JPS62223385A - Production of pulp - Google Patents
Production of pulpInfo
- Publication number
- JPS62223385A JPS62223385A JP5985286A JP5985286A JPS62223385A JP S62223385 A JPS62223385 A JP S62223385A JP 5985286 A JP5985286 A JP 5985286A JP 5985286 A JP5985286 A JP 5985286A JP S62223385 A JPS62223385 A JP S62223385A
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- cooking
- volume
- parts
- chips
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000010411 cooking Methods 0.000 claims description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 25
- 239000003960 organic solvent Substances 0.000 claims description 25
- 229920005610 lignin Polymers 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- 150000002989 phenols Chemical class 0.000 claims description 14
- 150000002334 glycols Chemical class 0.000 claims description 9
- 239000012978 lignocellulosic material Substances 0.000 claims description 7
- 229920002488 Hemicellulose Polymers 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 10
- 238000004537 pulping Methods 0.000 description 10
- 239000002023 wood Substances 0.000 description 10
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 3
- PETRWTHZSKVLRE-UHFFFAOYSA-N 2-Methoxy-4-methylphenol Chemical compound COC1=CC(C)=CC=C1O PETRWTHZSKVLRE-UHFFFAOYSA-N 0.000 description 2
- CHWNEIVBYREQRF-UHFFFAOYSA-N 4-Ethyl-2-methoxyphenol Chemical compound CCC1=CC=C(O)C(OC)=C1 CHWNEIVBYREQRF-UHFFFAOYSA-N 0.000 description 2
- HXDOZKJGKXYMEW-UHFFFAOYSA-N 4-ethylphenol Chemical compound CCC1=CC=C(O)C=C1 HXDOZKJGKXYMEW-UHFFFAOYSA-N 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 229930003836 cresol Natural products 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- LHGVFZTZFXWLCP-UHFFFAOYSA-N guaiacol Chemical compound COC1=CC=CC=C1O LHGVFZTZFXWLCP-UHFFFAOYSA-N 0.000 description 2
- 238000007327 hydrogenolysis reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- LPYUENQFPVNPHY-UHFFFAOYSA-N methoxycatechol Natural products COC1=CC=CC(O)=C1O LPYUENQFPVNPHY-UHFFFAOYSA-N 0.000 description 2
- IWDCLRJOBJJRNH-UHFFFAOYSA-N p-cresol Chemical compound CC1=CC=C(O)C=C1 IWDCLRJOBJJRNH-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 2
- -1 6 isomers) Chemical compound 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000000944 Soxhlet extraction Methods 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000019621 digestibility Nutrition 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229960001867 guaiacol Drugs 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
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】
皮呈上曳肌■公国
本発明は、木材、竹、わら等のリグノセルロース質物質
を有機溶媒中で加熱することにより、脱リグニンを行っ
てパルプ化する、いわゆる有ａ溶媒蒸解くオルガノソル
ブパルピング）によるパルプの製造法に関する。[Detailed description of the invention] Peeling and peeling ■ Principality The present invention is a method of delignifying and pulping lignocellulosic materials such as wood, bamboo, and straw by heating them in an organic solvent. This invention relates to a method for producing pulp by (a) organosolve pulping (solvent cooking).
皿米■及班
近年、従来の無機薬品を用いて蒸解を行うパルプ化に代
って、有ａ溶媒を蒸解液として用いて脱リグニンを行う
パルプ化（オルガノソルブバルビングと称せられる）に
関する方法が種々提案されている。In recent years, instead of the conventional pulping method that involves cooking using inorganic chemicals, a method for pulping that involves delignification using an aqueous solvent as the cooking liquid (referred to as organosolv valving) has been developed. Various proposals have been made.
一方、リグノセルロース物質から分離されたリグニンを
熱分解あるいは水素化分解することによって、フェノー
ル類及びグリコール類を主成分とする有機物が得られる
こともよく知られている。On the other hand, it is well known that organic substances containing phenols and glycols as main components can be obtained by thermally decomposing or hydrogenolyzing lignin separated from lignocellulosic materials.
そこで上記有機溶媒蒸解における蒸解液としてフェノー
ル類もしくはグリコール類の混合物を主成分として使用
し、その補給溶媒として、上記分離されたリグニンの熱
分解物あるいは水素化分解物を利用することから成るパ
ルプ化プロセスが考えられる。Therefore, pulping is achieved by using a mixture of phenols or glycols as the main component as the cooking liquor in the organic solvent cooking, and using the pyrolysis product or hydrogenolysis product of the separated lignin as the supplementary solvent. The process can be considered.
而して、上記フェノール性有機溶媒を蒸解液として用い
るパルプ化（有機溶媒蒸解）に際しての問題点は、蒸解
により脱リグニンされて得られるパルプと蒸解に用いた
有機溶媒の分離処理にある。The problem with pulping using the above-mentioned phenolic organic solvent as a cooking liquor (organic solvent cooking) lies in the separation process between the pulp obtained by delignification by cooking and the organic solvent used in cooking.
すなわち、蒸解後のパルプを漂白乃至は抄紙工程により
紙にするには、パルプと蒸解液の分離を十分に行うこと
が必要であるが、１解液として有ａ溶媒を用いるパルプ
化では、有機）容媒が常温の水に難溶性であるため、現
在のパルプ化の主流である無機薬品による蒸解の場合の
ように蒸解後のパルプを多量の水を使用して洗浄する蒸
解液の分離法は適用できない。このようなことから、パ
ルプから有機溶媒の洗浄分離に、水に易溶性の低級アル
コールを使用することが考えられるが、洗浄液からの低
級アルコールの回収を考慮すると工業上実用的とは言え
ない。In other words, in order to turn pulp after cooking into paper through bleaching or papermaking processes, it is necessary to sufficiently separate the pulp from the cooking liquor. ) Since the medium is poorly soluble in water at room temperature, this cooking liquor separation method uses a large amount of water to wash the pulp after cooking, as in the case of cooking with inorganic chemicals, which is the mainstream method of pulping today. is not applicable. For this reason, it is conceivable to use lower alcohols that are easily soluble in water to wash and separate organic solvents from pulp, but this cannot be said to be industrially practical when the recovery of lower alcohols from the washing liquid is considered.
ところで、上記有機溶媒が熱水に溶解することから、上
記パルプから有機溶媒を洗浄分離するのに熱水の使用が
最も好ましいと言える。By the way, since the organic solvent is dissolved in hot water, it is most preferable to use hot water to wash and separate the organic solvent from the pulp.
しかし、パルプの熱水による洗浄工程では、蒸煮チップ
中の有機溶媒が熱水との相互溶解により徐々に希釈され
、その際、該有機溶媒中に熔解していたリグニン等の分
解物は溶解性を失って蒸煮チップ内に残留するようにな
る。However, in the process of washing pulp with hot water, the organic solvent in the steamed chips is gradually diluted by mutual dissolution with the hot water, and at that time, decomposed products such as lignin dissolved in the organic solvent become soluble. will be lost and remain in the steamed chips.
したがって、このようにして得られたパルプでは蒸解・
洗浄後のパルプ中に残存するリグニン等の不要物質の程
度を表わす指標であるカッパー価。Therefore, the pulp obtained in this way is
Kappa number is an index that indicates the degree of unnecessary substances such as lignin remaining in the pulp after washing.
は、リグニン等に加えて、本来洗浄によりチップ外へ拡
散されるべき分解物までも含んだ大きな値を示すことに
なり、その結果、このパルプは脱リグニンの進んでいな
い低品位のパルプであるとの判定が与えられることにな
る。shows a large value that includes not only lignin, etc., but also decomposed products that should normally be diffused out of the chip by washing, and as a result, this pulp is a low-grade pulp that has not undergone delignification. A judgment will be given.
そのため、上記判定を受けたパルプの蒸解度を高めるべ
く更に時間をかけて蒸解を続ける場合には、脱リグニン
の進行と共にパルプを構成するセルロース等の炭水化物
の崩壊溶出をもきたし、パルプ収率の低下の原因となる
。Therefore, if the pulp subjected to the above judgment is continued to be cooked for a longer time in order to increase its digestibility, as delignification progresses, carbohydrates such as cellulose that make up the pulp will disintegrate and elute, resulting in a decrease in pulp yield. This causes a decrease in the temperature.
」が解決しようとする間 壱
本発明者は、有機溶媒蒸解によるパルプの製造における
上述した問題点に鑑み、蒸解後のパルプのリグニン分離
について検討した結果、蒸解の終了したパルプを、未使
用の新しい有機溶媒からなる蒸解液を用いて、蒸解での
温度よりも実質上低い温度で洗浄抽出することにより、
チップ並びに蒸解により得られたパルプ中に存在する、
既に可溶化されたリグニン等の不要物質をパルプ外へ有
効に拡散させて分離し得ることの知見を得て本発明をな
すに至った。In view of the above-mentioned problems in the production of pulp by organic solvent cooking, the inventors of the present invention investigated the separation of lignin from pulp after cooking, and found that it is possible to By washing and extracting using a cooking liquor consisting of a fresh organic solvent at a temperature substantially lower than that during cooking,
Present in the chips as well as the pulp obtained by cooking,
The present invention was made based on the knowledge that already solubilized unnecessary substances such as lignin can be effectively diffused out of the pulp and separated.
したがって、本発明は、有機溶媒を蒸解液とする有機溶
媒蒸解パルプ化法において、蒸解後のパルプ中に残留す
る、既に分解された可溶化リグニン等の不要物質を十分
にパルプ外へ拡散させて分離し、リグニン残存量の一層
少ないパルプを得ると共に蒸解時間も短縮し得るパルプ
の製造法を提供することを課題とする。Therefore, in the organic solvent cooking pulping method using an organic solvent as the cooking liquid, the present invention is capable of sufficiently diffusing unnecessary substances such as already decomposed solubilized lignin remaining in the pulp after cooking to the outside of the pulp. It is an object of the present invention to provide a method for producing pulp that can be separated to obtain pulp with a smaller amount of residual lignin and also shorten the cooking time.
以下本発明の詳細な説明する。The present invention will be explained in detail below.
衾凱至盪辰
本発明の特徴は、リグノセルロース質物質を、フェノー
ル類もしくはフェノール類とグリコール類の混合物或は
これと水との混合物からなる有機溶媒を蒸解液として用
いて１解してパルプ化するパルプの製造法において、蒸
解後のパルプを、未使用の新しい上記蒸解液を用いて蒸
解温度よりも実質上低い温度で洗浄抽出することにある
。A feature of the present invention is that a lignocellulosic material is pulped by decomposing a lignocellulosic material using an organic solvent consisting of phenols, a mixture of phenols and glycols, or a mixture of these and water as a cooking liquor. In the method for producing pulp, the pulp after cooking is washed and extracted using fresh, unused cooking liquor at a temperature substantially lower than the cooking temperature.
ここでいう“リグノセルロース質物質”とは、木材、竹
、わら等の通常パルプの原料として用いられる物質を意
味する。The term "lignocellulosic material" as used herein refers to materials commonly used as raw materials for pulp, such as wood, bamboo, and straw.
課題を解ンするための
本発明で蒸解液として用いる有機溶媒は、上述のように
、フェノール類もしくはフェノール類とグリコール類の
混合物或はこれと水との混合物であって、上記有機物質
と水との混合割合が５容量部：５容量部乃至１０容量部
：０容量部、好ましくは７容量部：３容量部から８容量
部：２容量部のものである。The organic solvent used as the cooking liquor in the present invention to solve the problem is, as mentioned above, a mixture of phenols or phenols and glycols, or a mixture of this and water, and the organic solvent is a mixture of the above organic substance and water. The mixing ratio is 5 parts by volume: 5 parts by volume to 10 parts by volume: 0 parts by volume, preferably 7 parts by volume: 3 parts by volume to 8 parts by volume: 2 parts by volume.
上記有機溶媒からなる蒸解液は、原料としてのリグノセ
ルロース質物質（以下木材等と称する）の細片（以下チ
ップと称する） １ｋｇに対し、４〜６１の液比で用い
、耐圧容器中でチップを蒸煮して蒸解を行う。この際の
、蒸解温度は１５０℃〜２００℃好ましくは１６０℃〜
１９０℃、更に好ましくは１７５°Ｃ〜１８５℃であり
、また、蒸解時間は、パルプの使用目的により必要とさ
れる脱すグニン度を考慮して決められる。The cooking liquor consisting of the above organic solvent is used at a liquid ratio of 4 to 61 to 1 kg of lignocellulosic material (hereinafter referred to as wood etc.) pieces (hereinafter referred to as chips) as a raw material, and the chips are placed in a pressure container. Cook by steaming. At this time, the cooking temperature is 150°C to 200°C, preferably 160°C to
The temperature is 190°C, more preferably 175°C to 185°C, and the cooking time is determined in consideration of the degree of gunin removal required depending on the intended use of the pulp.
なお、蒸解液として用いる有機溶媒には、前述した如く
、リグニンもしくはリグニンとヘミセルロースを熱分解
又は水素化分解によって得られるフェノール類を主成分
として含有する留分と水との混合物を使用することがで
きる。上記留分にはリグニン類のほかにグリコール類も
含有するものもあるので、工業的には該留分を用いるの
が得策である。As described above, the organic solvent used as the cooking liquor may be a mixture of water and a distillate containing phenols as a main component obtained by thermal decomposition or hydrogenolysis of lignin or lignin and hemicellulose. can. Since some of the above-mentioned fractions contain glycols in addition to lignins, it is advisable to use these fractions from an industrial perspective.
上記フェノール類としては、フェノール、０−ｌｍ−及
びｐ−クレゾール、０−ｌｍ−及びｐ−エチルフェノー
ル、キシレノール（６個の異性体を含む）、パラノルマ
ルプロとルフェノール、グアヤコール、クレオゾール、
４−エチルグアヤコール、カテコール及びメトキシカテ
コール等を例示でき、グリコール類としてはエチレング
リコール等を例示し得る。The above-mentioned phenols include phenol, 0-lm- and p-cresol, 0-lm- and p-ethylphenol, xylenol (including 6 isomers), paranormal pro- and lphenol, guaiacol, creosol,
Examples include 4-ethylguaiacol, catechol, and methoxycatechol, and examples of glycols include ethylene glycol.
本発明は、上述のようにして蒸解したチップ、すなわち
、蒸解により得られたパルプを未使用の新しい上記有機
溶媒からなる蒸解液を用いて、上記蒸解温度より低い温
度、すなわち１５０℃未満である１００℃〜１４０℃、
好ましくは１１０℃〜１３０℃で洗浄抽出して、パルプ
中に存在する、蒸解により可溶化されたリグニン等の分
解物をパルプ外へ拡散させて分離させるものである。In the present invention, the chips cooked as described above, that is, the pulp obtained by cooking, are heated to a temperature lower than the above-mentioned cooking temperature, that is, less than 150° C., using a cooking liquor made of an unused fresh organic solvent as described above. 100℃～140℃,
Preferably, washing and extraction is carried out at 110° C. to 130° C. to diffuse and separate decomposed products such as lignin, which are present in the pulp and have been solubilized by cooking, out of the pulp.
本発明に従って、蒸解後のチップ（パルプ）を上述のよ
うにして新しい蒸解液で洗浄抽出すると、チップ内と外
の濃度差が大きくなって、チップ内に存在する可溶化さ
れたリグニン等の分解物が効率よくチップ外へ拡散して
分離されるようになる。According to the present invention, when the chips (pulp) after cooking are washed and extracted with fresh cooking liquor as described above, the concentration difference between inside and outside of the chips becomes large, and the solubilized lignin etc. present in the chips is decomposed. Materials can be efficiently diffused out of the chip and separated.
したがって、残留リグニン量の少ないパルプが得られる
ので、従来のように、更に時間をかけて蒸解を行う必要
はなく、結果的に蒸解時間を短縮することが可能となる
。Therefore, since a pulp with a small amount of residual lignin can be obtained, there is no need to spend additional time on cooking as in the conventional method, and as a result, the cooking time can be shortened.
更に、また上記蒸解液での洗浄抽出温度も蒸解温度より
低いので、パルプと蒸解液との高温度での接触によるパ
ルプ中の炭水化物の崩壊溶出量も著しく低減し、パルプ
の収率も向上するようになる。Furthermore, since the washing and extraction temperature with the cooking liquor is lower than the cooking temperature, the amount of carbohydrates disintegrated and eluted from the pulp due to contact between the pulp and the cooking liquor at high temperatures is significantly reduced, and the pulp yield is also improved. It becomes like this.
畝上のとおり、本発明によると、従来、有機溶媒蒸解に
よるパルプ化法にみられる問題点が解消されるので、本
発明は、上記パルプ化の工業化に役立つものと言える。As mentioned above, according to the present invention, the problems seen in the conventional pulping method using organic solvent cooking are solved, so it can be said that the present invention is useful for the industrialization of the above-mentioned pulping.
以下実施例を示して本発明を更に具体的に説明する。な
お、実施例中に比較例として示したパルプ収率は下記の
実験に基づいて求めた。The present invention will be explained in more detail below with reference to Examples. In addition, the pulp yield shown as a comparative example in an Example was calculated|required based on the following experiment.
実験方法：
組成がトリクレゾール８容量対水２容！（Ｓ／Ｗ ：８
／２）である蒸解薬液５１と木材チップ１ｋｇとをオー
トクレーブ中で１８５℃、３時間蒸煮する。得られたパ
ルプをメチルアルコールでソックスレー抽出することに
より、パルプ中の有ｎ？８媒を除去する。パルプのカッ
パー価は３４．９であり、パルプ収率は５２．１％（対
チップ）であった。同様の１解反応を反応時間のみを変
化させて行い、得られたパルプをアルコール洗浄し、カ
ッパー価とパルプ収率の相関を添付図に示した。図中・
印は１８５℃、ム印は１７５℃の反応温度での結果であ
る。Experimental method: Composition: 8 volumes of tricresol to 2 volumes of water! (S/W: 8
/2) Cooking chemical solution 51 and 1 kg of wood chips are steamed at 185° C. for 3 hours in an autoclave. By Soxhlet extraction of the obtained pulp with methyl alcohol, the content of n? 8 Remove the medium. The Kappa number of the pulp was 34.9, and the pulp yield was 52.1% (based on chips). A similar one-solution reaction was carried out by changing only the reaction time, and the resulting pulp was washed with alcohol, and the correlation between kappa number and pulp yield is shown in the attached figure. In the diagram・
The mark indicates the result at a reaction temperature of 185°C, and the mark indicates the result at a reaction temperature of 175°C.
実施例１
トリクレゾール（Ｓ）と水（葬）を８＝２の割合で混合
した混合物を蒸解液として木材チップ１ｋｇに対して５
１を用いて１８５℃、２時間の蒸解を行い、蒸解直後の
パルプを蒸解液と同一組成の未使用溶媒を用いて１３０
℃、７５分間洗浄抽出した。熱水洗浄によってパルプ中
のクレゾール量はガスクロマトグラフで定量できない程
度まで洗浄しく以下、熱水洗浄という）、得られたパル
プのカッパー価は３３．８であり、パルプ収率は５３．
６％（対チップ）であった。Example 1 A mixture of tricresol (S) and water (Soru) in a ratio of 8 = 2 was used as a cooking liquid at a rate of 5 to 1 kg of wood chips.
1 for 2 hours at 185°C, and the pulp immediately after cooking was cooked at 130°C using an unused solvent with the same composition as the cooking liquor.
Wash extraction was performed at ℃ for 75 minutes. By hot water washing, the amount of cresol in the pulp was washed to such an extent that it could not be determined by gas chromatography (hereinafter referred to as hot water washing), and the kappa number of the obtained pulp was 33.8, and the pulp yield was 53.
It was 6% (based on chips).
従来の蒸解法によるカッパー価３３．８に相当するパル
プ収率を添付図から求めると５１．６％（対チップ）で
あり、本発明の実施によりパルプ収率は２．０％（対チ
ップ）向上したことがわかる。The pulp yield corresponding to a Kappa number of 33.8 by the conventional cooking method is found from the attached diagram to be 51.6% (based on chips), and by implementing the present invention, the pulp yield is 2.0% (based on chips). I can see that I have improved.
一方、比較例として、上記蒸解直後のパルプを熱水洗浄
して、カッパー価を測定した結果、８２．１であった。On the other hand, as a comparative example, the pulp immediately after cooking was washed with hot water and the kappa number was measured, and the result was 82.1.
したがって、本発明の実施によりカッパー価の値にして
４８．３ポイントのダウンが可能になることが認められ
る。Therefore, it is recognized that by implementing the present invention, it is possible to reduce the kappa value by 48.3 points.
実施例２
Ｓ／Ｗ ； ７／３のトリクレゾールと水との混合物を
蒸解液として木材チップ１ｋｇに対し７７！用いて１８
５℃、１時間の蒸解を行い、蒸解直後のパルプを蒸解液
と同一組成の未使用溶媒を用いて１４Ｂ”Ｃ１６０分間
洗浄抽出した。熱水洗浄後得られたパルプのカッパー価
は５９．１であり、パルプ収率は５９．６％（対チップ
）であった。Example 2 S/W; 77% for 1 kg of wood chips using a mixture of 7/3 tricresol and water as the cooking liquid! using 18
Cooking was carried out at 5°C for 1 hour, and the pulp immediately after cooking was washed and extracted for 160 minutes using an unused solvent with the same composition as the cooking liquor.The Kappa number of the pulp obtained after washing with hot water was 59.1. The pulp yield was 59.6% (based on chips).
従来の蒸解法によるカッパー価５９．１に相当するパル
プ収率を添付図から求めると５８．４％（対チップ）で
あり、本発明の実施によりパルプ収率は１．２％（対チ
ップ）向上した。The pulp yield corresponding to a Kappa number of 59.1 according to the conventional cooking method is 58.4% (based on chips) when calculated from the attached diagram, and by implementing the present invention, the pulp yield is 1.2% (based on chips). Improved.
一方、比較例として、上記蒸解直後のパルプを熱水洗浄
して、カッパー価を測定した結果、１０４．０であった
。したがって、本発明の実施によりカッパー価の値にし
て４４．９ポイントのダウンが可能になる。On the other hand, as a comparative example, the pulp immediately after cooking was washed with hot water and the kappa number was measured, and the result was 104.0. Therefore, by implementing the present invention, it is possible to reduce the kappa value by 44.9 points.
実施例３
Ｓ／Ｗ ； ８／２のトリクレゾールと水との混合物を
蒸解液として木材チップ１ｋｇに対し９１用いて１８５
℃、２時間の蒸解を行い、蒸解直後のパルプを蒸解液と
同一組成の未使用溶媒を用いて１４８℃、４５分間洗浄
抽出した。熱水洗浄後得られたパルプのカッパー価は３
５．４であり、パルプ収率は５３．３％（対チップ）で
あった。Example 3 S/W; 8/2 mixture of tricresol and water was used as the cooking liquid for 1 kg of wood chips to give 185
Cooking was carried out at 148°C for 2 hours, and the pulp immediately after cooking was washed and extracted using an unused solvent having the same composition as the cooking liquor at 148°C for 45 minutes. The kappa number of the pulp obtained after washing with hot water is 3.
5.4, and the pulp yield was 53.3% (based on chips).
従来の蒸解法によるカッパー価３５．４に相当するパル
プ収率を添付図から求めると５２．０％（対チップ）で
あり、本発明の実施によりパルプ収率は１．３％（対チ
ップ）向上した。The pulp yield corresponding to a kappa number of 35.4 according to the conventional cooking method is 52.0% (based on chips) when calculated from the attached diagram, and by implementing the present invention, the pulp yield is 1.3% (based on chips). Improved.
一方、比較例として、上記蒸解直後のパルプを熱水洗浄
して、カッパー価を測定した結果、８２．２であった。On the other hand, as a comparative example, the pulp immediately after cooking was washed with hot water and the kappa number was measured, and the result was 82.2.
したがって、本発明の実施によりカッパー価の値にして
４６．８ポイントのダウンが可能になる。Therefore, by implementing the present invention, it is possible to reduce the kappa value by 46.8 points.
実施例４
Ｓ／Ｗ ； ７ノ３のトリクレゾールと水との混合物を
蒸解液として木材チップＩｋｇに対して６１用いて、１
７５℃、３時間の蒸解を行い、蒸解直後のパルプを蒸解
液と同一組成の未使用溶媒を用いて１４８℃、４５分間
洗浄抽出した。熱水洗浄後得られたパルプのカッパー価
は５４．１であり、パルプ収率は５９．５％（対チップ
）であった。Example 4 S/W: A mixture of 7 to 3 tricresol and water was used as the cooking liquid for 61 kg of wood chips, and 1
Cooking was carried out at 75°C for 3 hours, and the pulp immediately after cooking was washed and extracted at 148°C for 45 minutes using an unused solvent having the same composition as the cooking liquor. The Kappa number of the pulp obtained after washing with hot water was 54.1, and the pulp yield was 59.5% (based on chips).
従来の蒸解法によるカッパー価５４．１に相当するパル
プ収率を添付図から求めると５７．０％（対チップ）で
あり、本発明の実施によりパルプ収率は２．５％（対チ
ップ）向上した。The pulp yield corresponding to a Kappa number of 54.1 according to the conventional cooking method is 57.0% (based on chips) when calculated from the attached diagram, and by implementing the present invention, the pulp yield is 2.5% (based on chips). Improved.
一方、比較例として、上記蒸解直後のパルプを熱水洗浄
して、カッパー価を測定した結果、１００．０であった
。したがって、本発明の実施によりカッパー価の値にし
て４５．９ポイントのダウンが可能になる。On the other hand, as a comparative example, the pulp immediately after cooking was washed with hot water and the kappa number was measured, and the result was 100.0. Therefore, by implementing the present invention, it is possible to reduce the kappa value by 45.9 points.
実施例５
Ｓ／Ｗ ； ９／１のトリクレゾールと水との混合物を
蒸解液として木材１ｋｇに対して６１用いて１７５℃、
４時間の蒸解を行い、蒸解直後のパルプを蒸解液と同一
組成の未使用溶媒を用いて１４８℃、４５分間洗浄抽出
した。熱水洗浄後得られたパルプのカッパー価は４３．
２ 、パルプ収率は５６．１％（対チップ）であった。Example 5 S/W: 9/1 mixture of tricresol and water was used as cooking liquid at 175°C using 61% for 1 kg of wood.
Cooking was carried out for 4 hours, and the pulp immediately after cooking was washed and extracted using an unused solvent having the same composition as the cooking liquor at 148° C. for 45 minutes. The kappa number of the pulp obtained after hot water washing was 43.
2. The pulp yield was 56.1% (based on chips).
従来の蒸解法によるカッパー価４３．２に相当するパル
プ収率を添付図から求めると５４．０％（対チップ）で
あり、本発明の実施によりパルプ収率は２．１％（対チ
ップ）向上した。The pulp yield corresponding to a Kappa number of 43.2 according to the conventional cooking method is found to be 54.0% (based on chips) from the attached diagram, and by implementing the present invention, the pulp yield is 2.1% (based on chips). Improved.
一方、比較例として、上記蒸解直後のパルプを熱水洗浄
して、カッパー価を測定した結果、８８．６であった。On the other hand, as a comparative example, the pulp immediately after cooking was washed with hot water and the kappa number was measured, and the result was 88.6.
したがって、本発明の実施によりカッパー価の値にして
４５．４ポイントのダウンが可能になる。Therefore, by implementing the present invention, it is possible to reduce the kappa value by 45.4 points.
実施例６
Ｓ／Ｗ ； ８／２の混合有機溶媒と水との混合物を蒸
解液として木材１ｋｇに対して５Ｉｌ用いて１８５℃、
３時間の蒸解を行った。混合有機溶媒の組成はフェノー
ル２０容量部、クレゾール５０容量部、２，４．キシレ
ノール２０容量部、テトラリン１０容量部である。Example 6 S/W: A mixture of 8/2 mixed organic solvent and water was used as a cooking liquid at 185° C. using 5 Il per 1 kg of wood.
Cooking was carried out for 3 hours. The composition of the mixed organic solvent is 20 parts by volume of phenol, 50 parts by volume of cresol, 2.4 parts by volume. 20 parts by volume of xylenol and 10 parts by volume of tetralin.
蒸解直後のパルプを蒸解液と同一組成の未使用溶媒を用
いて１４８℃、４５分間洗浄抽出した。熱水洗浄後得ら
れたパルプのカッパー価は２７．３ 、パルプ収率は５
１．０％（対チップ）であった。The pulp immediately after cooking was washed and extracted using an unused solvent having the same composition as the cooking liquor at 148°C for 45 minutes. The kappa number of the pulp obtained after hot water washing was 27.3, and the pulp yield was 5.
It was 1.0% (based on chips).
従来の蒸解法によるカッパー価２７，３に相当するパル
プ収率を添付図から求めると４９．０％（対チップ）で
あり、本発明の実施によりパルプ収率は２．０％（対チ
ップ）向上した。The pulp yield corresponding to a kappa number of 27.3 according to the conventional cooking method is 49.0% (based on chips) when calculated from the attached diagram, and by implementing the present invention, the pulp yield is 2.0% (based on chips). Improved.
一方、比較例として、上記蒸解直後のパルプを熱水洗浄
して、カッパー価を測定した結果、６５．０％であった
。したがって、本発明の実施によりカッパー価の値にし
て３７．７ポイントのダウンが可能になる。On the other hand, as a comparative example, the pulp immediately after cooking was washed with hot water and the kappa number was measured, and the result was 65.0%. Therefore, by implementing the present invention, it is possible to reduce the kappa value by 37.7 points.
添付図は、パルプ収率とカッパー価との関係を示したも
のである。The attached figure shows the relationship between pulp yield and kappa number.
Claims (5)
はフェノール類とグリコール類の混合物或はこれと水と
の混合物からなる有機溶媒を蒸解液として用いて蒸解し
てパルプ化するパルプの製造法において、蒸解して得ら
れたパルプを、未使用の新しい上記蒸解液を用いて蒸解
温度よりも実質上低い温度で洗浄することにより上記パ
ルプ中に存在するリグニン等の分解物を分離、除去する
ことを特徴とするパルプの製造法。(1) A method for producing pulp in which a lignocellulosic material is pulped by cooking it using an organic solvent consisting of phenols, a mixture of phenols and glycols, or a mixture of these and water as a cooking liquor. The method is characterized in that decomposition products such as lignin present in the pulp are separated and removed by washing the pulp obtained by washing the pulp with fresh unused cooking liquor at a temperature substantially lower than the cooking temperature. A method for producing pulp.
混合物が、リグニンもしくはリグニンとヘミセルロース
の熱分解物または水素化分解物である特許請求の範囲第
（１）項記載のパルプの製造法。(2) The method for producing pulp according to claim (1), wherein the phenols and the mixture of phenols and glycols are lignin or a thermally decomposed product or a hydrogenated product of lignin and hemicellulose.
グリコール類の混合物と水とを５容量部：５容量部乃至
１０容量部：０容量部の割合、好ましくは７容量部：３
容量部乃至８容量部：２容量部の割合で混合してなる有
機溶媒である特許請求の範囲第（１）項記載のパルプの
製造法。(3) The cooking liquor contains phenols or a mixture of phenols and glycols and water in a ratio of 5 parts by volume: 5 parts by volume to 10 parts by volume: 0 parts by volume, preferably 7 parts by volume: 3 parts by volume.
The method for producing pulp according to claim (1), wherein the organic solvent is mixed in a ratio of 8 parts by volume to 2 parts by volume.
〜１８５℃で行う特許請求の範囲第（１）項記載のパル
プの製造法。(4) Cooking at 150°C to 200°C, preferably 175°C
The method for producing pulp according to claim (1), which is carried out at a temperature of 185°C to 185°C.
の温度、好ましくは１１０℃〜１３０℃で行う特許請求
の範囲第（１）項記載のパルプの製造法。(5) The method for producing pulp according to claim (1), wherein the pulp obtained by cooking is washed at a temperature below 150°C, preferably from 110°C to 130°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5985286A JPS62223385A (en) | 1986-03-18 | 1986-03-18 | Production of pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5985286A JPS62223385A (en) | 1986-03-18 | 1986-03-18 | Production of pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62223385A true JPS62223385A (en) | 1987-10-01 |
Family
ID=13125137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5985286A Pending JPS62223385A (en) | 1986-03-18 | 1986-03-18 | Production of pulp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62223385A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5836289A (en) * | 1981-08-06 | 1983-03-03 | ケミフア−ゼル・レンツイング・アクテイエンゲゼルシヤフト | Production of cellulose with low lignin content |
| JPS5865091A (en) * | 1981-10-14 | 1983-04-18 | 榊原 彰 | Production of pulp |
-
1986
- 1986-03-18 JP JP5985286A patent/JPS62223385A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5836289A (en) * | 1981-08-06 | 1983-03-03 | ケミフア−ゼル・レンツイング・アクテイエンゲゼルシヤフト | Production of cellulose with low lignin content |
| JPS5865091A (en) * | 1981-10-14 | 1983-04-18 | 榊原 彰 | Production of pulp |
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