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Method for quickly and accurately determining reactive property of dissolving pulp

A reaction performance and accurate measurement technology, applied in the direction of measuring device, color/spectral characteristic measurement, material analysis through optical means, etc., can solve the problem of low accuracy, achieve high accuracy, simplify operation process, and objective and accurate results Effect

Inactive Publication Date: 2016-02-03
SOUTH CHINA UNIV OF TECH
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  • Description
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Problems solved by technology

Although this method is relatively time-consuming, its accuracy is quite low

Method used

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  • Method for quickly and accurately determining reactive property of dissolving pulp
  • Method for quickly and accurately determining reactive property of dissolving pulp
  • Method for quickly and accurately determining reactive property of dissolving pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] Such as Figures 1 to 4 shown.

[0033] (1) Sample alkalization and yellowing pretreatment:

[0034] Accurately weigh 0.50±0.01g (accurate to 1mg) of the sample to be tested and B-type 21×6mmmm stirrer B into a 150mL reagent bottle R with a lid that can be completely sealed, and then add 45mL of 11% w / w 30°C to the bottle Sodium hydroxide solution, after capping the bottle, place the reagent bottle on a temperature-controllable magnetic stirrer A, control the temperature at 30±1°C, and then stir at a stirring rate of 300rpm for 10min alkalization treatment. Then open the reagent bottle, add 1mL of carbon disulfide to it, and quickly cap the bottle, shake it up quickly, then place the reagent bottle on a magnetic stirrer with temperature control at 30±1°C for 3 hours of yellowing reaction, Stirring speed was maintained constant. After the reaction time is over, open the reagent bottle, add 50mL of distilled water to dilute, and then stir to obtain viscose; the sample ...

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Abstract

The invention discloses a method for quickly and accurately determining the reactive property of dissolving pulp, and particularly relates to a method for determining the reactive property of the dissolving pulp by utilizing an attenuated total reflection and ultraviolet-visible spectrometry. The method comprises the steps of (1) carrying out sample alkalization and yellowing pretreatment; (2) establishing a chemometrics prediction model; (3) detecting a sample solution by adopting an attenuated total reflection-ultraviolet / visible spectrophotometer; (4) outputting a result. The method disclosed by the invention has the effects that the reactive property of the dissolving pulp is determined by adopting the method, the operation is quick and simple, the detecting result can be given out on the spot after a yellowing reaction is completed, and the result is objective and accurate.

Description

technical field [0001] The invention relates to the fields of pulping, papermaking and chemical fiber industry, in particular to a method for rapidly and accurately measuring the reaction performance of dissolving pulp. Background technique [0002] Dissolving pulp, also known as pulp, is mainly obtained from cotton linters as raw material through caustic soda method and wood as raw material through prehydrolysis sulfate method or sulfite method, and then bleached to remove most of the lignin. High whiteness fine chemical pulp. It is a raw material for many chemical products, and can prepare various cellulose derivatives through derivatization reactions (esterification or etherification, etc.), such as making various cellulose ethers (carboxymethylcellulose, hydroxypropyl Cellulose, etc.), cellulose esters (cellulose sulfonate, cellulose acetate, and cellulose nitrate, etc.) and other derivatives. In the relevant reaction process of these preparations of cellulose derivati...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/552
Inventor 何亮柴欣生
Owner SOUTH CHINA UNIV OF TECH
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