Method for quickly measuring content of calcium carbonate in paper through headspace gas chromatography

A headspace gas chromatography and rapid determination technology, applied in the field of papermaking, can solve the problems of low accuracy, unreported calcium carbonate fillers, and many influencing factors, and achieves high accuracy, fast measurement speed, and improved normal operation. Effect
CN103616447BInactive Publication Date: 2014-11-26FUJIAN AGRI & FORESTRY UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUJIAN AGRI & FORESTRY UNIV
Publication Date
2014-11-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for quickly measuring the content of calcium carbonate in paper through headspace gas chromatography. The method comprises the following steps of: preparing a pulp sample to be measured from a sodium hydroxide dilute solution by a high speed agitator, acidizing the pulp sample by using sulfuric acid to generate carbon dioxide, measuring the content of the gaseous-phase carbon dioxide through the headspace gas chromatography, and calculating the content of calcium carbonate in paper according to the content of the carbon dioxide. The method is quick, accurate, good in reproducibility, easy to implement and the like. The method for measuring the content of calcium carbonate in paper is applied to the process of manufacturing paper with pulp, and capable of effectively monitoring the addition amount of a filler to paper and ensuring normal running of a paper machine and quality stability of the final product.
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Description

technical field

[0001] The invention relates to the field of papermaking, in particular to a method for measuring calcium carbonate filler content in paper. Background technique

[0002] In the paper industry, the addition of mineral fillers to pulp has a long history. As early as the eighth century, there was a production practice of adding minerals to pulp to improve the whiteness and printing performance of paper. Adding mineral fillers to pulp has three main advantages: one is to replace part of the plant fibers with cheap fillers, which saves raw material costs; the other is that the addition of fillers can increase the water filtration speed of pulp and increase the dryness of wet paper after pressing , reduce energy consumption in the drying section of the paper machine; third, adding fillers to the paper can improve the optical properties and printing adaptability of the paper. Due to the above advantages, filling has been greatly developed in the paper industry. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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