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A kind of preparation method of fluorescence eliminating agent

A technology of fluorescence remover and chelating agent, applied in textile and papermaking, non-fibrous pulp addition, papermaking, etc., can solve the problems of increased environmental burden, limited removal effect, waste of chemicals, etc., and achieves good fluorescence removal effect and low cost. , the effect of eliminating fluorescence

Active Publication Date: 2017-01-04
ZHEJIANG JIUBEN BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The whiteness of the pulp decreased after the above-mentioned strong oxidizing fluorescence eliminating agent eliminates the fluorescence, which causes the whiteness increased by the previous bleaching to be almost completely offset, which not only causes waste of chemicals, but also increases the process and consumes a lot of resources. increase the burden on the environment
The polyamide-based fluorescence inhibitors have a certain effect on suppressing fluorescence, but for systems with strong fluorescence, their removal effect is limited

Method used

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  • A kind of preparation method of fluorescence eliminating agent
  • A kind of preparation method of fluorescence eliminating agent
  • A kind of preparation method of fluorescence eliminating agent

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This example provides a method for preparing a fluorescence eliminating agent. The main raw materials and dosage are shown in the following table:

[0031]

[0032] Add 375 parts of deionized water to a 1-liter four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a nitrogen inlet tube, slowly add 8.0 parts of CMC under stirring, and add 60% of dimethylformamide after the CMC is completely dissolved. Diallyl ammonium chloride aqueous solution 186 parts, acrylamide solid 14.8 parts, methylenebisacrylamide 1.6 parts, EDTA 0.06 parts, allyl sodium sulfonate 0.6 parts, stir for 30 minutes, pass nitrogen, heat Raise the temperature to 98°C, place 32.0 parts of 6.25% ammonium persulfate aqueous solution and 159.6 parts of 37.3% acrylamide aqueous solution in different constant pressure dropping funnels, and quickly drop one third of the persulfate solution after the temperature stabilizes. Ammonium sulfate aqueous solution, after 20 minutes of re...

Embodiment 2

[0034] This example provides a method for preparing a fluorescence eliminating agent. The main raw materials and dosage are shown in the following table:

[0035]

[0036]

[0037] Add 324.0 parts of deionized water to a 1-liter four-necked flask equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen inlet tube, and slowly add 4.8 parts of CMC under stirring, and add 60% of dimethylformamide after the CMC is completely dissolved. Diallyl ammonium chloride aqueous solution 266.0 parts, methacrylamide solid 13.6 parts, N,N-dimethylacrylamide 2.4 parts, EDTA-2Na 0.049 parts, methallyl sodium sulfonate 0.72 parts, After stirring for 30 minutes, pass nitrogen gas, heat up to 98°C, place 32.4 parts of 7.4% ammonium persulfate aqueous solution and 134.8 parts of 40.6% methacrylamide aqueous solution in different constant pressure dropping funnels, when the temperature is stable Afterwards, quickly add one-third of the ammonium persulfate aqueous solution dro...

Embodiment 3

[0039] This example provides a method for preparing a fluorescence eliminating agent. The main raw materials and dosage are shown in the following table:

[0040]

[0041] Add 277 parts of deionized water to a 1-liter four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a nitrogen inlet tube, slowly add 2.8 parts of HEC under stirring, and add 60% of dimethylformamide after the HEC is completely dissolved. 358.4 parts of diallyl ammonium chloride aqueous solution, 10.7 parts of acrylamide solid, 2.3 parts of N,N-dimethylacrylamide, 0.056 parts of EDTA-4Na, 2.8 parts of isopropanol, and nitrogen gas after stirring for 30 minutes , heat up to 98°C, place 34.2 parts of 12.3% ammonium persulfate aqueous solution and 93.1 parts of 46.3% acrylamide aqueous solution in different constant pressure dropping funnels, and quickly drop one-third of the amount after the temperature is stable Initiator aqueous solution, after 30 minutes of reaction, drop the r...

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Abstract

The invention relates to a preparation method of a fluorescence eliminating agent. The method comprises the steps as follows: in the presence of a metal ion chelating agent, a chain transfer agent, a crosslinking agent and an initiator, polymeric monomers and cellulose derivatives are stirred to react to produce a grafted copolymer in a solvent at the temperature in a range of 60-110 DEG C, after the reaction, a terminating agent is added, the pH is adjusted to be in a range of 1-5, and the fluorescence eliminating agent is obtained; the feeding mass ratio of the polymeric monomers to the cellulose derivatives to the metal ion chelating agent to the chain transfer agent to the crosslinking agent to the initiator is in a range of 100:(0.1-10):(0.01-0.03):(0.05-5):(0.05-5):(0.1-3.0), the polymeric monomers comprise cationic monomers and unsaturated amide monomers, and the mass ratio of the cationic monomers to the unsaturated amide monomers is in a range of (1-10):1. The method is simple in preparation technology, lower in cost and easy to realize industrially. Meanwhile, the fluorescence eliminating agent obtained with the method can be well combined with paper fibers to become a part of a piece of paper and is good in fluorescence eliminating effect and lasting in effect.

Description

technical field [0001] The invention relates to a preparation method of a fluorescence eliminating agent. Background technique [0002] my country is a big country in paper production and consumption, and the paper industry is an important part that affects people's production and life. my country is a country with poor forest resources. According to the statistics of the National Bureau of Statistics, the per capita forest area is only 0.132 hectares, and a large amount of commercial wood pulp and waste paper raw materials are imported every year. However, my country's non-wood fiber raw materials - straw resources are abundant. According to calculations, my country produces about 100 million tons of wheat straw every year. In addition to being returned to the field and directly burned, the proportion of wheat straw as industrial raw materials is less than 20%, which is mainly used for pulping. Besides rice straw and corn stalks are used for cooking in rural earthen stov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08F226/02C08F220/56C08F222/38C08F220/54C08F220/34D21H21/14
Inventor 封玉凤章君东
Owner ZHEJIANG JIUBEN BIOCHEM