PL14539B1 - A method of separating acid components of end gases, which are formed during the production of pyrophosphates. - Google Patents
A method of separating acid components of end gases, which are formed during the production of pyrophosphates. Download PDFInfo
- Publication number
- PL14539B1 PL14539B1 PL14539A PL1453929A PL14539B1 PL 14539 B1 PL14539 B1 PL 14539B1 PL 14539 A PL14539 A PL 14539A PL 1453929 A PL1453929 A PL 1453929A PL 14539 B1 PL14539 B1 PL 14539B1
- Authority
- PL
- Poland
- Prior art keywords
- pyrophosphates
- production
- gases
- sulfuric acid
- acid components
- Prior art date
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- 239000007789 gas Substances 0.000 title claims description 11
- 239000002253 acid Substances 0.000 title claims description 6
- 235000011180 diphosphates Nutrition 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title claims 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 4
- CSABAZBYIWDIDE-UHFFFAOYSA-N sulfino hydrogen sulfite Chemical class OS(=O)OS(O)=O CSABAZBYIWDIDE-UHFFFAOYSA-N 0.000 claims description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 2
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical class [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 claims description 2
- 235000019252 potassium sulphite Nutrition 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims 1
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 150000003839 salts Chemical group 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 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
- 239000003795 chemical substances by application Substances 0.000 description 1
- HAHLURFXZPKIQK-UHFFFAOYSA-N diazanium;sulfinato sulfite Chemical compound [NH4+].[NH4+].[O-]S(=O)OS([O-])=O HAHLURFXZPKIQK-UHFFFAOYSA-N 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 150000003112 potassium compounds Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Description
Znany jest sposób oddzielnego otrzy¬ mywania kwasnych skladników gazów kon¬ cowych, tworzacych sie przy wyrobie py¬ rofosforanów, polegajacy na tern, ze gazy uwalnia sie od zwiazków fluorowych i chlorowodoru przez traktowanie woda, przyczem otrzymuje sie gaz koncowy, który zawiera juz tylko kwas siarkawy.Stezenie kwasu siarkawego w tych prze¬ mytych gazach jest rozmaite i zalezne od skladu soli, sluzacej za srodek do trakto¬ wania fosforanów, oraz od zawartosci w niej siarczanów. Moze sie tedy zdarzyc, ze gazy beda tak rozcienczone, iz nie bedzie mozna przerobic ich racjonalnie na kwas siarkowy.Stwierdzono, ze mimo to owe gazy mozna wykorzystac, a mianowicie, usuwa¬ jac z nich kwas siarkawy w stanie gazo¬ wym w postaci dwusiarczynów lub siar¬ czynów potasowcowych i rozkladajac na¬ stepnie dwusiarczyny odpowiedniemi kwa¬ sami. Otrzymuje sie przytem kwas siarka¬ wy w bardzo stezonej postaci, dzieki cze¬ mu mozna go dalej przerobic w zupelnie dowolny sposób w pewnych warunkach równiez na skroplony kwas siarkawy.Okazalo sie, ze korzystnie jest naj¬ pierw kwas siarkawy w stanie gazowym zwiazac z amonjakiem, przyczem otrzy¬ muje sie siarczyn lub dwusiarczyn amono¬ wy oddzielnie lub w mieszaninie. Siarczy¬ ny amonowe rozklada sie nastepnie kwa¬ sem siarkowym, przyczem powstaje siar-czan amonowy, a kwas siarkawy zostaje uwolniony w stezonej postaci i ulega dal¬ szej prsseróbce* *''¦''¦¦.-1 -¦' Mozna oczywiscie równiez otrzymywac bardzo stezony kwas siarkawy wedlug uprzednio opisanego sposobu, traktujac fosforany wylacznie siarczanami.Przyklad. Gazy odlotowe, powstajace przy traktowaniu pyrofosforanów, z za¬ stosowaniem odpadkowych soli przemyslu potasowego, jako zwiazków potasowco- wych, i zawierajace 5 objetosciowych % HCl i 1 objetosciowy % S02 myje sie woda celem usuniecia kwasu solnego i zwiazków fluorowych. Przemyte gazy u- walnia sie nastepnie od zawartego w nich S02 w wiezach, zraszanych lugami siar¬ czynu amonowego. Lug, splywajacy z wiez, sklada sie z mieszaniny siarczynu a- monowego i dwusiarczynu amonowego.Przeprowadza sie go zapomoca amonjaku w siarczyn amonowy, który sie stosuje znów do absorbcji. Czesc lugu co pewien czas usuwa sie z procesu i rozklada kwa¬ sem siarkowym, przyczem otrzymuje sie kwas siarkawy w bardzo stezonej postaci. PLIt is known to separately obtain the acid components of the end gases formed in the pyrophosphate product, whereby gases are released from fluorine compounds and hydrogen chloride by treating with water, and a final gas is obtained, which now contains only acid sulfurous. The sulfuric acid concentration in these scrubbed gases varies and depends on the composition of the salt, which serves as the phosphate treatment agent, and on its sulfate content. It may therefore happen that the gases are so diluted that they cannot reasonably be converted into sulfuric acid. It has been found that these gases can still be used, namely, to remove gaseous sulfuric acid from them in the form of disulphites or potassium sulphites and gradually decomposing the disulphites with the corresponding acids. In addition, sulfuric acid is obtained in a very concentrated form, thanks to which it can be further processed in any way, under certain conditions, also into condensed sulfurous acid. It has turned out that it is preferable to first bind the sulfuric acid in the gas state to ammonia. whereby the ammonium sulphite or disulphite is obtained separately or in a mixture. The ammonium sulphites are then decomposed with sulfuric acid, whereby ammonium sulphate is formed and the sulphurous acid is released in a concentrated form and is further processed.-1 -¦ 'Of course, also obtain highly concentrated sulfuric acid according to the previously described method, treating phosphates only with sulphates. The waste gases, resulting from the treatment of pyrophosphates, using waste salts of the potassium industry as potassium compounds, and containing 5% by volume HCl and 1% by volume SO 2, are washed with water to remove hydrochloric acid and fluorine compounds. The washed gases are then released from the SO 2 contained therein in towers, sprayed with ammonium sulphite seams. The lug that flows down the towers consists of a mixture of ammonium sulphite and ammonium disulphite. It is converted into ammonium sulphite with ammonium sulphite and used again for absorption. Part of the slurry is periodically removed from the process and decomposed with sulfuric acid, thereby obtaining sulfuric acid in a very concentrated form. PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL14539B1 true PL14539B1 (en) | 1931-10-31 |
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