JPS6297993A - Erasion of fluorescent reaction in old paper - Google Patents

Erasion of fluorescent reaction in old paper

Info

Publication number
JPS6297993A
JPS6297993A JP60233388A JP23338885A JPS6297993A JP S6297993 A JPS6297993 A JP S6297993A JP 60233388 A JP60233388 A JP 60233388A JP 23338885 A JP23338885 A JP 23338885A JP S6297993 A JPS6297993 A JP S6297993A
Authority
JP
Japan
Prior art keywords
waste paper
erasion
fluorescent
fluorescent reaction
reaction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60233388A
Other languages
Japanese (ja)
Inventor
冨士本　茂男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujimoto Pollcon Co Ltd
Original Assignee
Fujimoto Pollcon Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujimoto Pollcon Co Ltd filed Critical Fujimoto Pollcon Co Ltd
Priority to JP60233388A priority Critical patent/JPS6297993A/en
Publication of JPS6297993A publication Critical patent/JPS6297993A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Landscapes

  • Paper (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、故紙中に含まれた螢光染料を消去する方法に
関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for erasing fluorescent dyes contained in waste paper.

〈従来技術〉 紙の製造工程において色調を整える必要性から螢光染料
を使用する場合が度々生じる。この螢光染料を使用した
紙が故紙として再生される場合、通常の処理方法では螢
光染料を消去できず、特に再生された紙が衛生紙あるい
は食品関係などの分野に使用される場合には甚だ間層が
生じるため、多くの人手にたよって選別しているのが現
状である。<Prior Art> Fluorescent dyes are often used in the paper manufacturing process due to the need to adjust the color tone. When paper that uses this fluorescent dye is recycled as waste paper, the fluorescent dye cannot be removed using normal processing methods, and the problem is especially severe when the recycled paper is used in sanitary paper or food-related fields. Due to the formation of interlayers, the current situation is that many people are required to sort the materials.

〈発明の目的〉 本発明は以上の実情に鑑み、螢光染料を含む故紙から螢
光反応を効果的に消去する方法を提供することを目的と
している。<Object of the Invention> In view of the above circumstances, an object of the present invention is to provide a method for effectively eliminating fluorescent reaction from waste paper containing fluorescent dye.

〈発明の構成〉 本発明で提供された故紙中の螢光反応消去法の要旨は次
の如くである。すなわち、パルパーなどで離解された故
紙を、水酸化ナトリウム溶液にてそのｐＨを１０以上に
調整し、次いで次亜塩素酸ナトリウム溶液を有効塩素の
０．８％以上添加し、常温から６０℃以内の温度下で貯
留することを特徴としている。<Structure of the Invention> The gist of the method for eliminating fluorescence reaction in waste paper provided by the present invention is as follows. That is, waste paper that has been disintegrated with a pulper is adjusted to a pH of 10 or more with a sodium hydroxide solution, then a sodium hypochlorite solution of 0.8% or more of available chlorine is added, and the temperature is within 60°C from room temperature. It is characterized by being stored at a temperature of .

〈実施例〉 次に本発明の要旨の理解を容易ならしめるため、本発明
の消去法による試験結果について説明する。<Example> Next, in order to facilitate understanding of the gist of the present invention, test results using the elimination method of the present invention will be explained.

試験は、先ず２ｃｍＸ２ｃｍ角に切断された螢光染料を
含む故紙を濃度約１０％になるようにパルパーで離解し
、これを水酸化ナトリウム溶液に対し故紙１％、次亜塩
素酸ナトリウム溶液に対し故紙１％の割合で加え、これ
を３０℃、４０’Ｃ，６０℃の各温度下で貯留したとこ
ろ、次表ような結果となった。尚、次表に記入された数
字は、無明数である螢光染料を１００とした場合の比較
値であり、試験された故紙の螢光反応に対する処理前の
比較値は６４．５であった。In the test, waste paper containing fluorescent dye cut into 2 cm x 2 cm squares was disintegrated with a pulper to a concentration of approximately 10%, and the waste paper was mixed in a sodium hydroxide solution at 1%, and in a sodium hypochlorite solution. When waste paper was added at a rate of 1% and stored at temperatures of 30°C, 40'C, and 60°C, the results shown in the table below were obtained. The numbers entered in the following table are comparative values when the fluorescent dye, which is an unknown number, is taken as 100, and the comparative value for the fluorescent reaction of the waste paper tested before treatment was 64.5. .

以上の試験結果により、螢光反応に対する比較値がＮＢ
ＫＰで７．６、ＬＢＫＰで７．９及び分析用口紙で８．
３であることを勘案すれば。Based on the above test results, the comparative value for fluorescence reaction is NB.
7.6 for KP, 7.9 for LBKP and 8. for analytical slip.
Considering that it is 3.

比較値が１０以下では螢光反応はないものと解釈され、
この結果、４０℃の温度下で貯留した場合には６時間、
更に加温して６０℃の温度下で貯留した場合には３時間
程度で螢光反応が消去できることが判明した。If the comparison value is less than 10, it is interpreted that there is no fluorescent reaction.
As a result, when stored at a temperature of 40℃, for 6 hours,
It was found that when the sample was further heated and stored at a temperature of 60°C, the fluorescent reaction could be eliminated in about 3 hours.

〈発明の効果〉 したがって１本発明に係る故紙中の螢光反応消去法によ
れば、螢光染料を含む故紙から螢光反応を効果的に消去
することができるため、故紙再生業界において得られる
利益は膨大と考えられます。<Effects of the Invention> Therefore, 1. According to the method for eliminating the fluorescent reaction in waste paper according to the present invention, the fluorescent reaction can be effectively eliminated from waste paper containing fluorescent dye, so that it can be obtained in the waste paper recycling industry. The benefits can be considered huge.

Claims (1)

【特許請求の範囲】[Claims] パルパーなどで離解された故紙を、水酸化ナトリウム溶
液にてそのｐＨを１０以上に調整し、次いで次亜塩素酸
ナトリウム溶液を有効塩素の０．８％以上添加し、常温
から６０℃以内の温度下で貯留することを特徴とする故
紙中の螢光反応消去法。The pH of waste paper disintegrated with a pulper etc. is adjusted to 10 or more with a sodium hydroxide solution, then a sodium hypochlorite solution of 0.8% or more of available chlorine is added, and the temperature is within 60°C from room temperature. A method for eliminating fluorescence reaction in waste paper, which is characterized by storage at the bottom.
JP60233388A 1985-10-21 1985-10-21 Erasion of fluorescent reaction in old paper Pending JPS6297993A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60233388A JPS6297993A (en) 1985-10-21 1985-10-21 Erasion of fluorescent reaction in old paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60233388A JPS6297993A (en) 1985-10-21 1985-10-21 Erasion of fluorescent reaction in old paper

Publications (1)

Publication Number Publication Date
JPS6297993A true JPS6297993A (en) 1987-05-07

Family

ID=16954310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60233388A Pending JPS6297993A (en) 1985-10-21 1985-10-21 Erasion of fluorescent reaction in old paper

Country Status (1)

Country Link
JP (1) JPS6297993A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0491284A (en) * 1990-08-03 1992-03-24 Honshu Paper Co Ltd Method for eliminating fluorescent reaction in waste paper
JPH0533279A (en) * 1991-07-29 1993-02-09 Sanyo Kokusaku Pulp Co Ltd Method for eliminating fluorescence in waste paper

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5598990A (en) * 1979-01-19 1980-07-28 Voith Gmbh J M Regeneration of waste paper
JPS57191387A (en) * 1981-05-18 1982-11-25 Kogyo Gijutsuin Multi-stage bleaching of mixed regenerated pulp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5598990A (en) * 1979-01-19 1980-07-28 Voith Gmbh J M Regeneration of waste paper
JPS57191387A (en) * 1981-05-18 1982-11-25 Kogyo Gijutsuin Multi-stage bleaching of mixed regenerated pulp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0491284A (en) * 1990-08-03 1992-03-24 Honshu Paper Co Ltd Method for eliminating fluorescent reaction in waste paper
JPH0533279A (en) * 1991-07-29 1993-02-09 Sanyo Kokusaku Pulp Co Ltd Method for eliminating fluorescence in waste paper

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