CA1087892A - Methode de defibrage par l'emploi d'alcalis - Google Patents

Methode de defibrage par l'emploi d'alcalis

Info

Publication number: CA1087892A
Authority: CA; Canada
Prior art keywords: pulping; pulp; liquor; colour; cooking
Prior art date: 1977-05-02
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

Application number

CA302,133A

Other languages

English (en)

Inventor

Peter F. Nelson

Vernon T. Henderson

Alan Farrington

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Amcor Pty Ltd

Original Assignee

Australian Paper Manufacturers Ltd

Priority date (The priority date 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 date listed.)

1977-05-02

Filing date

1978-04-27

Publication date

1980-10-21

1978-04-27 Application filed by Australian Paper Manufacturers Ltd filed Critical Australian Paper Manufacturers Ltd

1980-10-21 Application granted granted Critical

1980-10-21 Publication of CA1087892A publication Critical patent/CA1087892A/fr

Status Expired legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 51
230000008569 process Effects 0.000 title claims abstract description 51
238000004537 pulping Methods 0.000 title abstract description 29
150000001875 compounds Chemical class 0.000 claims abstract description 25
239000003265 pulping liquor Substances 0.000 claims abstract description 14
239000012978 lignocellulosic material Substances 0.000 claims abstract description 11
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 29
CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 18
ZVALGBPJYGUWIS-UHFFFAOYSA-N 1,4-dihydroanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1CC=CC2 ZVALGBPJYGUWIS-UHFFFAOYSA-N 0.000 claims description 6
QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
239000000654 additive Substances 0.000 claims description 6
XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 6
-1 naphthahydroquinones Chemical class 0.000 claims description 6
239000011734 sodium Substances 0.000 claims description 6
229910052708 sodium Inorganic materials 0.000 claims description 6
BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 5
230000029087 digestion Effects 0.000 claims description 5
229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
230000000996 additive effect Effects 0.000 claims description 4
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
229910021529 ammonia Inorganic materials 0.000 claims description 3
239000011575 calcium Substances 0.000 claims description 3
229910052791 calcium Inorganic materials 0.000 claims description 3
239000011777 magnesium Substances 0.000 claims description 3
229910052749 magnesium Inorganic materials 0.000 claims description 3
239000011591 potassium Substances 0.000 claims description 3
229910052700 potassium Inorganic materials 0.000 claims description 3
XPCZSIPRUSOJFO-UHFFFAOYSA-N 1,4,4a,9a-tetrahydroanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2C1CC=CC2 XPCZSIPRUSOJFO-UHFFFAOYSA-N 0.000 claims description 2
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
150000004054 benzoquinones Chemical class 0.000 claims description 2
150000002791 naphthoquinones Chemical class 0.000 claims description 2
RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical group C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 claims 1
239000011593 sulfur Substances 0.000 claims 1
229910052717 sulfur Inorganic materials 0.000 claims 1
239000003513 alkali Substances 0.000 abstract description 21
238000010411 cooking Methods 0.000 description 31
239000002994 raw material Substances 0.000 description 12
239000002023 wood Substances 0.000 description 12
150000004056 anthraquinones Chemical class 0.000 description 10
239000000126 substance Substances 0.000 description 10
238000007792 addition Methods 0.000 description 9
PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 9
230000004087 circulation Effects 0.000 description 8
238000011084 recovery Methods 0.000 description 8
238000004519 manufacturing process Methods 0.000 description 7
PCFMUWBCZZUMRX-UHFFFAOYSA-N 9,10-Dihydroxyanthracene Chemical compound C1=CC=C2C(O)=C(C=CC=C3)C3=C(O)C2=C1 PCFMUWBCZZUMRX-UHFFFAOYSA-N 0.000 description 6
239000003638 chemical reducing agent Substances 0.000 description 6
239000002655 kraft paper Substances 0.000 description 6
239000000123 paper Substances 0.000 description 6
230000008901 benefit Effects 0.000 description 5
AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 5
238000005470 impregnation Methods 0.000 description 4
239000000243 solution Substances 0.000 description 4
QIGBRXMKCJKVMJ-UHFFFAOYSA-N 1,4-Benzenediol Natural products OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 3
230000009286 beneficial effect Effects 0.000 description 3
230000000694 effects Effects 0.000 description 3
239000000203 mixture Substances 0.000 description 3
238000002203 pretreatment Methods 0.000 description 3
LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 3
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
KOGHAOQITVWULR-UHFFFAOYSA-N 10-hydroxy-10h-anthracen-9-one Chemical compound C1=CC=C2C(O)C3=CC=CC=C3C(=O)C2=C1 KOGHAOQITVWULR-UHFFFAOYSA-N 0.000 description 2
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 description 2
WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
235000011613 Pinus brutia Nutrition 0.000 description 2
241000018646 Pinus brutia Species 0.000 description 2
UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
229920002472 Starch Polymers 0.000 description 2
239000012670 alkaline solution Substances 0.000 description 2
238000009835 boiling Methods 0.000 description 2
238000006243 chemical reaction Methods 0.000 description 2
238000002485 combustion reaction Methods 0.000 description 2
230000000875 corresponding effect Effects 0.000 description 2
230000007613 environmental effect Effects 0.000 description 2
239000008103 glucose Substances 0.000 description 2
239000000463 material Substances 0.000 description 2
PCILLCXFKWDRMK-UHFFFAOYSA-N naphthalene-1,4-diol Chemical class C1=CC=C2C(O)=CC=C(O)C2=C1 PCILLCXFKWDRMK-UHFFFAOYSA-N 0.000 description 2
150000004053 quinones Chemical class 0.000 description 2
238000004064 recycling Methods 0.000 description 2
GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
241000894007 species Species 0.000 description 2
235000019698 starch Nutrition 0.000 description 2
239000004094 surface-active agent Substances 0.000 description 2
238000011282 treatment Methods 0.000 description 2
OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 description 1
241001263092 Alchornea latifolia Species 0.000 description 1
241000609240 Ambelania acida Species 0.000 description 1
241000370685 Arge Species 0.000 description 1
GUBGYTABKSRVRQ-CUHNMECISA-N D-Cellobiose 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)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-CUHNMECISA-N 0.000 description 1
WQZGKKKJIJFFOK-QTVWNMPRSA-N D-mannopyranose Chemical compound OC[C@H]1OC(O)[C@@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-QTVWNMPRSA-N 0.000 description 1
229920001353 Dextrin Polymers 0.000 description 1
239000004375 Dextrin Substances 0.000 description 1
229920002085 Dialdehyde starch Polymers 0.000 description 1
RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
241000283160 Inia Species 0.000 description 1
GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 description 1
MJVAVZPDRWSRRC-UHFFFAOYSA-N Menadione Chemical compound C1=CC=C2C(=O)C(C)=CC(=O)C2=C1 MJVAVZPDRWSRRC-UHFFFAOYSA-N 0.000 description 1
229930192627 Naphthoquinone Natural products 0.000 description 1
241001163743 Perlodes Species 0.000 description 1
229920001131 Pulp (paper) Polymers 0.000 description 1
CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
229930006000 Sucrose Natural products 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
150000001299 aldehydes Chemical class 0.000 description 1
150000001412 amines Chemical class 0.000 description 1
AVKUERGKIZMTKX-NJBDSQKTSA-N ampicillin Chemical compound C1([C@@H](N)C(=O)N[C@H]2[C@H]3SC([C@@H](N3C2=O)C(O)=O)(C)C)=CC=CC=C1 AVKUERGKIZMTKX-NJBDSQKTSA-N 0.000 description 1
PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 description 1
239000010905 bagasse Substances 0.000 description 1
238000010009 beating Methods 0.000 description 1
SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 description 1
WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 description 1
229940077731 carbohydrate nutrients Drugs 0.000 description 1
150000001720 carbohydrates Chemical class 0.000 description 1
235000014633 carbohydrates Nutrition 0.000 description 1
239000003518 caustics Substances 0.000 description 1
230000002301 combined effect Effects 0.000 description 1
230000001276 controlling effect Effects 0.000 description 1
230000006378 damage Effects 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
235000019425 dextrin Nutrition 0.000 description 1
238000009792 diffusion process Methods 0.000 description 1
230000003292 diminished effect Effects 0.000 description 1
150000002016 disaccharides Chemical class 0.000 description 1
239000002270 dispersing agent Substances 0.000 description 1
GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical compound OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 description 1
230000000497 effect on colour Effects 0.000 description 1
150000002169 ethanolamines Chemical class 0.000 description 1
238000011156 evaluation Methods 0.000 description 1
238000004880 explosion Methods 0.000 description 1
239000002360 explosive Substances 0.000 description 1
230000002349 favourable effect Effects 0.000 description 1
239000012634 fragment Substances 0.000 description 1
150000004676 glycans Polymers 0.000 description 1
239000011121 hardwood Substances 0.000 description 1
125000000687 hydroquinonyl group Chemical group C1(O)=C(C=C(O)C=C1)* 0.000 description 1
238000011065 in-situ storage Methods 0.000 description 1
238000002347 injection Methods 0.000 description 1
239000007924 injection Substances 0.000 description 1
150000002772 monosaccharides Chemical class 0.000 description 1
230000007935 neutral effect Effects 0.000 description 1
229910052757 nitrogen Inorganic materials 0.000 description 1
229920001542 oligosaccharide Polymers 0.000 description 1
150000002482 oligosaccharides Chemical class 0.000 description 1
150000002894 organic compounds Chemical class 0.000 description 1
239000011087 paperboard Substances 0.000 description 1
239000002245 particle Substances 0.000 description 1
230000035515 penetration Effects 0.000 description 1
239000005017 polysaccharide Substances 0.000 description 1
150000004804 polysaccharides Polymers 0.000 description 1
230000035484 reaction time Effects 0.000 description 1
238000002791 soaking Methods 0.000 description 1
229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
235000017557 sodium bicarbonate Nutrition 0.000 description 1
239000012279 sodium borohydride Substances 0.000 description 1
229910000033 sodium borohydride Inorganic materials 0.000 description 1
JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 1
235000010265 sodium sulphite Nutrition 0.000 description 1
239000008107 starch Substances 0.000 description 1
239000010902 straw Substances 0.000 description 1
239000005720 sucrose Substances 0.000 description 1
239000000725 suspension Substances 0.000 description 1
MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 description 1
FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 description 1
235000012141 vanillin Nutrition 0.000 description 1
229920001221 xylan Polymers 0.000 description 1
150000004823 xylans Chemical class 0.000 description 1
PENRVBJTRIYHOA-UHFFFAOYSA-L zinc dithionite Chemical compound [Zn+2].[O-]S(=O)S([O-])=O PENRVBJTRIYHOA-UHFFFAOYSA-L 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes

Landscapes

Chemical & Material Sciences (AREA)
Inorganic Chemistry (AREA)
Paper (AREA)

CA302,133A 1977-05-02 1978-04-27 Methode de defibrage par l'emploi d'alcalis Expired CA1087892A (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
AUPC993977		1977-05-02
AU9939/77		1977-05-02

Publications (1)

Publication Number	Publication Date
CA1087892A true CA1087892A (fr)	1980-10-21

Family

ID=3766959

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA302,133A Expired CA1087892A (fr)	1977-05-02	1978-04-27	Methode de defibrage par l'emploi d'alcalis

Country Status (6)

Country	Link
JP (1)	JPS53139803A (fr)
CA (1)	CA1087892A (fr)
FI (1)	FI70439C (fr)
NZ (1)	NZ187090A (fr)
SE (1)	SE439332B (fr)
ZA (1)	ZA782384B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS54100332A (en) *	1978-01-20	1979-08-08	Nippon Steel Chem Co Ltd	Quinone compound composition and its preparation
CA2356444C (fr) *	1999-02-15	2009-12-15	Kiram Ab	Procede de cuisson a l'oxygene de materiau lignocellulosique et de recuperation d'agents chimiques de cuisson
JP5207191B2 (ja) *	2006-05-19	2013-06-12	ザリサーチファンデーションオブステートユニヴァーシティオブニューヨーク	セルロース系材料の炭酸塩前処理およびパルプ化の方法

1978
- 1978-04-26 ZA ZA00782384A patent/ZA782384B/xx unknown
- 1978-04-27 NZ NZ187090A patent/NZ187090A/xx unknown
- 1978-04-27 CA CA302,133A patent/CA1087892A/fr not_active Expired
- 1978-04-28 SE SE7804963A patent/SE439332B/sv not_active IP Right Cessation
- 1978-05-02 FI FI781352A patent/FI70439C/fi not_active IP Right Cessation
- 1978-05-02 JP JP5240378A patent/JPS53139803A/ja active Pending

Also Published As

Publication number	Publication date
ZA782384B (en)	1979-02-28
JPS53139803A (en)	1978-12-06
SE439332B (sv)	1985-06-10
FI70439B (fi)	1986-03-27
FI781352A7 (fi)	1978-11-03
NZ187090A (en)	1980-03-05
FI70439C (fi)	1986-09-19
SE7804963L (sv)	1978-11-03

Legal Events

Date	Code	Title	Description
1997-10-21	MKEX	Expiry

Publication	Publication Date	Title
CA1104762A (fr)	1981-07-14	Methode d'obtention de la pate a papier
US4594130A (en)	1986-06-10	Pulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst
US5041192A (en)	1991-08-20	Supercritical delignification of wood
US4076579A (en)	1978-02-28	Pulping of lignocellulosic material by sequential treatment thereof with nitric oxide and oxygen
US3944463A (en)	1976-03-16	Pulping of lignocellulosic material with oxygen in two stages at increasing pH
US4178861A (en)	1979-12-18	Method for the delignification of lignocellulosic material in an amine delignifying liquor containing a quinone or hydroquinone compound
US5470433A (en)	1995-11-28	Process for the delignification of cellulose fiber raw materials using alcohol and alkali
US4597830A (en)	1986-07-01	Method and pulping composition for the selective delignification of lignocellulosic materials with an aqueous amine-alcohol mixture in the presence of a catalyst
US4091749A (en)	1978-05-30	Alkaline pulping of lignocellulosic material with amine pretreatment
Kirçi et al.	1994	A new modified pulping process alternative to sulphate method “Alkali-Sulfite-Antraquinone-Ethanol (ASAE)”
US3664919A (en)	1972-05-23	Vapor phase polysulphide liquid pulping of lignocellulosic materials
CA1087892A (fr)	1980-10-21	Methode de defibrage par l'emploi d'alcalis
US4248663A (en)	1981-02-03	Pulping with an alkaline liquor containing a cyclic keto compound and an amino compound
US3707437A (en)	1972-12-26	Pulping and bleaching of wood chips in a single stage with tertiary butyl hydroperoxide
US5183535A (en)	1993-02-02	Process for preparing kraft pulp using black liquor pretreatment reaction
US4045280A (en)	1977-08-30	Alkaline pulping of lignocellulosic material with amine and nitrate pretreatment
AU639304B2 (en)	1993-07-22	Process for preparing kraft pulp
Gülsoy et al.	2022	Comparison of Soda, Kraft, and DES Pulp Properties of European Black Poplar.
EP0041401B1 (fr)	1983-11-09	Méthode et mixture pour la production de pâtes cellulosiques
US3981765A (en)	1976-09-21	Treatment of wood chips with an alkali metal borohydride solution followed by mechanical defibration
US3795574A (en)	1974-03-05	Impregnation of wood with a formaldehyde free alkaline solution of sodium hydroxide at a ph between 12.4 and 13
US2772968A (en)	1956-12-04	Process of pulping cellulosic materials with triethylene glycol
EP0262988A2 (fr)	1988-04-06	Fabrication d'une pâte
CA1094264A (fr)	1981-01-27	Delignification de materiel lignocellulosique par une liqueur a la soude contenant un compose cyclique du type ceto- et un compose nitroaromatique
US3663358A (en)	1972-05-16	A METHOD FOR INCREASING BISULFITE PULP YIELD COMPRISING TREATING LIGNOCELLULOSIC MATERIAL WITH CYANIDE IONS AT A pH OF 7{14 12 PRIOR TO DIGESTION