CA1058358A - Removal of dissolved salts from sulphide liquors - Google Patents
Removal of dissolved salts from sulphide liquorsInfo
- Publication number
- CA1058358A CA1058358A CA206,076A CA206076A CA1058358A CA 1058358 A CA1058358 A CA 1058358A CA 206076 A CA206076 A CA 206076A CA 1058358 A CA1058358 A CA 1058358A
- Authority
- CA
- Canada
- Prior art keywords
- sodium
- sulphide
- sodium chloride
- solution
- aqueous
- 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
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 title description 8
- 150000003839 salts Chemical class 0.000 title description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 565
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 349
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 322
- 239000011780 sodium chloride Substances 0.000 claims abstract description 283
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract description 252
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 171
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 160
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 160
- 238000000034 method Methods 0.000 claims abstract description 100
- 239000007864 aqueous solution Substances 0.000 claims abstract description 73
- 239000007787 solid Substances 0.000 claims abstract description 44
- 238000005194 fractionation Methods 0.000 claims abstract description 11
- 235000002639 sodium chloride Nutrition 0.000 claims description 234
- 239000000243 solution Substances 0.000 claims description 186
- 235000017550 sodium carbonate Nutrition 0.000 claims description 168
- 229940001593 sodium carbonate Drugs 0.000 claims description 168
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 143
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 114
- 239000000203 mixture Substances 0.000 claims description 59
- 238000004061 bleaching Methods 0.000 claims description 58
- 239000003265 pulping liquor Substances 0.000 claims description 42
- 239000000126 substance Substances 0.000 claims description 40
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 36
- 238000001704 evaporation Methods 0.000 claims description 35
- 229910052801 chlorine Inorganic materials 0.000 claims description 29
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 28
- 238000009835 boiling Methods 0.000 claims description 28
- 239000000460 chlorine Substances 0.000 claims description 28
- 238000002386 leaching Methods 0.000 claims description 27
- 238000000746 purification Methods 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 24
- 238000005406 washing Methods 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 22
- 239000008247 solid mixture Substances 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 20
- 239000003518 caustics Substances 0.000 claims description 19
- 238000004537 pulping Methods 0.000 claims description 19
- 239000004155 Chlorine dioxide Substances 0.000 claims description 18
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 18
- 239000000306 component Substances 0.000 claims description 18
- 239000012452 mother liquor Substances 0.000 claims description 17
- 239000013078 crystal Substances 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 11
- 239000002657 fibrous material Substances 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 230000008021 deposition Effects 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000011403 purification operation Methods 0.000 claims description 2
- 239000012736 aqueous medium Substances 0.000 claims 11
- 238000004064 recycling Methods 0.000 claims 9
- 238000002156 mixing Methods 0.000 claims 7
- 238000009993 causticizing Methods 0.000 claims 6
- 238000007599 discharging Methods 0.000 claims 5
- 238000007865 diluting Methods 0.000 claims 2
- SDCJMBBHNJPYGW-UHFFFAOYSA-L disodium;hydrogen carbonate;chloride Chemical compound [Na+].[Na+].Cl.[O-]C([O-])=O SDCJMBBHNJPYGW-UHFFFAOYSA-L 0.000 claims 1
- 241001062472 Stokellia anisodon Species 0.000 abstract description 76
- 239000002655 kraft paper Substances 0.000 abstract description 5
- 241001417490 Sillaginidae Species 0.000 abstract 1
- 239000007844 bleaching agent Substances 0.000 description 50
- 241000196324 Embryophyta Species 0.000 description 43
- 230000008020 evaporation Effects 0.000 description 31
- 230000004048 modification Effects 0.000 description 22
- 238000012986 modification Methods 0.000 description 22
- 229910052708 sodium Inorganic materials 0.000 description 21
- 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 description 20
- 239000011734 sodium Substances 0.000 description 20
- 238000011084 recovery Methods 0.000 description 16
- 239000002244 precipitate Substances 0.000 description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 238000005755 formation reaction Methods 0.000 description 10
- 238000011069 regeneration method Methods 0.000 description 10
- 230000008929 regeneration Effects 0.000 description 9
- 238000010790 dilution Methods 0.000 description 7
- 239000012895 dilution Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000005282 brightening Methods 0.000 description 5
- 235000010216 calcium carbonate Nutrition 0.000 description 5
- 229960003563 calcium carbonate Drugs 0.000 description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 230000029087 digestion Effects 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 229910052979 sodium sulfide Inorganic materials 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 125000001309 chloro group Chemical group Cl* 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 238000001556 precipitation Methods 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
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000543 intermediate Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- -1 Alkali metal salts Chemical class 0.000 description 2
- NHYCGSASNAIGLD-UHFFFAOYSA-N Chlorine monoxide Chemical compound Cl[O] NHYCGSASNAIGLD-UHFFFAOYSA-N 0.000 description 2
- XIUMQSREFXCDGE-UHFFFAOYSA-L S(=O)(=O)([O-])O.[Na+].[Cl-].[Na+] Chemical compound S(=O)(=O)([O-])O.[Na+].[Cl-].[Na+] XIUMQSREFXCDGE-UHFFFAOYSA-L 0.000 description 2
- 239000004133 Sodium thiosulphate Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- OHDVHWAWMUKQFF-UHFFFAOYSA-N [O].[Na].[S] Chemical class [O].[Na].[S] OHDVHWAWMUKQFF-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 125000004436 sodium atom Chemical group 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 241000861718 Chloris <Aves> Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 244000228957 Ferula foetida Species 0.000 description 1
- XDXHAEQXIBQUEZ-UHFFFAOYSA-N Ropinirole hydrochloride Chemical compound Cl.CCCN(CCC)CCC1=CC=CC2=C1CC(=O)N2 XDXHAEQXIBQUEZ-UHFFFAOYSA-N 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-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
- 230000002730 additional effect Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000011575 calcium Substances 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
- 230000008859 change Effects 0.000 description 1
- 238000004182 chemical digestion Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- ZLCCLBKPLLUIJC-UHFFFAOYSA-L disodium tetrasulfane-1,4-diide Chemical compound [Na+].[Na+].[S-]SS[S-] ZLCCLBKPLLUIJC-UHFFFAOYSA-L 0.000 description 1
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- LMAZKPOSWVOFGY-FBAUPLQOSA-N orine Natural products CO[C@H]1C[C@H](O[C@H]2CC[C@]3(C)[C@H]4C[C@@H](OC(=O)C=Cc5ccccc5)[C@]6(C)[C@@](O)(CC[C@]6(O)[C@]4(O)CC=C3C2)[C@H](C)OC(=O)C=Cc7ccccc7)O[C@H](C)[C@H]1O LMAZKPOSWVOFGY-FBAUPLQOSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 235000015424 sodium Nutrition 0.000 description 1
- 229940076133 sodium carbonate monohydrate Drugs 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 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
- 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
- 239000012265 solid product Substances 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
- 239000002699 waste material 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
-
- 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
- C01D3/08—Preparation by working up natural or industrial salt mixtures or siliceous minerals
-
- 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
- D21C11/0078—Treatment of green or white liquors with other means or other compounds than gases, e.g. in order to separate solid compounds such as sodium chloride and carbonate from these liquors; Further treatment of these compounds
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
-
- 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
- Y10S162/00—Paper making and fiber liberation
- Y10S162/08—Chlorine-containing liquid regeneration
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3741373 | 1973-08-07 | ||
| AU80898/75A AU514721B2 (en) | 1973-08-07 | 1977-05-07 | Regeneration of pulping liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1058358A true CA1058358A (en) | 1979-07-17 |
Family
ID=25639602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA206,076A Expired CA1058358A (en) | 1973-08-07 | 1974-07-31 | Removal of dissolved salts from sulphide liquors |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3986923A (enExample) |
| JP (1) | JPS5087991A (enExample) |
| AU (1) | AU514721B2 (enExample) |
| CA (1) | CA1058358A (enExample) |
| FR (1) | FR2240185B1 (enExample) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI53728C (fi) * | 1974-03-12 | 1978-07-10 | Ahlstroem Oy | Foerfarande foer aotervinning av kemikalier ur avlutar fraon sulfatcellulosakok och avfallsvatten fraon blekning |
| US3945880A (en) * | 1974-08-05 | 1976-03-23 | Erco Envirotech Ltd. | Sodium chloride removal in pulp mill systems |
| US3954552A (en) * | 1974-08-05 | 1976-05-04 | Erco Envirotech Ltd. | Removal of sodium chloride from pulp mill systems |
| CA1096113A (en) * | 1975-11-24 | 1981-02-24 | Owens-Illinois, Inc. | Fluidized bed recovery of sodium carbonate from spent cooking liquor |
| WO1989004395A1 (en) * | 1987-11-06 | 1989-05-18 | Kurple Kenneth R | Kraft chemical recovery process |
| US5034094A (en) * | 1987-11-06 | 1991-07-23 | Kurple Kenneth R | Method of converting inorganic materials from kraft pulping liquor into pulping chemicals without passing them through a recovery furnace |
| SI2231887T1 (sl) * | 2007-12-24 | 2013-12-31 | Foseco International Limited | Izboljšan spremenjen tok za staljen aluminij |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1906886A (en) * | 1927-11-23 | 1933-05-02 | Brown Co | Process of recovering and utilizing the valuable compounds in spent cooking liquors |
| GB1217833A (en) * | 1967-01-16 | 1970-12-31 | Electric Reduction Co | Improved cellulosic pulp process |
| US3746612A (en) * | 1969-12-30 | 1973-07-17 | Erco Envirotech Ltd | Removal of sodium chloride from white pulping liquor |
| SE362453C (sv) * | 1971-02-05 | 1976-03-08 | Mo Och Domsjoe Ab | Sett att forhindra utslepp av klorhaltiga fororeningar vid natriumbaserade cellulosafabriker |
| JPS4943482B2 (enExample) * | 1971-11-02 | 1974-11-21 | ||
| JPS5510716B2 (enExample) * | 1971-11-02 | 1980-03-18 | ||
| US3909344A (en) * | 1973-12-03 | 1975-09-30 | Erco Envirotech Ltd | Removal of sodium chloride from pulp mill operations |
| US3945880A (en) * | 1974-08-05 | 1976-03-23 | Erco Envirotech Ltd. | Sodium chloride removal in pulp mill systems |
-
1974
- 1974-07-31 CA CA206,076A patent/CA1058358A/en not_active Expired
- 1974-08-05 US US05/494,898 patent/US3986923A/en not_active Expired - Lifetime
- 1974-08-07 JP JP49089907A patent/JPS5087991A/ja active Pending
- 1974-08-07 FR FR7427482A patent/FR2240185B1/fr not_active Expired
-
1977
- 1977-05-07 AU AU80898/75A patent/AU514721B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU8089875A (en) | 1976-11-11 |
| AU514721B2 (en) | 1981-02-26 |
| JPS5087991A (enExample) | 1975-07-15 |
| FR2240185B1 (enExample) | 1979-08-03 |
| FR2240185A1 (enExample) | 1975-03-07 |
| US3986923A (en) | 1976-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4039372A (en) | Bleach plant filtrate recovery | |
| US3909344A (en) | Removal of sodium chloride from pulp mill operations | |
| US3746612A (en) | Removal of sodium chloride from white pulping liquor | |
| US3833462A (en) | Process of removing sodium chloride from kraft pulping process chemical recovery systems | |
| US3366534A (en) | Complete chemical system for a kraft mill | |
| US3954552A (en) | Removal of sodium chloride from pulp mill systems | |
| CA1058358A (en) | Removal of dissolved salts from sulphide liquors | |
| US4329199A (en) | Process for digesting and bleaching cellulosic material with reduced emissions | |
| EP0599917B1 (en) | Production of alkali metal hydroxide and regeneration of pulp liquors | |
| US3950217A (en) | Removal of sodium chloride from pulping operations | |
| US4093508A (en) | Process for recovering chemicals from the waste liquors of sulfate cellulose digestion and the waste waters of bleaching | |
| US3945880A (en) | Sodium chloride removal in pulp mill systems | |
| US4249990A (en) | Process for removal of potassium values from pulp mill liquors | |
| US5607548A (en) | Process for dividing the sulphide content of the green liquor for the production of white liquors having high and low sulphidity | |
| US4253911A (en) | Process for maintaining a low sodium chloride content in recycled sodium chemicals of sodium-based pulp manufacturing processes | |
| US5507912A (en) | Kraft pulping process wherein sulphide-rich and sulphide-lean white liquors are generated | |
| CA1059271A (en) | Removal of sodium chloride from pulp mill systems | |
| US3996097A (en) | Kraft mill recovery system | |
| CA1109611A (en) | Potassium-based pulp mill process | |
| CA1057909A (en) | Production of chlorine dioxide | |
| US3740307A (en) | Recovery of sodium chloride from white pulping liquor | |
| US3740308A (en) | Recovery of sodium chloride from spent pulping liquors | |
| CA1102055A (en) | Modified system for recovery of sodium chloride from white liquor | |
| SU1109057A3 (ru) | Способ получени целлюлозы | |
| FI58523B (fi) | Foerfarande foer regenerering av avlutar i en massakoknings- och regenereringscykel |