EP0136325A1 - Procede de traitement de matieres ligno-cellulosique pour l'obtention de cellulose. - Google Patents
Procede de traitement de matieres ligno-cellulosique pour l'obtention de cellulose.Info
- Publication number
- EP0136325A1 EP0136325A1 EP84900991A EP84900991A EP0136325A1 EP 0136325 A1 EP0136325 A1 EP 0136325A1 EP 84900991 A EP84900991 A EP 84900991A EP 84900991 A EP84900991 A EP 84900991A EP 0136325 A1 EP0136325 A1 EP 0136325A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooking
- wood
- water
- impregnation
- weight
- 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
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
Definitions
- the wood is treated with aqueous chemical solutions such as alkali or alkaline earth salts of sulfuric acid or sulfurous acid.
- the black liquor by-product must be evaporated to reach a concentration of around 50% dry matter, allowing combustion and recovery of the chemicals. Hence an important energy expenditure taking into account the mass of water used.
- the process according to the invention makes it possible to avoid most of the drawbacks mentioned above by cooking the wood chips at atmospheric pressure or under low pressure in solid phase after impregnation of a chemical reagent.
- This solid phase cooking is the essential characteristic of the invention. She permits:
- the process in this case comprises the following phases: I / Impregnation. It is particularly important for the success of the following phases.
- the impregnation liquid is water containing solvent such as glycol, diols, ethanolamine, etc. at a percentage of 2 to 20%; alkaline chemical reagents such as sodium carbonate, sodium hydroxide, sodium sulphide or sodium polysulphide, etc. or alkaline earth soluble in water at a percentage of 2 to 20%.
- solvent such as glycol, diols, ethanolamine, etc. at a percentage of 2 to 20%
- alkaline chemical reagents such as sodium carbonate, sodium hydroxide, sodium sulphide or sodium polysulphide, etc. or alkaline earth soluble in water at a percentage of 2 to 20%.
- This impregnation is preferably carried out at a temperature in the region of 100 ° C., so as to ensure penetration of the impregnation liquor to the core.
- the impregnated shavings are drained, then the solid mass is introduced into an oven where it moves by gravity, either by mechanical means (for example, under a thickness of a few centimeters on a metal mat moving inside the oven) .
- the wood shavings still containing the solvent in a low percentage and the chemical reagents are then brought to 150-190 ° C, at atmospheric pressure for a variable time (15 to 30 ', for example).
- the shavings coming out of the oven are added with the minimum amount of water to obtain a paste.
- This paste is pressed in a conventional device of the screw press type.
- the advantage of adding the minimum quantity of water is to obtain a concentrated black liquor which is easier to bring to dryness or which can be directly burned to recover the alkaline reagents.
- the complete extraction with water of the solubilized lignin is carried out by successive pressing, preferably by recycling each time the liquor extracted in the preceding extraction stage.
- the washed cellulose pulp is treated according to conventional purification and bleaching processes.
- the amount of water used is low and the recovery of latent heat from water vapor easy in the drying phase of the wood after impregnation.
- Another important element is the elimination of the concentration phase of the black liquor.
- the main positions are:
- the solvent to wood ratio is approximately I / 10 ° that of a solvent phase process.
- An aqueous solution is made with Water 900 g. Glycol I00 g.
- the weight is after draining of 915 g.
- the wood therefore absorbed 655 g. of solution.
- the mass of impregnated shavings is then brought into an oven at a temperature of 180 ° C. for 45 '.
- a paste is obtained from which a thick black liquor, about 120 g., Containing about 50% dry matter, can be extracted by hot pressing.
- the remaining dough is treated 3 times using the same technique, each time extracting a less concentrated black liquor.
- the successive filtrates could be recycled in the previous washing so as to finally obtain only a concentrated black liquor.
- a solution is made containing: Water 900 g. Soda 100 g.
- the preferred apparatus according to the invention for carrying out the cooking consists of a metal cylinder into which the impregnated and drained shavings are introduced.
- the cylinder is closed and the heating carried out from the outside, while the cylinder placed horizontally rotates around its axis.
- the characteristic further processing phase of the invention consists of rapid grinding requiring low mechanical energy which transforms the cooked chip into elementary fibers.
- the shavings are drained on a sieve and then weighed.
- the weight is 632 g., Or 401.7 g. da chosen solution.
- These chips are introduced into a cylinder which they almost completely fill. After closing, it is rotated in an enclosure heated to 170 ° C. during I, H 30.
- I93 g. dry counted chips are introduced into a solution containing sodium hydroxide and possibly glycol.
- the impregnation is carried out at 95 ° C. for variable times.
- the chips are drained and introduced into an externally heated steel cylinder. Heating time at I70 ° C.: I H.
- the chips After cooking, the chips are finely ground and the resulting paste is pressed, which provides a concentrated black liquor.
- the remaining dough is treated with water, pressed again and refined.
- Another characteristic of the process is to be able to use other lignocellulosic materials.
- the pressing carried out with conventional means of the screw press type leaves a compact product with a dry appearance and containing from 1 to 2 times its weight of water relative to the dry raw material used.
- the paper obtained is of good quality and its weak coloring makes bleaching easy.
- the impregnated mass is drained. Its weight is then 848 g.
- This mass is pressed fully onto a hand-operated screw tray.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84900991T ATE44058T1 (de) | 1983-03-02 | 1984-02-29 | Verfahren zur behandlung von lignocellulosematerialien fuer die erlangung von cellulose. |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8303415A FR2542021B3 (fr) | 1983-03-02 | 1983-03-02 | Procede de traitement du bois ou autre matiere ligno-cellulosique pour l'obtention de pate cellulosique - papier ou carton - produits chimiques |
FR8303415 | 1983-03-02 | ||
FR8312845A FR2550243B2 (fr) | 1983-08-04 | 1983-08-04 | Procede de traitement du bois ou autre matiere ligno-cellulosique pour l'obtention de pate cellulosique - produits chimiques |
FR8312845 | 1983-08-04 | ||
FR8314060A FR2551476B2 (fr) | 1983-09-02 | 1983-09-02 | Procede de traitement du bois ou autre matiere ligno-cellulosique pour l'obtention de pate cellulosique-papier ou carton-produits chimiques |
FR8314060 | 1983-09-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0136325A1 true EP0136325A1 (fr) | 1985-04-10 |
EP0136325B1 EP0136325B1 (fr) | 1989-06-14 |
Family
ID=27251149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84900991A Expired EP0136325B1 (fr) | 1983-03-02 | 1984-02-29 | Procede de traitement de matieres ligno-cellulosique pour l'obtention de cellulose. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4790905A (fr) |
EP (1) | EP0136325B1 (fr) |
AU (1) | AU595477B2 (fr) |
DE (1) | DE3478701D1 (fr) |
WO (1) | WO1984003527A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5478439A (en) * | 1990-12-17 | 1995-12-26 | Tag Pulp Industries S.A. | Method for feeding cellulose pulp mixture to a pressurized continuous digester |
US10054922B2 (en) | 2013-05-29 | 2018-08-21 | Iprotoxi Oy | Apparatus and a system for controlling sensors |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5788812A (en) * | 1985-11-05 | 1998-08-04 | Agar; Richard C. | Method of recovering furfural from organic pulping liquor |
FR2639370B1 (fr) * | 1988-11-21 | 1995-04-21 | Tag Pulp Ind Sa | Procede et installation de cuisson en phase solide de matieres lignocellulosiques |
FR2661696B1 (fr) * | 1990-05-07 | 1992-07-10 | Tag Pulp Ind | Procede et installation de cuisson avec prechauffage de matieres ligno-cellulosiques en phase solide. |
US5641385A (en) * | 1995-01-17 | 1997-06-24 | The Dow Chemical Company | Use of ethyleneamine for washing pulp containing lignin |
FI122838B (fi) * | 2005-03-31 | 2012-07-31 | Metso Paper Inc | Menetelmä massan valmistamiseksi lignoselluloosamateriaalista |
FI122815B (fi) * | 2005-04-18 | 2012-07-13 | Cerefi Oy | Menetelmä lignoselluloosamateriaalien ja niistä saatujen jakeiden fraktioimiseksi |
US9328457B2 (en) | 2008-12-05 | 2016-05-03 | Valagro Carbone Renouvelable Poitou-Charentes | Process for the production of an intermediate product intended for the production of ethanol and for the production of lignin |
FR2939431B1 (fr) * | 2008-12-05 | 2011-01-28 | Valagro Carbone Renouvelable | Procede de production d'un produit intermediaire destine a la production d'ethanol, et produit intermediaire obtenu. |
FR2939446B1 (fr) * | 2008-12-05 | 2011-04-22 | Valagro Carbone Renouvelable | Utilisation de coton recycle pour produire de l'ethanol, et procede de production. |
DE102009017051A1 (de) * | 2009-04-09 | 2010-10-21 | Zylum Beteiligungsgesellschaft Mbh & Co. Patente Ii Kg | Verfahren zur Gewinnung von Zellstoff aus Lignocellulose-haltiger Biomasse |
CN107513875A (zh) * | 2017-09-04 | 2017-12-26 | 天津容业达科技发展有限公司 | 一种弱碱法提取稻麦秸秆纤维的工艺 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1735013A (en) * | 1928-06-01 | 1929-11-12 | Brown Co | Process of pulping raw cellulosic material |
US2218479A (en) * | 1936-10-21 | 1940-10-15 | Floyd C Peterson | Pulping process |
FR989191A (fr) * | 1944-09-07 | 1951-09-05 | Traitement Chimique Des Vegeta | Procédé de traitement des matières fibreuses, plus particulièrement des végétaux en vue de l'obtention de la cellulose |
US2874044A (en) * | 1955-12-23 | 1959-02-17 | Wenzl Hermann Franz Joseph | Multistage process relating to the alkaline digestion of raw cellulosic materials for the production of pulp with a high content of alpha cellulose |
US3255071A (en) * | 1963-10-25 | 1966-06-07 | Theodor N Kleinert | Process for production of alkali cellulose in the absence of an aqueous liquid phase |
CA871041A (en) * | 1967-03-31 | 1971-05-18 | G. Rickey Robert | Alkaline-solvent wood pulping |
US4135967A (en) * | 1969-09-26 | 1979-01-23 | Societe Generale De Brevets Industriels Et Ohimiques | Process for producing cellulose pulp by solid phase digestion |
US3664918A (en) * | 1969-12-09 | 1972-05-23 | Pulp Paper Res Inst | Vapor phase pulping of water saturated lignocellulosic materials |
US4091749A (en) * | 1975-01-02 | 1978-05-30 | Macmillan Bloedel Limited | Alkaline pulping of lignocellulosic material with amine pretreatment |
FR2300149A1 (fr) * | 1975-02-07 | 1976-09-03 | Visch Khim T | Procede et appareil pour l'obtention de matieres fibreuses |
US4017642A (en) * | 1975-07-28 | 1977-04-12 | George O. Orth | Process of making food for ruminant animals from wood and/or woody products |
US4248663A (en) * | 1978-07-05 | 1981-02-03 | Pulp And Paper Research Institute Of Canada | Pulping with an alkaline liquor containing a cyclic keto compound and an amino compound |
CA1132763A (fr) * | 1978-10-25 | 1982-10-05 | Harry H. Holton | Emploi de composes cycliques a fonctions cetoniques comme additifs en phase vapeur lors du traitement de la pate a papier |
FR2459326A1 (fr) * | 1979-06-14 | 1981-01-09 | Nivelleau Bruniere Patrick M F | Procede de traitement du bois pour l'obtention de pate cellulosique, papier ou carton, produits chimiques |
EP0054015B1 (fr) * | 1980-11-20 | 1985-01-16 | Simmering-Graz-Pauker Aktiengesellschaft | Procédé et appareil pour la production de cellulose |
US4552616A (en) * | 1982-10-20 | 1985-11-12 | New Fibers International Inc. | Pulping process pretreatment using a lower alkanolamine in the presence of ammonium hydroxide |
-
1984
- 1984-02-29 DE DE8484900991T patent/DE3478701D1/de not_active Expired
- 1984-02-29 WO PCT/FR1984/000042 patent/WO1984003527A1/fr active IP Right Grant
- 1984-02-29 EP EP84900991A patent/EP0136325B1/fr not_active Expired
- 1984-02-29 AU AU25756/84A patent/AU595477B2/en not_active Ceased
-
1986
- 1986-10-10 US US06/918,612 patent/US4790905A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO8403527A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5478439A (en) * | 1990-12-17 | 1995-12-26 | Tag Pulp Industries S.A. | Method for feeding cellulose pulp mixture to a pressurized continuous digester |
US10054922B2 (en) | 2013-05-29 | 2018-08-21 | Iprotoxi Oy | Apparatus and a system for controlling sensors |
Also Published As
Publication number | Publication date |
---|---|
AU595477B2 (en) | 1990-04-05 |
EP0136325B1 (fr) | 1989-06-14 |
US4790905A (en) | 1988-12-13 |
AU2575684A (en) | 1984-09-28 |
DE3478701D1 (en) | 1989-07-20 |
WO1984003527A1 (fr) | 1984-09-13 |
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