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Anhydrous phosphoric acid/phosphate solvent and application thereof in dissolving cellulose

A technology for dissolving cellulose and anhydrous phosphoric acid, which is applied in the preparation of artificial filaments and spinning solutions in cellulose solutions, can solve the problems of expensive solvents, environmental pollution, flammable and explosive, etc., and achieve solvent recovery. Simple, solve the problem of environmental pollution, the effect of low price

Inactive Publication Date: 2012-10-17
SHIJIAZHUANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cellulose solvent, which solves the technical problems of expensive solvents, flammable and explosive, polluting the environment and difficult recovery in the old technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 9.8 grams of anhydrous phosphoric acid and 0.47-2.82 grams of trimethyl phosphate. Add trimethyl phosphate dropwise to anhydrous phosphoric acid. After the dropwise addition, stir slowly until the anhydrous phosphoric acid is completely dissolved. Weigh 8 grams of the above-prepared solvent, place it in a heating mantle and raise the temperature to 30° C. to keep it warm. Weigh 1 gram of cotton fiber, add the cotton fiber to the solvent little by little, and then stir until the cellulose is completely dissolved. The cellulose solution is placed in a high-speed centrifuge to remove the air, and the obtained solution is spun through a spinning machine using wet spinning technology. After being solidified by the solidifying liquid, it is washed several times to obtain regenerated cellulose.

Embodiment 2

[0029] Weigh 9.8 grams of anhydrous phosphoric acid and 0.42 to 2.52 grams of dimethyl phosphate. Dimethyl phosphate was added dropwise to anhydrous phosphoric acid. After the dropwise addition, stir slowly until the anhydrous phosphoric acid is completely dissolved. Weigh 8 grams of the above-prepared solvent, place it in a heating mantle and raise the temperature to 30° C. to keep it warm. Weigh 1 gram of cotton fiber, add the cotton fiber to the solvent little by little, and then stir until the cellulose is completely dissolved. The cellulose solution is placed in a high-speed centrifuge to remove the air, and the obtained solution is spun through a spinning machine using wet spinning technology. After being solidified by the solidifying liquid, it is washed several times to obtain regenerated cellulose.

Embodiment 3

[0031] Weigh 9.8 grams of anhydrous phosphoric acid and 0.61 to 3.63 grams of monomethyl phosphate. Add triethyl phosphate dropwise to anhydrous phosphoric acid. After the dropwise addition, stir slowly until the anhydrous phosphoric acid is completely dissolved. Weigh 5 grams of the prepared solvent, place it in a heating mantle and raise the temperature to 40° C. to keep it warm. Weigh 1 gram of cotton fiber, add the cotton fiber to the solvent little by little, and then stir until the cellulose is completely dissolved. The cellulose solution is placed in a high-speed centrifuge to remove the air, and the obtained solution is spun through a spinning machine using wet spinning technology. After being solidified by the solidifying liquid, it is washed several times to obtain regenerated cellulose.

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Abstract

The invention discloses a solvent for dissolving cellulose. The composition of the solvent is an anhydrous phosphoric acid / phosphate system. The general formula of the phosphate is disclosed in the specification, wherein R1, R2 and R3 are respectively hydrogen or alkyl group, all of R1, R2 and R3 are not H; and the general formula of R is CnH2n+1, and n<=4. The phosphate can be trimethyl phosphate, dimethyl phosphate, monomethyl phosphate, triethyl phosphate, diethyl phosphate, momoethyl phosphate, tripropyl phosphate, dipropyl phosphate, monopropyl phosphate, tributyl phosphate, dibutyl phosphate, monobutyl phosphate or the like. The preparation method of the solvent for dissolving cellulose comprises the following steps: putting anhydrous phosphoric acid in a beaker, adding the phosphate into the anhydrous phosphoric acid, and slowly stirring to completely dissolve the phosphate, thereby obtaining the anhydrous phosphoric acid / phosphate system cellulose solvent. The system is used for dissolving and regenerating cellulose, and has high dissolving capacity for cellulose. The solvent is spun with a spinning machine by wet spinning technology to implement regeneration and solidification in the curing agent, and is washed several times to obtain the regenerated cellulose. The invention simplifies the alkalification, sulfonation and other processes in the production technique, solves the problem of fiber processing environment pollution, can lower the fiber production cost, and enhances the fiber quality stability.

Description

technical field [0001] The invention relates to a cellulose solvent prepared from anhydrous phosphoric acid and phosphoric acid ester and the application of the solvent in cellulose regeneration, belonging to the technical field of textile fiber regeneration. Background technique [0002] Cellulose fiber is the first regenerated fiber to become a textile fiber. It has the advantages of comfortable wearing and good air permeability, so it has a wide range of uses in the fields of textiles and clothing. Cellulose (C 6 h 10 o 5 )n is a linear macromolecule formed by D2 glucopyranose anhydroglucopyranose linked by β-1,4 glycosidic bonds. , the 4-carbon position is firmly connected. This structure makes the cellulose macromolecules form a complex structure of strong hydrogen bonds and the coexistence of crystalline and amorphous regions within and between molecules, making it difficult for cellulose to dissolve in common solvents to form a true solution. Therefore, seeking a...

Claims

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Application Information

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IPC IPC(8): C08J3/09C08J3/02C08L1/02D01F2/02D01D1/02
Inventor 张星辰刘会茹吕立强
Owner SHIJIAZHUANG UNIVERSITY
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