MA21979A1 - Procede pour l'eloignement des metaux lourds de l'acide phosphorique . - Google Patents
Procede pour l'eloignement des metaux lourds de l'acide phosphorique .Info
- Publication number
- MA21979A1 MA21979A1 MA22248A MA22248A MA21979A1 MA 21979 A1 MA21979 A1 MA 21979A1 MA 22248 A MA22248 A MA 22248A MA 22248 A MA22248 A MA 22248A MA 21979 A1 MA21979 A1 MA 21979A1
- Authority
- MA
- Morocco
- Prior art keywords
- removal
- phosphoric acid
- heavy metals
- metals
- heavy
- Prior art date
Links
Classifications
-
- 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
- C01B25/18—Phosphoric acid
- C01B25/234—Purification; Stabilisation; Concentration
- C01B25/237—Selective elimination of impurities
- C01B25/238—Cationic impurities, e.g. arsenic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Extraction Or Liquid Replacement (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI894965A FI83863C (fi) | 1989-10-18 | 1989-10-18 | Foerfarande foer avlaegsning av tungmetaller fraon fosforsyra. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MA21979A1 true MA21979A1 (fr) | 1991-07-01 |
Family
ID=8529187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MA22248A MA21979A1 (fr) | 1989-10-18 | 1990-10-16 | Procede pour l'eloignement des metaux lourds de l'acide phosphorique . |
Country Status (3)
| Country | Link |
|---|---|
| FI (1) | FI83863C (fi) |
| MA (1) | MA21979A1 (fi) |
| NL (1) | NL9002270A (fi) |
-
1989
- 1989-10-18 FI FI894965A patent/FI83863C/fi not_active IP Right Cessation
-
1990
- 1990-10-16 MA MA22248A patent/MA21979A1/fr unknown
- 1990-10-18 NL NL9002270A patent/NL9002270A/nl not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FI83863B (fi) | 1991-05-31 |
| FI83863C (fi) | 1991-09-10 |
| FI894965A0 (fi) | 1989-10-18 |
| NL9002270A (nl) | 1991-05-16 |
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