CA1070457A - Removal of sodium chloride from pulp mill operations - Google Patents
Removal of sodium chloride from pulp mill operationsInfo
- Publication number
- CA1070457A CA1070457A CA214,505A CA214505A CA1070457A CA 1070457 A CA1070457 A CA 1070457A CA 214505 A CA214505 A CA 214505A CA 1070457 A CA1070457 A CA 1070457A
- Authority
- CA
- Canada
- Prior art keywords
- sodium
- sodium chloride
- sodium carbonate
- solution
- aqueous solution
- 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.)
- Expired
Links
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims abstract description 323
- 239000011780 sodium chloride Substances 0.000 title claims abstract description 161
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 226
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 122
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 110
- 239000007864 aqueous solution Substances 0.000 claims abstract description 59
- 239000000243 solution Substances 0.000 claims abstract description 56
- 239000012452 mother liquor Substances 0.000 claims abstract description 49
- 229910052979 sodium sulfide Inorganic materials 0.000 claims abstract description 40
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 39
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 37
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 37
- 239000003265 pulping liquor Substances 0.000 claims abstract description 36
- 239000000126 substance Substances 0.000 claims abstract description 31
- 238000004537 pulping Methods 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 12
- 230000008021 deposition Effects 0.000 claims abstract 2
- 229940001593 sodium carbonate Drugs 0.000 claims description 105
- 235000017550 sodium carbonate Nutrition 0.000 claims description 104
- 238000000034 method Methods 0.000 claims description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 66
- 229910001868 water Inorganic materials 0.000 claims description 66
- 238000004061 bleaching Methods 0.000 claims description 40
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 39
- 229940079101 sodium sulfide Drugs 0.000 claims description 39
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 34
- 229910052708 sodium Inorganic materials 0.000 claims description 33
- 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 32
- 239000011734 sodium Substances 0.000 claims description 32
- 229960003010 sodium sulfate Drugs 0.000 claims description 28
- 238000001704 evaporation Methods 0.000 claims description 27
- 239000007787 solid Substances 0.000 claims description 27
- 229910052801 chlorine Inorganic materials 0.000 claims description 26
- 238000002425 crystallisation Methods 0.000 claims description 26
- 230000008025 crystallization Effects 0.000 claims description 26
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 25
- 239000000460 chlorine Substances 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 25
- 230000008020 evaporation Effects 0.000 claims description 25
- 238000005406 washing Methods 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims description 21
- 239000003518 caustics Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 239000004155 Chlorine dioxide Substances 0.000 claims description 17
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 15
- 238000000746 purification Methods 0.000 claims description 13
- 238000009835 boiling Methods 0.000 claims description 9
- 239000002023 wood Substances 0.000 claims description 8
- XYQRXRFVKUPBQN-UHFFFAOYSA-L Sodium carbonate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]C([O-])=O XYQRXRFVKUPBQN-UHFFFAOYSA-L 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000002657 fibrous material Substances 0.000 claims description 7
- 229940018038 sodium carbonate decahydrate Drugs 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 2
- 238000011403 purification operation Methods 0.000 claims description 2
- ZGHLCBJZQLNUAZ-UHFFFAOYSA-N sodium sulfide nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Na+].[Na+].[S-2] ZGHLCBJZQLNUAZ-UHFFFAOYSA-N 0.000 claims 13
- 229940083608 sodium hydroxide Drugs 0.000 claims 12
- 229940048181 sodium sulfide nonahydrate Drugs 0.000 claims 2
- WMDLZMCDBSJMTM-UHFFFAOYSA-M sodium;sulfanide;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Na+].[SH-] WMDLZMCDBSJMTM-UHFFFAOYSA-M 0.000 claims 2
- 238000009993 causticizing Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000011109 contamination Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 235000002639 sodium chloride Nutrition 0.000 abstract description 127
- 229960002668 sodium chloride Drugs 0.000 abstract description 117
- 241001062472 Stokellia anisodon Species 0.000 abstract description 43
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract description 30
- 238000011084 recovery Methods 0.000 abstract description 17
- 239000002655 kraft paper Substances 0.000 abstract description 11
- 150000003839 salts Chemical class 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000007844 bleaching agent Substances 0.000 description 43
- 239000002002 slurry Substances 0.000 description 14
- 238000011069 regeneration method Methods 0.000 description 12
- 230000008929 regeneration Effects 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000000706 filtrate Substances 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 5
- 238000005282 brightening Methods 0.000 description 5
- 239000007790 solid phase Substances 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 125000001309 chloro group Chemical group Cl* 0.000 description 4
- 150000004691 decahydrates Chemical class 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- NHYCGSASNAIGLD-UHFFFAOYSA-N Chlorine monoxide Chemical compound Cl[O] NHYCGSASNAIGLD-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- -1 alkali metal salts Chemical class 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 125000004436 sodium atom Chemical group 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 229940065278 sulfur compound Drugs 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000861718 Chloris <Aves> Species 0.000 description 1
- 241000243251 Hydra Species 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229910004448 Ta2C Inorganic materials 0.000 description 1
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 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
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 241000902900 cellular organisms Species 0.000 description 1
- 238000004182 chemical digestion Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000013505 freshwater Substances 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 1
- 101150085091 lat-2 gene Proteins 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- HYWYRSMBCFDLJT-UHFFFAOYSA-N nimesulide Chemical compound CS(=O)(=O)NC1=CC=C([N+]([O-])=O)C=C1OC1=CC=CC=C1 HYWYRSMBCFDLJT-UHFFFAOYSA-N 0.000 description 1
- 229960000965 nimesulide Drugs 0.000 description 1
- 150000004690 nonahydrates Chemical class 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229940083542 sodium Drugs 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 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
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- 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
- D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S423/00—Chemistry of inorganic compounds
- Y10S423/03—Papermaking liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US420876A US3909344A (en) | 1973-12-03 | 1973-12-03 | Removal of sodium chloride from pulp mill operations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070457A true CA1070457A (en) | 1980-01-29 |
Family
ID=23668199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA214,505A Expired CA1070457A (en) | 1973-12-03 | 1974-11-25 | Removal of sodium chloride from pulp mill operations |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3909344A (enExample) |
| JP (1) | JPS5088303A (enExample) |
| BR (1) | BR7410122A (enExample) |
| CA (1) | CA1070457A (enExample) |
| FI (1) | FI344574A7 (enExample) |
| SE (1) | SE7414971L (enExample) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1058358A (en) * | 1973-08-07 | 1979-07-17 | Erco Envirotech Ltd. | Removal of dissolved salts from sulphide liquors |
| FI53728C (fi) * | 1974-03-12 | 1978-07-10 | Ahlstroem Oy | Foerfarande foer aotervinning av kemikalier ur avlutar fraon sulfatcellulosakok och avfallsvatten fraon blekning |
| US3954552A (en) * | 1974-08-05 | 1976-05-04 | Erco Envirotech Ltd. | Removal of sodium chloride from pulp mill systems |
| US3945880A (en) * | 1974-08-05 | 1976-03-23 | Erco Envirotech Ltd. | Sodium chloride removal in pulp mill systems |
| ZA761255B (en) * | 1975-03-11 | 1977-03-30 | Erco Envirotech Ltd | Bleachplant operation |
| US4049490A (en) * | 1976-02-23 | 1977-09-20 | Veniamin Petrovich Zaplatin | Electrodialysis of bleaching effluent |
| ZA762995B (en) * | 1976-05-19 | 1977-07-27 | Sappi Ltd | Improvements relating to recovery of chemicals |
| SE434860B (sv) * | 1976-11-15 | 1984-08-20 | Mo Och Domsjoe Ab | Forfarande for utstotning av klorider ur kemikalieatervinningssystem vid natriumbaserade massaframstellningsprocesser |
| CA1113207A (en) * | 1978-04-19 | 1981-12-01 | Allan F. Gilbert | Removal of potassium values from pulp mill liquors |
| FI77064C (fi) * | 1985-04-29 | 1989-01-10 | Tampella Oy Ab | Foerfarande foer kokning och blekning av cellulosa. |
| SE8605120L (sv) * | 1986-08-14 | 1988-02-15 | Alby Klorat Ab | Sett att bereda sulfidfri alkalilut |
| CA2103066C (en) * | 1991-05-13 | 2001-04-24 | Patrik P. H. Lownertz | White liquor preparation and pulping process |
| FI95608B (fi) * | 1994-06-17 | 1995-11-15 | Ahlstroem Oy | Menetelmä keittolipeiden valmistamiseksi viherlipeää kiteyttämällä |
| US5567293A (en) * | 1994-12-22 | 1996-10-22 | Pulp And Paper Research Institute Of Canada | Electromembrane processes for the treatment of kraft mill electrostatic precipitator catch |
| WO2013040205A1 (en) * | 2011-09-16 | 2013-03-21 | Sabic Innovative Plastics Ip B.V. | Method to remove carbonate from a caustic scrubber waste stream |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1791281A (en) * | 1929-04-29 | 1931-02-03 | Morse Harry Wheeler | Production of sodium-carbonate liquor |
| US2642399A (en) * | 1949-02-23 | 1953-06-16 | Robert S Aries | Process for dissolving ash containing sodium sulfide and sodium carbonate |
| US2862887A (en) * | 1955-10-03 | 1958-12-02 | Western Preciptation Corp | Process for production and separation of sodium sulfide and sodium carbonate from spent liquors |
| US3396076A (en) * | 1964-12-10 | 1968-08-06 | Parkinson Crosby & Works Inc | Method of recovery of chemical values of a kraft pulping process of cellulosic material |
| GB1217833A (en) * | 1967-01-16 | 1970-12-31 | Electric Reduction Co | Improved cellulosic pulp process |
| US3560329A (en) * | 1968-12-27 | 1971-02-02 | Combustion Eng | Process for low sulfide chemical recovery |
| US3746612A (en) * | 1969-12-30 | 1973-07-17 | Erco Envirotech Ltd | Removal of sodium chloride from white pulping liquor |
| CA947010A (en) * | 1971-02-23 | 1974-05-14 | Erco Envirotech Ltd. | Chlorination of alkali metal carbonates recovered from the production of pulp |
-
1973
- 1973-12-03 US US420876A patent/US3909344A/en not_active Expired - Lifetime
-
1974
- 1974-11-18 SE SE7414971A patent/SE7414971L/xx unknown
- 1974-11-25 CA CA214,505A patent/CA1070457A/en not_active Expired
- 1974-11-28 FI FI3445/74A patent/FI344574A7/fi unknown
- 1974-12-03 JP JP49137778A patent/JPS5088303A/ja active Pending
- 1974-12-03 BR BR10122/74A patent/BR7410122A/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR7410122A (pt) | 1976-06-08 |
| SE7414971L (enExample) | 1975-06-04 |
| JPS5088303A (enExample) | 1975-07-16 |
| FI344574A7 (enExample) | 1975-06-04 |
| US3909344A (en) | 1975-09-30 |
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