103] Next, synthesize trimethylolpropane tris[(tri-n-butylphosphonium)butyrate]tribromide (trimethylolpr...

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Abstract

The present disclosure provides a multi-branch cationic phosphonium salt, which has a structure shown in formula (I): {Z[P + (R 1 )(R 2 )(R 3 )] n}(X ‑ ) n (I) where, R 1 , R 2 and R 3 Each independently is straight chain or branched C1~C10 alkyl, X ‑ It is an organic or inorganic anion, and Z has a structure shown in formula (IIb) or formula (IIc): wherein, a is an integer of 1 to 15, and in formula (IIb) and formula (IIc), Z is marked with an asterisk with [P + (R 1 )(R 2 )(R 3 )] connection, n is an integer of 3-4.

Description

【Technical field】 [0001] The disclosure relates to a multi-branch cationic phosphonium salt, a forward osmosis extract containing the same, and a forward osmosis seawater desalination process. 【Background technique】 [0002] With the increase of population, the rapid development of industry and the change of environment, the whole world is facing a serious shortage of fresh water resources. More and more countries have begun to develop seawater desalination technology to solve this global crisis. Currently, seawater desalination technologies commonly used in the world include Multi-Stageflash (MSF), low-temperature multi-effect distillation (Multi-effect distillation, MED) and reverse osmosis (Reverseosmosis, RO). There are common defects of high cost, high energy consumption, and low water production rate. [0003] In recent years, forward osmosis (Forward osmosis, FO) seawater desalination technology has received widespread attention. It utilizes the principle of forward ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/54C07C309/30C07C65/10C02F1/44C02F103/08
CPCC02F1/445C07C65/10C07C309/30C07F9/5407C02F2103/08C02F2209/03C07C53/18C02F2305/00C07F9/5449B01D61/005Y02A20/131C07C53/15C07C63/08
Inventor 陈意君徐美玉何雅惠陈凯琪
Owner IND TECH RES INST