PL143567B1 - Method of oxidating hydroquinone in alkaline aqueous solutions during desulfurization of gases - Google Patents
Method of oxidating hydroquinone in alkaline aqueous solutions during desulfurization of gases Download PDFInfo
- Publication number
- PL143567B1 PL143567B1 PL25234885A PL25234885A PL143567B1 PL 143567 B1 PL143567 B1 PL 143567B1 PL 25234885 A PL25234885 A PL 25234885A PL 25234885 A PL25234885 A PL 25234885A PL 143567 B1 PL143567 B1 PL 143567B1
- Authority
- PL
- Poland
- Prior art keywords
- hydroquinone
- oxidation
- alkaline aqueous
- sodium
- aqueous solutions
- Prior art date
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- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 title claims description 34
- 239000007789 gas Substances 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 10
- 239000007864 aqueous solution Substances 0.000 title claims description 8
- 238000006477 desulfuration reaction Methods 0.000 title claims description 6
- 230000023556 desulfurization Effects 0.000 title claims description 6
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 20
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 8
- 239000013522 chelant Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 229910001882 dioxygen Inorganic materials 0.000 claims description 5
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 5
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 150000002506 iron compounds Chemical class 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- OOIOHEBTXPTBBE-UHFFFAOYSA-N [Na].[Fe] Chemical compound [Na].[Fe] OOIOHEBTXPTBBE-UHFFFAOYSA-N 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- -1 sulfide ions Chemical class 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur 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
- RZCACQDLQNEHPW-UHFFFAOYSA-N [Fe].[Fe].[Na] Chemical compound [Fe].[Fe].[Na] RZCACQDLQNEHPW-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
- Industrial Gases (AREA)
Description
Przedmiotem wynalazku jest sposób utleniania hydrochinonu w alkalicznych roztworach wodnych podczas odsiarczania gazu. Znajduje on zastosowanie przy odsiarczaniu gazu weglowego i koksowniczego.Dotychczas znany sposób utleniania hydrochinonu w alkalicznych roztworach wodnych podczas odsiarczania gazu polega na tym, ze zawarty w roztworze chinon utlenia wystepujacy w gazie siarkowodór do siarki elementarnej, a nastepnie zredukowanajego postac utlenia sie ponow¬ nie do chinonu tlenem molekularnym zawartym w powietrzu. Czas potrzebny do przebiegu reakcji utleniania chinonu wynosi 30 do 60 minut - Dlugi czas utleniania hydrochinonu powoduje wzrost gabarytów instalacji do odsiarczania gazu oraz zwiekszenie ilosci cyrkulacyjnego roztworu alkalicznego, a przez kontakt jonów siarcz¬ kowych z tlenem zwieksza sie równiez ilosc powstajacych scieków gazowniczych.Sposób wedlug wynalazku polegajacy na utlenianiu wystepujacego w gazie siarkowodoru do siarki elementarnej przez chinon znajdujacy sie w alkalicznym roztworze wodnym i utlenianiu hydrochinonu do chinonu tlenem molekularnym zawartym w powietrzu, charakteryzuje sie tym, ze proces utleniania hydrochinonu w roztworze o pH 6,5 do 9,0 prowadzi sie w obecnosci katalizatora w postaci soli chelatowych zwiazków zelaza w ilosci 0,05 do 0,54% wagowych oraz w obecnosci tiosiarczanu sodu, siarczanu sodu, rodanku sodu, samych lub w mieszaninie w ilosci 0,07 do 20% wagowych. Jako sól chelatowa zwiazków zelaza stosuje sie sól sodowozelazowa kwasu etylenodwu- aminoczterooctowego.Nowe rozwiazanie przyczynia sie do przyspieszenia reakcji utleniania hydrochinonu, która zwieksza zdolnosc sorpcyjna roztworu w stosunku do jonu siarkowego, a tym samym podwyzsza sprawnosc odsiarczania gazu.Chinon zawarty w alkalicznym roztworze wodnym utlenia wystepujacy w gazie siarkowodór do siarki elementarnej, a nastepnie hydrochinon utlenia sie do chinonu tlenem molekularnym zawartym w powietrzu. Do wodnego alkalicznego roztworu zawierajacego hydrochinon o pH 8,8 dodaje sie jako katalizator sól sodowozelazowa kwasu etylenodwuaminoczterooctowego w ilosci^ 2 143 567 0,3% wagowych. Ponadto do roztworu dodaje sie równiez tiosiarczan sodu i rodanek sodu w ilosci 14% wagowych. W wyniku utleniania hydrochinonu uzyskano stopien odsiarczania gazu wynosza¬ cego 72% przy czasie reakcji 25 minut. .W innym przykladzie wykonania do wodnego alkalicznego roztworu zawierajacego hydro¬ chinon dodaje sie sól sodowozelazowa oraz siarczan sodu lub rodanek sodu.Zastrzezenia patentowe ' 1. Sposób utleniania hydrochinonu w alkalicznych roztworach wodnych podczas odsiarcza¬ nia gazu polegajacy na utlenianiu wystepujacego w gazie siarkowodoru do siarki elementarnej przez chinon znajdujacy .sie w alkalicznym roztworze wodnym i utlenianiu hydrochinonu do chinonu tlenem molekularnym zawartym w powietrzu, znamienny tym, ze proces utleniania hydrochinonu w roztworze o pH 6,5 do 9,0 prowadzi sie w obecnosci katalizatora w postaci soli chelatowych zwiazków zelaza w ilosci 0,05 do 0,54% wagowych oraz w obecnosci tiosiarczanu sodu, siarczanu sodu, rodanku sodu, samych lub w mieszaninie w ilosci 0,07 do 20% wagowych. 2. Sposób wedlug zastrz. 1, znamienny tym, ze jako sól chelatowa zwiazków zelaza stosuje sie sól sodowozelazowa kwasu etylenodwuaminoczterooctowego.Pricowni* PoHgnficzm U? PRL. Ntklid 100 egz.Cen* 220 zl PLThe present invention relates to a method of oxidizing hydroquinone in alkaline aqueous solutions during gas desulfurization. It is used in the desulphurization of coal and coke oven gas. The previously known method of oxidation of hydroquinone in alkaline aqueous solutions during gas desulphurization consists in the fact that the quinone contained in the solution oxidizes the hydrogen sulphide present in the gas to elemental sulfur, and then oxidizes it in its reduced form again to quinone with molecular oxygen in the air. The time needed for the reaction of quinone oxidation is 30 to 60 minutes - Long time of hydroquinone oxidation increases the size of the gas desulphurization system and increases the amount of alkaline circulating solution, and the contact of sulfide ions with oxygen also increases the amount of gaseous effluent. The invention, consisting in the oxidation of hydrogen sulfide present in gas to elemental sulfur by quinone in an alkaline aqueous solution and oxidation of hydroquinone to quinone with molecular oxygen contained in the air, is characterized by the fact that the process of oxidation of hydroquinone in solution with pH 6.5 to 9.0 leads to in the presence of a catalyst in the form of iron chelate salts in an amount of 0.05 to 0.54% by weight and in the presence of sodium thiosulfate, sodium sulfate, sodium hydroxide, alone or in a mixture in an amount of 0.07 to 20% by weight. As a chelate salt of iron compounds, the sodium iron salt of ethylenediaminetetraacetic acid is used. The new solution contributes to the acceleration of the hydroquinone oxidation reaction, which increases the sorption capacity of the solution in relation to the sulfur ion, and thus increases the efficiency of desulfurization of the gas in water. Hydrogen sulfide in the gas to elemental sulfur, and then the hydroquinone is oxidized to quinone with molecular oxygen contained in the air. The sodium iron salt of ethylenediaminetetraacetic acid in an amount of? 2,143,567 0.3% by weight is added as a catalyst to the aqueous alkaline solution containing hydroquinone at pH 8.8. In addition, sodium thiosulfate and sodium thiosulfate are also added to the solution in an amount of 14% by weight. The oxidation of the hydroquinone resulted in a degree of desulfurization of the gas of 72% with a reaction time of 25 minutes. In another embodiment, an aqueous alkaline solution containing hydroquinone is added sodium ferrous salt and sodium sulfate or sodium thiocyanate. Claims 1. A method of oxidizing hydroquinone in alkaline aqueous solutions during gas desulfurization by oxidizing the gas hydrogen sulfide to sulfur. elemental by quinone in an alkaline aqueous solution and oxidation of hydroquinone to quinone with molecular oxygen contained in the air, characterized in that the oxidation of hydroquinone in solution at pH 6.5 to 9.0 is carried out in the presence of a catalyst in the form of chelate salts of iron compounds in an amount of 0.05 to 0.54% by weight and in the presence of sodium thiosulfate, sodium sulfate, sodium hydroxide, alone or in a mixture in an amount of 0.07 to 20% by weight. 2. The method according to claim The method of claim 1, characterized in that the iron sodium iron salt of ethylenediaminetetraacetic acid is used as the chelate salt of iron compounds. Potownia * PoHgnficzm U? PRL. Ntklid 100 copies Price * PLN 220 PL
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL25234885A PL143567B1 (en) | 1985-03-11 | 1985-03-11 | Method of oxidating hydroquinone in alkaline aqueous solutions during desulfurization of gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL25234885A PL143567B1 (en) | 1985-03-11 | 1985-03-11 | Method of oxidating hydroquinone in alkaline aqueous solutions during desulfurization of gases |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL252348A1 PL252348A1 (en) | 1986-09-23 |
| PL143567B1 true PL143567B1 (en) | 1988-02-29 |
Family
ID=20025743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL25234885A PL143567B1 (en) | 1985-03-11 | 1985-03-11 | Method of oxidating hydroquinone in alkaline aqueous solutions during desulfurization of gases |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL143567B1 (en) |
-
1985
- 1985-03-11 PL PL25234885A patent/PL143567B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL252348A1 (en) | 1986-09-23 |
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