CA1094264A - Delignification de materiel lignocellulosique par une liqueur a la soude contenant un compose cyclique du type ceto- et un compose nitroaromatique - Google Patents

Delignification de materiel lignocellulosique par une liqueur a la soude contenant un compose cyclique du type ceto- et un compose nitroaromatique

Info

Publication number: CA1094264A
Authority: CA; Canada
Prior art keywords: lignocellulosic material; anthraquinone; weight; cyclic keto; compound
Prior art date: 1976-12-14
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

CA291,265A

Other languages

English (en)

Inventor

Harry H. Holton

Gordon H. Segall

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.)

PPG Architectural Coatings Canada Inc

Original Assignee

Canadian Industries 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.)

1976-12-14

Filing date

1977-11-18

Publication date

1981-01-27

1977-11-18 Application filed by Canadian Industries Ltd filed Critical Canadian Industries Ltd

1981-01-27 Application granted granted Critical

1981-01-27 Publication of CA1094264A publication Critical patent/CA1094264A/fr

Status Expired legal-status Critical Current

Links

239000012978 lignocellulosic material Substances 0.000 title claims abstract description 38
-1 cyclic keto compound Chemical class 0.000 title claims abstract description 35
229930194542 Keto Natural products 0.000 title claims abstract description 13
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 title abstract description 23
LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 claims abstract description 26
239000000654 additive Substances 0.000 claims abstract description 20
239000003265 pulping liquor Substances 0.000 claims abstract description 15
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 claims abstract description 13
150000004056 anthraquinones Chemical class 0.000 claims abstract description 13
238000000034 method Methods 0.000 claims description 62
238000011282 treatment Methods 0.000 claims description 24
229910052760 oxygen Inorganic materials 0.000 claims description 23
239000001301 oxygen Substances 0.000 claims description 22
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
239000000463 material Substances 0.000 claims description 14
NJWGQARXZDRHCD-UHFFFAOYSA-N 2-methylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(C)=CC=C3C(=O)C2=C1 NJWGQARXZDRHCD-UHFFFAOYSA-N 0.000 claims description 10
239000002585 base Substances 0.000 claims description 10
229910052783 alkali metal Inorganic materials 0.000 claims description 9
150000001340 alkali metals Chemical class 0.000 claims description 9
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
150000004053 quinones Chemical class 0.000 claims description 8
125000003545 alkoxy group Chemical group 0.000 claims description 7
125000000217 alkyl group Chemical group 0.000 claims description 7
KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 claims description 6
238000004061 bleaching Methods 0.000 claims description 6
IZUKQUVSCNEFMJ-UHFFFAOYSA-N 1,2-dinitrobenzene Chemical class [O-][N+](=O)C1=CC=CC=C1[N+]([O-])=O IZUKQUVSCNEFMJ-UHFFFAOYSA-N 0.000 claims description 5
RJGDLRCDCYRQOQ-UHFFFAOYSA-N anthrone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3CC2=C1 RJGDLRCDCYRQOQ-UHFFFAOYSA-N 0.000 claims description 5
YYVYAPXYZVYDHN-UHFFFAOYSA-N 9,10-phenanthroquinone Chemical compound C1=CC=C2C(=O)C(=O)C3=CC=CC=C3C2=C1 YYVYAPXYZVYDHN-UHFFFAOYSA-N 0.000 claims description 4
229930192627 Naphthoquinone Natural products 0.000 claims description 4
239000003513 alkali Substances 0.000 claims description 4
150000001412 amines Chemical class 0.000 claims description 4
125000004432 carbon atom Chemical group C* 0.000 claims description 4
239000007789 gas Substances 0.000 claims description 4
150000002791 naphthoquinones Chemical class 0.000 claims description 4
SFSLTRCPISPSKB-UHFFFAOYSA-N 10-methylideneanthracen-9-one Chemical compound C1=CC=C2C(=C)C3=CC=CC=C3C(=O)C2=C1 SFSLTRCPISPSKB-UHFFFAOYSA-N 0.000 claims description 3
JQQLIJAFGKWFOY-UHFFFAOYSA-N 2,6-dimethylanthracene-9,10-dione Chemical compound CC1=CC=C2C(=O)C3=CC(C)=CC=C3C(=O)C2=C1 JQQLIJAFGKWFOY-UHFFFAOYSA-N 0.000 claims description 3
RATJDSXPVPAWJJ-UHFFFAOYSA-N 2,7-dimethylanthracene-9,10-dione Chemical compound C1=C(C)C=C2C(=O)C3=CC(C)=CC=C3C(=O)C2=C1 RATJDSXPVPAWJJ-UHFFFAOYSA-N 0.000 claims description 3
XOGPDSATLSAZEK-UHFFFAOYSA-N 2-Aminoanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(N)=CC=C3C(=O)C2=C1 XOGPDSATLSAZEK-UHFFFAOYSA-N 0.000 claims description 3
SJEBAWHUJDUKQK-UHFFFAOYSA-N 2-ethylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC=C3C(=O)C2=C1 SJEBAWHUJDUKQK-UHFFFAOYSA-N 0.000 claims description 3
PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 claims description 3
LHMRXAIRPKSGDE-UHFFFAOYSA-N benzo[a]anthracene-7,12-dione Chemical compound C1=CC2=CC=CC=C2C2=C1C(=O)C1=CC=CC=C1C2=O LHMRXAIRPKSGDE-UHFFFAOYSA-N 0.000 claims description 3
125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
WDCYWAQPCXBPJA-UHFFFAOYSA-N 1,3-dinitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC([N+]([O-])=O)=C1 WDCYWAQPCXBPJA-UHFFFAOYSA-N 0.000 claims description 2
FYFDQJRXFWGIBS-UHFFFAOYSA-N 1,4-dinitrobenzene Chemical compound [O-][N+](=O)C1=CC=C([N+]([O-])=O)C=C1 FYFDQJRXFWGIBS-UHFFFAOYSA-N 0.000 claims description 2
YFZHODLXYNDBSM-UHFFFAOYSA-N 1-ethenyl-4-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(C=C)C=C1 YFZHODLXYNDBSM-UHFFFAOYSA-N 0.000 claims description 2
RMBFBMJGBANMMK-UHFFFAOYSA-N 2,4-dinitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O RMBFBMJGBANMMK-UHFFFAOYSA-N 0.000 claims description 2
DPJCXCZTLWNFOH-UHFFFAOYSA-N 2-nitroaniline Chemical compound NC1=CC=CC=C1[N+]([O-])=O DPJCXCZTLWNFOH-UHFFFAOYSA-N 0.000 claims description 2
ZLCPKMIJYMHZMJ-UHFFFAOYSA-N 2-nitrobenzene-1,3-diol Chemical compound OC1=CC=CC(O)=C1[N+]([O-])=O ZLCPKMIJYMHZMJ-UHFFFAOYSA-N 0.000 claims description 2
PLAZTCDQAHEYBI-UHFFFAOYSA-N 2-nitrotoluene Chemical compound CC1=CC=CC=C1[N+]([O-])=O PLAZTCDQAHEYBI-UHFFFAOYSA-N 0.000 claims description 2
VYWYYJYRVSBHJQ-UHFFFAOYSA-N 3,5-dinitrobenzoic acid Chemical compound OC(=O)C1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1 VYWYYJYRVSBHJQ-UHFFFAOYSA-N 0.000 claims description 2
TYMLOMAKGOJONV-UHFFFAOYSA-N 4-nitroaniline Chemical compound NC1=CC=C([N+]([O-])=O)C=C1 TYMLOMAKGOJONV-UHFFFAOYSA-N 0.000 claims description 2
BXRFQSNOROATLV-UHFFFAOYSA-N 4-nitrobenzaldehyde Chemical compound [O-][N+](=O)C1=CC=C(C=O)C=C1 BXRFQSNOROATLV-UHFFFAOYSA-N 0.000 claims description 2
OTLNPYWUJOZPPA-UHFFFAOYSA-N 4-nitrobenzoic acid Chemical compound OC(=O)C1=CC=C([N+]([O-])=O)C=C1 OTLNPYWUJOZPPA-UHFFFAOYSA-N 0.000 claims description 2
ZPTVNYMJQHSSEA-UHFFFAOYSA-N 4-nitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1 ZPTVNYMJQHSSEA-UHFFFAOYSA-N 0.000 claims description 2
WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 claims description 2
239000012736 aqueous medium Substances 0.000 claims description 2
239000007900 aqueous suspension Substances 0.000 claims description 2
CQGDBBBZCJYDRY-UHFFFAOYSA-N 1-methoxyanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2OC CQGDBBBZCJYDRY-UHFFFAOYSA-N 0.000 claims 2
RBGUKBSLNOTVCD-UHFFFAOYSA-N 1-methylanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2C RBGUKBSLNOTVCD-UHFFFAOYSA-N 0.000 claims 2
ZXVONLUNISGICL-UHFFFAOYSA-N 4,6-dinitro-o-cresol Chemical compound CC1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1O ZXVONLUNISGICL-UHFFFAOYSA-N 0.000 claims 1
239000002023 wood Substances 0.000 abstract description 9
241000609240 Ambelania acida Species 0.000 abstract description 2
239000010905 bagasse Substances 0.000 abstract description 2
239000010902 straw Substances 0.000 abstract description 2
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
238000004537 pulping Methods 0.000 description 22
238000010411 cooking Methods 0.000 description 11
230000000996 additive effect Effects 0.000 description 9
239000002655 kraft paper Substances 0.000 description 9
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 8
230000029087 digestion Effects 0.000 description 7
230000008901 benefit Effects 0.000 description 5
239000004155 Chlorine dioxide Substances 0.000 description 4
RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 4
235000019398 chlorine dioxide Nutrition 0.000 description 4
238000000605 extraction Methods 0.000 description 4
229920005610 lignin Polymers 0.000 description 4
239000000123 paper Substances 0.000 description 4
241000894007 species Species 0.000 description 4
KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
239000005864 Sulphur Substances 0.000 description 3
239000001913 cellulose Substances 0.000 description 3
235000010980 cellulose Nutrition 0.000 description 3
238000006243 chemical reaction Methods 0.000 description 3
239000003153 chemical reaction reagent Substances 0.000 description 3
239000000460 chlorine Substances 0.000 description 3
239000000306 component Substances 0.000 description 3
150000001875 compounds Chemical class 0.000 description 3
238000005259 measurement Methods 0.000 description 3
230000000704 physical effect Effects 0.000 description 3
AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 2
KIJPZYXCIHZVGP-UHFFFAOYSA-N 2,3-dimethylanthracene-9,10-dione Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=C(C)C(C)=C2 KIJPZYXCIHZVGP-UHFFFAOYSA-N 0.000 description 2
235000018185 Betula X alpestris Nutrition 0.000 description 2
235000018212 Betula X uliginosa Nutrition 0.000 description 2
JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
240000009002 Picea mariana Species 0.000 description 2
235000017997 Picea mariana var. mariana Nutrition 0.000 description 2
235000018000 Picea mariana var. semiprostrata Nutrition 0.000 description 2
229920002678 cellulose Polymers 0.000 description 2
238000005660 chlorination reaction Methods 0.000 description 2
230000000694 effects Effects 0.000 description 2
238000010438 heat treatment Methods 0.000 description 2
159000000003 magnesium salts Chemical class 0.000 description 2
238000004519 manufacturing process Methods 0.000 description 2
239000002609 medium Substances 0.000 description 2
150000005181 nitrobenzenes Chemical class 0.000 description 2
BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
238000007670 refining Methods 0.000 description 2
238000011160 research Methods 0.000 description 2
239000011122 softwood Substances 0.000 description 2
LQCKFXAPVKCRRU-UHFFFAOYSA-N 2,4-dinitrobenzene-1,3-diol Chemical compound OC1=CC=C([N+]([O-])=O)C(O)=C1[N+]([O-])=O LQCKFXAPVKCRRU-UHFFFAOYSA-N 0.000 description 1
OOPXZCWOOWWBKX-UHFFFAOYSA-N 2-methyl-4,5-dinitrophenol Chemical compound CC1=CC([N+]([O-])=O)=C([N+]([O-])=O)C=C1O OOPXZCWOOWWBKX-UHFFFAOYSA-N 0.000 description 1
IJJWOSAXNHWBPR-HUBLWGQQSA-N 5-[(3as,4s,6ar)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl]-n-(6-hydrazinyl-6-oxohexyl)pentanamide Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)NCCCCCC(=O)NN)SC[C@@H]21 IJJWOSAXNHWBPR-HUBLWGQQSA-N 0.000 description 1
244000283070 Abies balsamea Species 0.000 description 1
235000007173 Abies balsamea Nutrition 0.000 description 1
235000004710 Abies lasiocarpa Nutrition 0.000 description 1
241000208140 Acer Species 0.000 description 1
BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
240000000731 Fagus sylvatica Species 0.000 description 1
235000010099 Fagus sylvatica Nutrition 0.000 description 1
MMPOTNFPDMJTRR-UHFFFAOYSA-N OOOOOOOOOOO Chemical compound OOOOOOOOOOO MMPOTNFPDMJTRR-UHFFFAOYSA-N 0.000 description 1
241000218657 Picea Species 0.000 description 1
235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
241000018646 Pinus brutia Species 0.000 description 1
235000011613 Pinus brutia Nutrition 0.000 description 1
241000218978 Populus deltoides Species 0.000 description 1
241000183024 Populus tremula Species 0.000 description 1
244000305267 Quercus macrolepis Species 0.000 description 1
208000036366 Sensation of pressure Diseases 0.000 description 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
239000002253 acid Substances 0.000 description 1
238000003915 air pollution Methods 0.000 description 1
229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
150000008041 alkali metal carbonates Chemical class 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
239000003518 caustics Substances 0.000 description 1
229940106135 cellulose Drugs 0.000 description 1
229910052801 chlorine Inorganic materials 0.000 description 1
229940000425 combination drug Drugs 0.000 description 1
230000007812 deficiency Effects 0.000 description 1
238000010790 dilution Methods 0.000 description 1
239000012895 dilution Substances 0.000 description 1
JLJNENVYAVKECZ-HRXVJLLUSA-N eoxin E4 Chemical compound CCCCC[C@H](O)[C@H](SC[C@H](N)C(O)=O)\C=C\C=C\C=C/C\C=C/CCCC(O)=O JLJNENVYAVKECZ-HRXVJLLUSA-N 0.000 description 1
239000013505 freshwater Substances 0.000 description 1
239000011121 hardwood Substances 0.000 description 1
229910001425 magnesium ion Inorganic materials 0.000 description 1
229910052943 magnesium sulfate Inorganic materials 0.000 description 1
235000019341 magnesium sulphate Nutrition 0.000 description 1
239000000203 mixture Substances 0.000 description 1
229910000027 potassium carbonate Inorganic materials 0.000 description 1
238000012545 processing Methods 0.000 description 1
238000011084 recovery Methods 0.000 description 1
150000003839 salts Chemical class 0.000 description 1
229910000029 sodium carbonate Inorganic materials 0.000 description 1
GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
229910001220 stainless steel Inorganic materials 0.000 description 1
239000010935 stainless steel Substances 0.000 description 1
239000000126 substance Substances 0.000 description 1
229910052717 sulfur Inorganic materials 0.000 description 1
229910021653 sulphate ion Inorganic materials 0.000 description 1
238000003786 synthesis reaction Methods 0.000 description 1
238000012546 transfer Methods 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
- D21C3/22—Other features of pulping processes
- D21C3/222—Use of compounds accelerating the pulping processes

Landscapes

Paper (AREA)
Polysaccharides And Polysaccharide Derivatives (AREA)
Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Food Preservation Except Freezing, Refrigeration, And Drying (AREA)

CA291,265A 1976-12-14 1977-11-18 Delignification de materiel lignocellulosique par une liqueur a la soude contenant un compose cyclique du type ceto- et un compose nitroaromatique Expired CA1094264A (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US75044176A	1976-12-14	1976-12-14
US750,441		1985-07-01

Publications (1)

Publication Number	Publication Date
CA1094264A true CA1094264A (fr)	1981-01-27

Family

ID=25017887

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA291,265A Expired CA1094264A (fr)	1976-12-14	1977-11-18	Delignification de materiel lignocellulosique par une liqueur a la soude contenant un compose cyclique du type ceto- et un compose nitroaromatique

Country Status (12)

Country	Link
JP (1)	JPS5374102A (fr)
AU (1)	AU504177B2 (fr)
BR (1)	BR7708249A (fr)
CA (1)	CA1094264A (fr)
DE (1)	DE2755769A1 (fr)
ES (1)	ES465038A1 (fr)
FI (1)	FI773771A7 (fr)
FR (1)	FR2374464A1 (fr)
NO (1)	NO774265L (fr)
NZ (1)	NZ185812A (fr)
SE (1)	SE7714129L (fr)
ZA (1)	ZA777226B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2925544A1 (de) *	1979-06-25	1981-01-22	Bayer Ag	Verfahren zur delignifizierung von lignocellulose-materialien
DE2941385A1 (de) *	1979-10-12	1981-04-23	Bayer Ag, 5090 Leverkusen	Dispersionen von nitroanthrachinonen, verfahren zu deren herstellung und ihre verwendung
WO1999063149A1 (fr) *	1998-06-02	1999-12-09	The United States Of America, Represented By The Secretary Of Agriculture	Procede de delignification de substances ligno-cellulosiques

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DD98549A1 (fr) *	1970-07-23	1973-06-20
JPS51112903A (en) *	1975-03-26	1976-10-05	Honshu Paper Co Ltd	Process for digesting lignocellulose material with sulphites
JPS5143403A (en) *	1974-10-09	1976-04-14	Honshu Paper Co Ltd	Arukariparupuno seizohoho
FI51833C (fr) *	1975-03-18	1978-01-24	Ahlstroem Oy

1977
- 1977-11-18 CA CA291,265A patent/CA1094264A/fr not_active Expired
- 1977-11-23 AU AU30875/77A patent/AU504177B2/en not_active Expired
- 1977-11-29 NZ NZ185812A patent/NZ185812A/xx unknown
- 1977-12-05 ZA ZA00777226A patent/ZA777226B/xx unknown
- 1977-12-09 JP JP14733177A patent/JPS5374102A/ja active Granted
- 1977-12-12 BR BR7708249A patent/BR7708249A/pt unknown
- 1977-12-12 NO NO774265A patent/NO774265L/no unknown
- 1977-12-13 FI FI773771A patent/FI773771A7/fi not_active Application Discontinuation
- 1977-12-13 SE SE7714129A patent/SE7714129L/xx unknown
- 1977-12-14 FR FR7737644A patent/FR2374464A1/fr active Granted
- 1977-12-14 DE DE19772755769 patent/DE2755769A1/de not_active Withdrawn
- 1977-12-14 ES ES465038A patent/ES465038A1/es not_active Expired

Also Published As

Publication number	Publication date
JPS5345402B2 (fr)	1978-12-06
NZ185812A (en)	1980-10-08
JPS5374102A (en)	1978-07-01
FR2374464B1 (fr)	1981-02-27
NO774265L (no)	1978-06-15
AU3087577A (en)	1979-07-05
SE7714129L (sv)	1978-06-15
BR7708249A (pt)	1978-09-05
DE2755769A1 (de)	1978-06-15
FI773771A7 (fi)	1978-06-15
ZA777226B (en)	1978-09-27
ES465038A1 (es)	1978-12-01
AU504177B2 (en)	1979-10-04
FR2374464A1 (fr)	1978-07-13

Legal Events

Date	Code	Title	Description
1998-01-27	MKEX	Expiry

Publication	Publication Date	Title
CA1073161A (fr)	1980-03-11	Procede de delignification
US3888727A (en)	1975-06-10	Treatment of lignocellulosic material in an alkaline pulping liquor containing anthraquinone sulphonic acid followed by oxygen delignification
US3944463A (en)	1976-03-16	Pulping of lignocellulosic material with oxygen in two stages at increasing pH
US3691008A (en)	1972-09-12	Two-stage soda-oxygen pulping
US4091749A (en)	1978-05-30	Alkaline pulping of lignocellulosic material with amine pretreatment
CA1110412A (fr)	1981-10-13	Obtention de pates a l'aide d'une solution alcaline renfermant une cetone cyclique et une amine
US3707437A (en)	1972-12-26	Pulping and bleaching of wood chips in a single stage with tertiary butyl hydroperoxide
US3919041A (en)	1975-11-11	Multi-stage chlorine dioxide delignification of wood pulp
CA1096112A (fr)	1981-02-24	Delignification de materiel lignocellulosique par une liqueur alcaline, en presence d'un produit d'addition du type diels-alder de benzoquinone ou de naphtoquinone
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