NO133030B - - Google Patents
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- Publication number
- NO133030B NO133030B NO95972A NO95972A NO133030B NO 133030 B NO133030 B NO 133030B NO 95972 A NO95972 A NO 95972A NO 95972 A NO95972 A NO 95972A NO 133030 B NO133030 B NO 133030B
- Authority
- NO
- Norway
- Prior art keywords
- reaction zone
- sulfuric acid
- phosphate
- filter
- gypsum
- Prior art date
Links
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 98
- 238000000034 method Methods 0.000 claims description 45
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 40
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 34
- 238000005406 washing Methods 0.000 claims description 32
- 239000007791 liquid phase Substances 0.000 claims description 27
- 238000001914 filtration Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000010802 sludge Substances 0.000 claims description 22
- 239000007787 solid Substances 0.000 claims description 21
- 235000011132 calcium sulphate Nutrition 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 17
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000000706 filtrate Substances 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000001175 calcium sulphate Substances 0.000 claims description 8
- 239000001506 calcium phosphate Substances 0.000 claims description 5
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 5
- 235000011010 calcium phosphates Nutrition 0.000 claims description 5
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims 1
- 229910019142 PO4 Inorganic materials 0.000 description 49
- 235000021317 phosphate Nutrition 0.000 description 49
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 46
- 239000010452 phosphate Substances 0.000 description 46
- 229910052602 gypsum Inorganic materials 0.000 description 44
- 239000010440 gypsum Substances 0.000 description 44
- 239000002002 slurry Substances 0.000 description 24
- 238000001953 recrystallisation Methods 0.000 description 14
- 229940095672 calcium sulfate Drugs 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- 241000838698 Togo Species 0.000 description 9
- 239000012065 filter cake Substances 0.000 description 5
- 239000011505 plaster Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 229910052925 anhydrite Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000004683 dihydrates Chemical class 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 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 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940057306 hemihydrate calcium sulfate Drugs 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 229910052585 phosphate mineral Inorganic materials 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Removal Of Specific Substances (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7110132A FR2130848A5 (it) | 1971-03-23 | 1971-03-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO133030B true NO133030B (it) | 1975-11-17 |
| NO133030C NO133030C (it) | 1976-02-25 |
Family
ID=9073983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO95972A NO133030C (it) | 1971-03-23 | 1972-03-22 |
Country Status (12)
| Country | Link |
|---|---|
| BE (1) | BE781083A (it) |
| BR (1) | BR7201640D0 (it) |
| CA (1) | CA981417A (it) |
| ES (1) | ES401081A1 (it) |
| FR (1) | FR2130848A5 (it) |
| GB (1) | GB1381345A (it) |
| IE (1) | IE36182B1 (it) |
| IT (1) | IT953939B (it) |
| NL (1) | NL172640C (it) |
| NO (1) | NO133030C (it) |
| SE (1) | SE364495B (it) |
| YU (1) | YU73672A (it) |
-
1971
- 1971-03-23 FR FR7110132A patent/FR2130848A5/fr not_active Expired
-
1972
- 1972-03-03 IT IT6768772A patent/IT953939B/it active
- 1972-03-09 NL NL7203142A patent/NL172640C/xx not_active IP Right Cessation
- 1972-03-20 SE SE357472A patent/SE364495B/xx unknown
- 1972-03-21 BR BR164072A patent/BR7201640D0/pt unknown
- 1972-03-21 YU YU73672A patent/YU73672A/xx unknown
- 1972-03-22 GB GB1341972A patent/GB1381345A/en not_active Expired
- 1972-03-22 BE BE781083A patent/BE781083A/xx not_active IP Right Cessation
- 1972-03-22 CA CA137,825A patent/CA981417A/en not_active Expired
- 1972-03-22 NO NO95972A patent/NO133030C/no unknown
- 1972-03-22 ES ES401081A patent/ES401081A1/es not_active Expired
-
1973
- 1973-03-20 IE IE35073A patent/IE36182B1/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT953939B (it) | 1973-08-10 |
| NL172640C (nl) | 1983-10-03 |
| BE781083A (fr) | 1972-09-22 |
| NL172640B (nl) | 1983-05-02 |
| SE364495B (it) | 1974-02-25 |
| NL7203142A (it) | 1972-09-26 |
| ES401081A1 (es) | 1975-02-16 |
| DE2213710A1 (de) | 1972-09-28 |
| DE2213710B2 (de) | 1975-07-24 |
| YU73672A (en) | 1982-02-28 |
| IE36182B1 (en) | 1976-09-01 |
| BR7201640D0 (pt) | 1973-05-24 |
| CA981417A (en) | 1976-01-13 |
| GB1381345A (en) | 1975-01-22 |
| NO133030C (it) | 1976-02-25 |
| FR2130848A5 (it) | 1972-11-10 |
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