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Nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp

A technology of waste paper deinking pulp and system, which is applied in the processing of waste paper, addition of retention aids, papermaking, etc. problems, to achieve multiple flocculation opportunities, good retention and drainage effects, and the effects of being conducive to retention and drainage

Inactive Publication Date: 2013-05-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Individual nano-TiO 2 Or the retention and drainage effects of starch and polymers are limited to a certain extent, and the current research does not consider the existence of fillers in actual production, which cannot reflect the actual production conditions well.

Method used

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  • Nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp
  • Nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp
  • Nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A Nano-TiO Applied to Retention and Drainage of Waste Paper Deinking Pulp 2 Binary compound system, including nano-TiO 2 And starch polymers, wherein starch polymers are amphoteric starch (AmS, its cationic substitution degree is 0.020, anionic substitution degree is 0.015) or cationic starch (CS, its cationic substitution degree is 0.035), in the binary system, nano TiO 2 See Table 1 for the addition amount of amphoteric starch or cationic starch. The filler added in the used waste paper deinking pulp is calcium carbonate, which is 20% of the absolute dry pulp of the waste paper deinking pulp.

[0029] Table 1TiO 2 -The concentration of each component in the experiment of starch binary compound system

[0030]

[0031] The steps of the dynamic water filtration experiment are as follows: for the binary system, the experimental process is as follows: take 500mL slurry and add it to the dynamic water filtration instrument, start at an initial speed of 750r / min, add ...

Embodiment 2

[0034] The difference between this example and Example 1 is that polyacrylamide is used as the compound, and the concentration of the compound in each system is shown in Table 2. The filler added to the waste paper deinking pulp is kaolin.

[0035] Table 2TiO 2 -Concentration of components in PAM binary compound system experiment

[0036]

[0037]Dynamic water filtration experiment: For this binary system, if the added compound is cationic polyacrylamide (CPAM, its molecular weight is 6 million, cationic degree 30%), the experimental process is as follows: Take 500mL slurry and add it to the dynamic filtration In the water meter, start with an initial speed of 750r / min, add the corresponding dose of reagent 1 (CPAM) at 30s, adjust the speed to 1200r / min at 35s, reduce the speed to 750r / min at 60s, add the corresponding dose of reagent 2 (nano TiO 2 ), keep the speed at 75s and open the valve of the dynamic water filter to collect the filtrate; if the added compound is an...

Embodiment 3

[0040] The difference between this embodiment and embodiment 1 is: this embodiment uses nano-TiO 2 Based on the ternary compound system, nano-TiO 2 It is compounded with polyacrylamide and starch as a retention and drainage system, and the concentration of the compound in each formula is shown in Table 3. The filler added in the waste paper deinking pulp is talcum powder.

[0041] Table 3 Ternary system experimental formula

[0042]

[0043] Dynamic water filtration experiment: For the ternary system, add reagent 1 (CPAM / APAM: CPAM, its molecular weight is 6 million, cationic degree 30%; APAM, its molecular weight is 6 million) at 30S, add reagent 2 (CS / AmS: AmS, its cationic substitution degree is 0.020, and its anionic substitution degree is 0.015; CS, its cationic substitution degree is 0.035), and reagent 3 (nano-TiO 2 ), accept the filtrate at 110S, and other operations are the same as the binary system.

[0044] from Figure 5 Image 6 We found that formula 3 h...

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Abstract

The invention discloses a nano TiO2 compounded system and application thereof in drainage and retention of waste paper deinking pulp (DIP). The compounded system comprises nano TiO2 and a polymer, wherein the polymer consists of a starch polymer and / or a polyacrylamide polymer; the starch polymer is amphoteric starch or cationic starch, and the polyacrylamide polymer is cationic polyacrylamide oranionic polyacrylamide; in a binary system, the ratio of the nano TiO2 to the starch polymer is (1-10) to 5, and the ratio of the nano TiO2 to the polyacrylamide polymer is (2-20) to 1; and in a ternary system, the ratio of the nano TiO2 to the starch polymer to the polyacrylamide polymer is (1-20) to (1-40) to 1. The multielement compounded system of the nano TiO2 has a good drainage and retention effect of making the DIP, and the retention rate and the water filter performance can be improved.

Description

technical field [0001] The invention relates to a retention and drainage aid for waste paper deinking pulp, in particular to nano-TiO used for retention and drainage of waste paper deinking pulp 2 Multiple compound system. Background technique [0002] Retention and drainage aids are important additives in the paper forming process. In recent years, more and more scholars have devoted themselves to the research of retention and drainage aids in the papermaking process. In the 1980s, the particulate retention and drainage system composed of inorganic negatively charged particles and organic positively charged polymers was widely used in the papermaking process, meeting the needs of high-speed operation of paper machines to a certain extent. Recently, organic positively charged particles and inorganic positively charged particles have also been introduced into the wet end chemistry of paper machines as retention and drainage aids by compounding with other polymers. On the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/10D21H17/67D21C5/02
CPCY02W30/64
Inventor 陈小泉张洪鑫李艳沈文浩
Owner SOUTH CHINA UNIV OF TECH
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