JPH0814078B2 - Deinking agent - Google Patents
Deinking agentInfo
- Publication number
- JPH0814078B2 JPH0814078B2 JP22721688A JP22721688A JPH0814078B2 JP H0814078 B2 JPH0814078 B2 JP H0814078B2 JP 22721688 A JP22721688 A JP 22721688A JP 22721688 A JP22721688 A JP 22721688A JP H0814078 B2 JPH0814078 B2 JP H0814078B2
- Authority
- JP
- Japan
- Prior art keywords
- deinking
- pulp
- lipase
- sodium
- alkaline lipase
- 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.)
- Expired - Lifetime
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
- Paints Or Removers (AREA)
- Paper (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、新聞、雑誌、書籍、ちらし等の印刷古紙か
ら再生パルプを製造する際に用いられる脱墨剤に関す
る。TECHNICAL FIELD The present invention relates to a deinking agent used for producing recycled pulp from printed waste paper such as newspapers, magazines, books and leaflets.
従来の技術 製紙用パルプ原料の涸渇化に伴い、印刷古紙からパル
プを再生しこれを製紙に再利用することが古くから行わ
れている。印刷古紙を再生する場合、通常パルパーなど
の解離機が使用され、機械力で印刷古紙を解離しなが
ら、これにアルカリ薬品と脱墨剤および必要に応じて漂
白剤を作用させてインキを古紙から脱離させ、脱離イン
キをフローテーション方式、フローテーション／水洗折
哀方式、水洗方式のいずれかの方式でパルプスラリーか
ら分離する方法が採用されている。2. Description of the Related Art With the depletion of pulp raw materials for papermaking, it has long been practiced to recycle pulp from waste printed paper and reuse it for papermaking. When reusing printed waste paper, a disintegrator such as a pulper is usually used, and while dissociating the printed waste paper with mechanical force, an alkaline chemical, a deinking agent and, if necessary, a bleaching agent act on the waste paper to remove the ink from the waste paper. A method is adopted in which the ink is desorbed and the desorbed ink is separated from the pulp slurry by any one of a flotation method, a flotation / water washing method, and a water washing method.
また最近の古紙は、印刷物の美粧化、堅牢化、印刷作
業性の向上等の要求から、オフセットインキなどに見ら
れる様に、ビヒクル中に乾性油や石油樹脂、フェノール
樹脂等の熱硬化性樹脂を使用する事が多くなる傾向にあ
る。これらのビヒクルは熱や光で硬化する性質を有する
ため、紙とインキの付着力が強く脱インキしにくい傾向
にあり、従来のアルキルベンゼンスルホン酸塩等の陰イ
オン界面活性剤、高級アルコールエチレンオキシド付加
物等の非イオン界面活性剤、アミンオキシド等の両性イ
オン界面活性剤などの脱墨剤では、必ずしも高白色度の
再生紙を得ることが難かしい状況になっている。In addition, recently, used paper is a thermosetting resin such as drying oil, petroleum resin, phenol resin, etc. Tends to be used more often. Since these vehicles have the property of being hardened by heat or light, they tend to have strong adhesiveness between paper and ink and are difficult to deink. Conventional anionic surfactants such as alkylbenzene sulfonates and higher alcohol ethylene oxide adducts. With deinking agents such as nonionic surface active agents such as Hg and zwitterionic surface active agents such as amine oxides, it is always difficult to obtain recycled paper with high whiteness.
発明が解決しようとする課題 本発明は、特にオフセット印刷古紙に由来するインキ
を効率良く除去し、高品質の再生パルプを得ることので
きる脱墨剤を提供するものである。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention provides a deinking agent capable of efficiently removing ink derived from used offset printing waste paper to obtain high-quality recycled pulp.
発明の構成 本発明の脱墨剤は、アルカリリパーゼを含有すること
を特徴とする。Composition of the Invention The deinking agent of the present invention is characterized by containing an alkaline lipase.
以下、本発明についてさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail.
本発明に用いるアルカリリパーゼは、細菌、菌類等に
由来するもののうち、比較的高い至適pHをもつものであ
り、至適pHが8.0〜12.0、好ましくは8.1〜11.5のもので
ある。このようなアルカリリパーゼは、アルカリ領域に
おいても、中性もしくは酸性領域のリパーゼ活性の30％
以上の酸素活性を保持する。The alkaline lipase used in the present invention has a relatively high optimum pH among those derived from bacteria, fungi and the like, and has an optimum pH of 8.0 to 12.0, preferably 8.1 to 11.5. Such alkaline lipase has 30% of the lipase activity in the neutral or acidic region even in the alkaline region.
The above oxygen activity is maintained.
アルカリリパーゼとしては、例えば、種々の起源のア
ルカリリパーゼ培養液から、公知の方法すなわちアセト
ン、メタノール、エタノール等の有機溶媒による沈澱方
法、硫酸等による塩析法、DEAE−セルロース等のクロマ
トグラフィー法やゲル過法等により分画した粗酵素や
精製酵素などが使用できる。As the alkaline lipase, for example, from alkaline lipase culture solutions of various origins, known methods, that is, a precipitation method with an organic solvent such as acetone, methanol, and ethanol, a salting-out method with sulfuric acid, a chromatography method such as DEAE-cellulose, and the like. A crude enzyme or a purified enzyme fractionated by gel perfusion method or the like can be used.
本発明に使用される特に好ましいアルカリリパーゼと
して次のものが例示される。The following are examples of particularly preferred alkaline lipases used in the present invention.
（１）アスペルギルス オリザ（Aspergillus oryzae）
から遺伝子操作により産生されたアルカリリパーゼ（特
開昭62−272988号公報）。(1) Aspergillus oryzae
Alkaline lipase produced by genetic engineering from (JP-A-62-272988).
（２）サーモミセス（Thermomyces）属を含むフミコラ
（Humicola）属の菌株より産生されたアルカリリパーゼ
（特開昭62−68697号公報）。(2) An alkaline lipase produced from a strain of the genus Humicola including the genus Thermomyces (JP-A-62-68697).
この他、市販のものとして株式会社大阪細菌研究所製
オリパーゼ、東洋醸造株式会社製リパーゼLP、生化学工
業株式会社製アルカリ性リパーゼなどが挙げられる。In addition to these, commercially available products include Olipase manufactured by Osaka Bacterial Laboratory Co., Ltd., Lipase LP manufactured by Toyo Brewing Co., Ltd., and alkaline lipase manufactured by Seikagaku Corporation.
本発明はこれらアルカリリパーゼの酵素反応により、
特にオフセット印刷用インキ中のビヒクルに存在する乾
性油等の油脂を加水分解し、優れた脱墨効果を発揮する
が、更に界面活性剤を併用することにより一層優れた脱
墨性能を示すものである。The present invention, by the enzymatic reaction of these alkaline lipase,
In particular, it hydrolyzes oils and fats such as drying oil present in the vehicle in the offset printing ink, and exerts an excellent deinking effect, but by further using a surfactant in combination, it shows even better deinking performance. is there.
本発明で使用可能な界面活性剤は、陰イオン界面活性
剤、非イオン界面活性剤、両性イオン界面活性剤等の中
から選ばれる１種または２種以上である。The surfactant that can be used in the present invention is one or more selected from anionic surfactants, nonionic surfactants, zwitterionic surfactants and the like.
具体的には、高級脂肪酸塩、アルキルベンゼンスルホ
ン酸塩、α−オレフィンスルホン酸塩、高級アルコール
硫酸エステル塩、ジアルキルスルホコハク酸塩等の陰イ
オン界面活性剤；高級アルコールエチレンオキサイド付
加物、アルキルフェノールエチレンオキサイド付加物、
脂肪酸エチレンオキサイド付加物、脂肪酸アミド、脂肪
酸アミドエチレンオキサイド付加物、高級アルコールエ
チレンオキサイド・プロピレンオキサイド（ブロックま
たはランダム）付加物、脂肪酸エチレンオキサイド・プ
ロピレンオキサイド付加物、油脂エチレンオキサイド付
加物、油脂エチレンオキサイド・プロピレンオキサイド
付加物、ロジン酸エチレンオキサイド付加物、ロジン酸
エチレンオキサイド・プロピレンオキサイド付加物等の
非イオン界面活性剤；アミンオキサイド、アルキルベタ
イン等の両性界面活性剤が挙げられる。この場合、アル
カリリパーゼと界面活性剤との重量配合が1/500〜1/3の
範囲で特に優れた脱墨効果を発揮する。Specifically, anionic surfactants such as higher fatty acid salt, alkylbenzene sulfonate, α-olefin sulfonate, higher alcohol sulfate ester salt, dialkyl sulfosuccinate; higher alcohol ethylene oxide adduct, alkylphenol ethylene oxide addition Stuff,
Fatty acid ethylene oxide adduct, fatty acid amide, fatty acid amide ethylene oxide adduct, higher alcohol ethylene oxide / propylene oxide (block or random) adduct, fatty acid ethylene oxide / propylene oxide adduct, oil / fat ethylene oxide adduct, oil / fat ethylene oxide / Nonionic surfactants such as propylene oxide adducts, rosin acid ethylene oxide adducts, rosin acid ethylene oxide / propylene oxide adducts; amphoteric surfactants such as amine oxides and alkyl betaines. In this case, a particularly excellent deinking effect is exhibited when the weight ratio of alkaline lipase and surfactant is in the range of 1/500 to 1/3.
脱墨処理に際しては、水酸化ナトリウムやケイ酸ナト
リウム、塩化ナトリウム、硫酸ナトリウム、炭酸ナトリ
ウム、炭酸カルシウム、塩化カルシウム、トリポリリン
酸ナトリウム、トリメタリン酸ナトリウム、ヘキサメタ
リン酸ナトリウム、ピロリン酸ナトリウム、エチレンジ
アミン四酢酸ナトリウム、ニトリロ三酢酸ナトリウム、
ジエチレントリアミン五酢酸ナトリウム、カルボキシメ
チルセルロース、グルコン酸ナトリウム、リンゴ酸ナト
リウム等のアルカリ剤やビルダー、過酸化水素等の漂白
剤を併用することにより、より一層優れた脱墨効果を得
ることができる。In the deinking treatment, sodium hydroxide or sodium silicate, sodium chloride, sodium sulfate, sodium carbonate, calcium carbonate, calcium chloride, sodium tripolyphosphate, sodium trimetaphosphate, sodium hexametaphosphate, sodium pyrophosphate, sodium ethylenediaminetetraacetate, Sodium nitrilotriacetate,
By using an alkali agent such as sodium diethylenetriaminepentaacetate, carboxymethylcellulose, sodium gluconate, sodium malate, etc., or a bleaching agent such as hydrogen peroxide, a more excellent deinking effect can be obtained.
本発明によるアルカリリパーゼの用法としては、上記
の脱墨薬品を加えるか、または脱墨薬品と一諸にアルカ
リリパーゼを添加して30〜50℃で１〜12時間放置する。
漂白剤として過酸化水素を使用する場合、過酸化水素濃
度が充分低い状態（例えば、0.8％以下）においてアル
カリリパーゼを添加することが望ましい。高濃度の過酸
化水素により、アルカリリパーゼが失活する恐れがある
からである。As the usage of the alkaline lipase according to the present invention, the above-mentioned deinking chemicals are added, or alkaline lipase is added together with the deinking chemicals and left at 30 to 50 ° C. for 1 to 12 hours.
When hydrogen peroxide is used as a bleaching agent, it is desirable to add alkaline lipase in a state where the hydrogen peroxide concentration is sufficiently low (for example, 0.8% or less). This is because a high concentration of hydrogen peroxide may deactivate alkaline lipase.
アルカリリパーゼを添加した後、効果を発揮するため
の接触時間は少なくとも１時間とすることが望ましく、
また12時間以上としても脱墨効果の向上はそれ程期待で
きない。アルカリリパーゼは、離解工程、熟成タワー工
程または脱墨処理工程の１つとして独立して用いても良
い。After adding the alkaline lipase, the contact time for exerting the effect is preferably at least 1 hour,
Moreover, even if it is 12 hours or more, the improvement of the deinking effect cannot be expected so much. Alkaline lipase may be used independently as one of the disaggregation step, aging tower step or deinking step.
発明の効果 本発明の脱墨剤によれば、脱墨処理のpH領域であるpH
8.0〜12.0に至適pHを有するアルカリリパーゼを用いる
ことにより、従来脱インキが難しいとされたオフセット
印刷古紙に由来する剥離しにくいインキ、特にインキビ
ヒクル中に存在する乾性油等の油脂を加水分解すること
ができ、パルプ繊維からのインキ脱離を促進し、フロー
テーションや水洗方式で効果的にインキを除去すること
ができることから、高白色度で、かつ残インキ量も少な
い高品質のパルプを再生することができる。Effects of the Invention According to the deinking agent of the present invention, the pH which is the pH range of the deinking treatment is
By using an alkaline lipase with an optimum pH of 8.0 to 12.0, it is possible to hydrolyze the difficult-to-separate ink that originates from offset printing waste paper, which was previously difficult to deink, especially the oils and fats such as drying oil present in the ink vehicle. It is possible to promote the desorption of ink from pulp fibers and to effectively remove the ink by flotation or washing with water, so that a high-quality pulp with high whiteness and a small amount of residual ink can be obtained. Can be played.
本発明の脱墨剤は印刷古紙の種類や印刷方法にもよら
ず適用することができ、例えば、新聞、雑誌、書籍、ち
らしなどの印刷物、あるいは凸版印刷、オフセット印
刷、グラビア印刷などの印刷方法による印刷物などに適
用することができる。The deinking agent of the present invention can be applied regardless of the type and printing method of waste printing paper, for example, printed matter such as newspapers, magazines, books, leaflets, or printing methods such as letterpress printing, offset printing, gravure printing. It can be applied to printed matter and the like.
また、従来の脱墨処理の如く、50℃以上の高温を必要
とせず、比較的低温（40℃以下）にて脱墨効果を発揮す
る事が可能である。従って、高温時に溶解するピッチ等
による、抄紙時の紙切れの防止をも可能にするものであ
る。Further, unlike the conventional deinking treatment, it is possible to exert the deinking effect at a relatively low temperature (40 ° C or lower) without requiring a high temperature of 50 ° C or higher. Therefore, it is possible to prevent paper breakage at the time of papermaking due to the pitch and the like which melt at high temperature.
実施例１〜10、比較例１〜10 原料として新聞古紙（オフセット／凸版＝8/2）90％
とチラシ10％を細断し、パルプ離解機（JIS P−8209）
に入れ、古紙の重量に対して粒状水酸化ナトリウム1.5
％、40％３号ケイ酸ナトリウム1.5％、第１表に記載し
たアルカリリパーゼ（ノボ社製リパーゼSP356）含有脱
墨剤0.3％を加え、原料濃度が５％となるように温水を
加えて45℃で20分間解離処理を行った。45℃、４時間放
置後、過酸化水素0.6％（有効成分）、40％３号ケイ酸
ナトリウム2.0％を添加し、50℃、１時間漂白処理を行
った。得られたパルプスラリーは、パルプ濃度が1.0％
になるよう水で希釈し、界面活性剤として脂肪酸を使用
したもののみ（実施例１、比較例１）古紙の重量に対し
て塩化カルシウムを0.7％添加して、試験用フローテー
ター（極東振興（株）製）を用いて10分間25℃にてフロ
ーテーション処理を行った。Examples 1 to 10 and Comparative Examples 1 to 10 Newspaper waste paper (offset / letter plate = 8/2) 90% as a raw material
And 10% shredded leaflets, pulp disintegrator (JIS P-8209)
1.5 g of granular sodium hydroxide to the weight of waste paper
%, 40% No. 3 sodium silicate 1.5%, 0.3% of deinking agent containing alkaline lipase (Novase Lipase SP356) listed in Table 1, and warm water was added to make the raw material concentration 5%. Dissociation treatment was performed at 20 ° C. for 20 minutes. After standing at 45 ° C for 4 hours, hydrogen peroxide 0.6% (active ingredient) and 40% sodium silicate No. 3 2.0% were added, and bleaching treatment was performed at 50 ° C for 1 hour. The pulp slurry obtained has a pulp concentration of 1.0%.
Only the one diluted with water so that the fatty acid was used as a surfactant (Example 1, Comparative Example 1), 0.7% of calcium chloride was added to the weight of the waste paper, and the test floatator (Far East promotion ( The product was subjected to flotation treatment for 10 minutes at 25 ° C.
得られたパルプ液を標準シートマシーン（JIS P−820
9）にかけて再生紙を坪量100g/m2で調製し、再生紙の白
色度をJIS P−8123の方法に基づいて、ハンター白度で
測定した。また、画像処理装置を用いてこの再生紙の残
インキの個数と大きさを求め、その数値から残インキ面
積率を算出し、フローテーション後の残インキ残存度合
を測定した。その結果を後記第１表に示す。The obtained pulp liquid was used as a standard sheet machine (JIS P-820
Recycled paper was prepared with a basis weight of 100 g / m 2 through 9), and the whiteness of the recycled paper was measured by Hunter whiteness based on the method of JIS P-8123. Further, the number and size of the residual ink on the recycled paper were obtained using an image processing device, the residual ink area ratio was calculated from the numerical values, and the residual ink residual degree after flotation was measured. The results are shown in Table 1 below.
比較例１〜10は、実施例１〜10において、アルカリリ
パーゼを添加する事なしに、同様の操作を行った結果で
ある。Comparative Examples 1 to 10 are results obtained by performing the same operation as in Examples 1 to 10 without adding alkaline lipase.
実施例11〜18 原料として新聞古紙（オフセット／凸版＝7/3）80％
とチラシ20％を細断し、パルプ離解記（JIS P−8209）
に入れ、古紙の重量に対して粒状水酸化ナトリウム1.5
％、40％３号ケイ酸ナトリウム3.5％、過酸化水素0.5％
（有効成分）および後記第２表に記載した脱墨剤のうち
界面活性剤のみ所定量（界面活性剤とリパーゼ合計で0.
3％）を加え、原料濃度が５％となるよう温水を加えて5
5℃で20分間離解処理を行った。さらに20分放置した
後、第２表に記載したアルカリリパーゼ（ノボ社製リパ
ーゼSP−356）を所定量添加し、40℃、３時間放置し
た。得られたパルプスラリーは、パルプ濃度が1.0％に
なるよう水で希釈し、界面活性剤として脂肪酸を使用し
たもののみ（実施例13）古紙の重量に対して塩化カルシ
ウムを0.7％添加して、試験用フローテーター（極東振
興（株）製）を用いて10分間25℃にてフローテーション
処理を行った。Examples 11 to 18 Waste newspaper (offset / letter plate = 7/3) 80% as raw material
And shred 20% of leaflets, and disaggregate pulp (JIS P-8209)
1.5 g of granular sodium hydroxide to the weight of waste paper
%, 40% No. 3 sodium silicate 3.5%, hydrogen peroxide 0.5%
Of the deinking agents listed in (Active ingredient) and Table 2 below, only the surfactant is in a predetermined amount (total of the surfactant and lipase is 0.
3%) and add warm water to make the raw material concentration 5%.
Disaggregation was performed at 5 ° C for 20 minutes. After further standing for 20 minutes, a predetermined amount of alkaline lipase (Lipase SP-356 manufactured by Novo Co.) shown in Table 2 was added, and the mixture was left at 40 ° C. for 3 hours. The obtained pulp slurry was diluted with water so that the pulp concentration was 1.0%, and only the one using a fatty acid as a surfactant (Example 13) was added 0.7% of calcium chloride based on the weight of waste paper, Flotation treatment was performed at 25 ° C for 10 minutes using a test floatator (manufactured by Kyokuto Shinko Co., Ltd.).
得られたパルプ液を標準シートマシーン（JIS P−820
9）にかけて再生紙を坪量100g/m2で調製し、実施例１〜
10と同様にして再生紙の白色度および残インキ面積率を
測定した。その結果を第２表に示す。The obtained pulp liquid was used as a standard sheet machine (JIS P-820
9) to prepare recycled paper with a basis weight of 100 g / m 2 , and
In the same manner as in 10, the whiteness of the recycled paper and the residual ink area ratio were measured. Table 2 shows the results.
実施例19〜26 原料として新聞古紙（オフセット／凸版＝9/1）70％
とチラシ30％を細断し、パルプ離解記（JIS P−8209）
に入れ、古紙の重量に対して粒状水酸化ナトリウム1.5
％、40％３号ケイ酸ナトリウム3.5％、過酸化水素0.55
％（有効成分）および第３表に記載した脱墨剤のうち界
面活性剤のみ所定量（界面活性剤とリパーゼ合計で0.3
％）を加え、原料濃度が５％となるよう温水を加えて55
℃で20分間離解処理を行った。さらに30分放置した後、
第３表に記載したアルカリリパーゼ（生化学工業社製ア
ルカリ性リパーゼ）を所定量添加し、40℃で６時間放置
した。得られたパルプスラリーは、パルプ濃度が1.0％
になるよう水で希釈し、試験用フローテーター（極東振
興（株）製）を用いて10分間25℃にてフローテーション
処理を行った。Examples 19-26 70% waste newspaper (offset / letter plate = 9/1) as raw material
And shred 30% of leaflets and disaggregate pulp (JIS P-8209)
1.5 g of granular sodium hydroxide to the weight of waste paper
%, 40% No. 3 sodium silicate 3.5%, hydrogen peroxide 0.55
% (Active ingredient) and of the deinking agents listed in Table 3, only the surfactant is in a predetermined amount (0.3% in total of the surfactant and lipase).
%), And add warm water to make the raw material concentration 5%.
Disaggregation was performed at 20 ° C for 20 minutes. After leaving it for another 30 minutes,
A predetermined amount of alkaline lipase shown in Table 3 (alkaline lipase manufactured by Seikagaku Corporation) was added, and the mixture was allowed to stand at 40 ° C for 6 hours. The pulp slurry obtained has a pulp concentration of 1.0%.
It was diluted with water so that it became, and a flotation treatment was performed at 25 ° C. for 10 minutes using a test floatator (manufactured by Kyokuto Shinko Co., Ltd.).
得られたパルプ液を標準シートマシーン（JIS P−820
9）にかけて再生紙を坪量100g/m2調製し、実施例１〜10
と同様にして再生紙の白色度および残インキ面積率を算
出し、その結果を第３表に示した。The obtained pulp liquid was used as a standard sheet machine (JIS P-820
9) Recycled paper was prepared by applying 100 g / m 2 basis weight to Examples 1-10.
The whiteness and the residual ink area ratio of recycled paper were calculated in the same manner as in, and the results are shown in Table 3.
Claims (1)
する脱墨剤。1. A deinking agent containing an alkaline lipase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22721688A JPH0814078B2 (en) | 1988-09-09 | 1988-09-09 | Deinking agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22721688A JPH0814078B2 (en) | 1988-09-09 | 1988-09-09 | Deinking agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0280684A JPH0280684A (en) | 1990-03-20 |
| JPH0814078B2 true JPH0814078B2 (en) | 1996-02-14 |
Family
ID=16857315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22721688A Expired - Lifetime JPH0814078B2 (en) | 1988-09-09 | 1988-09-09 | Deinking agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0814078B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002095127A3 (en) * | 2001-05-21 | 2003-05-01 | Novozymes As | Use of lipolytic enzymes for stickies control |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370770A (en) * | 1992-11-09 | 1994-12-06 | The Mead Corporation | Method for deinking printed waste paper using soybean peroxidase |
| US6426200B1 (en) | 1994-09-15 | 2002-07-30 | University Of Georgia Research Foundation, Inc. | Methods for enzymatic deinking of waste paper |
| US5837097A (en) * | 1995-12-20 | 1998-11-17 | Lion Corporation | Deinking agent for regenerating waste paper and method for deinking waste paper |
| US6471826B2 (en) * | 2000-06-16 | 2002-10-29 | Buckman Laboratories International, Inc. | Methods to control organic contaminants in fibers |
| WO2002057538A2 (en) * | 2001-01-16 | 2002-07-25 | Novozymes North America, Inc. | Neutral deinking with a deinking composition comprising a lipase and a fatty acid ester |
| US7156514B2 (en) * | 2004-04-30 | 2007-01-02 | Lexmark International, Inc. | Inks and printheads with internal clog prevention |
| CN110396325A (en) * | 2019-07-09 | 2019-11-01 | 江西瑞思博新材料有限公司 | A kind of screen printing ink cleaning agent and preparation method thereof |
-
1988
- 1988-09-09 JP JP22721688A patent/JPH0814078B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002095127A3 (en) * | 2001-05-21 | 2003-05-01 | Novozymes As | Use of lipolytic enzymes for stickies control |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0280684A (en) | 1990-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6241849B1 (en) | Methods for deinking and decolorizing printed paper | |
| JP2005506472A (en) | Oxidase in the manufacture of paper materials | |
| US5370770A (en) | Method for deinking printed waste paper using soybean peroxidase | |
| JPH06508663A (en) | Method for delignification, bleaching and white water treatment of lignocellulose-containing materials using laccases with increased efficiency | |
| CA2637691A1 (en) | Chemical pulp treatment compositions and methods | |
| KR20000003300A (en) | Corrugated cardboard regenerating method using floating and enzyme processing | |
| CN1312353C (en) | New process for lipase waste paper deinking | |
| JP2016538433A (en) | Enzymatic treatment to reduce residual mineral oil concentration in papermaking virgin fiber and recycled paper | |
| Wang et al. | Studies on the environmentally friendly deinking process employing biological enzymes and composite surfactant | |
| JPH0814078B2 (en) | Deinking agent | |
| CA2440216A1 (en) | Deinking of waste paper | |
| JPH02160984A (en) | Deinking method of waste paper | |
| US20040099385A1 (en) | Neutral deinking with a deinking composition comprising a lipase and a fatty acid ester | |
| EP0553196A1 (en) | HYDROLYSIS OF RESIN IN PASTE. | |
| JPH09241985A (en) | Used paper recycling method | |
| Pathak et al. | Fungal enzymes application for recycling of waste papers | |
| WO2000053843A1 (en) | A process and an enzyme preparation with steryl esterase activity for controlling pitch during paper manufacture | |
| JPH08120580A (en) | Deinking of printed waste paper | |
| KR100273932B1 (en) | Recycling method of waste paper to use specitic enzyme in floation-deinking system | |
| JPH0357235B2 (en) | ||
| JPH07145584A (en) | Deinking agent and method of deinking used paper | |
| Magnin et al. | Potential of enzymatic deinking | |
| JPH08199489A (en) | Deinking of printed old paper | |
| JPH08127989A (en) | Method for deinking old printed paper | |
| Bajpai | Biodeinking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080214 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090214 Year of fee payment: 13 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090214 Year of fee payment: 13 |