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Chlorine-free cellulose fibers and preparation method thereof

A cellulose fiber and temperature control technology, applied in the chemical industry, can solve the problems of environmental pollution and high toxicity, and achieve the effects of reducing environmental pollution, increasing solubility, and improving production efficiency

Active Publication Date: 2012-09-05
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are differences due to the different substitution positions of chlorine atoms. Among dioxins, 2,3,7,8-tetrachloro-dibenzo-p-dioxin is the most toxic, as long as one ounce (28.35 grams) is It can kill 1 million people, which is equivalent to 1000 times that of potassium cyanide. This is by far one of the most toxic compounds and contains a variety of toxic substances, which seriously pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a kind of preparation method of chlorine-free cellulose fiber, comprises the following steps:

[0018] a. Preparation of spinning stock solution: firstly mix and dissolve cotton pulp with a degree of polymerization of 1500 and ionic liquid, control the temperature at 83°C during dissolution, then defoam and prepare spinning stock solution, cellulose accounts for 5% of the weight of spinning stock solution , the temperature during defoaming is controlled at 83°C, and the ionic liquid is 1-allyl, 3-methylclomidazolium salt solution;

[0019] b. Preparation of spinning solution: Dissolving the fluorescent whitening agent produced by Beijing Odyssey Chemical Co., Ltd. in ethylene glycol to make a fluorescent whitening agent solution, adding the fluorescent whitening agent solution to the spinning stock solution prepared in step a And stir evenly, after continuous defoaming and filtering process, let it stand for 2 hours to obtain spinning solution. The tempera...

Embodiment 2

[0024] Embodiment 2, a kind of preparation method of chlorine-free cellulose fiber, comprises the following steps:

[0025] a. Preparation of spinning stock solution: firstly, wood pulp with a degree of polymerization of 1200 is mixed and dissolved with ionic liquid, the temperature during dissolution is controlled at 88°C, and then defoaming is prepared into spinning stock solution, cellulose accounts for 9% of the weight of spinning stock solution , the temperature during defoaming is controlled at 88°C, and the ionic liquid is 1-butyl, 3-methylclomidazolium salt solution;

[0026] b. Preparation of spinning solution: Dissolving the fluorescent whitening agent produced by Zhuhai Huada Haohong Chemical Co., Ltd. in ethylene glycol to make a fluorescent whitening agent solution, adding the fluorescent whitening agent solution to the spinning stock solution prepared in step a Neutralize and stir evenly, after continuous defoaming and filtering process and then stand still for 1...

Embodiment 3

[0031] Embodiment 3, a kind of preparation method of chlorine-free cellulose fiber, comprises the following steps:

[0032] a. Preparation of spinning dope: first, wood pulp with a degree of polymerization of 900, cotton pulp with a degree of polymerization of 800 and ionic liquid are mixed and dissolved, the mass ratio of wood pulp and cotton pulp is 4: 1, and the temperature during dissolution is controlled at 95 ℃, and then defoaming is prepared into spinning stock solution, cellulose accounts for 13% of spinning stock solution weight, and the temperature during defoaming is controlled at 95 ℃, and ionic liquid is chlorinated 1-(2-hydroxyethyl)-3-methanol Kiimidazole solution;

[0033] b. Preparation of spinning solution: Dissolve the fluorescent whitening agent produced by Shangyu Xiayi Chemical Co., Ltd. in ethylene glycol to make a fluorescent whitening agent solution, and add the fluorescent whitening agent solution to the spinning stock solution prepared in step a And...

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Abstract

The invention relates to chlorine-free cellulose fibers of which the whiteness is 90 to 95 percent. The chlorine-free high-whiteness cellulose fibers are prepared by the following steps: preparing spinning raw solution; dissolving fluorescent whitening agent in glycol to prepare solution; adding the solution into the spinning raw solution and uniformly stirring; continuously defoaming, filtering,standing and obtaining spinning solution; and spraying the spinning solution, spinning in the air to form filaments, obtaining formed cellulose fibers by a filament drawing process, and drawing, rising and oiling the formed cellulose fibers. In the invention, the spinning with ionic liquid solution increases the solubility of the spun fibers and improved production efficiency; the drawback of generating a large amount of hydrogen sulfide and carbon disulfide in a yellowing process of the conventional viscose process is overcome, environmental pollution is reduced, and harm to the heath of operators is reduced; and the fluorescent whitening agent is added in the preparation process of the spinning raw solution, so the whiteness of the obtained cellulose fibers is as high as more than or equal to 90 percent.

Description

technical field [0001] The invention relates to a cellulose fiber and a preparation method thereof, in particular to a chlorine-free cellulose fiber and a preparation method thereof, belonging to the technical field of chemical engineering. Background technique [0002] The preparation process of solvent-based cellulose fiber generally includes the following steps: mixing and dissolving the raw materials to obtain a spinning solution, which is filtered and defoamed, then spun and washed to obtain cellulose fibers, and then stretched, washed and The finished short fiber is cut to obtain the finished short fiber. Because the whiteness of the finished cellulose fiber obtained by the above process is low, in order to obtain the cellulose fiber with higher whiteness, at present, hypochlorite or hydrogen peroxide is usually used for bleaching to achieve the purpose of whitening. In view of Depending on the pulp, the fiber whiteness can be bleached up to about 85%, and bleaching wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F2/08D01F2/16
Inventor 逄奉建曹其贵刘建华姜明亮王东秦翠梅卢海蛟
Owner 潍坊欣龙生物材料有限公司