NO312131B1 - Fremgangsmåte for å fjerne natriumsulfat fra en fosfatlösning - Google Patents

Fremgangsmåte for å fjerne natriumsulfat fra en fosfatlösning Download PDF

Info

Publication number: NO312131B1
Authority: NO; Norway
Prior art keywords: phosphate; water; solution; absorption; sodium
Prior art date: 2000-03-06

Application number

NO20001137A

Other languages

English (en)

Norwegian (no)

Other versions

NO20001137L (no

NO20001137D0 (no

Inventor

Olav Erga

Original Assignee

Olav Erga

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.)

2000-03-06

Filing date

2000-03-06

Publication date

2002-03-25

2000-03-06 Application filed by Olav Erga filed Critical Olav Erga

2000-03-06 Priority to NO20001137A priority Critical patent/NO312131B1/no

2000-03-06 Publication of NO20001137D0 publication Critical patent/NO20001137D0/no

2001-03-02 Priority to PCT/NO2001/000084 priority patent/WO2001066235A1/en

2001-03-02 Priority to MXPA02008809A priority patent/MXPA02008809A/es

2001-03-02 Priority to CA002402057A priority patent/CA2402057C/en

2001-03-02 Priority to AU2001239591A priority patent/AU2001239591A1/en

2001-03-02 Priority to AT01914246T priority patent/ATE254950T1/de

2001-03-02 Priority to BRPI0109015-1A priority patent/BR0109015B1/pt

2001-03-02 Priority to JP2001564880A priority patent/JP4464592B2/ja

2001-03-02 Priority to ES01914246T priority patent/ES2211782T3/es

2001-03-02 Priority to CNB01806177XA priority patent/CN1199715C/zh

2001-03-02 Priority to US10/220,691 priority patent/US6960332B2/en

2001-03-02 Priority to DE60101321T priority patent/DE60101321T2/de

2001-03-02 Priority to EP01914246A priority patent/EP1265692B1/de

2001-09-07 Publication of NO20001137L publication Critical patent/NO20001137L/no

2002-03-25 Publication of NO312131B1 publication Critical patent/NO312131B1/no

Links

238000000034 method Methods 0.000 title claims abstract description 49
PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 title claims abstract description 16
229910019142 PO4 Inorganic materials 0.000 title claims abstract description 15
239000010452 phosphate Substances 0.000 title claims abstract description 15
NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 14
229910052938 sodium sulfate Inorganic materials 0.000 title claims abstract description 11
235000011152 sodium sulphate Nutrition 0.000 title claims abstract description 11
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
238000010521 absorption reaction Methods 0.000 claims abstract description 17
238000001704 evaporation Methods 0.000 claims abstract description 15
230000008020 evaporation Effects 0.000 claims abstract description 15
239000002244 precipitate Substances 0.000 claims abstract description 10
BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims abstract description 6
239000000706 filtrate Substances 0.000 claims abstract description 4
AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims abstract description 3
RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 52
239000007789 gas Substances 0.000 claims description 13
238000001556 precipitation Methods 0.000 claims description 7
HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 4
235000010262 sodium metabisulphite Nutrition 0.000 claims description 4
DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 2
239000012065 filter cake Substances 0.000 claims description 2
235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 2
239000004289 sodium hydrogen sulphite Substances 0.000 claims description 2
238000012546 transfer Methods 0.000 claims description 2
239000000243 solution Substances 0.000 abstract description 14
238000001914 filtration Methods 0.000 abstract description 6
239000007864 aqueous solution Substances 0.000 abstract 1
239000003546 flue gas Substances 0.000 abstract 1
230000009466 transformation Effects 0.000 abstract 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 17
239000007788 liquid Substances 0.000 description 14
229910021653 sulphate ion Inorganic materials 0.000 description 14
239000007787 solid Substances 0.000 description 13
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
239000007853 buffer solution Substances 0.000 description 10
229910000397 disodium phosphate Inorganic materials 0.000 description 10
239000000872 buffer Substances 0.000 description 7
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
230000015572 biosynthetic process Effects 0.000 description 6
239000011734 sodium Substances 0.000 description 6
229910000162 sodium phosphate Inorganic materials 0.000 description 6
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
239000001488 sodium phosphate Substances 0.000 description 5
235000011008 sodium phosphates Nutrition 0.000 description 5
RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 5
238000006243 chemical reaction Methods 0.000 description 4
230000003647 oxidation Effects 0.000 description 4
238000007254 oxidation reaction Methods 0.000 description 4
239000000047 product Substances 0.000 description 4
238000011084 recovery Methods 0.000 description 4
230000001172 regenerating effect Effects 0.000 description 4
235000011121 sodium hydroxide Nutrition 0.000 description 4
239000000126 substance Substances 0.000 description 4
239000002250 absorbent Substances 0.000 description 3
230000002745 absorbent Effects 0.000 description 3
239000012452 mother liquor Substances 0.000 description 3
238000000746 purification Methods 0.000 description 3
229910052717 sulfur Inorganic materials 0.000 description 3
239000011593 sulfur Substances 0.000 description 3
238000005406 washing Methods 0.000 description 3
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
230000002378 acidificating effect Effects 0.000 description 2
TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
238000005119 centrifugation Methods 0.000 description 2
239000000356 contaminant Substances 0.000 description 2
235000019800 disodium phosphate Nutrition 0.000 description 2
239000011521 glass Substances 0.000 description 2
238000010438 heat treatment Methods 0.000 description 2
-1 hydronium ions Chemical class 0.000 description 2
238000004519 manufacturing process Methods 0.000 description 2
239000000203 mixture Substances 0.000 description 2
239000010413 mother solution Substances 0.000 description 2
150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
230000008929 regeneration Effects 0.000 description 2
238000011069 regeneration method Methods 0.000 description 2
238000000926 separation method Methods 0.000 description 2
239000007858 starting material Substances 0.000 description 2
238000003756 stirring Methods 0.000 description 2
239000000725 suspension Substances 0.000 description 2
LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
101100283604 Caenorhabditis elegans pigk-1 gene Proteins 0.000 description 1
235000008733 Citrus aurantifolia Nutrition 0.000 description 1
229910004879 Na2S2O5 Inorganic materials 0.000 description 1
239000007832 Na2SO4 Substances 0.000 description 1
NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 description 1
229910000831 Steel Inorganic materials 0.000 description 1
239000005864 Sulphur Substances 0.000 description 1
235000011941 Tilia x europaea Nutrition 0.000 description 1
239000002253 acid Substances 0.000 description 1
239000012062 aqueous buffer Substances 0.000 description 1
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
150000001768 cations Chemical class 0.000 description 1
239000003153 chemical reaction reagent Substances 0.000 description 1
238000004140 cleaning Methods 0.000 description 1
238000009833 condensation Methods 0.000 description 1
230000005494 condensation Effects 0.000 description 1
238000011161 development Methods 0.000 description 1
230000018109 developmental process Effects 0.000 description 1
NBIIXXVUZAFLBC-UHFFFAOYSA-M dihydrogenphosphate Chemical compound OP(O)([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-M 0.000 description 1
238000007323 disproportionation reaction Methods 0.000 description 1
230000000694 effects Effects 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
238000002474 experimental method Methods 0.000 description 1
230000002349 favourable effect Effects 0.000 description 1
239000002737 fuel gas Substances 0.000 description 1
239000004571 lime Substances 0.000 description 1
229910052757 nitrogen Inorganic materials 0.000 description 1
239000001301 oxygen Substances 0.000 description 1
229910052760 oxygen Inorganic materials 0.000 description 1
230000020477 pH reduction Effects 0.000 description 1
239000002245 particle Substances 0.000 description 1
239000008363 phosphate buffer Substances 0.000 description 1
238000011085 pressure filtration Methods 0.000 description 1
238000004064 recycling Methods 0.000 description 1
230000000717 retained effect Effects 0.000 description 1
150000003839 salts Chemical class 0.000 description 1
238000007086 side reaction Methods 0.000 description 1
239000002002 slurry Substances 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
229910000029 sodium carbonate Inorganic materials 0.000 description 1
229910052979 sodium sulfide 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
239000011343 solid material Substances 0.000 description 1
238000010561 standard procedure Methods 0.000 description 1
239000010959 steel Substances 0.000 description 1
DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 1

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/73—After-treatment of removed components
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
- C01D5/145—Pyrosulfites or metabisulfites

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Organic Chemistry (AREA)
Chemical Kinetics & Catalysis (AREA)
Oil, Petroleum & Natural Gas (AREA)
Analytical Chemistry (AREA)
General Chemical & Material Sciences (AREA)
Inorganic Chemistry (AREA)
Materials Engineering (AREA)
Health & Medical Sciences (AREA)
Environmental & Geological Engineering (AREA)
Biomedical Technology (AREA)
Treating Waste Gases (AREA)
External Artificial Organs (AREA)
Removal Of Specific Substances (AREA)
Detergent Compositions (AREA)
Treatment Of Water By Ion Exchange (AREA)

NO20001137A 2000-03-06 2000-03-06 Fremgangsmåte for å fjerne natriumsulfat fra en fosfatlösning NO312131B1 (no)

Priority Applications (13)

Application Number	Priority Date	Filing Date	Title
NO20001137A NO312131B1 (no)	2000-03-06	2000-03-06	Fremgangsmåte for å fjerne natriumsulfat fra en fosfatlösning
EP01914246A EP1265692B1 (de)	2000-03-06	2001-03-02	Verfahren zur reinigung wässriger pufferlösungen
BRPI0109015-1A BR0109015B1 (pt)	2000-03-06	2001-03-02	processo para purificar solução tampão de fosfato de sódio utilizada para absorção de dióxido de enxofre de gases de combustão.
ES01914246T ES2211782T3 (es)	2000-03-06	2001-03-02	Procedimiento para purificar soluciones tampon acuosas.
CA002402057A CA2402057C (en)	2000-03-06	2001-03-02	Process for purifying aqueous buffer solutions
AU2001239591A AU2001239591A1 (en)	2000-03-06	2001-03-02	Process for purifying aqueous buffer solutions
AT01914246T ATE254950T1 (de)	2000-03-06	2001-03-02	Verfahren zur reinigung wässriger pufferlösungen
PCT/NO2001/000084 WO2001066235A1 (en)	2000-03-06	2001-03-02	Process for purifying aqueous buffer solutions
JP2001564880A JP4464592B2 (ja)	2000-03-06	2001-03-02	水性緩衝溶液の精製方法
MXPA02008809A MXPA02008809A (es)	2000-03-06	2001-03-02	Proceso para purificar soluciones amortiguadores acuosas.
CNB01806177XA CN1199715C (zh)	2000-03-06	2001-03-02	净化含水缓冲溶液的方法
US10/220,691 US6960332B2 (en)	2000-03-06	2001-03-02	Process for purifying aqueous buffer solutions
DE60101321T DE60101321T2 (de)	2000-03-06	2001-03-02	Verfahren zur reinigung wässriger pufferlösungen

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NO20001137A NO312131B1 (no)	2000-03-06	2000-03-06	Fremgangsmåte for å fjerne natriumsulfat fra en fosfatlösning

Publications (3)

Publication Number	Publication Date
NO20001137D0 NO20001137D0 (no)	2000-03-06
NO20001137L NO20001137L (no)	2001-09-07
NO312131B1 true NO312131B1 (no)	2002-03-25

Family

ID=19910840

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO20001137A NO312131B1 (no)	2000-03-06	2000-03-06	Fremgangsmåte for å fjerne natriumsulfat fra en fosfatlösning

Country Status (13)

Country	Link
US (1)	US6960332B2 (de)
EP (1)	EP1265692B1 (de)
JP (1)	JP4464592B2 (de)
CN (1)	CN1199715C (de)
AT (1)	ATE254950T1 (de)
AU (1)	AU2001239591A1 (de)
BR (1)	BR0109015B1 (de)
CA (1)	CA2402057C (de)
DE (1)	DE60101321T2 (de)
ES (1)	ES2211782T3 (de)
MX (1)	MXPA02008809A (de)
NO (1)	NO312131B1 (de)
WO (1)	WO2001066235A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US8545754B2 (en)	2009-04-23	2013-10-01	Medtronic, Inc.	Radial design oxygenator with heat exchanger
MX2013004816A (es)	2010-10-29	2013-07-02	Mecs Inc	Recuperacion regenerativa de dioxido de azufre de gases efluentes.
WO2013011092A1 (en) *	2011-07-19	2013-01-24	Pureteq A/S	Method for removing impurities from flue gas condensate
CN102992289B (zh) *	2012-12-27	2014-09-17	广西明利化工有限公司	一种生产食品级磷酸的方法
US10589223B1 (en)	2019-04-18	2020-03-17	Saudi Arabian Oil Company	Method and apparatus for treating a sulfur dioxide containing stream by hydrogen sulfide in aqueous conditions
CN114367170B (zh) *	2021-12-13	2024-08-09	武钢资源集团有限公司	富集烟气中二氧化硫的方法
CN114272731B (zh) *	2022-01-10	2024-07-05	武钢资源集团乌龙泉矿业有限公司	一种烟气中二氧化硫回收与再利用的装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3911093A (en) *	1971-10-18	1975-10-07	Stauffer Chemical Co	Recovery of SO{HD 2 {B from waste gas emissions
NO155684C (no) *	1983-09-08	1987-05-13	Sintef	Fremgangsmaate for fjernelse av svoveldioksyd fra avgasser.
US4519994A (en) *	1984-02-27	1985-05-28	Stauffer Chemical Company	Process for absorption of SO2 into phosphate absorbent
DD252978A5 (de) *	1985-09-16	1988-01-06	K	Verfahren zur reinigung von schwefeldioxid enthaltenden gasen
NO164218C (no) *	1988-02-24	1990-09-12	Sintef	Fremgangsmaate for rensing av vandige bufferloesninger.
US5785888A (en) *	1995-03-24	1998-07-28	Milmac Operating Company	Method for removal of sulfur dioxide

2000
- 2000-03-06 NO NO20001137A patent/NO312131B1/no not_active IP Right Cessation
2001
- 2001-03-02 AT AT01914246T patent/ATE254950T1/de not_active IP Right Cessation
- 2001-03-02 JP JP2001564880A patent/JP4464592B2/ja not_active Expired - Fee Related
- 2001-03-02 DE DE60101321T patent/DE60101321T2/de not_active Expired - Lifetime
- 2001-03-02 EP EP01914246A patent/EP1265692B1/de not_active Expired - Lifetime
- 2001-03-02 MX MXPA02008809A patent/MXPA02008809A/es active IP Right Grant
- 2001-03-02 WO PCT/NO2001/000084 patent/WO2001066235A1/en not_active Ceased
- 2001-03-02 ES ES01914246T patent/ES2211782T3/es not_active Expired - Lifetime
- 2001-03-02 BR BRPI0109015-1A patent/BR0109015B1/pt not_active IP Right Cessation
- 2001-03-02 CA CA002402057A patent/CA2402057C/en not_active Expired - Fee Related
- 2001-03-02 US US10/220,691 patent/US6960332B2/en not_active Expired - Fee Related
- 2001-03-02 AU AU2001239591A patent/AU2001239591A1/en not_active Abandoned
- 2001-03-02 CN CNB01806177XA patent/CN1199715C/zh not_active Expired - Fee Related

Also Published As

Publication number	Publication date
CN1199715C (zh)	2005-05-04
JP4464592B2 (ja)	2010-05-19
NO20001137L (no)	2001-09-07
CA2402057A1 (en)	2001-09-13
US6960332B2 (en)	2005-11-01
US20030106852A1 (en)	2003-06-12
EP1265692A1 (de)	2002-12-18
CN1416360A (zh)	2003-05-07
DE60101321T2 (de)	2004-09-09
BR0109015A (pt)	2007-05-29
CA2402057C (en)	2008-07-29
MXPA02008809A (es)	2004-10-15
BR0109015B1 (pt)	2010-06-15
ES2211782T3 (es)	2004-07-16
EP1265692B1 (de)	2003-11-26
AU2001239591A1 (en)	2001-09-17
ATE254950T1 (de)	2003-12-15
JP2003525735A (ja)	2003-09-02
DE60101321D1 (de)	2004-01-08
NO20001137D0 (no)	2000-03-06
WO2001066235A1 (en)	2001-09-13

Legal Events

Date	Code	Title	Description
2011-10-24	MM1K	Lapsed by not paying the annual fees

Publication	Publication Date	Title
US3653812A (en)	1972-04-04	Process for removal of sulfur dioxide from gas streams
CA1071382A (en)	1980-02-12	Method of removing fly ash particulates from flue gases in a closed-loop wet scrubbing system
US3944649A (en)	1976-03-16	Multistage process for removing sulfur dioxide from stack gases
NO792783L (no)	1980-03-03	Fremgangsmaate og apparatur for minskning av mengden av ineffektive kjemikalier i kokevaeske
NO143492B (no)	1980-11-17	Fremgangsmaate for rensing av en alkalisk natriumkarbonatholdig og eventuelt ogsaa oksalatholdig opploesning erholdt ved bayer-oppslutning av bauxitt
NO312131B1 (no)	2002-03-25	Fremgangsmåte for å fjerne natriumsulfat fra en fosfatlösning
NO864573L (no)	1987-05-19	Fremgangsmaate til aa fjerne svoveldioksyd fra gass-stroemmer
US4093508A (en)	1978-06-06	Process for recovering chemicals from the waste liquors of sulfate cellulose digestion and the waste waters of bleaching
JP3066403B2 (ja)	2000-07-17	煙道ガスからの二酸化イオウ除去方法
US2841561A (en)	1958-07-01	Recovery of chemicals from smelt solutions
EP0002880B1 (de)	1982-04-21	Regenerierung einer Absorptionslösung
US3886069A (en)	1975-05-27	Process for purification of aqueous sodium citrate solutions
US5108625A (en)	1992-04-28	Process for removing sodium sulfate from aqueous buffer solutions
FI67244B (fi)	1984-10-31	Foerfarande foer utstoetning av klorider
US4559212A (en)	1985-12-17	Process for purifying gases containing sulphur dioxide
NO762084L (de)	1976-12-20
SU1303040A3 (ru)	1987-04-07	Способ извлечени химических веществ из содержащего хлориды зеленого щелока
US4364918A (en)	1982-12-21	Separation of thiosulfate from Stretford solution
JP3727366B2 (ja)	2005-12-14	二酸化硫黄を含むガスを浄化するための方法及び装置
NO147939B (no)	1983-04-05	Fremgangsmaate for fjerning av svoveldioksyd fra gasser
NO982685L (no)	1998-12-14	FremgangsmÕte og innretning for gjenvinning av svovelforbindelser fra r°kgass
SU1720689A1 (ru)	1992-03-23	Способ очистки коксового газа от сероводорода
SU867883A1 (ru)	1981-09-30	Способ переработки сточных вод
CA1075859A (en)	1980-04-22	Process for recovering chemicals from the waste liquors of sulfate cellulose digestion and the waste waters of bleaching
NO130723B (de)	1974-10-21