CA1115483A - Preparation of monocalcium phosphate and phosphoric acid - Google Patents
Preparation of monocalcium phosphate and phosphoric acidInfo
- Publication number
- CA1115483A CA1115483A CA326,914A CA326914A CA1115483A CA 1115483 A CA1115483 A CA 1115483A CA 326914 A CA326914 A CA 326914A CA 1115483 A CA1115483 A CA 1115483A
- Authority
- CA
- Canada
- Prior art keywords
- phosphoric acid
- phosphate
- solution
- monocalcium phosphate
- potassium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 234
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 106
- 239000001506 calcium phosphate Substances 0.000 title claims abstract description 63
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 title claims abstract description 60
- 229910000150 monocalcium phosphate Inorganic materials 0.000 title claims abstract description 60
- 235000019691 monocalcium phosphate Nutrition 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 43
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 239000002367 phosphate rock Substances 0.000 claims abstract description 31
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 27
- 239000010440 gypsum Substances 0.000 claims abstract description 22
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 21
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 229910020440 K2SiF6 Inorganic materials 0.000 claims abstract description 15
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910001414 potassium ion Inorganic materials 0.000 claims abstract description 15
- 229910052939 potassium sulfate Inorganic materials 0.000 claims abstract description 15
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims abstract description 14
- 235000011151 potassium sulphates Nutrition 0.000 claims abstract description 13
- 239000003337 fertilizer Substances 0.000 claims abstract description 11
- 229910000343 potassium bisulfate Inorganic materials 0.000 claims abstract description 11
- 235000011007 phosphoric acid Nutrition 0.000 claims description 120
- 239000007787 solid Substances 0.000 claims description 29
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 28
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 21
- 239000011591 potassium Substances 0.000 claims description 21
- 229910052700 potassium Inorganic materials 0.000 claims description 21
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 claims description 21
- 239000007836 KH2PO4 Substances 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims description 12
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 10
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 239000002562 thickening agent Substances 0.000 claims description 10
- 230000007062 hydrolysis Effects 0.000 claims description 9
- CHKVPAROMQMJNQ-UHFFFAOYSA-M potassium bisulfate Chemical compound [K+].OS([O-])(=O)=O CHKVPAROMQMJNQ-UHFFFAOYSA-M 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000012736 aqueous medium Substances 0.000 claims description 3
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 239000012265 solid product Substances 0.000 claims 1
- 150000002222 fluorine compounds Chemical class 0.000 abstract description 25
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract description 11
- 239000011435 rock Substances 0.000 abstract description 9
- JTNCEQNHURODLX-UHFFFAOYSA-N 2-phenylethanimidamide Chemical compound NC(=N)CC1=CC=CC=C1 JTNCEQNHURODLX-UHFFFAOYSA-N 0.000 abstract description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 abstract 2
- 229910000160 potassium phosphate Inorganic materials 0.000 abstract 1
- 235000011009 potassium phosphates Nutrition 0.000 abstract 1
- 229960004838 phosphoric acid Drugs 0.000 description 83
- 239000000243 solution Substances 0.000 description 51
- 239000000047 product Substances 0.000 description 38
- 235000007686 potassium Nutrition 0.000 description 19
- 229960003975 potassium Drugs 0.000 description 19
- 239000002253 acid Substances 0.000 description 13
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 8
- 229910019142 PO4 Inorganic materials 0.000 description 8
- ZHZFKLKREFECML-UHFFFAOYSA-L calcium;sulfate;hydrate Chemical compound O.[Ca+2].[O-]S([O-])(=O)=O ZHZFKLKREFECML-UHFFFAOYSA-L 0.000 description 7
- 229910052681 coesite Inorganic materials 0.000 description 7
- 229910052906 cristobalite Inorganic materials 0.000 description 7
- 235000021317 phosphate Nutrition 0.000 description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 7
- 239000010452 phosphate Substances 0.000 description 7
- 229910052682 stishovite Inorganic materials 0.000 description 7
- 229910052905 tridymite Inorganic materials 0.000 description 7
- 239000011575 calcium Substances 0.000 description 6
- 235000001465 calcium Nutrition 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- 229960005069 calcium Drugs 0.000 description 6
- 229940095626 calcium fluoride Drugs 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 239000011737 fluorine Substances 0.000 description 5
- 229910052731 fluorine Inorganic materials 0.000 description 5
- 239000000376 reactant Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 229910000318 alkali metal phosphate Inorganic materials 0.000 description 3
- 235000011010 calcium phosphates Nutrition 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000006115 defluorination reaction Methods 0.000 description 3
- 239000010436 fluorite Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 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 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000005696 Diammonium phosphate Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 2
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 2
- 235000019838 diammonium phosphate Nutrition 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000012432 intermediate storage Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 239000012066 reaction slurry Substances 0.000 description 2
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910003638 H2SiF6 Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 239000006012 monoammonium phosphate Substances 0.000 description 1
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229960001866 silicon dioxide Drugs 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- ZEFWRWWINDLIIV-UHFFFAOYSA-N tetrafluorosilane;dihydrofluoride Chemical compound F.F.F[Si](F)(F)F ZEFWRWWINDLIIV-UHFFFAOYSA-N 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
- C01F11/20—Halides
- C01F11/22—Fluorides
-
- 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
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
- C01B25/225—Dihydrate process
-
- 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
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
- C01B25/328—Defluorination during or after the preparation
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
- C05B11/10—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using orthophosphoric acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fertilizers (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Removal Of Specific Substances (AREA)
- Silicon Compounds (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US930,147 | 1978-08-02 | ||
| US05/930,147 US4160657A (en) | 1978-01-19 | 1978-08-02 | Preparation of monocalcium phosphate and phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1115483A true CA1115483A (en) | 1982-01-05 |
Family
ID=25458980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA326,914A Expired CA1115483A (en) | 1978-08-02 | 1979-05-04 | Preparation of monocalcium phosphate and phosphoric acid |
Country Status (13)
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586530B2 (ja) * | 1976-09-06 | 1983-02-04 | ライオン株式会社 | 複合エマルジヨン |
| JPS58143831A (ja) * | 1982-02-22 | 1983-08-26 | Taihoo Kogyo Kk | Ｗ／ｏ／ｗ複合エマルジヨン |
| JPS6016546A (ja) * | 1983-07-07 | 1985-01-28 | Meiji Milk Prod Co Ltd | ホイップ用クリーム |
| JPS6016542A (ja) * | 1983-07-07 | 1985-01-28 | Meiji Milk Prod Co Ltd | コーヒークリーム |
| JPS60102137A (ja) * | 1983-07-08 | 1985-06-06 | Meiji Milk Prod Co Ltd | 合成乳及び合成濃縮乳 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2218382C3 (de) * | 1972-04-15 | 1975-08-21 | Gebrueder Giulini Gmbh, 6700 Ludwigshafen | Verfahren zur Herstellung von reinem Calciumsulfat beim Phosphorsäurenaßaufschluß |
| IL48207A (en) * | 1974-10-07 | 1978-12-17 | Pennzoil Co | Production of fluoride-free phosphates |
| US4055626A (en) * | 1976-06-15 | 1977-10-25 | Pennzoil Company | Method of producing fluoride-free phosphoric acid |
-
1979
- 1979-05-04 CA CA326,914A patent/CA1115483A/en not_active Expired
- 1979-05-08 ZA ZA792199A patent/ZA792199B/xx unknown
- 1979-05-14 FR FR7912214A patent/FR2432477A1/fr active Granted
- 1979-05-14 ES ES480523A patent/ES480523A1/es not_active Expired
- 1979-05-16 IL IL57301A patent/IL57301A/xx unknown
- 1979-05-17 BR BR7903045A patent/BR7903045A/pt unknown
- 1979-05-17 BE BE0/195218A patent/BE876325A/xx not_active IP Right Cessation
- 1979-05-17 GB GB7917161A patent/GB2026996B/en not_active Expired
- 1979-05-18 MA MA18633A patent/MA18439A1/fr unknown
- 1979-05-19 IN IN522/CAL/79A patent/IN150442B/en unknown
- 1979-05-21 JP JP54062556A patent/JPS5827207B2/ja not_active Expired
- 1979-06-01 IT IT12625/79A patent/IT1194869B/it active
- 1979-07-30 DE DE19792930825 patent/DE2930825A1/de active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5523087A (en) | 1980-02-19 |
| FR2432477B1 (enrdf_load_stackoverflow) | 1984-05-11 |
| IN150442B (enrdf_load_stackoverflow) | 1982-10-09 |
| BE876325A (fr) | 1979-11-19 |
| ZA792199B (en) | 1980-05-28 |
| DE2930825C2 (enrdf_load_stackoverflow) | 1988-01-07 |
| ES480523A1 (es) | 1980-01-16 |
| IT7912625A0 (it) | 1979-06-01 |
| GB2026996A (en) | 1980-02-13 |
| DE2930825A1 (de) | 1980-02-21 |
| GB2026996B (en) | 1982-09-02 |
| FR2432477A1 (fr) | 1980-02-29 |
| IL57301A (en) | 1982-07-30 |
| IT1194869B (it) | 1988-09-28 |
| MA18439A1 (fr) | 1979-12-31 |
| JPS5827207B2 (ja) | 1983-06-08 |
| BR7903045A (pt) | 1980-03-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |