JPH0280683A - Ink-removing treatment of waste paper - Google Patents
Ink-removing treatment of waste paperInfo
- Publication number
- JPH0280683A JPH0280683A JP63203827A JP20382788A JPH0280683A JP H0280683 A JPH0280683 A JP H0280683A JP 63203827 A JP63203827 A JP 63203827A JP 20382788 A JP20382788 A JP 20382788A JP H0280683 A JPH0280683 A JP H0280683A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- waste paper
- cellulase
- enzyme
- paper
- 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.)
- Granted
Links
- 239000010893 paper waste Substances 0.000 title claims abstract description 23
- 108090000790 Enzymes Proteins 0.000 claims abstract description 34
- 102000004190 Enzymes Human genes 0.000 claims abstract description 34
- 229940088598 enzyme Drugs 0.000 claims abstract description 33
- 108010059892 Cellulase Proteins 0.000 claims abstract description 17
- 229940106157 cellulase Drugs 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 239000002761 deinking Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 13
- 239000000835 fiber Substances 0.000 abstract description 11
- 108010059820 Polygalacturonase Proteins 0.000 abstract description 4
- 108010093305 exopolygalacturonase Proteins 0.000 abstract description 4
- 229940059442 hemicellulase Drugs 0.000 abstract description 2
- 108010002430 hemicellulase Proteins 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229920001131 Pulp (paper) Polymers 0.000 description 7
- 230000000593 degrading effect Effects 0.000 description 5
- 108010047754 beta-Glucosidase Proteins 0.000 description 4
- 102000006995 beta-Glucosidase Human genes 0.000 description 4
- 238000005188 flotation Methods 0.000 description 4
- 229920002488 Hemicellulose Polymers 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 229920001277 pectin Polymers 0.000 description 3
- 239000001814 pectin Substances 0.000 description 3
- 235000010987 pectin Nutrition 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 108010081495 driselase Proteins 0.000 description 2
- 230000002255 enzymatic effect Effects 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000282693 Cercopithecidae Species 0.000 description 1
- 101710166469 Endoglucanase Proteins 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 241000854711 Shinkai Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 229940053200 antiepileptics fatty acid derivative Drugs 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、酵Xt−用い友古紙の脱墨処理法に関するも
のである。さらに詳しくは、本発明はセルロース分解酵
素又はこれとヘミセルロース分解酵素、ペクチン分解酵
素、β−グルコシダーゼ等の多糖類分解酵素の併用によ
る処理工程を脱墨処理工程の前に設けることによシ、よ
シ白色度の高い高品位のパルプを製造する方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for deinking Yuko paper using yeast Xt. More specifically, the present invention provides a treatment step using a cellulose degrading enzyme or a combination of this and a polysaccharide degrading enzyme such as a hemicellulose degrading enzyme, a pectin degrading enzyme, or a β-glucosidase, before the deinking treatment step. The present invention relates to a method for producing high-quality pulp with high whiteness.
(従来の技術)
従来の古紙の脱墨処理法は、アルカリおよび界面活性剤
を含む脱墨処理によシインキを剥離する工程とフローテ
ーション法、洗浄法、あるいはその折衷法によりインキ
を除去する工程とから成る。(Prior art) The conventional deinking treatment method for used paper consists of a step of removing ink by a deinking treatment containing an alkali and a surfactant, and a step of removing the ink by a flotation method, a washing method, or a combination thereof. It consists of
すなわち、水酸化ナトリウムや炭酸ナトリウム等のアル
カリが繊維とインキとの間を膨潤させ結合を弱め、イン
キの剥離を容易にし、又脱墨剤は、繊維とインキとの間
へアルカリの浸透を促し、さらにインキや油分を水中に
安定化させて繊維への再吸着を防止する。そして、70
−テーシヨン法、洗浄法、あるいはその折衷法により剥
離し之イン:?ヲ除去するものである。In other words, alkali such as sodium hydroxide or sodium carbonate swells the bond between the fiber and ink, weakening the bond and making it easier to remove the ink, and the deinking agent promotes the penetration of alkali between the fiber and ink. It also stabilizes ink and oil in water to prevent them from being re-adsorbed onto the fibers. And 70
- Peeling by washing method, washing method, or a combination thereof: ? It is to remove it.
しかし、近年、コンピューターを用いた印刷技術の進歩
によシ新聞をはじめ、オフセット印刷が増加してきた。However, in recent years, due to advances in printing technology using computers, offset printing has increased, including for newspapers.
このオフセット印刷に用いるオフセットインキは、凸版
インキに比べ含まれる樹脂分が多く、これが空気酸化を
受けて重合し、繊維にかたく接着する九め、インキが剥
離しKくい。また、イン中粒子は、親油性に乏しいため
、気泡への付着が悪くフローテーション法では除去しに
くい。The offset ink used for this offset printing contains a larger amount of resin than the letterpress ink, and this resin polymerizes when oxidized in the air and adheres tightly to the fibers, making it difficult for the ink to peel off. In addition, since the particles in the ink have poor lipophilicity, they do not adhere well to air bubbles and are difficult to remove by the flotation method.
このことは、近年の新開用紙の軽量化に伴う相対的なイ
ンキ量の増加とともに脱インキ性が低下し、色土が9が
悪くなる原因となっておシ、そのためよシよい脱墨法が
望まれている。This is due to the fact that as the relative amount of ink increases due to the weight reduction of Shinkai paper in recent years, the deinking performance decreases and the colored soil becomes worse. desired.
例えば、特開昭59−9299号公報には、界面活性剤
及びセルラーゼを含有する脱墨剤が提案されているが、
用いられている酵素は、−般に入手し難いアルカリセル
ラーゼであシ、脱墨処理にコストがかかるという欠点を
有する。For example, JP-A-59-9299 proposes a deinking agent containing a surfactant and cellulase.
The enzyme used is alkaline cellulase, which is generally difficult to obtain, and has the disadvantage that the deinking process is expensive.
また、特開昭63−59494号公報には、アルカリ耐
性セルラーゼを用いる古紙の脱インキ方法が提案されて
いるが、この方法は脱墨処理と同時あるいは脱墨処理後
に酵素処理を行う之め、添加薬品の濃度が高いとセルラ
ーゼを失活させるおそれがある。Furthermore, Japanese Patent Application Laid-Open No. 63-59494 proposes a method for deinking waste paper using alkaline-resistant cellulase, but this method requires enzymatic treatment to be performed at the same time or after the deinking treatment. If the concentration of added chemicals is high, there is a risk of inactivating cellulase.
さらに、特公昭57−55320号公報(U8x025
23号)は、紙シートに酵素処理を実施している例で、
紙シート製造工程中の仕上げ乾燥前の湿った紙クエプに
対し、セルラーゼ酵素複合剤の希薄水溶液を塗布するこ
とによ多使用後その紙を廃棄する際に水に濡らすことに
よシ紙が容易にかつ速やかに分解されるものであるが、
紙の使用中に酵素が失活し易く、また酵素蛋白によシ紙
が腐食され易く、強度劣化を引き起こす等の不都合があ
る。Furthermore, Japanese Patent Publication No. 57-55320 (U8x025
No. 23) is an example in which a paper sheet is subjected to enzyme treatment.
By applying a dilute aqueous solution of a cellulase enzyme complex to damp paper sheets before finishing and drying during the paper sheet manufacturing process, paper can be easily cleaned by soaking it in water when disposing of the paper after repeated use. Although it is decomposed quickly and quickly,
There are disadvantages such as the enzyme tends to be deactivated during use of the paper, and the paper tends to be corroded by the enzyme protein, causing deterioration in strength.
(発明が解決しようとする課題)
本発明は、少なくとも1種類以上のセルラーゼを含む酵
素類を用いて古紙の酵素処理を行うことにより、従来法
では、充分剥離出来なかつ之インキの剥離を容易にし、
白色度の高い高品位の脱墨パルプ金得ることの出来る古
紙の脱墨処理法を提供するものである。(Problems to be Solved by the Invention) The present invention makes it easier to remove ink that could not be removed sufficiently with conventional methods by enzymatically treating waste paper using enzymes containing at least one type of cellulase. ,
The present invention provides a method for deinking waste paper that can yield high quality deinked pulp gold with high whiteness.
(課題を解決する友めの手段)
本発明は、パルプ濃度3〜10%の古紙スラリーに少な
くともセルラーゼを含む酵素を添加して酵素処理し、次
いで脱墨剤処理することを特徴とする古紙の脱墨処理法
である。(Friendly Means for Solving the Problems) The present invention is a waste paper slurry having a pulp concentration of 3 to 10%, which is treated with an enzyme containing at least cellulase, and then treated with a deinking agent. This is a deinking processing method.
古紙から白色度の高い脱墨パルプを製造する几めには、
従来法では、除去できなかったインキ′f、##維から
さらに剥離することが必要であるが、紙の繊維成分は、
セルロース、ヘミセルロース、ペクチン、リグニン等で
あシ実際にはこれらの成分が複雑に結合している。The method of producing deinked pulp with high whiteness from waste paper is as follows:
In the conventional method, it is necessary to further peel off the ink 'f and ## fibers that could not be removed, but the fiber components of paper
Cellulose, hemicellulose, pectin, lignin, etc. In reality, these components are bound together in a complex manner.
本発明はこれらの繊維成分のうち、セルロースを分解す
ることができるセルラーゼを古紙パルプに作用させ、パ
ルプ中の各成分間の結合を緩和することにより繊維に付
着しているインキの剥at容易にするものであり、その
結果、次の工程の脱墨剤処理がより効果的に行われるよ
うになり白色度の高い脱墨パルプ金得ることが可能にな
る。The present invention allows cellulase, which can decompose cellulose among these fiber components, to act on waste paper pulp to relax the bonds between each component in the pulp, thereby making it easier to remove the ink adhering to the fibers. As a result, the deinking agent treatment in the next step can be performed more effectively, making it possible to obtain deinked pulp gold with a high degree of whiteness.
本発明における酵素処理は、セルラーゼを単独で用いて
もよいが他の多糖類分解酵素と併用してヘミセルロース
、ペクチン等を分解することにより効果はさらに向上す
る。In the enzyme treatment of the present invention, cellulase may be used alone, but the effect is further improved by using it in combination with other polysaccharide degrading enzymes to decompose hemicellulose, pectin, etc.
本発明における酵素処理は簿累が活性を示す−および温
度で行なう必要がある。即ち、5.5〜7.0の範囲内
の−及び20S70℃の範囲内の温度で酵素処理を行な
うのが好ましい。The enzyme treatment in the present invention needs to be carried out at a temperature that exhibits activity. That is, it is preferable to carry out the enzyme treatment at a temperature within the range of 5.5 to 7.0°C and 20S to 70°C.
酵素類としては、セルラーゼ又はセルラーゼとへミセル
ラーゼ、ペクチナーゼ、β−グルコシダーゼ等のセルラ
ーゼ以外の繊維成分を分解しうる多糖類分解酵素を用い
ればよく、動植物、微生物界に広く分布しているものを
使用でさる。As the enzymes, polysaccharide-degrading enzymes that can decompose fiber components other than cellulase, such as cellulase or cellulase and hemicellulase, pectinase, and β-glucosidase, may be used, and those widely distributed in the animal, plant, and microbial worlds may be used. It's a monkey.
市販の酵素としては、5erva製のセルラーゼTC,
協和醗酵工業株式会社製のドリセラーゼ、Fluka社
製のペクチナーゼ(Fungal origin )、
シグマ社製のβ−グルコシダーゼ等を挙げることができ
る。Commercially available enzymes include Cellulase TC manufactured by 5erva,
Driselase manufactured by Kyowa Hakko Kogyo Co., Ltd., pectinase manufactured by Fluka (Fungal origin),
Examples include β-glucosidase manufactured by Sigma.
本発明における酵素処理は脱墨剤処理前の工程で行うこ
とが望筐しく、その場合、酵素添加量は、絶乾古紙重量
当シ0.01〜1重量S好ましくは0.05〜0.5重
量当である。酵素添加量が0.01重量%未満では十分
な脱墨効果が得られなくなシ、一方1重量%を越える量
を添加してもよいが脱墨効果のより以上の向上は認めら
れない。The enzyme treatment in the present invention is preferably carried out in a step before the deinking agent treatment, and in that case, the amount of enzyme added is 0.01 to 1 weight S based on the weight of bone dry waste paper, preferably 0.05 to 0. 5 weight per unit. If the amount of the enzyme added is less than 0.01% by weight, a sufficient deinking effect cannot be obtained; on the other hand, although it may be added in an amount exceeding 1% by weight, no further improvement in the deinking effect will be observed.
また、゛酵素を添加する古紙スラリー濃度は3〜10重
量%、好ましくは6.5〜5重量%である。スラリー濃
度が3重:tX未満では酵素が希釈されてしまうため効
果が少なく、一方10重量%を越えると酵素がパルプス
ラリー全体に拡散しにくくなシ、酵素を均一に分散させ
るのが困難になるので好ましくない。The concentration of the waste paper slurry to which the enzyme is added is 3 to 10% by weight, preferably 6.5 to 5% by weight. Threefold slurry concentration: If the concentration is less than tX, the enzyme will be diluted and the effect will be low, while if it exceeds 10% by weight, it will be difficult for the enzyme to diffuse throughout the pulp slurry and it will be difficult to disperse the enzyme uniformly. So I don't like it.
さらに、酵素処理の時間は0.5〜5時間、好ましくは
1〜4時間でおる。処理時間が0.5時間未満では酵素
の効果が充分発揮されず、一方5時間を越えても、その
効果は頭打ちとなる。Further, the enzyme treatment time is 0.5 to 5 hours, preferably 1 to 4 hours. If the treatment time is less than 0.5 hours, the effect of the enzyme will not be fully exhibited, while if it exceeds 5 hours, the effect will reach a plateau.
本発明において使用される古紙としては、−般にいわれ
る古紙はすべて用いることができ、新聞、雑誌、広告、
ちらし等の古紙をあげることができる。これらの古紙全
離解する場合、古紙濃度は3〜10%が適当であシ、こ
の際酵素処理を行う場合の−を考慮して中性乃至弱酸性
の脱墨剤を絶乾古紙重i%当シ0.07〜G、2重量%
添加して離解するのも良い。The waste paper used in the present invention can be any of the commonly used waste papers such as newspapers, magazines, advertisements, etc.
You can give away used paper such as leaflets. When all of these waste papers are disintegrated, the appropriate waste paper concentration is 3 to 10%.At this time, taking into consideration the possibility of enzymatic treatment, a neutral to weakly acidic deinking agent is added to i% of the weight of the bone-dry waste paper. This 0.07~G, 2% by weight
It is also good to add it and disintegrate it.
(実施例)
以下、実施例により本発明の詳細な説明するが、本発明
はこれに限定されるものではない。(Examples) Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited thereto.
尚、薬品添加量は対絶乾古紙重量当夛の%で示す。The amount of chemicals added is expressed as a percentage of the absolute dry waste paper weight.
実施例及び比較例
新聞古紙をI S2 aa四方に裁断後離解し、濃度3
.5%の古紙スラリーとした。この古紙スラリーQpH
は5.5であった。古紙スラリーに各種酵素lr表1に
示す添加量で添加し、さらに2分間離解し友。Examples and Comparative Examples Waste newspaper was cut into I S2 aa squares and then disintegrated, and the density was 3.
.. It was made into a 5% waste paper slurry. This waste paper slurry QpH
was 5.5. Various enzymes were added to the waste paper slurry in the amounts shown in Table 1, and the mixture was further disintegrated for 2 minutes.
45℃で5時間静置し友後、水酸化ナトリウム0.5%
と古紙再生用脱墨剤として脂肪酸誘導体系のor−do
o(花王株式会社製)と陰イオン系のDI−370(花
王株式会社製)をそれぞれ0.36%、0.04%添加
し、2分間攪拌し友。40℃で30分間放置し友後、脱
水してパルプ濃度15%に調製し、次いで過酸化水素0
.3%、水酸化ナトリウム1.22%、珪酸ナトリウム
2.24%を添加し、55℃で2時間誤白金行つ九。After standing at 45℃ for 5 hours, add 0.5% sodium hydroxide.
and the or-do of fatty acid derivatives as deinking agents for waste paper recycling.
(manufactured by Kao Corporation) and anionic DI-370 (manufactured by Kao Corporation) were added at 0.36% and 0.04%, respectively, and stirred for 2 minutes. After being left at 40°C for 30 minutes, the pulp was dehydrated to a pulp density of 15%, and then treated with 0 hydrogen peroxide.
.. Add 3% sodium hydroxide, 1.22% sodium silicate, and 2.24% sodium silicate, and heat the platinum at 55°C for 2 hours.
その後、パルプ濃度が1Sになるように希釈し、40℃
で10分間フローテーション処理を行つ九。フローテー
ション処理後、パルプ濃度が15%になるまで濃縮した
。After that, the pulp was diluted to a concentration of 1S and heated to 40°C.
9. Perform flotation treatment for 10 minutes. After the flotation treatment, the pulp was concentrated until the pulp concentration was 15%.
再度パルプ濃度を1%濃度になるように希釈L、TAP
PIシートマシンにてパルプシー)を作製した。作製し
念バルブシートを用い、ノ1ンター白色度計によシ白色
度を、色度計によル明度全測定し友。又、101’
当りにある0、2重以上の未脱AM維の本数(以下、黒
ヒゲと称する)を測定し友。Dilute the pulp again to 1% concentration L, TAP
Pulp sheet) was produced using a PI sheet machine. Using the prepared valve seat, measure the whiteness using an international whiteness meter and the brightness using a color meter. Also, 101'
Measure the number of 0, 2 or more undetachable AM fibers (hereinafter referred to as black whiskers) in each area.
その結果を表1に示す。なお、ここで用いた酵素はセル
ラーゼT O(Berva社)、ドリセラーゼ(協和発
酵株式会社)、ペクチナーゼ(yluka社)、β−グ
ルコシダーゼ(シグマ社製)である。The results are shown in Table 1. The enzymes used here were cellulase TO (Berva), driselase (Kyowa Hakko Co., Ltd.), pectinase (Yluka), and β-glucosidase (Sigma).
表1から明らかな如く、脱墨処理にセルラーゼを用いる
ことにより、従来法(酵素処理なし)に比して良質の脱
墨パルプが得られており、さらに、セルラーゼと他の多
糖類分解酵素を併用することにより、よシ良質の脱墨パ
ルプが得られており、本発明の効果が確認された。As is clear from Table 1, by using cellulase for deinking treatment, a deinked pulp of better quality can be obtained compared to the conventional method (without enzyme treatment). When used in combination, deinked pulp of good quality was obtained, confirming the effect of the present invention.
表 1
(発明の効果)
本発明の実施によって黒ヒゲが少なく、白色度の高い高
品位の脱墨パルプを得ることが可能である。Table 1 (Effects of the Invention) By carrying out the present invention, it is possible to obtain high-quality deinked pulp with few black whiskers and high whiteness.
Claims (1)
1種類のセルラーゼを含む酵素を添加して酵素処理し、
次いで脱墨剤処理することを特徴とする古紙の脱墨処理
法。1. Enzyme treatment by adding an enzyme containing at least one type of cellulase to waste paper slurry with a pulp concentration of 3 to 10%,
A method for deinking waste paper, which is then treated with a deinking agent.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20382788A JP2805313B2 (en) | 1988-08-18 | 1988-08-18 | Deinking treatment of used paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20382788A JP2805313B2 (en) | 1988-08-18 | 1988-08-18 | Deinking treatment of used paper |
Publications (2)
Publication Number | Publication Date |
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JPH0280683A true JPH0280683A (en) | 1990-03-20 |
JP2805313B2 JP2805313B2 (en) | 1998-09-30 |
Family
ID=16480367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20382788A Expired - Fee Related JP2805313B2 (en) | 1988-08-18 | 1988-08-18 | Deinking treatment of used paper |
Country Status (1)
Country | Link |
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JP (1) | JP2805313B2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03882A (en) * | 1989-05-16 | 1991-01-07 | Korea Res Inst Chem Technol | Regenerating method by biochemical deinking of waste paper |
US5314637A (en) * | 1990-07-24 | 1994-05-24 | Showa Denko K.K. | Detergent comprising isolated cellulase from bacillus ferm bp-3431 or a mutant strain thereof, surfactant and builder |
US5370770A (en) * | 1992-11-09 | 1994-12-06 | The Mead Corporation | Method for deinking printed waste paper using soybean peroxidase |
JPH08120580A (en) * | 1994-10-20 | 1996-05-14 | Honshu Paper Co Ltd | Deinking of printed waste paper |
JPH08127989A (en) * | 1994-10-28 | 1996-05-21 | Honshu Paper Co Ltd | Method for deinking old printed paper |
US5620565A (en) * | 1994-06-29 | 1997-04-15 | Kimberly-Clark Corporation | Production of soft paper products from high and low coarseness fibers |
WO1998006892A1 (en) * | 1996-08-16 | 1998-02-19 | International Paper Company | Enzymatic freeness enhancement |
CN1086215C (en) * | 1994-06-29 | 2002-06-12 | 金伯利-克拉克环球有限公司 | Production of soft paper products from old newspaper |
US6426200B1 (en) | 1994-09-15 | 2002-07-30 | University Of Georgia Research Foundation, Inc. | Methods for enzymatic deinking of waste paper |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1325977A4 (en) | 2000-09-14 | 2004-04-14 | Meiji Seika Kaisha | Method of deinking waste paper by using cellulase without lowering paper strength and method of evaluating the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51147603A (en) * | 1975-06-13 | 1976-12-18 | Kiyosuke Yoshikawa | Process for reclaiming pulp without pollution from used paper |
JPS63145495A (en) * | 1986-09-22 | 1988-06-17 | ラ セルロース デュ パン | Treatment of papermaking pulp by enzyme compound |
-
1988
- 1988-08-18 JP JP20382788A patent/JP2805313B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51147603A (en) * | 1975-06-13 | 1976-12-18 | Kiyosuke Yoshikawa | Process for reclaiming pulp without pollution from used paper |
JPS63145495A (en) * | 1986-09-22 | 1988-06-17 | ラ セルロース デュ パン | Treatment of papermaking pulp by enzyme compound |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03882A (en) * | 1989-05-16 | 1991-01-07 | Korea Res Inst Chem Technol | Regenerating method by biochemical deinking of waste paper |
JPH049231B2 (en) * | 1989-05-16 | 1992-02-19 | ||
US5785809A (en) * | 1989-05-16 | 1998-07-28 | Krict | Biological de-inking method |
US5318905A (en) * | 1990-07-24 | 1994-06-07 | Showa Denko K.K. | Composition containing celluase from Bacillus Ferm BP-3431 or a mutant strain thereof, and paper pulp and method of using celluase to treat paper pulp slurry |
US5314637A (en) * | 1990-07-24 | 1994-05-24 | Showa Denko K.K. | Detergent comprising isolated cellulase from bacillus ferm bp-3431 or a mutant strain thereof, surfactant and builder |
US5370770A (en) * | 1992-11-09 | 1994-12-06 | The Mead Corporation | Method for deinking printed waste paper using soybean peroxidase |
US5620565A (en) * | 1994-06-29 | 1997-04-15 | Kimberly-Clark Corporation | Production of soft paper products from high and low coarseness fibers |
CN1086215C (en) * | 1994-06-29 | 2002-06-12 | 金伯利-克拉克环球有限公司 | Production of soft paper products from old newspaper |
US6426200B1 (en) | 1994-09-15 | 2002-07-30 | University Of Georgia Research Foundation, Inc. | Methods for enzymatic deinking of waste paper |
US6767728B2 (en) | 1994-09-15 | 2004-07-27 | University Of Georgia Research Foundation, Inc. | Composition for enzymatic deinking of waste paper |
JPH08120580A (en) * | 1994-10-20 | 1996-05-14 | Honshu Paper Co Ltd | Deinking of printed waste paper |
JPH08127989A (en) * | 1994-10-28 | 1996-05-21 | Honshu Paper Co Ltd | Method for deinking old printed paper |
WO1998006892A1 (en) * | 1996-08-16 | 1998-02-19 | International Paper Company | Enzymatic freeness enhancement |
US6066233A (en) * | 1996-08-16 | 2000-05-23 | International Paper Company | Method of improving pulp freeness using cellulase and pectinase enzymes |
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