Ion liquid modified cellulose-based adsorbent as well as preparation method and application thereof

A cellulose-based, ionic liquid technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. Low toxicity, safe reaction process, and the effect of improving yield

Active Publication Date: 2018-08-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides an ionic liquid modified cellulose-based adsorbent and its preparation method and application. The adsorbent can effectively solve the problem of low adsorption capacity of cellulose in the water phase and existing The modification technology modifies the problem that the functional groups of cellulose have a single effect on dyes. The adsorbent is degradable, which is beneficial to the sustainable development of the environment, and can be widely used in the treatment of printing and dyeing wastewater; its preparation method is simple, the reaction conditions are mild, and the reactants are toxic. Small, wide source of raw materials

Method used

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  • Ion liquid modified cellulose-based adsorbent as well as preparation method and application thereof
  • Ion liquid modified cellulose-based adsorbent as well as preparation method and application thereof
  • Ion liquid modified cellulose-based adsorbent as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0030] A preparation method of ionic liquid modified cellulose-based adsorbent, comprising the following steps:

[0031] 1) Accurately weigh 2g of absolute dry cellulose (handmade cotton pulp paper), add it together with 17.6g of 2-bromopropionic acid, 0.14g of p-toluenesulfonic acid, and 80mL of toluene into a 100mL container (such as a single-necked flask), and put Insert the magnetic rotor, connect the water separator, add 3 / 4 toluene to the side pipe of the water separator, and connect the condenser pipe;

[0032] 2) Place the container in an oil bath at 130°C and heat it at a constant temperature. After condensing and refluxing for 10 hours, open the side pipe piston of the water separator, slowly release the toluene-water mixture in the side pipe, and gradually evaporate the toluene in the container to obtain fiber The crude product of 2-bromopropionate;

[0033] 3) Rinse the crude cellulose 2-bromopropionate with ethanol and 5% sodium bicarbonate aqueous solution for s...

Embodiment 2

[0038] A preparation method of ionic liquid modified cellulose-based adsorbent, comprising the following steps:

[0039] 1) Accurately weigh 2g of absolute dry cellulose (handmade cotton pulp paper), add it together with 17.6g of 2-bromopropionic acid, 0.14g of p-toluenesulfonic acid, and 80mL of toluene into a 100mL container (such as a single-necked flask), and put Insert the magnetic rotor, connect the water separator, add 3 / 4 toluene to the side pipe of the water separator, and connect the condenser pipe;

[0040] 2) Place the container in an oil bath at 110°C and heat it at a constant temperature. After condensing and refluxing for 10 hours, open the side pipe piston of the water separator, slowly release the toluene-water mixture in the side pipe, and gradually evaporate the toluene in the container to obtain fiber The crude product of 2-bromopropionate;

[0041] 3) Rinse the crude cellulose 2-bromopropionate with ethanol and 5% sodium bicarbonate aqueous solution for s...

Embodiment 3

[0045] A preparation method of ionic liquid modified cellulose-based adsorbent, comprising the following steps:

[0046] 1) Accurately weigh 2g of absolute dry cellulose (handmade cotton pulp paper), add it together with 17.6g of 2-bromopropionic acid, 0.14g of p-toluenesulfonic acid, and 80mL of toluene into a 100mL container (such as a single-necked flask), and put Insert the magnetic rotor, connect the water separator, add 3 / 4 toluene to the side pipe of the water separator, and connect the condenser pipe;

[0047] 2) Place the container in an oil bath at 130°C and heat it at a constant temperature. After condensing and refluxing for 7 hours, open the side pipe piston of the water separator, slowly release the toluene-water mixture in the side pipe, and gradually evaporate the toluene in the container to obtain fiber The crude product of 2-bromopropionate;

[0048] 3) Rinse the crude cellulose 2-bromopropionate with ethanol and 5% sodium bicarbonate aqueous solution for seve...

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PUM

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Abstract

The invention discloses an ion liquid modified cellulose-based adsorbent as well as a preparation method and application thereof, and relates to the technical field of dye adsorption. The adsorbent can be degraded; the environment sustainable development is facilitated; the adsorbent can be widely applied to the printing and dying waste water treatment. The preparation method comprises the following steps of S1, adding cellulose, 2-bromo-propionic acid, p-toluenesulfonic acid and toluene into a container; connecting a water distributer on a container; S2, putting the container in an oil bath pot being 110 to 130 DEG C for constant temperature heating; performing condensing backflow for 7 to 10 hours; then, opening a side pipe piston of a water distributor to discharge out toluene-water mixed solution in the side pipe; evaporating out the toluene in the container to obtain a cellulose 2-bromopropionate coarse product; S3, performing post treatment on the cellulose and 2-bromopropionatecoarse product in the S2 to obtain dry cellulose 2-bromopropionate; S4, adding 1-methylimidazole and cellulose 2-bromopropionate dried in S3 into ethanol; performing water bath constant temperature stirring reaction for 24 to 48 hours at 40 to 70 DEG C; then, performing washing and drying to obtain the adsorbent. The method is simple; the used raw materials can be easily obtained.

Description

technical field [0001] The invention relates to the technical field of dye adsorption, in particular to an ionic liquid modified cellulose-based adsorbent as well as its preparation method and application. Background technique [0002] In recent years, due to the rapid development of printing and dyeing, textile and papermaking industries, the pollution of dye wastewater has become increasingly serious. Due to the high toxicity of dye-containing wastewater, it is easy to cause carcinogenic and teratogenic hazards to organisms, so the treatment of dye-containing wastewater has become an urgent problem to be solved. Based on the advantages of high efficiency, low cost and easy operation, adsorption is a more practical method for treating dye wastewater. [0003] Cellulose is the most abundant biopolymer resource in the world. In addition to its advantages of biodegradability and less environmental pollution, it also has the advantages of abundant sources and low price. Due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/24C02F1/28C02F101/30C02F101/34C02F101/38
CPCB01J20/24C02F1/286C02F2101/308C02F2101/34C02F2101/38C02F2101/40
Inventor 张素风杨苗秀钱立伟侯晨唐蕊华雷丹刘丽娜肖峰
Owner SHAANXI UNIV OF SCI & TECH
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