PL67905B1 - - Google Patents
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- Publication number
- PL67905B1 PL67905B1 PL115306A PL11530666A PL67905B1 PL 67905 B1 PL67905 B1 PL 67905B1 PL 115306 A PL115306 A PL 115306A PL 11530666 A PL11530666 A PL 11530666A PL 67905 B1 PL67905 B1 PL 67905B1
- Authority
- PL
- Poland
- Prior art keywords
- gypsum
- phosphoric acid
- sludge
- hemihydrate
- recrystallization
- Prior art date
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 62
- 238000000034 method Methods 0.000 claims description 39
- 239000010440 gypsum Substances 0.000 claims description 35
- 229910052602 gypsum Inorganic materials 0.000 claims description 35
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 32
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 31
- 239000010802 sludge Substances 0.000 claims description 24
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 18
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 15
- 238000001953 recrystallisation Methods 0.000 claims description 14
- 230000029087 digestion Effects 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 235000011132 calcium sulphate Nutrition 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 239000001175 calcium sulphate Substances 0.000 claims description 4
- 239000002367 phosphate rock Substances 0.000 claims description 4
- 238000002425 crystallisation Methods 0.000 claims description 3
- 150000004683 dihydrates Chemical class 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 235000011007 phosphoric acid Nutrition 0.000 claims 5
- 150000003016 phosphoric acids Chemical class 0.000 claims 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical class OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims 1
- 229910019142 PO4 Inorganic materials 0.000 description 10
- 235000021317 phosphate Nutrition 0.000 description 10
- 239000002253 acid Substances 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 8
- 239000010452 phosphate Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229940095672 calcium sulfate Drugs 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 229940095564 anhydrous calcium sulfate Drugs 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- -1 sulfuric acid ions Chemical class 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL67905B1 true PL67905B1 (enrdf_load_stackoverflow) | 1972-12-30 |
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