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A kind of method utilizing bamboo pulp to prepare hydroxyethyl cellulose

A technology of hydroxyethyl cellulose and bamboo pulp, which is applied in the field of preparation of hydroxyethyl cellulose, can solve the problems of large differences in cellulose energy, achieve good solubility, easy post-processing, and stable solution

Active Publication Date: 2016-04-06
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Hydroxyethyl cellulose has the superior properties of thickening, suspending, dispersing, emulsifying, adhering, film-forming, protecting moisture and improving protective colloid, and can be widely used in petroleum, paint, construction, medicine, food, textile, paper industry And polymer polymerization and other fields; but industrial production is generally carried out in a heterogeneous system, but the prepared cellulose varies greatly in energy

Method used

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  • A kind of method utilizing bamboo pulp to prepare hydroxyethyl cellulose
  • A kind of method utilizing bamboo pulp to prepare hydroxyethyl cellulose
  • A kind of method utilizing bamboo pulp to prepare hydroxyethyl cellulose

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Weigh 200g of urea and 100g of monoethanolamine and mix them uniformly in a reaction vessel, heat to 110°C for 3 hours; add 3000g of sodium hydroxide solution with a concentration of 7.6%, mix well, freeze to -7°C to obtain a solvent; Adding the content of 75g alpha cellulose in 2925g solvent is 95%, and the bamboo pulp of degree of polymerization is 800 and stirs rapidly at room temperature 10 minutes, obtains the bamboo pulp solution that mass concentration is 2.5%; Chlorohydrin (chlorohydrin and bamboo The molar ratio of the glucose units in the pulp is 6) into the bamboo pulp solution, react at room temperature for 3 hours, then raise the temperature to 55°C and react for 2 hours; neutralize with hydrochloric acid until the solution is neutral to stop the reaction, and separate, that is 91.3 g of hydroxyethylcellulose were obtained. figure 1 A in is the infrared spectrogram of hydroxyethyl cellulose; figure 2 It is the proton magnetic resonance spectrum of hydroxy...

Embodiment 2

[0033] Weigh 200g of urea and 100g of monoethanolamine and mix them uniformly in a reaction vessel, heat to 110°C for 3 hours; add 3000g of sodium hydroxide solution with a concentration of 7.6%, mix well, freeze to -7°C to obtain a solvent; Adding the content of 90g alpha cellulose in 2910g solvent is 95%, and the bamboo pulp of degree of polymerization is 800 and stirs rapidly at room temperature 10 minutes, obtains the bamboo pulp solution that mass concentration is 3%; Chlorohydrin (chlorohydrin and glucose The molar ratio of the unit is 6) adding it to the bamboo pulp solution, reacting at room temperature for 3 hours, raising the temperature to 55°C and reacting for 2 hours; neutralizing with hydrochloric acid until neutral to stop the reaction, and separating to obtain 110.3g of hydroxyethyl cellulose white. figure 1 b in is the infrared spectrogram of hydroxyethyl cellulose; image 3 It is the proton magnetic resonance spectrum of hydroxyethyl cellulose; Figure 7 It...

Embodiment 3

[0035] Weigh 200g of urea and 100g of monoethanolamine and mix them uniformly in a reaction vessel, heat to 110°C for 3 hours; add 3000g of sodium hydroxide solution with a concentration of 7.6%, mix well, freeze to -7°C to obtain a solvent; Adding the content of 105g alpha cellulose in 2895g solvent is 95%, and the bamboo pulp of polymerization degree is 800 and stirs rapidly at room temperature 10 minutes, obtains the bamboo pulp solution that mass concentration is 3.5%; Chlorohydrin (chlorohydrin and glucose The molar ratio of the unit is 6) adding it to the bamboo pulp solution, reacting at room temperature for 3 hours, raising the temperature to 55°C and reacting for 2 hours; neutralizing with hydrochloric acid until neutral to stop the reaction, and separating to obtain 127.6g of hydroxyethyl cellulose white.

[0036] figure 1 C in is the infrared spectrogram of hydroxyethyl cellulose; Figure 4 It is the proton magnetic resonance spectrum of hydroxyethyl cellulose; ...

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Abstract

The invention discloses a method for preparing hydroxyethyl cellulose by utilizing a bamboo pulp. The method comprises the steps: firstly preparing a hydroxyethyl urea / urea / sodium hydroxide aqueous solution, then dissolving the bamboo pulp in the aqueous solution, adding a proper proportion of chloroethanol, and carrying out a reaction in the homogeneous phase to prepare hydroxyethyl cellulose. The adopted solvent is non-toxic and environmentally friendly, and the bamboo pulp is basically not degraded in the reaction process; and the method has the advantages of easy operation, mild reaction conditions, high yield, easy control of the substitution degree and the like, and has a wider application prospect.

Description

technical field [0001] The invention relates to a method for preparing hydroxyethyl cellulose by using bamboo pulp. Background technique [0002] Bamboo is a monocotyledonous plant of the Poaceae Bamboo subfamily. There are about 39 genera and more than 500 species in China, with an area of ​​more than 5 million hectares of bamboo forests. 2 , accounting for more than 20% of the total area of ​​bamboo forests in the world, is an ideal and excellent biomass resource. [0003] Hydroxyethyl cellulose has the superior properties of thickening, suspending, dispersing, emulsifying, adhering, film-forming, protecting moisture and improving protective colloid, and can be widely used in petroleum, paint, construction, medicine, food, textile, paper industry And polymer polymerization and other fields; but industrial production is generally carried out in a heterogeneous system, but the prepared cellulose varies greatly in energy. [0004] The 200510019340.X patent proposes a homoge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B11/08
Inventor 陈礼辉卢玉栋黄六莲
Owner FUJIAN AGRI & FORESTRY UNIV
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