CA1076306A - Procede permettant de reduire la quantite de produits chimiques consommes sans augmentation consequente des emissions lors du pulpage de materiel cellulosique par une liqueur de sulfate basique contenant du soufre et du sodium - Google Patents

Procede permettant de reduire la quantite de produits chimiques consommes sans augmentation consequente des emissions lors du pulpage de materiel cellulosique par une liqueur de sulfate basique contenant du soufre et du sodium

Info

Publication number: CA1076306A
Authority: CA; Canada
Prior art keywords: liquor; sulfur; pulping; sodium; white
Prior art date: 1975-06-17
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

CA255,107A

Other languages

English (en)

Inventor

Lars T. Uhlin

Sture E. O. Noreus

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.)

Mo och Domsjo AB

Original Assignee

Mo och Domsjo AB

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.)

1975-06-17

Filing date

1976-06-17

Publication date

1980-04-29

1976-06-17 Application filed by Mo och Domsjo AB filed Critical Mo och Domsjo AB

1980-04-29 Application granted granted Critical

1980-04-29 Publication of CA1076306A publication Critical patent/CA1076306A/fr

Status Expired legal-status Critical Current

Links

239000000126 substance Substances 0.000 title claims abstract description 61
238000000034 method Methods 0.000 title claims abstract description 58
238000004537 pulping Methods 0.000 title claims abstract description 57
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 25
239000003265 pulping liquor Substances 0.000 title claims abstract description 14
239000000463 material Substances 0.000 title claims abstract description 7
239000001913 cellulose Substances 0.000 title claims description 5
229920002678 cellulose Polymers 0.000 title claims description 5
BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 title claims description 3
RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 106
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 100
239000011593 sulfur Substances 0.000 claims abstract description 84
229910052717 sulfur Inorganic materials 0.000 claims abstract description 84
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims abstract description 62
239000002253 acid Substances 0.000 claims abstract description 41
239000004155 Chlorine dioxide Substances 0.000 claims abstract description 30
235000019398 chlorine dioxide Nutrition 0.000 claims abstract description 30
238000004519 manufacturing process Methods 0.000 claims abstract description 16
229910001868 water Inorganic materials 0.000 claims abstract description 13
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
229910052783 alkali metal Inorganic materials 0.000 claims abstract description 8
238000001704 evaporation Methods 0.000 claims abstract description 7
AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims abstract description 7
235000019345 sodium thiosulphate Nutrition 0.000 claims abstract description 7
241001062472 Stokellia anisodon Species 0.000 claims abstract description 6
MMKVEBPNIHXDCN-UHFFFAOYSA-N [S-2].[Na+].C(O)(O)=O.[Na+] Chemical compound [S-2].[Na+].C(O)(O)=O.[Na+] MMKVEBPNIHXDCN-UHFFFAOYSA-N 0.000 claims abstract description 5
230000001590 oxidative effect Effects 0.000 claims abstract description 5
230000003134 recirculating effect Effects 0.000 claims abstract description 4
230000001172 regenerating effect Effects 0.000 claims abstract description 3
238000004061 bleaching Methods 0.000 claims description 28
239000007788 liquid Substances 0.000 claims description 24
238000011084 recovery Methods 0.000 claims description 19
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 15
229920001021 polysulfide Polymers 0.000 claims description 9
239000005077 polysulfide Substances 0.000 claims description 9
150000008117 polysulfides Polymers 0.000 claims description 9
XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Inorganic materials [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims description 8
-1 sodium sulfide-sodium hydroxide Chemical compound 0.000 claims description 8
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
229910001514 alkali metal chloride Inorganic materials 0.000 claims description 4
238000000605 extraction Methods 0.000 claims description 4
229910000041 hydrogen chloride Inorganic materials 0.000 claims description 4
IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 4
DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 claims description 4
238000005201 scrubbing Methods 0.000 claims description 3
239000003795 chemical substances by application Substances 0.000 claims description 2
238000000746 purification Methods 0.000 claims description 2
239000000567 combustion gas Substances 0.000 claims 1
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 abstract description 30
239000011734 sodium Substances 0.000 abstract description 30
229910052708 sodium Inorganic materials 0.000 abstract description 30
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 24
GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract description 10
229910052979 sodium sulfide Inorganic materials 0.000 abstract description 8
150000001340 alkali metals Chemical class 0.000 abstract description 2
235000001508 sulfur Nutrition 0.000 description 79
229960005349 sulfur Drugs 0.000 description 79
235000010269 sulphur dioxide Nutrition 0.000 description 35
239000007789 gas Substances 0.000 description 31
239000002699 waste material Substances 0.000 description 23
238000006243 chemical reaction Methods 0.000 description 22
FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 20
239000000243 solution Substances 0.000 description 20
239000012298 atmosphere Substances 0.000 description 18
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 11
UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 11
BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 10
239000000460 chlorine Substances 0.000 description 10
229910052801 chlorine Inorganic materials 0.000 description 10
230000003647 oxidation Effects 0.000 description 10
238000007254 oxidation reaction Methods 0.000 description 10
229940080281 sodium chlorate Drugs 0.000 description 10
239000011780 sodium chloride Substances 0.000 description 10
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 9
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
238000012360 testing method Methods 0.000 description 8
239000003513 alkali Substances 0.000 description 7
239000003638 chemical reducing agent Substances 0.000 description 7
239000003546 flue gas Substances 0.000 description 7
UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 6
OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
229910000037 hydrogen sulfide Inorganic materials 0.000 description 6
238000002360 preparation method Methods 0.000 description 6
229940032330 sulfuric acid Drugs 0.000 description 6
MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 5
241000196324 Embryophyta Species 0.000 description 5
PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
229910001882 dioxygen Inorganic materials 0.000 description 5
229910052938 sodium sulfate Inorganic materials 0.000 description 5
235000011152 sodium sulphate Nutrition 0.000 description 5
230000002378 acidificating effect Effects 0.000 description 4
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
239000003054 catalyst Substances 0.000 description 4
238000011109 contamination Methods 0.000 description 4
230000003247 decreasing effect Effects 0.000 description 4
230000007812 deficiency Effects 0.000 description 4
229910052742 iron Inorganic materials 0.000 description 4
239000001301 oxygen Substances 0.000 description 4
229910052760 oxygen Inorganic materials 0.000 description 4
238000012216 screening Methods 0.000 description 4
238000007086 side reaction Methods 0.000 description 4
238000005406 washing Methods 0.000 description 4
238000009993 causticizing Methods 0.000 description 3
PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
150000003839 salts Chemical class 0.000 description 3
229910000029 sodium carbonate Inorganic materials 0.000 description 3
229940079101 sodium sulfide Drugs 0.000 description 3
239000007787 solid Substances 0.000 description 3
239000002023 wood Substances 0.000 description 3
239000004133 Sodium thiosulphate Substances 0.000 description 2
229910000831 Steel Inorganic materials 0.000 description 2
150000001805 chlorine compounds Chemical class 0.000 description 2
238000002485 combustion reaction Methods 0.000 description 2
230000000694 effects Effects 0.000 description 2
239000001257 hydrogen Substances 0.000 description 2
150000002431 hydrogen Chemical class 0.000 description 2
229910052739 hydrogen Inorganic materials 0.000 description 2
WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
231100000614 poison Toxicity 0.000 description 2
230000007096 poisonous effect Effects 0.000 description 2
238000001556 precipitation Methods 0.000 description 2
239000000047 product Substances 0.000 description 2
230000035484 reaction time Effects 0.000 description 2
238000004064 recycling Methods 0.000 description 2
230000000717 retained effect Effects 0.000 description 2
238000000926 separation method Methods 0.000 description 2
239000007858 starting material Substances 0.000 description 2
239000010959 steel Substances 0.000 description 2
241000905957 Channa melasoma Species 0.000 description 1
241000543381 Cliftonia monophylla Species 0.000 description 1
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
239000007832 Na2SO4 Substances 0.000 description 1
VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
150000007513 acids Chemical class 0.000 description 1
230000003466 anti-cipated effect Effects 0.000 description 1
239000007864 aqueous solution Substances 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
239000007844 bleaching agent Substances 0.000 description 1
239000006227 byproduct Substances 0.000 description 1
229940043430 calcium compound Drugs 0.000 description 1
150000001674 calcium compounds Chemical class 0.000 description 1
AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
239000000920 calcium hydroxide Substances 0.000 description 1
229910001861 calcium hydroxide Inorganic materials 0.000 description 1
239000007795 chemical reaction product Substances 0.000 description 1
150000001804 chlorine Chemical class 0.000 description 1
229910017052 cobalt Inorganic materials 0.000 description 1
239000010941 cobalt Substances 0.000 description 1
GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
238000010411 cooking Methods 0.000 description 1
230000002939 deleterious effect Effects 0.000 description 1
238000011161 development Methods 0.000 description 1
230000018109 developmental process Effects 0.000 description 1
238000004090 dissolution Methods 0.000 description 1
238000005868 electrolysis reaction Methods 0.000 description 1
239000012717 electrostatic precipitator Substances 0.000 description 1
230000008020 evaporation Effects 0.000 description 1
230000002349 favourable effect Effects 0.000 description 1
238000001914 filtration Methods 0.000 description 1
ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
239000011521 glass Substances 0.000 description 1
GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
238000007654 immersion Methods 0.000 description 1
239000012535 impurity Substances 0.000 description 1
238000011065 in-situ storage Methods 0.000 description 1
150000002500 ions Chemical class 0.000 description 1
238000009533 lab test Methods 0.000 description 1
238000002386 leaching Methods 0.000 description 1
239000007791 liquid phase Substances 0.000 description 1
239000011777 magnesium Substances 0.000 description 1
229910052749 magnesium Inorganic materials 0.000 description 1
230000003340 mental effect Effects 0.000 description 1
150000007522 mineralic acids Chemical class 0.000 description 1
238000002156 mixing Methods 0.000 description 1
239000000203 mixture Substances 0.000 description 1
229910052759 nickel Inorganic materials 0.000 description 1
150000002816 nickel compounds Chemical class 0.000 description 1
229910001453 nickel ion Inorganic materials 0.000 description 1
239000002245 particle Substances 0.000 description 1
229910001917 perchloryl Inorganic materials 0.000 description 1
229920000867 polyelectrolyte Polymers 0.000 description 1
VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
238000012545 processing Methods 0.000 description 1
230000036647 reaction Effects 0.000 description 1
239000012429 reaction media Substances 0.000 description 1
230000008929 regeneration Effects 0.000 description 1
238000011069 regeneration method Methods 0.000 description 1
150000004760 silicates Chemical class 0.000 description 1
APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical compound [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 description 1
159000000000 sodium salts Chemical class 0.000 description 1
RBWSWDPRDBEWCR-RKJRWTFHSA-N sodium;(2r)-2-[(2r)-3,4-dihydroxy-5-oxo-2h-furan-2-yl]-2-hydroxyethanolate Chemical compound [Na+].[O-]C[C@@H](O)[C@H]1OC(=O)C(O)=C1O RBWSWDPRDBEWCR-RKJRWTFHSA-N 0.000 description 1
239000007921 spray Substances 0.000 description 1
150000003463 sulfur Chemical class 0.000 description 1
229910021653 sulphate ion Inorganic materials 0.000 description 1
239000004291 sulphur dioxide Substances 0.000 description 1
230000001502 supplementing effect Effects 0.000 description 1
238000011144 upstream manufacturing Methods 0.000 description 1
229910052725 zinc Inorganic materials 0.000 description 1
239000011701 zinc Substances 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye

Landscapes

Paper (AREA)
Treating Waste Gases (AREA)

CA255,107A 1975-06-17 1976-06-17 Procede permettant de reduire la quantite de produits chimiques consommes sans augmentation consequente des emissions lors du pulpage de materiel cellulosique par une liqueur de sulfate basique contenant du soufre et du sodium Expired CA1076306A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
SE7506965A SE391357B (sv)	1975-06-17	1975-06-17	Forfarande for minskning av behovet av ferska kemikalier vid uppslutning av cellulosahaltigt material med natrium- och svavelhaltiga losningar

Publications (1)

Publication Number	Publication Date
CA1076306A true CA1076306A (fr)	1980-04-29

Family

ID=20324897

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA255,107A Expired CA1076306A (fr)	1975-06-17	1976-06-17	Procede permettant de reduire la quantite de produits chimiques consommes sans augmentation consequente des emissions lors du pulpage de materiel cellulosique par une liqueur de sulfate basique contenant du soufre et du sodium

Country Status (8)

Country	Link
JP (1)	JPS5215602A (fr)
BR (1)	BR7603905A (fr)
CA (1)	CA1076306A (fr)
FI (1)	FI57796C (fr)
FR (1)	FR2314965A1 (fr)
NO (1)	NO762084L (fr)
NZ (1)	NZ181025A (fr)
SE (1)	SE391357B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
SE411772B (sv) *	1978-04-07	1980-02-04	Sca Development Ab	Sett for minskning av utsleppen till recipient och atmosfer vid uppslutning av cellulosahaltigt material
JPS5611990A (en) *	1979-07-03	1981-02-05	Tomoyasu Noritake	Combustion improver for fuel in internal combustion engine
CA1224628A (fr) *	1982-12-09	1987-07-28	Union Carbide Corporation	Carburants diesel
JPS59202293A (ja) *	1983-04-28	1984-11-16	Nippon Synthetic Chem Ind Co Ltd:The	燃料組成物の製造方法
JPS6330593A (ja) *	1986-07-24	1988-02-09	Kotobuki Senpaku Shoji:Kk	燃油改質方法
JP4230612B2 (ja) *	1999-05-28	2009-02-25	日本製紙株式会社	クラフト法パルプ製造プロセスにおける薬品回収方法
FI130066B (en)	2019-02-13	2023-01-31	Andritz Oy	A method for replacing sodium losses in a pulp mill and a method for producing bleached cellulose pulp

1975
- 1975-06-17 SE SE7506965A patent/SE391357B/xx not_active IP Right Cessation
1976
- 1976-05-28 FI FI761523A patent/FI57796C/fi not_active IP Right Cessation
- 1976-05-28 JP JP51062872A patent/JPS5215602A/ja active Granted
- 1976-06-01 NZ NZ181025A patent/NZ181025A/xx unknown
- 1976-06-11 FR FR7617861A patent/FR2314965A1/fr active Granted
- 1976-06-16 BR BR7603905A patent/BR7603905A/pt unknown
- 1976-06-16 NO NO762084A patent/NO762084L/no unknown
- 1976-06-17 CA CA255,107A patent/CA1076306A/fr not_active Expired

Also Published As

Publication number	Publication date
JPS5215602A (en)	1977-02-05
FI57796B (fi)	1980-06-30
SE391357B (sv)	1977-02-14
SE7506965L (sv)	1976-12-18
BR7603905A (pt)	1977-04-05
FR2314965B1 (fr)	1980-10-17
FI761523A7 (fr)	1976-12-18
JPS5325042B2 (fr)	1978-07-25
FI57796C (fi)	1980-10-10
FR2314965A1 (fr)	1977-01-14
NO762084L (fr)	1976-12-20
NZ181025A (en)	1978-04-28

Legal Events

Date	Code	Title	Description
1997-04-29	MKEX	Expiry

Publication	Publication Date	Title
US4098639A (en)	1978-07-04	Process for reducing the requirement of fresh chemicals without increasing emissions in the pulping of cellulosic material
US4053352A (en)	1977-10-11	Method for producing oxidized white liquor
US5082526A (en)	1992-01-21	Process of producing kraft pulping liquor by the oxidation of white liquor in the presence of lime mud
JP2796477B2 (ja)	1998-09-10	パルプ工場における白液選択酸化法と酸化白液の製法ならびに酸化反応系操作の制御法
EP0284577A2 (fr)	1988-09-28	Procédé de production de dioxyde de chlore
RU2126863C1 (ru)	1999-02-27	Способ отделения серных соединений (варианты)
US4148684A (en)	1979-04-10	Methods for recovery and recycling of chemicals from sodium sulfite and sodium bisulfite pulping operations
US2772965A (en)	1956-12-04	Recovery of chemicals in wood pulp preparation
CA1076306A (fr)	1980-04-29	Procede permettant de reduire la quantite de produits chimiques consommes sans augmentation consequente des emissions lors du pulpage de materiel cellulosique par une liqueur de sulfate basique contenant du soufre et du sodium
CA1118580A (fr)	1982-02-23	Obtention de dioxyde de chlore a faible residu de chlore
US3331732A (en)	1967-07-18	Method of removing hydrogen sulfide from an aqueous solution of alkali sulfide
US3932584A (en)	1976-01-13	Method for purifying hydrogen sulfide-containing gas
US1864619A (en)	1932-06-28	Cyclic process of fiber liberation
US2792350A (en)	1957-05-14	Treatment of sodium base sulfite residual liquor
SE411772B (sv)	1980-02-04	Sett for minskning av utsleppen till recipient och atmosfer vid uppslutning av cellulosahaltigt material
US1689534A (en)	1928-10-30	Cyclic process for the manufacture of kraft pulp
US5843316A (en)	1998-12-01	Method of separating sodium hydroxide from white liquor or polysulfide liquor using diffusion dialysis
US3554859A (en)	1971-01-12	Process for recovery of sulphur from furnaced black liquor
US5972165A (en)	1999-10-26	Method of producing oxidized white liquor using dregs containing carbon particles
US3650889A (en)	1972-03-21	Pollution controlled polysulfide recovery process
CN111542661B (zh)	2023-07-18	用于调节浆厂的S/Na平衡的方法和系统
CA1058358A (fr)	1979-07-17	Extraction du chlorure de sodium des liquides sulfuriques
CA1043516A (fr)	1978-12-05	Procede d'obtention d'une liqueur blanche oxydee
CA1174012A (fr)	1984-09-11	Methode de recuperation du gaz sulfureux libere lors le transformation chimique de produits ligno- cellulosiques en pate
US4288286A (en)	1981-09-08	Kraft mill recycle process