PL92069B1 - - Google Patents
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- PL92069B1 PL92069B1 PL17599474A PL17599474A PL92069B1 PL 92069 B1 PL92069 B1 PL 92069B1 PL 17599474 A PL17599474 A PL 17599474A PL 17599474 A PL17599474 A PL 17599474A PL 92069 B1 PL92069 B1 PL 92069B1
- Authority
- PL
- Poland
- Prior art keywords
- cyanide
- water
- hydrogen cyanide
- gases
- soluble
- Prior art date
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- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 14
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 5
- 238000006386 neutralization reaction Methods 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 239000011686 zinc sulphate Substances 0.000 claims description 4
- 235000009529 zinc sulphate Nutrition 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 150000002825 nitriles Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 2
- 150000003751 zinc Chemical class 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229960001763 zinc sulfate Drugs 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- -1 alkali metal cyanides Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulfur dioxide Inorganic materials O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 239000001166 ammonium sulphate Substances 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- GTLDTDOJJJZVBW-UHFFFAOYSA-N zinc cyanide Chemical compound [Zn+2].N#[C-].N#[C-] GTLDTDOJJJZVBW-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Description
Przedmiotem wynalazku jest sposób oczyszczania gazów odlotowych z cyjanowodoru i rozpuszczalnych w wodzie cyjankpw, w którym rozpuszczalne cyjanki lub cyjanowodór wiaze sie w postac nierozpuszczalna.The present invention relates to a method of purifying waste gases from hydrogen cyanide and soluble gases in water cyanide in which soluble cyanide or hydrogen cyanide is bound to an insoluble form.
Dotychczasowe metody oczyszczania gazów z cyjanowodoru i cyjanków polegaly na stosowaniu chemosorpcji za pomoca roztworu lugu potasowego. W czasie mokrego oczyszczania jednoczesnie z wiazaniom cyjanowodoru nastepowalo wiazanie zawartego w powietrzu dwutlenku wegla. Produkty chemosorpcji zawierajace cyjanek potasowy kierowane byly do oczyszczalni scieków, gdzie poddawane byly utlenieniu za pomoca chloru lub podchlorynu wapniowego. Stosowane metody oczyszczania wymagaly stosunkowo wysokich stezen cyjanowodoru, obecnosci siarkowodoru, siarki oraz dwutlenku wegla. W przypadku braku tych skladników lub niskich stezen metody oczyszczania mialy ograniczona stosowalnosc. Znany jest równiez sposób usuwania amoniaku, siarkowodoru i cyjanowodoru z gazów zawierajacych te zwiazki, w którym poprzez wymywanie roztworem siarczanu zelazawego, amoniak neutralizuje sie do siarczanu amonu, cjanowodór do cjanku zelazawego, zas siarkowodór do siarczku zelazawego, który utlenia sie nastepnie do wolnej siarki przy uzyciu tlenu.The methods used to purify gases from hydrogen cyanide and cyanides to date have been based on application chemosorption with a potassium lug solution. Simultaneously with setting during wet cleaning Hydrogen cyanide binds the carbon dioxide in the air. Chemosorption products containing potassium cyanide were directed to the sewage treatment plant, where they were oxidized by with the help of chlorine or calcium hypochlorite. The purification methods used required relatively high levels the concentration of hydrogen cyanide, the presence of hydrogen sulfide, sulfur and carbon dioxide. In the absence of these Ingredients or low concentration treatment methods have had limited applicability. The way is also known removal of ammonia, hydrogen sulfide and hydrogen cyanide from gases containing these compounds, in which by elution with a solution of ferrous sulphate, ammonia is neutralized to ammonium sulphate, hydrogen cyanide to ferrous cyanide, and hydrogen sulphide to ferrous sulphide, which then oxidizes to free sulfur at using oxygen.
Wytyczono sobie zadanie rozwiazania sposobu oczyszczania gazów z cyjanowodoru, w którym proces mozna by prowadzic bez wzgledu na wysokosc stezen, obecnosc siarki i dwutlenku wegla.The task of solving the method of purifying gases from hydrogen cyanide in which the process could be carried out regardless of the concentration level, the presence of sulfur and carbon dioxide.
Zadanie rozwiazuje sposób wedlug wynalazku, w którym koncowy filtrat z roztworu utlenia sie chlorem w obecnosci lugu potasowego, a gazy odlotowe z cyjanowodorem i rozpuszczalnymi w wodzie cyjankami traktuje sie roztworem neutralizujacym zawierajacym 1 czesc wagowa siarczanu cynku oraz 20-1000 czesci wagowych wody w temperaturze od 0—80°C, przy czym proces neutralizacji odbywa sie przy nadmiarze soli cynkowej od 20-100%.The problem is solved by the method according to the invention in which the final filtrate of the solution is oxidized with chlorine in the presence of potassium liquor, and waste gases with hydrogen cyanide and water-soluble cyanides treated with a neutralizing solution containing 1 part by weight of zinc sulphate and 20-1000 parts by weight of water at a temperature of 0-80 ° C, the neutralization process taking place with an excess of salt zinc from 20-100%.
Istote wynalazku blizej ilustruje przyklad wykonania. 10000 m3/h powietrza o temperaturze 20°C zawiera okolo 10 g/m3 zanieczyszczen cyjanowych, w postaci cyjanku sodu. Proces oczyszczania prowadzi sie przy2 92 069 pomocy siarczanu cynku, a stezenie neutralizacyjne wynosi 3 g/i przy objetosci roztworu w pluczce 2,5 m3.The essence of the invention is illustrated in an example of embodiment. 10,000 m3 / h of air at 20 ° C contains about 10 g / m3 of cyanic impurities, in the form of sodium cyanide. The purification process is carried out at 2 92 069 with zinc sulphate, and the neutralization concentration is 3 g / i with a solution volume in the flush of 2.5 m3.
Zgodnie z reakcja na 100 y cyjanku sodu zuzywa sie 160 g siarczanu cynku, a w czasie godziny przeplywa przez urzadzenie oczyszczajace 10 g cyjanku sodu. Zuzycie siarczanu cynku dla neutralizowania cyjanku sodu wyniesie 16 g. Przebieg procesu nastepuje wedlug reakcji 2 NaCN -!• ZnS04 = Zn/CN/2 + Na2S04. W cehi zapewnienia doskonalej skutecznosci i unikniecia desorpcji cyjanków z roztworu i wtórnej emisji do atmosfery nalezy zapewnic nadmiar reagenta, nadmiar ten winien wynosic okolo 100% przy temperaturach wyzszych niz 50°C i okolo 20?4 przy temperaturze do 50°C.According to the reaction for 100 [mu] l of sodium cyanide, 160 g of zinc sulfate are consumed, and in an hour it flows through purification device 10 g of sodium cyanide. The consumption of zinc sulfate for neutralizing sodium cyanide will be 16 g. The course of the process follows the reaction 2 NaCN -! • ZnSO4 = Zn / CN / 2 + Na2SO4. To ensure that excellent efficiency and avoidance of cyanide desorption from solution and secondary emission to the atmosphere ensure an excess of reagent, this excess should be about 100% at temperatures higher than 50 ° C and about 20-4 at temperatures up to 50 ° C.
Dla stosowania sposobu wedlug wynalazku w przypadku szczególnym, neutralizacji be? obecnosci tlenu i cyjanków metali alkalicznych, mozna by stosowac siarczan zelazawy ostajac skutek identyczny jak przy uzyciu siarczanu cynku. Natomiast w przypadku obecnosci tlenu i cyjanków metali alkalicznych metoda nie odniesie skutku, gdyz powstaja rozpuszczalne zwiazki komponentów typu zeiazicjanków lub zelazocjanków metali alkalicznych trudne do usuniecia z roztworu.For the application of the method according to the invention in the particular case of neutralization, the presence of oxygen and alkali metal cyanides, ferrous sulphate could be used with the same effect as with using zinc sulfate. However, in the presence of oxygen and alkali metal cyanides, the method is not will be effective because soluble compounds of the components of the zeiazitian or iron-like compounds are formed alkali metals difficult to remove from solution.
W wyniku zastosowania sposobu wedlug wynalazku neutralizacja cyjanowodoru w mokrym urzadzeniu absorpcyjnym powstaje zawiesina cyjanku cynkowego nierozpuszczalnego zwlaszcza w obecnosci nadmiaru soli cynkowej, która utlenia sie w sciekach przy uzyciu chloru po uprzednim zadaniu scieków lugiem potasowym. k\ac 120+i8 Cena 45 clAs a result of the method according to the invention, neutralization of hydrogen cyanide in the wet apparatus by absorption, a suspension of zinc cyanide, insoluble, especially in the presence of excess salt, is formed zinc oxide, which is oxidized in the sewage with the use of chlorine after the sewage has been treated with potassium slurry. k \ ac 120 + i8 Price 45 cl
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL17599474A PL92069B1 (en) | 1974-11-27 | 1974-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL17599474A PL92069B1 (en) | 1974-11-27 | 1974-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL92069B1 true PL92069B1 (en) | 1977-03-31 |
Family
ID=19969837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL17599474A PL92069B1 (en) | 1974-11-27 | 1974-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL92069B1 (en) |
-
1974
- 1974-11-27 PL PL17599474A patent/PL92069B1/pl unknown
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