Method for rapidly determining reaction performance of dissolving pulp

A reaction performance and rapid measurement technology, which is applied in the field of pulp and paper making, can solve the problems that the measurement process is greatly affected by the environment, the measurement cycle is long, and the measurement process is cumbersome.

Active Publication Date: 2017-07-25
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the measurement process is relatively cumbersome, the measurement period is long, and the measurement process is greatly affected by the environment, and the stability of the measurement results is not good.

Method used

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  • Method for rapidly determining reaction performance of dissolving pulp
  • Method for rapidly determining reaction performance of dissolving pulp
  • Method for rapidly determining reaction performance of dissolving pulp

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Embodiment Construction

[0023] Taking the reaction performance measurement of some dissolving pulp samples as an example below, the embodiment of the present invention is described in further detail:

[0024] 1 Preparation of test reagents

[0025] a) Silver sulfate sulfuric acid solution: Dissolve 1g of silver sulfate solid in 100ml of concentrated sulfuric acid (ρ=1.84g / ml) to prepare a silver sulfate solution with a concentration of 0.01g / ml, and place the prepared solution in a brown bottle Put it aside for 1-2 days, and use it after the silver sulfate solid is completely dissolved;

[0026] b) Mercury sulfate solution: Measure about 100ml of concentrated sulfuric acid, slowly add it into a beaker filled with about 900ml of water (conductivity<5.0μs / cm, the same below), and make a sulfuric acid aqueous solution with a concentration of about 17%wt. The solution was stirred and mixed, then cooled to room temperature for later use. Weigh 125g of mercuric sulfate solid and add it to about 500ml of ...

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Abstract

The present invention discloses a method for rapidly determining the reaction performance of a dissolving pulp, and relates to the field of pulp preparation-papermaking and textile. According to the invention, cellulose precipitated from a viscose liquid is rapidly digested and oxidized by potassium dichromate, the absorbance of the solution after the reaction is determined by an ultraviolet spectrophotometer, and finally the mass of the cellulose participating in the yellowing reaction is calculated through mathematical conversion, such that the reaction performance of the dissolving pulp is rapidly determined; and with the method, the influence of the related factors is reduced, the stability of the dissolving pulp reaction performance determination result is increased, and the problems of complex operation process, long determination period and poor repeatability of the traditional dissolving pulp reaction performance determination method are solved.

Description

technical field [0001] The invention relates to the field of pulping and papermaking and the field of textiles, in particular to a fast and efficient method for measuring the reaction performance of dissolving pulp. Background technique [0002] Dissolving pulp is a kind of refined chemical pulp made of plant fiber. Its cellulose content is between 90% and 99%, hemicellulose is less than 4%, and contains trace amounts of lignin, extractives and minerals. The reaction performance is a very important indicator for evaluating the quality of dissolving pulp. There are two main methods for measuring the reaction performance of dissolving pulp: one is my country’s textile industry standard "FZ / T 50010.13-2011 Pulp Reactivity for Viscose Fiber" Determination of "The method adopted is the viscose filtration method. In this method, pulp samples are first dissolved in a mixture of sodium hydroxide and carbon disulfide to form viscose, and then 10,000 pores / cm 2 The viscose liquid is ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N1/28
CPCG01N1/28G01N21/31
Inventor 石瑜田超刘艳钊杨小博龚琛倪建萍
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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