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Method for rapidly detecting viscosity of paper pulp

A rapid measurement and pulp technology, applied in the field of pulp viscosity measurement, can solve the problems of difficult preparation of copper ethylenediamine, long preparation cycle, etc., and achieve the effects of shortening preparation cycle, improving preparation success rate, and improving economic and social benefits.

Active Publication Date: 2013-03-13
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of difficult configuration of copper ethylenediamine and long preparation period, the present invention aims to provide a method for quickly preparing copper ethylenediamine with copper hydroxide to measure pulp viscosity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of the sample: Take a representative pulp sample, add water to the wet pulp disintegrator and disperse it into a fibrous shape, there should be no pulp lumps or fiber bundles, and then use a copper mesh covered with a clean white cloth to dry it in hand. The paper machine (or other forming equipment) is copied to a weight of 40g / m 2 The paddles do not need to be squeezed, and are air-dried together with a dry cloth. Finally, the pulp sheet was removed from the white cloth, torn into small pieces of 5 mm × 5 mm, placed in a dry and clean glass bottle, tightly plugged with a sieve, and left overnight to allow the water to reach equilibrium.

[0046] (2) Weighing of the sample: weigh 0.1090 g of the balanced sample, and place the sample in a dissolution bottle. Another slurry sample was taken to measure the moisture of the sample according to GB / T741, and the moisture content was 5%.

[0047] (3) Preparation of the sample solution: use a pipette to draw 1...

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PUM

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Abstract

The invention relates to a method for rapidly detecting viscosity of paper pulp, and especially relates to a method for preparing copper ethene diamine by using a rapid method to detect the viscosity of the paper pulp. The copper ethene diamine employs a rapid method for preparing the copper ethene diamine, the process for preparing the copper ethene diamine by copper sulphate is improved, Compared with the prior art, the preparation period is shortened, the method of the invention substantially reduce the relative influence factors in the preparation process of the copper ethene diamine, the preparation success rate of the copper ethene diamine is greatly increased, thereby the efficiency for detecting the viscosity of the paper pulp can be greatly enhanced.

Description

technical field [0001] The invention relates to a method for measuring pulp viscosity, in particular to a method for rapidly preparing copper ethylenediamine by using copper hydroxide to measure pulp viscosity. Background technique [0002] Pulp viscosity is mainly used to characterize the average length of cellulose molecular chains. The viscosity of pulp can not only indirectly indicate the degree of degradation and damage of cellulose during cooking and bleaching processes, but also can further evaluate the physical properties of pulp, so it is of great significance to measure the viscosity of pulp. The viscosity of pulp is usually measured using a capillary viscometer. Before the measurement, it is first necessary to select a suitable solvent to dissolve the cellulose substance, and then use the formed cellulose solution for measurement. In the past, cuproammonia solution was used as a solvent, but because cuproammonia solution is not easy to prepare, unstable and pron...

Claims

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Application Information

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IPC IPC(8): G01N11/06G01N1/28
Inventor 吕卫军陈彬
Owner CHINA NAT PULP & PAPER RES INST CO LTD