EP3472383A1 - Method for producing a fibrous material - Google Patents
Method for producing a fibrous materialInfo
- Publication number
- EP3472383A1 EP3472383A1 EP17724804.4A EP17724804A EP3472383A1 EP 3472383 A1 EP3472383 A1 EP 3472383A1 EP 17724804 A EP17724804 A EP 17724804A EP 3472383 A1 EP3472383 A1 EP 3472383A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chemicals
- refiner
- mixture
- sodium sulfite
- sodium bisulfite
- 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
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 239000002657 fibrous material Substances 0.000 title abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 27
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 14
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims abstract description 12
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims abstract description 12
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000002023 wood Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract 2
- 238000005470 impregnation Methods 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
- 229920001131 Pulp (paper) Polymers 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012978 lignocellulosic material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
-
- 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
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
-
- 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
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
- D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
- D21C3/12—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites sodium bisulfite
-
- 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
- D21C3/26—Multistage processes
- D21C3/266—Multistage processes the same pulping agent being used in all stages
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/007—Modification of pulp properties by mechanical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
Definitions
- the invention relates to a process for the production of fibrous lignocellulose from wood, preferably in the form of wood chips, wherein the lignocellulosic material is impregnated by chemicals from a mixture of sodium sulfite and sodium bisulfite and then subjected to a crushing process in a refiner.
- Methods for producing high yield pulp are e.g. known from CA 1051618.
- Bisulfite can be used in the pretreatment stage but also in the
- Free S0 2 can also condense with water vapor and produce corrosion on colder parts of the apparatus. At the higher pH
- Refining plates come through calcium salts. At lower pH values can be
- the aim of the invention is to avoid corrosion on the one hand and formation of deposits on the refiner plates on the other. This is achieved by additionally introducing chemicals from a mixture of sodium sulfite and sodium bisulfite directly into the refiner. This allows the conditions of addition to the impregnation and in the refiner
- An advantageous development of the invention is characterized in that the chemicals with a pH of 6.0 to 7.5, preferably from 6.5 to 7.0, are fed to the impregnation. This can be done with the corrosion
- a favorable embodiment of the invention is characterized in that the chemicals having a pH of 4.0-5.5, preferably 4.2-4.5, are added to the refiner. This allows the formation of deposits on the refiner plates can be greatly reduced or avoided, thereby significantly extending the life of the plates, resulting in enormous cost savings. Also, the salt formation, in particular of calcium salts, thereby substantially avoided.
- An advantageous embodiment of the invention is characterized in that 60-80% of the chemicals are added to the impregnation and 20-40% of the chemicals in the refiner. This is a particularly good utilization of
- a favorable development of the invention is characterized in that the impregnation is carried out at a temperature of 80-170 ° C, preferably 130-140 ° C. In this temperature range, a particularly good and rapid implementation of the chemicals can be achieved.
- a favorable development of the invention is characterized in that the total amount of chemicals added is 1-20 kg / t, preferably 10-15 kg / t. Thus, the specific energy consumption of the process, in particular the comminution in the refiner, can be significantly reduced.
- FIG. A flow diagram of a pretreatment plant with impregnation
- the FIGURE shows an example of a system circuit according to the invention.
- woodchips which may already be pretreated, fed to a reactor 2 for impregnation.
- a chemical This is a mixture of sodium sulfite and sodium bisulfite.
- the chemical supplied here has a pH of about 6.5-7.0 and is about 60-80% of the total amount of chemicals to be added. It has been shown that at a pH of 6.5 - 7.0 already 60 - 80% of the reaction after a short time, often after a few
- the pH can be 6.0
- the remaining amount of about 20-40% of the chemicals which in turn consist of a mixture of sodium sulfite and sodium bisulfite, is fed in via a line 6.
- the chemicals which in turn consist of a mixture of sodium sulfite and sodium bisulfite
- the pH here can be 4.0-5.5. This results in the crushing zone, a pH value, the deposits and coating on the refining plates, in particular of calcium sulfide prevented.
- the invention is not limited to the examples described. It can be used for both hardwood and softwood.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50551/2016A AT518800B1 (en) | 2016-06-17 | 2016-06-17 | METHOD FOR PRODUCING FIBROUS MATERIAL |
PCT/EP2017/061926 WO2017215877A1 (en) | 2016-06-17 | 2017-05-18 | Method for producing a fibrous material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3472383A1 true EP3472383A1 (en) | 2019-04-24 |
EP3472383B1 EP3472383B1 (en) | 2020-03-04 |
Family
ID=58745225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17724804.4A Active EP3472383B1 (en) | 2016-06-17 | 2017-05-18 | Method for producing a fibrous material |
Country Status (6)
Country | Link |
---|---|
US (1) | US11535983B2 (en) |
EP (1) | EP3472383B1 (en) |
AT (1) | AT518800B1 (en) |
CA (1) | CA3028009C (en) |
RU (1) | RU2704362C1 (en) |
WO (1) | WO2017215877A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7697967B2 (en) | 2005-12-28 | 2010-04-13 | Abbott Diabetes Care Inc. | Method and apparatus for providing analyte sensor insertion |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3225028A (en) * | 1962-06-11 | 1965-12-21 | Nordgren Robert | Acrolein adducts of polygalactomannans and polyglucomannans and process of preparing same |
CH423451A (en) * | 1963-04-03 | 1966-10-31 | Defibrator Ab | Process for the production of pulp from lignocellulosic material |
GB1041995A (en) * | 1964-11-24 | 1966-09-07 | Fmc Corp | Production of cellulosic pulp of increased brightness |
CA1051618A (en) * | 1976-05-14 | 1979-04-03 | Prescott E. Gardner | Method of producing high yield chemimechanical pulps |
US4486267A (en) | 1983-11-14 | 1984-12-04 | Mead Corporation | Chemithermomechanical pulping process employing separate alkali and sulfite treatments |
NZ211684A (en) * | 1985-04-04 | 1989-07-27 | Caxton Paper Ltd | Manufacture of cellulose pulp: second digestion step follows initial digestion and refining steps |
KR100750330B1 (en) * | 2005-05-30 | 2007-08-20 | 유해일 | Manufacturing method of mechanical pulp from cornstalk |
PT1907178T (en) | 2005-07-27 | 2016-09-30 | Kronoplus Technical Ag | Method for production of wood material articles with low emissions of chemical compounds |
US8734611B2 (en) | 2008-03-12 | 2014-05-27 | Andritz Inc. | Medium consistency refining method of pulp and system |
DE102009057208A1 (en) | 2009-11-27 | 2011-06-01 | Technische Universität Dresden | Process for the production of lignocellulosic paper pulps and papers, cartons and boards derived therefrom |
EP2348154A1 (en) | 2010-01-22 | 2011-07-27 | Andritz AG | Method for manufacturing wooden material |
-
2016
- 2016-06-17 AT ATA50551/2016A patent/AT518800B1/en active
-
2017
- 2017-05-18 CA CA3028009A patent/CA3028009C/en active Active
- 2017-05-18 RU RU2018147212A patent/RU2704362C1/en active
- 2017-05-18 EP EP17724804.4A patent/EP3472383B1/en active Active
- 2017-05-18 WO PCT/EP2017/061926 patent/WO2017215877A1/en active Search and Examination
- 2017-05-18 US US16/307,823 patent/US11535983B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
AT518800B1 (en) | 2019-09-15 |
AT518800A1 (en) | 2018-01-15 |
CA3028009A1 (en) | 2017-12-21 |
US11535983B2 (en) | 2022-12-27 |
US20190352849A1 (en) | 2019-11-21 |
CA3028009C (en) | 2022-12-13 |
RU2704362C1 (en) | 2019-10-28 |
WO2017215877A1 (en) | 2017-12-21 |
EP3472383B1 (en) | 2020-03-04 |
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