PL67905B1 - - Google Patents

Info

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

1966-06-25

Links

• Espacenet
• Global Dossier
• Discuss

• NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 62
• 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 16
• 238000000034 method Methods 0.000 claims description 16
• 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
• 238000005755 formation reaction Methods 0.000 claims description 2
• 235000019796 monopotassium phosphate Nutrition 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
• AQSJGOWTSHOLKH-UHFFFAOYSA-N Phosphite Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 claims 1
• 150000003016 phosphoric acids Chemical class 0.000 claims 1
• 235000021317 phosphate Nutrition 0.000 description 10
• NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 8
• 239000002253 acid Substances 0.000 description 8
• 238000006243 chemical reaction Methods 0.000 description 8
• 239000010452 phosphate Substances 0.000 description 8
• 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
• VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 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
• 230000005712 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
• 229940095564 Anhydrous Calcium Sulfate Drugs 0.000 description 1
• 235000019749 Dry matter Nutrition 0.000 description 1
• 229910052925 anhydrite Inorganic materials 0.000 description 1
• 239000004568 cement Substances 0.000 description 1
• 230000001276 controlling effect Effects 0.000 description 1
• 238000001816 cooling Methods 0.000 description 1
• 230000000875 corresponding Effects 0.000 description 1
• 230000001419 dependent 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
• 230000000694 effects Effects 0.000 description 1
• 230000005713 exacerbation Effects 0.000 description 1
• 238000000605 extraction Methods 0.000 description 1
• 230000002349 favourable 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
• 230000003068 static Effects 0.000 description 1
• -1 sulfuric acid ions Chemical class 0.000 description 1
• 235000011149 sulphuric acid Nutrition 0.000 description 1