JPS59223391A - Deinking agent for regenerating used paper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deinking agent used when recycling used paper such as newspapers and magazines. More preferably, the present invention relates to a derailing agent which can be used to derail newspapers, magazines, etc. using a 70-tissue method, a combination method of solotsion/water washing, and obtain a de-crystallized pulp with high whiteness and a small amount of residual ink.

mr lt++ The recycling of used paper such as magazines has been practiced for a long time, and in the past it was mostly used as a bulking agent. Due to structural changes, waste paper is recognized as an important resource. With the development of deinking technology, deinked pulp is now equivalent in quality to virgin pulp. Nowadays, new four-year-old pulp is used instead of ground pulp, and its added value is crystallized. The recycling of used paper is not only important as a raw material measure (in terms of energy, it is 115 to 1/8 of the energy cost of ground pulp and kraft pulp, so it is also effective as an energy saving measure. Recitation,
The merits of deinking waste paper are significant from the perspective of urban waste countermeasures.

Recently, the adhesive strength of paper and ink has improved due to printing technology, printing method, sharpening of printing ink components, etc. As a result, it has become increasingly difficult to remove ink from paper. Under these circumstances, it has become difficult to obtain recycled paper with a high degree of whiteness using conventionally known removers.

In order to remove ink and other impurities from used paper, alkalis such as sodium hydroxide, sodium silicate, sodium carbonate, and sodium phosphate, hydrogen peroxide, hypomedullary salt, hypochlorite, etc. have traditionally been used to remove ink and other impurities from waste paper. Marked white garri, EDTA,
DTPA, NTA.

Chemicals such as gold ion inhibitors such as 5TPP are used, or are used together with these agents in de-dusting agents for waste paper, such as flukylbenzenesulfone'-), anionic surfactants such as kill sulfate, Q-olefin sulfone), cyfurkylsulfosuccinate, higher fatty acid salts, higher alcohol ethylene oxide adducts, furkylphenol ethylene oxide adducts, fatty acid ethylene oxide adducts, Nonionic surfactants such as fatty acid amide ethylene oxide adducts, polypropylene glycol ethylene oxide adducts, ethylene oxide adducts of fats and oils, higher alcohol ethylene oxide propylene oxide (block or random adducts), amine oxides, flukylbequin, etc. In addition, by blending these chemical substances with specific organic/inorganic builders, organic solvents, etc., the effect can be increased and the deinking efficiency in the rotation process can be increased. However, it is not necessarily possible to satisfy the requirement of obtaining an old-growth ie with a fair degree of whiteness.

13iLt has the disadvantage that the fatty acids and stones that have excellent ink-collecting properties in the flotation process have very low foaming properties in the flotation process, and that the ink that aggregates and floats cannot be removed sufficiently. It's ℃.

In addition, although the previously known interfacial viscous agents for deinking have sufficient foaming properties and ink removal properties from paper in the flotation process, they have weak ink collection properties and are present on and within the foam layer. It has the disadvantage that there is less ink to be removed, and that it is difficult to remove the ink floating in the pulp suspension from the yarn together with the foam layer. In this way, no chemical substance has been found that has the ability to remove ink from paper at the level of waste paper deterioration mI, foaming ability in the flotation process, and high ink collection ability. Deinking methods that use a combination of chemicals are common. However, although the release method e (L''C) using this compound is said to be effective to some extent, it is not necessarily a satisfactory method.

As a result of our earnest efforts to obtain a deinking agent that provides high deinking efficiency that can meet the demands of technological innovation, the present inventors have developed a compound selected from the group consisting of nonionic surfactants and anionic surfactants. The present inventors have discovered that the above objectives can be achieved by using a deinking agent for waste paper recycling whose essential components are a small amount of carbon dioxide and protein.

Nonionic surfactant binding or i% class 7 according to the present invention
alcohol ethylene oxide adduct, furkylphenol ethylene oxide adduct, fatty acid ethylene oxide adduct, fatty acid amide ethylene oxide adduct,
Examples of anionic surfactants include ethylene oxide adducts of fats and oils, higher alcohol ethylene oxide propylene oxide (block or random) adducts, furkylbenzene sulfonate, furkyl sulfate,
Examples include furkyl ether sulfate, α-olefin sulfonate, difurkyl sulfosuccinate, and higher fatty acid salts.

Proteins according to the present invention include flutumin, globulin,
Glusolin, glolamin, phosphoprotein negative, -second induced protein,
Examples include secondary induced proteins. Specifically, blood (Il
f-fulbumin, lactalbumin, egg white fulbugine, myogun, leucosin (hereinafter referred to as leucosin), serum globulin, β-lactoglobulin, lysozyme, myosin,
Edestin, insulin, fibrinogun, thyroglobulin (more than globulin, glutenin, oryzenin)
gluzoline), cli7dine, hordein, zein (
Prolamin, casein, bigulin, vitellinin,
Examples include phosvitin (phosphoprotein), prothian, metaprotein, denatured protein negative (secondary induced protein), -primary glothiose, secondary flotoose, peptone, and benotide (four secondary proteins in total).

Nonionic surfactants and ionic surfactants have excellent ink release properties from waste paper, a certain degree of foaming properties, and ink collection properties, and can be used alone or When used in combination of two or more, a certain degree of deinking effect is exhibited, but when protein is further present in the present invention or the proposed ray 5, even more excellent deinking performance is exhibited.

The method of adding the deinking agent of the present invention is to add at least one compound from the group consisting of nonionic surfactants and anionic surfactants to the waste paper disintegration process. preferable. Protein can be added in any of the waste paper disintegration process, aging whitening process, or flotation process.
3. In other words, if the protein is added before the 70-year period, the expected effect will be achieved.

The present invention also provides a method of simultaneously adding at least one compound selected from the group consisting of a nonionic surfactant and an anionic surfactant and a protein to the waste paper disintegration process; It also provides a method of adding at least one compound selected from the group consisting of non-ionic surfactants and ionic surfactants to the composition, and adding proteins to the aging process or the 70-day process, respectively. be.

Nonionic surfactant and/or anionic surfactant Δ
The amount of ri used is 0.04-1.5% based on the raw material waste paper.
Preferably, the R1α range is 0.06 to 0.5i%.

If the amount used is less than 0.04%, the ink releasability from waste paper, the collection of peeled floating ink, and the foaming performance of the rotator strain are insufficient. 1.5 quintillion%
If the number is higher than 1, the ink dispersibility in the waste paper disintegration process is strong, and the ink removal rate in the 70-station process is insufficient. Furthermore, in the flotation process, foams are violently discharged, resulting in a phenomenon that the yield of heptalulose fibers is poor.

The amount of protein in the stool is i (0.005 to 1.
2i amount %, preferably in the range of 0.05 to 0.5 dish amount %. If the usage amount is less than 0.005%,
If protein has excellent ink collection properties and the amount is 5 or more in 1.2, when used in the waste paper 1'M stone process, the dispersibility of the ink will be 1 to 100%, so the removal rate in the process will be lower. 4ζLv ↑ because it is insufficient and has a high resistance to additives.
Not desirable.

In carrying out the present invention, additives such as fatty acids, polymers, oligomers, solvents, acids, alkalis, etc. may be added that may impair the effects of the present invention.

Hereinafter, the present invention will be explained more specifically in Example r (11L [i)], but the present invention is not limited to these Examples.

In order to evaluate the deinking performance, a method was used to determine the whiteness of the recycled valve seat (colorimetric color difference 6[in, number of remaining ink (image analysis equipment x 126)].

In the example song, recovered ηN waste paper was placed in 2 x 5 pieces by Shun Hosono, and its feet were placed in a tabletop cabinet, and water, 1.5% sodium aqueous dispersion (relative to the raw material waste paper), and silicic acid were added thereto. Soda No. 3 (used paper as raw material) 4.5%, 30% hydrogen peroxide (used paper as raw material) 1.0
%, deoxidizing agent (surfactant, protein a) was added [fixed chain (
Additives are as per Table 1), directly from pulp (15%, 60°C
After leaving the island for 20 minutes, it was aged at 45°C for 90 minutes. Then water? : In addition, dilute pulp & BW to 1.0%,
Flotation treatment was performed at 40° C. for 10 minutes. Calcium chloride was added at 1.0% per used paper only when protein was used as a deinking agent. After reducing the Pal7 slurry after flotation to 6%, add water to 1%
The mixture was diluted to a threshold and a pulp sheeter was prepared in a TAPPI pulp machine.

Table 1 shows the evaluation results for the removal of publicity.

Example 2 After shredding waste newspaper recovered in cloth into 2 x 5 f lint, put the certain M into a tabletop disintegrator, and add water and sodium hydroxide A (
1.0% (based on raw material used paper), 3.0% (based on raw material waste paper), 30% hydrogen peroxide (based on raw material waste paper) 1.0%
A fixed amount of defaming agent (surfactant, protein y!L)'kFr was added (time of addition is according to Table 2), pulp threshold was 5%, and the mixture was disintegrated at 60°C for 20 minutes, and then aged at 60°C for 90 minutes. Add the drained water to dilute the Parno threshold to 1.0% and bring it to 30℃? 70 cheeshon treatments were performed for 10 minutes.

When using protein as a deinking agent, 4. Calcium chloride was added at 1.0% based on the amount of used paper. After concentrating the pulp slurry after flotation to 15% linearity, water was added to
Dilute the valve seat to fF-HJ using TAPPI sheet machine V.

The evaluation results of deinkability are shown in Table 2 J0 Procedural amendment (voluntary) December 5, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1 Indication of the case Patent application No. 1983-95199 2 Name of the invention Ink agent 3 Relationship with the case of the person making the amendment Patent applicant (0911 Kao Soap Co., Ltd. 4 Detailed explanation of the invention column 6 of the agent specification Contents of the amendment (1) Specification page 6 line 9 “Higher fatty acid salt ” Insert the following statement after “

Claims (1)

[Scope of Claims] t. A defrosting agent for raw waste paper, which contains a nonionic surfactant and/or anionic surfactant and protein as essential components. 2. A patent with 1ai or 2 or more traced from l + = consisting of protein or flutumin, globulin, glutelin, prolamin, neighboring white matter, -secondary visiting protein and second visiting protein - 1"J seeking "Deinking agent 1 for waste paper recycling as described in item 1".