Preparation method of cellulose adsorbent

A cellulose and adsorbent technology, which is applied in the field of preparation of cellulose adsorbents, can solve the problems of incapable metal ion adsorption operation process, high toxicity of reaction reagents, complicated operation process, etc., and achieves less process equipment, low price, and synthesis steps. simple effect

Inactive Publication Date: 2007-10-24
JIANGSU QIANGLIN BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 1049264C discloses that acrylic fiber is used as a raw material, first cross-linked with hydrazine hydrate solution to obtain cross-linked fiber, and then reacted with ethylenediamine and polymerization inhibitor sulfur powder according to the proportion to obtain a synthetic fiber adsorbent. to Cu 2+ The adsorption capacity is only 3.02mg / g, and the operation process is relatively complicated, and the reaction reagent is highly toxic and expensive
Chinese patent 1120044C discloses that acrylamide is grafted and copolymerized on cellulose fibers, and then the natural fiber adsorbent is obtained through the Hoffman conversion reaction. This adsorbent has a good adsorption effect on weakly basic anions, but cannot Adsorption and the operation process is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Weigh 3 g of bagasse pulp cellulose into a 250 mL four-necked bottle, add 100 g of 30% sodium hydroxide solution, stir for 60 min, filter, wash with water until neutral, and press dry to obtain alkalized cellulose.

[0017] (2) Measure 5 mL of acrylic acid, neutralize with 8.64 mL of 6 mol / L NaOH solution and cool to room temperature. Weigh 3.15g of acrylamide and 0.76g of methacryloxyethyltrimethylammonium chloride, dissolve them in 20mL of distilled water, add acrylic acid neutralizing solution, and mix well. Add the alkalized cellulose to the mixture and stir well. The temperature of the water bath was raised to 70°C. Weigh 0.171g of ammonium persulfate and 0.079g of sodium bisulfite, and dissolve in a small amount of water to make the initiator concentration 4%. After the temperature of the system rose to 70°C, the initiator was added and reacted for 2 hours.

[0018] (3) After the product is washed with dilute alkaline solution, it is washed with water until...

Embodiment 2

[0020] (1) Weigh 4.09 g of bagasse pulp cellulose into a 250 mL four-neck bottle, add 100 g of 30% sodium hydroxide solution, stir for 90 min, filter and wash with water until neutral to obtain alkalized cellulose.

[0021] (2) Measure 5.38 mL of acrylic acid, neutralize it with 7.85 mL of 6 mol / L NaOH solution and cool to room temperature. Weigh 3.15g of acrylamide and 0.76g of methacryloyloxyethyltrimethylammonium chloride, stir with 20mL of distilled water to dissolve them. Then add acrylic acid neutralizer and mix well. Add the alkalized cellulose to the mixture and stir well. The water bath was warmed to 60 °C. Weigh 0.171g of ammonium persulfate and 0.079g of sodium bisulfite, and dissolve in a small amount of water to make the initiator concentration 4.8%. After the temperature of the system rose to 60°C, the initiator was added and reacted for 3 hours.

[0022] (3) After the product is washed with dilute alkaline solution, it is washed with water until neutral, and...

Embodiment 3

[0024] (1) Weigh 2.39g of bagasse pulp cellulose into a 250mL four-neck bottle, add 100g of 40% sodium hydroxide solution, stir for 60min, filter and wash with water until neutral to obtain alkalized cellulose.

[0025] (2) Measure 5.38mL of acrylic acid, neutralize with 10.54mL of 6mol / L NaOH solution and cool to room temperature. Weigh 3.15g of acrylamide and 0.76g of methacryloyloxyethyltrimethylammonium chloride, stir with 20mL of distilled water to dissolve them. Then add acrylic acid neutralizer and mix well. Add the alkalized cellulose to the mixture and stir well. The water bath was warmed to 60 °C. Weigh 0.171g of ammonium persulfate and 0.079g of sodium bisulfite, and dissolve in a small amount of water to make the initiator concentration 4.8%. After the temperature of the system rose to 60°C, the initiator was added dropwise and reacted for 2 hours.

[0026] (3) After the product is washed with dilute alkaline solution, it is washed with water until neutral, and...

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Abstract

The fiber absorbent is made by weighing the fiber, acroleic acid, acrylamide and epoxy propyl-trimethyl ammonium chloride, alkalizing the fiber with NaOH solution to neutral to get alkalized fiber, neutralizing the acroleic acid integral to get the alkaline solution to add acrylamide, adding alkalized fiber then twisting it evenly, heating and weighing free polymer reaction introducer, solving into proper water, adding to the reaction system, triggering graft copolymerization, cleaning the product with NaOH solution then watering it till Ph is 5-7, and drying it to get the fiber absorbent. It is rich in resource and cheap in price.

Description

1. Technical field [0001] The invention belongs to a chemical modification of natural fibers, in particular to a preparation method of a cellulose adsorbent. 2. Background technology [0002] Prior art: In the prior art, fiber adsorbents include synthetic fiber adsorbents and natural fiber adsorbents. Traditional adsorbents, such as activated carbon, ion-exchange fibers, etc., are inconvenient to use and regenerate due to their granular or powdery form. Fiber-based adsorbents can overcome this shortcoming. Synthetic fiber adsorbents are made by copolymerization of functional monomers or functional modification of synthetic fibers, which are expensive and cannot be degraded naturally, causing pollution to the environment; natural fiber adsorbents are chemically modified to convert natural fibers themselves The group contained in it is functionalized, or the adsorbent obtained by introducing active groups on the natural fiber skeleton. The present invention proposes a prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24
Inventor 商士斌王瑀王丹宋湛谦王宏晓
Owner JIANGSU QIANGLIN BIO ENERGY
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