FI78747B - Foerfarande foer framstaellning av kvaeveoxider. - Google Patents
Foerfarande foer framstaellning av kvaeveoxider. Download PDFInfo
- Publication number
- FI78747B FI78747B FI851230A FI851230A FI78747B FI 78747 B FI78747 B FI 78747B FI 851230 A FI851230 A FI 851230A FI 851230 A FI851230 A FI 851230A FI 78747 B FI78747 B FI 78747B
- Authority
- FI
- Finland
- Prior art keywords
- waste liquor
- nitrogen
- lignin
- nitrogen oxides
- process according
- Prior art date
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 276
- 239000002699 waste material Substances 0.000 claims description 109
- 238000000034 method Methods 0.000 claims description 61
- 229920005610 lignin Polymers 0.000 claims description 51
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 37
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims description 35
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 31
- 238000004519 manufacturing process Methods 0.000 claims description 30
- 229910017604 nitric acid Inorganic materials 0.000 claims description 30
- 229910002651 NO3 Inorganic materials 0.000 claims description 25
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 20
- -1 hydrogen ions Chemical class 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000005416 organic matter Substances 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000010411 cooking Methods 0.000 claims description 6
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 4
- 150000002830 nitrogen compounds Chemical group 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 35
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 25
- 229910001882 dioxygen Inorganic materials 0.000 description 25
- 239000007789 gas Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 230000035484 reaction time Effects 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 8
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 8
- 229910021653 sulphate ion Inorganic materials 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 238000007792 addition Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004317 sodium nitrate Substances 0.000 description 4
- 235000010344 sodium nitrate Nutrition 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000004061 bleaching Methods 0.000 description 3
- 239000001272 nitrous oxide Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000012978 lignocellulosic material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 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 1
- NGWKGSCSHDHHAJ-YPFQVHCOSA-N Liquoric acid Chemical compound C1C[C@H](O)C(C)(C)C2CC[C@@]3(C)[C@]4(C)C[C@H]5O[C@@H]([C@](C6)(C)C(O)=O)C[C@@]5(C)[C@@H]6C4=CC(=O)C3[C@]21C NGWKGSCSHDHHAJ-YPFQVHCOSA-N 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011078 in-house production Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/36—Nitrogen dioxide (NO2, N2O4)
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/24—Nitric oxide (NO)
-
- 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
- D21C11/0042—Fractionating or concentration of spent liquors by special methods
-
- 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)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Catalysts (AREA)
- Saccharide Compounds (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Detergent Compositions (AREA)
Claims (9)
1. Förfarande för framställning av kväveoxider i samband med framstälIning av cellulosamassa där organisk substans in-nehällande avlut uppkommer, kannetecknat av att ätminstone en del av avluten i närvaro av salpetersyra utsättes för en sädan behandling, att en autokatalytisk process ästadkommes genom att minst en, företrädesvis minst tvä, av följande it- 2i 78747 gärder vidtagee; a) uppvärmning av avluten och/eller avdunetning av vatten frAn avluten, b) tillförande av etark eyra tili avluten, c) tillförande av lignin till avluten, d) eammanbringande av avluten med kväveoxid, företrädeevie kvävedioxid, ledande tili att närvarande kväveföreningar eönderdelae och ger upphov tili kvävemonoxid och/eller kvävedioxid, vilka i gaeform avekiljee f r An avluten.
2. Förfarande enligt patentkravet 1, kannetecknat av att den autokatalytieka proceeeen utföree inom temperaturin- o o tervailet 40-180 C, lämpligen 55-170 C, företrädeevie o 65-160 C och företrädeevie vid en med behandlingetiden ökande temperatur.
3. Förfarande enligt patentkraven 1-2, kännetecknat av att pH-värdet hoe avluten vid den autokatalytieka proceeeene början brmgae att underetiga 2, lämpligen 1, företrädeevie 0,5.
4. Förfarande enligt patentkraven 1-3, kännetecknat av att nitrathalten i avluten vid den autokatalytieka proceeeene början reglerae eA, att den uppgAr tili 0,2-5, lämpligen 0,4-4, företrädeevie 0,5-3 gmoler per kg vatten i avluten. Förfarande enligt patentkraven 1-4, kännetecknat av att lignin i form av 1igninkoncentrat frän kokavlut och/eller kokavlut tillföree eller utgör en del av avluten. Förfarande enligt patentkraven 1-5, kännetecknat av att viktförhällandet lignin:vatten i avluten bringae att lig-9a inom intervallet 0,001-1,0, lämpligen 0,005-0,80, företra-deevie 0,02-0,40.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8401716A SE452176B (sv) | 1984-03-28 | 1984-03-28 | Forfarande for framstellning av kveveoxider ur avlutar fran cellulosamassatillverkning |
| SE8401716 | 1984-03-28 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| FI851230A0 FI851230A0 (fi) | 1985-03-27 |
| FI851230L FI851230L (fi) | 1985-09-29 |
| FI78747B true FI78747B (fi) | 1989-05-31 |
| FI78747C FI78747C (sv) | 1989-09-11 |
Family
ID=20355335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI851230A FI78747C (sv) | 1984-03-28 | 1985-03-27 | Förfarande för framställning av kväveoxider. |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4725335A (sv) |
| JP (1) | JPS60210510A (sv) |
| AT (1) | AT398193B (sv) |
| AU (1) | AU571317B2 (sv) |
| CA (1) | CA1240812A (sv) |
| DE (1) | DE3511366C2 (sv) |
| FI (1) | FI78747C (sv) |
| FR (1) | FR2562105B1 (sv) |
| NO (1) | NO163372C (sv) |
| NZ (1) | NZ211350A (sv) |
| SE (1) | SE452176B (sv) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456799A (en) * | 1989-01-19 | 1995-10-10 | Mo Och Domsjo Aktiebolag | Method for controlling activation of lignocellulosic material in the presence of a nitrate containing liquid |
| US5043488A (en) * | 1990-03-12 | 1991-08-27 | J. G. S. Research Company, Inc. | Process for preparing an explosive and the product therefrom |
| 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 |
| US8303767B2 (en) * | 2008-03-18 | 2012-11-06 | The Research Foundation Of State University Of New York | Methods of pretreating comminuted cellulosic material with carbonate-containing solutions |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE366543C (de) * | 1919-11-16 | 1923-01-08 | Wilhelm Schwarzenauer | Verfahren zur Beseitigung von Abwaessern |
| FR669791A (fr) * | 1928-03-03 | 1929-11-20 | Ig Farbenindustrie Ag | Procédé pour l'absorption de gaz nitrés dilués |
| DE518154C (de) * | 1929-01-09 | 1931-02-12 | I G Farbenindustrie Akt Ges | Verfahren zur Herstellung von Zellstoff |
| NL254191A (sv) * | 1959-07-29 | |||
| US3070591A (en) * | 1960-08-24 | 1962-12-25 | Crown Zellerbach Corp | Modified sulfonated lignin material and process of producing the same |
| US3578553A (en) * | 1968-09-10 | 1971-05-11 | Int Paper Canada | Nitrogen dioxide pulping process |
| JPS4884463A (sv) * | 1972-02-14 | 1973-11-09 | ||
| US4076579A (en) * | 1973-08-06 | 1978-02-28 | The Regents Of The University Of California | Pulping of lignocellulosic material by sequential treatment thereof with nitric oxide and oxygen |
| JPS50154172A (sv) * | 1974-05-23 | 1975-12-11 | ||
| JPS52138480A (en) * | 1976-05-17 | 1977-11-18 | Babcock Hitachi Kk | Treatment of absorbent |
| ATE10017T1 (de) * | 1979-07-19 | 1984-11-15 | Eric S. Prior | Beschleunigtes aufschliessverfahren. |
| SE441192B (sv) * | 1980-05-27 | 1985-09-16 | Mo Och Domsjoe Ab | Forfarande for delignifiering av kemisk cellulosamassa med syrgas i nervaro av ett eller flera neutralisationsmedel |
| SE421938B (sv) * | 1980-06-05 | 1982-02-08 | Mo Och Domsjoe Ab | Forfarande for behandling av cellulosamassa med kveveoxider fore syrgasblekning |
-
1984
- 1984-03-28 SE SE8401716A patent/SE452176B/sv not_active IP Right Cessation
-
1985
- 1985-03-07 NZ NZ211350A patent/NZ211350A/xx unknown
- 1985-03-19 JP JP60056280A patent/JPS60210510A/ja active Granted
- 1985-03-21 AU AU40190/85A patent/AU571317B2/en not_active Ceased
- 1985-03-27 AT AT0091285A patent/AT398193B/de not_active IP Right Cessation
- 1985-03-27 FI FI851230A patent/FI78747C/sv not_active IP Right Cessation
- 1985-03-27 NO NO851242A patent/NO163372C/no unknown
- 1985-03-28 CA CA000477764A patent/CA1240812A/en not_active Expired
- 1985-03-28 FR FR8504633A patent/FR2562105B1/fr not_active Expired
- 1985-03-28 US US06/716,418 patent/US4725335A/en not_active Expired - Fee Related
- 1985-03-28 DE DE3511366A patent/DE3511366C2/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI78747C (sv) | 1989-09-11 |
| JPS60210510A (ja) | 1985-10-23 |
| FI851230A0 (fi) | 1985-03-27 |
| NO851242L (no) | 1985-09-30 |
| FR2562105B1 (fr) | 1987-01-23 |
| AU571317B2 (en) | 1988-04-14 |
| DE3511366A1 (de) | 1985-10-10 |
| JPH0456770B2 (sv) | 1992-09-09 |
| SE8401716L (sv) | 1985-09-29 |
| NZ211350A (en) | 1988-09-29 |
| DE3511366C2 (de) | 1994-07-07 |
| AT398193B (de) | 1994-10-25 |
| NO163372B (no) | 1990-02-05 |
| FR2562105A1 (fr) | 1985-10-04 |
| CA1240812A (en) | 1988-08-23 |
| US4725335A (en) | 1988-02-16 |
| ATA91285A (de) | 1994-02-15 |
| FI851230L (fi) | 1985-09-29 |
| SE452176B (sv) | 1987-11-16 |
| AU4019085A (en) | 1985-10-03 |
| SE8401716D0 (sv) | 1984-03-28 |
| NO163372C (no) | 1990-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI69135C (fi) | Foerfarande foer syrgasblekning av cellulosamassa | |
| AU657648B2 (en) | A process for continuously producing chlorine dioxide | |
| CA1150011A (en) | Method at bleaching ligno-cellulose containing material | |
| UA71973C2 (uk) | Композиція для одержання діоксиду хлору та спосіб його одержання (варіанти) | |
| FI78747B (fi) | Foerfarande foer framstaellning av kvaeveoxider. | |
| RU2519108C2 (ru) | Получение диоксида хлора | |
| US4098886A (en) | Gas purification liquors | |
| US4756800A (en) | Method for producing salts of monoperoxysulfuric acid and simultaneously bleaching pulp | |
| EP0670000B1 (en) | Method for acidification of soap with sodium bisulphite solution | |
| US20050087315A1 (en) | Low consistency oxygen delignification process | |
| US3058808A (en) | Production of chlorine dioxide | |
| US2916516A (en) | Evaporation of aqueous urea solutions | |
| US3110563A (en) | Process for the production of high percentage nitric oxide | |
| US3654071A (en) | Process for replacing sodium and sulfur losses and for controlling the sulfide content in sodium- and sulfur-containing cellulosic digesting liquors | |
| CA2003416A1 (en) | Procedure for the production of chlorine dioxide | |
| US3325275A (en) | Process for producing nitrogen-rich organic materials especially for use as fertilizers | |
| FI77830B (fi) | Hoegproduktiv klordioxidprocess. | |
| Mathew et al. | Preparation of oxalic acid from jute stick, an agrowaste | |
| NO160384B (no) | Fremgangsmaate ved fremstilling av cellulosemasse av ved ifoelge sulfatmetoden. | |
| CN113800472A (zh) | 一种稳定性二氧化氯漂白溶液的制备方法 | |
| US4853082A (en) | Process for the activation and delignification of cellulose pulp | |
| NO145039B (no) | Anvendelse av 3,5-difenylpyrazoliumsalter for bekjempelse av fytopatogene fungi | |
| US3337294A (en) | Process for recovering sodium carbonate and hydrogen sulfide from spent cooking liquor | |
| US2605168A (en) | Process for the preparation of chlorine dioxide | |
| FI85007B (fi) | Foerfarande foer framstaellning av saltsyra. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM | Patent lapsed | ||
| MM | Patent lapsed |
Owner name: MO OCH DOMSJOE AB |