PL12902B1 - A method of recovering and simultaneously using sulfuric acid lost in the form of gypsum in the production of phosphoric acid from phosphates and sulfuric acid. - Google Patents
A method of recovering and simultaneously using sulfuric acid lost in the form of gypsum in the production of phosphoric acid from phosphates and sulfuric acid. Download PDFInfo
- Publication number
- PL12902B1 PL12902B1 PL12902A PL1290229A PL12902B1 PL 12902 B1 PL12902 B1 PL 12902B1 PL 12902 A PL12902 A PL 12902A PL 1290229 A PL1290229 A PL 1290229A PL 12902 B1 PL12902 B1 PL 12902B1
- Authority
- PL
- Poland
- Prior art keywords
- sulfuric acid
- gypsum
- phosphates
- production
- recovering
- Prior art date
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims description 26
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims description 16
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims description 8
- 239000010440 gypsum Substances 0.000 title claims description 8
- 229910052602 gypsum Inorganic materials 0.000 title claims description 8
- 229910019142 PO4 Inorganic materials 0.000 title claims description 6
- 235000021317 phosphate Nutrition 0.000 title claims description 6
- 150000003013 phosphoric acid derivatives Chemical class 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 4
- 239000004568 cement Substances 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims 1
- 238000006731 degradation reaction Methods 0.000 claims 1
- 239000001506 calcium phosphate Substances 0.000 description 2
- 235000011010 calcium phosphates Nutrition 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical class [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
Description
Przy wytwarzaniu kwasu fosforowego z fosforanów wapniowych i kwasu siarko¬ wego, kwas ten opada w postaci gipsu, któ¬ ry obecnie czestokroc [zostaje wyrzucany, jako produkt bezwartosciowy.Wykryto obecnie, ze wzmiankowany kwas siarkowy mozna odzyskac zpowro- tem w zamknietym obiegu kolowym w ten sposób, ze gips przerabia sie metodami znanemi na cement i kwas siarkowy, a o- trzymywany przytem kwas siarkowy zuzy- lwa sie jak zwykle, bezposrednio bez ja¬ kiegokolwiek oazysziazknia do dalszego przetwarzania fosforanów na kwas fosfo- irowy. Okazalo sie przytem, ze aczkolwiek \gips zawiera jeszcze nieznaczne ilosci kwasu fosforowego, otrzymuje sie wbrew oczekiwaniu cement zupelnie równowarty cementowi wytwarzanemu z materjalu, wolnego od kwasu fosforowego. Dzieki zu¬ zytkowaniu (gipsu i kwasu siarkowego w •sposób powyzszy, dotychczasowe wytwa¬ rzanie kwasu fosforowego z fosforanów i kwasu siarkowego, zostanie 'oczywiscie 'znacznie potanione.Przyklad. Fosforan wapnia miele sie i rozklada w sposób zwykly kwasem siarko¬ wym. Oddzielony od kwasu fosforowego gips przemywa sie nastepnie zapomoca de- kantaoji, susizy, miesza z materjalami za¬ wiera jacemi wegiel i gline i przerabia spo¬ sobami znanemi na cement. Uwalnianyprzytem kwas siarkowy zuzywa sie usta¬ wicznie do .rozkladu nowych ilosci fosfora¬ nów, wedlug Zwykle stosowanych w tym icelu metod pracy. PLIn the production of phosphoric acid from calcium phosphates and sulfuric acid, this acid collapses in the form of gypsum, which is now often thrown away as a worthless product. It has now been found that this sulfuric acid can be recovered in a closed cycle cycle in in this way, the gypsum is processed into cement and sulfuric acid by methods known in the art, and the sulfuric acid obtained therewith is used as usual, without any facilities for the further conversion of phosphates to phosphoric acid. It also turned out that although the gypsum still contains small amounts of phosphoric acid, the result is, contrary to expectations, a cement that is completely equivalent to cement made of a material free of phosphoric acid. By using (gypsum and sulfuric acid in the above manner, the production of phosphoric acid up to now from phosphates and sulfuric acid will of course be 'much cheaper'). Example: Calcium phosphate is ground and decomposed in the usual way with sulfuric acid. from phosphoric acid, the gypsum is then washed with decantation, dried, mixed with materials containing coal and clay, and processed in a manner known to be cement. The sulfuric acid released at the same time is regularly used up to a new amount of phosphates, according to the usual working methods for this purpose PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL12902B1 true PL12902B1 (en) | 1931-02-28 |
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