JPS6284101A - Refining of pulp - Google Patents
Refining of pulpInfo
- Publication number
- JPS6284101A JPS6284101A JP22268785A JP22268785A JPS6284101A JP S6284101 A JPS6284101 A JP S6284101A JP 22268785 A JP22268785 A JP 22268785A JP 22268785 A JP22268785 A JP 22268785A JP S6284101 A JPS6284101 A JP S6284101A
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- cellulose
- blasting
- pressure
- hemicellulose
- 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
- 238000007670 refining Methods 0.000 title description 2
- 229920002678 cellulose Polymers 0.000 claims abstract description 24
- 239000001913 cellulose Substances 0.000 claims abstract description 24
- 238000005422 blasting Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 10
- 229920002488 Hemicellulose Polymers 0.000 abstract description 12
- 239000012535 impurity Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010025 steaming Methods 0.000 abstract description 3
- 239000003960 organic solvent Substances 0.000 abstract description 2
- 239000012978 lignocellulosic material Substances 0.000 abstract 2
- 239000002994 raw material Substances 0.000 abstract 1
- 229920001747 Cellulose diacetate Polymers 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 9
- 238000011282 treatment Methods 0.000 description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Substances CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 229920002301 cellulose acetate Polymers 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 230000021736 acetylation Effects 0.000 description 4
- 238000006640 acetylation reaction Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 235000000346 sugar Nutrition 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000004061 bleaching Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 150000008163 sugars Chemical class 0.000 description 3
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 229920000875 Dissolving pulp Polymers 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- LUEWUZLMQUOBSB-FSKGGBMCSA-N (2s,3s,4s,5s,6r)-2-[(2r,3s,4r,5r,6s)-6-[(2r,3s,4r,5s,6s)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2r,4r,5s,6r)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol Chemical compound O[C@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@@H](O[C@@H]2[C@H](O[C@@H](OC3[C@H](O[C@@H](O)[C@@H](O)[C@H]3O)CO)[C@@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O LUEWUZLMQUOBSB-FSKGGBMCSA-N 0.000 description 1
- 229920002581 Glucomannan Polymers 0.000 description 1
- 235000010582 Pisum sativum Nutrition 0.000 description 1
- 240000004713 Pisum sativum Species 0.000 description 1
- 235000002492 Rungia klossii Nutrition 0.000 description 1
- 244000117054 Rungia klossii Species 0.000 description 1
- WDJHALXBUFZDSR-UHFFFAOYSA-N acetoacetic acid Chemical compound CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- -1 alditol acetate Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229940046240 glucomannan Drugs 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001374 small-angle light scattering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、リグノセルロース材料より得たパルプより不
純物である残留へミセルクースなどを爆砕処理により効
果的に除去し純度の高いセルロース繊維を得るパルプの
精製法に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for producing pulp obtained from lignocellulose material by effectively removing impurities such as residual hemicellulose by blasting to obtain highly pure cellulose fibers. This relates to a method for purifying.
（従来の技術及び問題点）
セルロース含量として木材バルプパやリン・ターといっ
たリグノセルロースが用いられる。(Prior Art and Problems) Lignocellulose such as wood barpupa and lin tar is used as the cellulose content.
木材パルプは、ｙンターバルプに比し−１一般に残留ヘ
ミセルロースが多いためセルロース純度が低く、セルロ
ース含量として利用する場合には、問題が多い。Wood pulp generally has -1 more residual hemicellulose than interbulp, and therefore has a low cellulose purity, which poses many problems when used as a cellulose content.
我々は、最近の研究で二酢酸セルローヌの１アセトン溶
液をガラスピーズ製ＧＰＣカヲムを用いて分析をおこな
い、図−１に示すような４つのピークが現われることを
確認した。In recent research, we analyzed a 1-acetone solution of Cellulone diacetate using a Glass Peas GPC column and confirmed that four peaks as shown in Figure 1 appeared.
便宜上これらのピークを、溶出時間の短いものから順に
、プレハンプ！、プレハンプ■、メインハンプ、ポスト
ハンプと名づけると、メインハングはアセトン可溶の二
酢酸セルロースであり、プレハンプＩは、超遠心分離機
を用いた詳細な実験によりゲルで構成されているという
ことが判明した。For convenience, pre-hump these peaks in order of elution time starting from the shortest! , pre-hump ■, main hump, and post-hump.The main hang is acetone-soluble cellulose diacetate, and pre-hump I was found to be composed of gel through detailed experiments using an ultracentrifuge. found.
またパルプ中に存在するヘミセルロースの大部分がこの
ゲル中に集中していることもわかった。プレひンプ■に
関しては、ガラヌ系及びビニール系充填剤を用いたカラ
ムでのプレハンプ■の出現状況から、アニオン性の分重
合物と考えられている。ここで、二酢酸セルロースとは
平均酢化度が５３〜５７％の酢酸セルロースを意味する
。It was also found that most of the hemicellulose present in the pulp was concentrated in this gel. Regarding pre-hump (■), it is thought to be an anionic fractional polymer based on the appearance of pre-hump (2) in columns using galanic and vinyl-based packing materials. Here, cellulose diacetate means cellulose acetate having an average degree of acetylation of 53 to 57%.
これまで、酢酸セルロース製造用に用いてきたセルロー
ス含量は、α−セルロース含量が９５％以上と高く比較
的低α−セルロース含量の含量を使いこなすことは困難
であった。Up to now, the cellulose content used for cellulose acetate production has a high α-cellulose content of 95% or more, making it difficult to fully utilize a relatively low α-cellulose content.
これはα−セルロース含量が低くなるほど、二酢酸セル
ロースのアセトン溶液中にできるゲル量、すなわちプレ
ハンプＩが増加するためでゲルによるフィルターやノヅ
ルの目づまり、紡糸の際の糸切れを引きおこすと考えら
れてきた。また色相に関しても酢化触媒として用いられ
る硫酸がエステルとして存在するため色相に悪影響を及
ぼし、ＧＰＣ曲線上では、プレハンプ■に溶出すると推
定されている。This is thought to be because the lower the α-cellulose content, the more the amount of gel formed in the acetone solution of cellulose diacetate, that is, the pre-hump I, which causes the gel to clog filters and nozzles and cause thread breakage during spinning. It's here. Regarding the hue, since sulfuric acid used as an acetylation catalyst exists as an ester, it has an adverse effect on the hue, and is estimated to elute at the pre-hump ■ on the GPC curve.
図−１−こ示されるような４つのピークのうちプレハン
プエと■は木材パルプのようにα−セルロース含量の低
いものに、顕著に現われる一方、綿などを含量とした酢
酸セルロースにおいては、非常に少ないことも知られて
いる。従って実用上、さまざまな問題をおこ１しうる異
種成分（プレハンプ！及びｎ）の少ない酢酸セルロース
を木材パルプのような低α−セルロース含量の材料より
つくり得るならば酢酸セルロース製造上大きなメリット
となる。さらにこれらの実用物性上の諸問題解決は、酢
酸セルロースのみならず他のセルローヌ誘導体の製造に
おいても大きなメリットとなる。Of the four peaks shown in Figure 1, pre-hampere and ■ appear prominently in materials with low α-cellulose content, such as wood pulp, while they are extremely pronounced in cellulose acetate with a content such as cotton. It is also known that there are few Therefore, if cellulose acetate with less foreign components (pre-hump! and n), which can cause various practical problems, can be made from a material with a low α-cellulose content such as wood pulp, it would be a great advantage in the production of cellulose acetate. . Furthermore, solving these practical physical property problems will be of great benefit not only in the production of cellulose acetate but also in the production of other cellulone derivatives.
従ってセルロース含量よりヘミセルロース等の一不純物
を除去できればセルロース誘導体の実用物性に関する諸
問題の解決につながる。Therefore, if one impurity such as hemicellulose can be removed from the cellulose content, it will lead to solving various problems regarding the practical physical properties of cellulose derivatives.
ところが、これまで、セルロース純度を上げる精製法と
しては漂白精製が採用されているが、セルロースの解重
合や変質があり、高度に漂白しても木材パルプを用いた
場合は３％程度のヘミセルロースが残存する。However, although bleach purification has been adopted as a purification method to increase cellulose purity, it causes depolymerization and alteration of cellulose, and even with a high degree of bleaching, when wood pulp is used, about 3% hemicellulose remains. remain.
一方、爆砕処理法は、木材の酵素糖化に対する前処理法
として、開発されたが木材にこの処理を適用したのでは
、リグニンやヘミセルロース等の不純物を取りのぞける
ものの、セルロース誘導体製造用などの高純度セルロー
スパルプは得られずこれまでセルロース含量の精製法と
しては用いられていなかった。On the other hand, the blasting treatment method was developed as a pretreatment method for enzymatic saccharification of wood, but when applied to wood, impurities such as lignin and hemicellulose can be removed, but it is not suitable for high-purity products such as those used in the production of cellulose derivatives. Since cellulose pulp cannot be obtained, this method has not been used as a method for purifying cellulose content.
（問題点を解決するための手段）
本発明者らはリグノセルロース材料より得たパルプ（セ
ルロース含量８０％以上）を爆砕処理することにより、
これまでの蒸解及び漂白過程で取りのぞきえなかった残
留ヘミセルロースなどの不純物を効果的に除去しセルロ
ース純度の高いセルロース繊維が得られることを見い出
し、本発明を完成した。(Means for Solving the Problems) The present inventors achieved the following by blasting pulp obtained from lignocellulose material (cellulose content: 80% or more).
The present invention was completed based on the discovery that cellulose fibers with high cellulose purity can be obtained by effectively removing impurities such as residual hemicellulose that could not be removed in the conventional cooking and bleaching processes.
即ち本発明は、リグノセルロース材料より得たセルロー
ス含量８０％以上のパルプを爆砕処理することを特徴と
するパルプの精製法である。That is, the present invention is a method for refining pulp, which is characterized by subjecting pulp obtained from lignocellulose material and having a cellulose content of 80% or more to a crushing treatment.
（出発物） 本発明に使用するパルプとしては°晒パルプ。(Starting material) The pulp used in the present invention is bleached pulp.
未晒パルプともに使用可能であるが、晒バルブでセルロ
ース含量８０％以上が好ましい。Although both unbleached pulp can be used, a bleached pulp with a cellulose content of 80% or more is preferred.
パルプ種は、木材、綿を含むすべてのリグノ。Pulp species include all lignos including wood and cotton.
セルロース材料に適用しうる。Applicable to cellulose materials.
；精製法）
本発明の爆砕処理としては含量パルプを耐圧容器中で高
温（１００〜３００℃）、高圧（５〜２００％ｌ）の水
蒸気で短時間（１０秒〜１時間）、好ましくは２２０℃
前後、３０１程度で数分間蒸煮しその後急速に減圧大気
圧下に放出することにより精製を行うが急速に減圧大気
圧下に放出せずに徐々に水蒸気を除き常圧にもどすか、
蒸煮後、密閉して放冷によって徐々に冷却し、反応槽内
の水蒸気の凝縮によって大気圧にもどしてもよい。; Purification method) The blasting treatment of the present invention involves blasting the high content pulp in a pressure vessel with steam at high temperature (100 to 300°C) and high pressure (5 to 200% l) for a short period of time (10 seconds to 1 hour), preferably at 220°C. ℃
Purification is carried out by steaming at around 301°C for a few minutes and then rapidly releasing it under reduced pressure and atmospheric pressure, but instead of releasing it rapidly into reduced pressure and atmospheric pressure, gradually remove the water vapor and return it to normal pressure.
After steaming, the reaction vessel may be closed and gradually cooled by air cooling, and the pressure may be returned to atmospheric pressure by condensation of water vapor in the reaction vessel.
処理試料は引き続き水抽出及びメタノール又はジオキサ
ンなどの有機溶媒で抽出処理することが好ましい。Preferably, the treated sample is subsequently extracted with water and an organic solvent such as methanol or dioxane.
この抽出処理条件としては公知の処理条件を適用すれば
良い。Known processing conditions may be applied as the extraction processing conditions.
（発明の効果）
本発明はリグノセルロース材料より得たパルプを爆砕処
理することによりセルロース純。(Effects of the Invention) The present invention produces pure cellulose by blasting pulp obtained from lignocellulose material.
度の高いパルプを得ることができる。A high-quality pulp can be obtained.
（！！施例）
以下の実施例によって本発明を説明するが、これらによ
って本発明を限定するものではない。(!!Example) The present invention will be explained by the following examples, but the present invention is not limited by these.
実施例及び比較例
木材パルプ（αセルロー７．９４５％）１００９（絶乾
量）を２ｅの耐圧容器に入れ２２０℃、２８’％ｌＩの
水蒸気で、４分及び８分蒸煮したのち、急速に大気圧に
減圧した。この爆砕処理で得られた爆砕パルプを水抽出
、ジオキサン抽出したのち、アルジトールアセテート法
を用いて残留へミセルス
ローへ量を測定した。厳密には、構成糖°からセルロー
ス及びキンニ、グルコマン
ナンといったヘミセルロース量を算出シエないが、ここ
では構成糖比なもって、それらの化学成分比と考えるこ
とにする。Examples and Comparative Examples Wood pulp (α cellulose 7.945%) 1009 (absolute dry weight) was placed in a 2e pressure vessel and steamed for 4 and 8 minutes at 220°C and 28'% lI steam, and then rapidly boiled. The pressure was reduced to atmospheric pressure. The blasted pulp obtained by this blasting treatment was extracted with water and dioxane, and then the amount of residual hemicellulose was measured using the alditol acetate method. Strictly speaking, it is not possible to calculate the amount of cellulose and hemicellulose such as glucomannan from the constituent sugars, but here we will consider the constituent sugar ratio to be the ratio of their chemical components.
図−２には、爆砕処理前と処理後試料の構成糖の分析結
果が示しである。爆砕処理前のパルプは、現在セルロー
ス含量パルプとして市場に出まわっているセルロース誘
導体用溶解パルプである。しかしながら、前述の通り２
．３％程度のヘミセルロースが存在する。ところが４分
及び８分処理をほどこすと効果的に残存ヘミセルロース
が除去される。その結果セルロース純度が処理前の９７
．７％から９９．２％に上った。Figure 2 shows the analysis results of the constituent sugars of the sample before and after the blasting treatment. The pulp before blasting is a dissolving pulp for cellulose derivatives that is currently on the market as a cellulose-containing pulp. However, as mentioned above, 2
．． Approximately 3% hemicellulose is present. However, the residual hemicellulose is effectively removed by the 4 and 8 minute treatments. As a result, the cellulose purity was 97
．． The percentage rose from 7% to 99.2%.
砕処理４分、８分でそれぞれ抽出されている。このこと
は、これまで蒸解、漂白により得られる木材精製溶解パ
ルプの純度を飛躍的に上昇させえたことを意味する。It was extracted after 4 minutes and 8 minutes of crushing, respectively. This means that it has been possible to dramatically increase the purity of wood refined dissolving pulp obtained by cooking and bleaching.
参考例
未処理パルプと爆砕パルプ４分、及び８分処理品を常法
に従い酢化処理し、二酢酸セルロースを調製した。得ら
れた二酢酸セルロースの酢化度は中和滴定法による＼結
合酢酸量の定量により求めた。これより！・換度（ＤＳ
）を算出した。Reference Example Untreated pulp and blasted pulp treated for 4 minutes and 8 minutes were acetylated according to a conventional method to prepare cellulose diacetate. The degree of acetylation of the obtained cellulose diacetate was determined by quantifying the amount of bound acetic acid using a neutralization titration method. Than this!・Conversion degree (DS
) was calculated.
二酢酸セルロースの性状を知るためＨａｇｅと硫酸透過
率を測定した。ヘイズは、９５％アセトン溶液をハンタ
ーモデルＤ２５で測定硫酸透過率は６６％濃硫酸中で３
時間溶解（２０℃）後分光光度計スペクトロフォトメー
ター日立１２４を用い４４０ｎｍで透過率を測定した。In order to understand the properties of cellulose diacetate, Hage and sulfuric acid permeability were measured. Haze was measured using a Hunter model D25 using a 95% acetone solution. Sulfuric acid permeability was 3% in 66% concentrated sulfuric acid.
After time dissolution (20° C.), transmittance was measured at 440 nm using a spectrophotometer Hitachi 124.
また、得られた二酢酸セルロースのＧＰＣパターンを求
めるため以下の測定条件に従って測定をおこなった。Further, in order to determine the GPC pattern of the obtained cellulose diacetate, measurements were performed according to the following measurement conditions.
装 置： ＧＰＣ−ＬＡＬＬＳ （ウォター社 １５
０ Ｃ型 ）
カフム：ＧＭＰＷ（東洋ソーダ）
インジェクＶＢ ：／ ”、α２％（ｗｔ／ｖｄ）ｏｐ
ｅ
溶 媒ニア七トン
流 量 ： Ｉ Ｍｔ／ ｍｉｎ
チャートスピード： ２ ｅｒａ ／ ｍｉｎ表−１に
は得られた二酢酸セルロースの性状を示めし’ｊｌ’ｌ
’Ｐ Ｃ／（タニ・（図−１）゛での全流出量に対する
プレハンプＩ及び■での流出量の割合を示した。得られ
た酢化度（又はＤＳ値）はほぼ等しいにもかかわらず爆
砕処理した試料を用いることにより明らかにプレハンプ
Ｉ及び■の量が低減し、それに伴って硫酸透過率も上昇
した。Equipment: GPC-LALLS (Water Co., Ltd. 15
0 C type) Kahum: GMPW (Toyo Soda) Inject VB:/”, α2% (wt/vd) op
e Solvent 7 ton flow rate: I Mt/min Chart speed: 2 era/min Table 1 shows the properties of the obtained cellulose diacetate.
'PC/(Tani・(Figure 1)) The ratio of the outflow amount at Pre-Hump I and ■ to the total outflow amount at '' is shown. Although the obtained acetylation degree (or DS value) is almost the same, By using the sample subjected to the blasting treatment, the amounts of pre-humps I and II were clearly reduced, and the sulfuric acid permeability increased accordingly.
表−１爆砕処理（４分、８分）及び未 処理バルブを用いて得た二酢酸 セルロースの性状Table-1 Explosive treatment (4 minutes, 8 minutes) and unprocessed Diacetic acid obtained using processing valve Properties of cellulose
図−１は二酢酸セルロース／アセトン溶液のＧＰＣ曲線
のパターンを示す。
図−２は実施例比較例におけるパルプの爆砕処理時間と
構成糖の相関を図示したものである。
イで埋入 冷■ｔ−ｈ 、ｉ自１１ 隆１ｉ１−３
３８＾ｔｈ’１（ａｒｔｓ）
≧４４→ ５Figure 1 shows the GPC curve pattern of cellulose diacetate/acetone solution. FIG. 2 illustrates the correlation between pulp blasting treatment time and constituent sugars in Examples and Comparative Examples. Fill in with i cold ■ t-h, i self 11 Takashi 1i1-3 38^th'1 (arts) ≧44→ 5
Claims (1)
、８０％以上）を爆砕処理することを特徴とするパルプ
の精製法。A method for purifying pulp, which comprises blasting pulp obtained from lignocellulose material (cellulose content: 80% or more).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60222687A JPH0653761B2 (en) | 1985-10-08 | 1985-10-08 | Pulp refining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60222687A JPH0653761B2 (en) | 1985-10-08 | 1985-10-08 | Pulp refining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6284101A true JPS6284101A (en) | 1987-04-17 |
| JPH0653761B2 JPH0653761B2 (en) | 1994-07-20 |
Family
ID=16786337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60222687A Expired - Lifetime JPH0653761B2 (en) | 1985-10-08 | 1985-10-08 | Pulp refining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653761B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152889A (en) * | 1979-05-16 | 1980-11-28 | Kikkoman Shoyu Co Ltd | Pulp producing method |
| JPS60173001A (en) * | 1984-02-20 | 1985-09-06 | Jujo Pulp Kk | Production of fine cellulose particle |
-
1985
- 1985-10-08 JP JP60222687A patent/JPH0653761B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55152889A (en) * | 1979-05-16 | 1980-11-28 | Kikkoman Shoyu Co Ltd | Pulp producing method |
| JPS60173001A (en) * | 1984-02-20 | 1985-09-06 | Jujo Pulp Kk | Production of fine cellulose particle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0653761B2 (en) | 1994-07-20 |
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