ZA875147B - Process for the removal of heavy from acid,phosphate-containing,aqueous media - Google Patents
Process for the removal of heavy from acid,phosphate-containing,aqueous mediaInfo
- Publication number
- ZA875147B ZA875147B ZA875147A ZA875147A ZA875147B ZA 875147 B ZA875147 B ZA 875147B ZA 875147 A ZA875147 A ZA 875147A ZA 875147 A ZA875147 A ZA 875147A ZA 875147 B ZA875147 B ZA 875147B
- Authority
- ZA
- South Africa
- Prior art keywords
- phosphate
- removal
- acid
- heavy
- aqueous media
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
-
- 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
- C01B25/226—Hemihydrate 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
- C01B25/22—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
- C01B25/228—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 one form of calcium sulfate being formed and then converted to another form
- C01B25/229—Hemihydrate-dihydrate process
- C01B25/2295—Hemihydrate-dihydrate process the conversion being performed in one or more vessels different from those used for reaction after separation of phosphoric acid
-
- 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
-
- 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
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/24—Organic substances containing heavy metals
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/43—Inorganic substances containing heavy metals, in the bonded or free state
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Geology (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Toxicology (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Emergency Management (AREA)
- Removal Of Specific Substances (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8601846A NL8601846A (nl) | 1986-07-15 | 1986-07-15 | Werkwijze voor het verwijderen van zware metalen uit zure fosfaathoudende waterige media. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA875147B true ZA875147B (en) | 1988-03-30 |
Family
ID=19848319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA875147A ZA875147B (en) | 1986-07-15 | 1987-07-14 | Process for the removal of heavy from acid,phosphate-containing,aqueous media |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4822582A (fr) |
| EP (1) | EP0253454B1 (fr) |
| AT (1) | ATE58358T1 (fr) |
| CA (1) | CA1327113C (fr) |
| DE (1) | DE3766173D1 (fr) |
| ES (1) | ES2019372B3 (fr) |
| FI (1) | FI82827C (fr) |
| GR (1) | GR3001466T3 (fr) |
| IL (1) | IL83181A (fr) |
| MA (1) | MA21033A1 (fr) |
| NL (1) | NL8601846A (fr) |
| TN (1) | TNSN87088A1 (fr) |
| ZA (1) | ZA875147B (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2649391B1 (fr) * | 1989-07-04 | 1991-10-31 | Pierre Becker | Procede de traitement de l'acide phosphorique pour en eliminer certains metaux lourds |
| FR2652076B1 (fr) * | 1989-09-20 | 1992-03-20 | Rhone Poulenc Chimie | Procede de recuperation des valeurs de terres rares dans les gypses. |
| US5102556A (en) * | 1990-03-30 | 1992-04-07 | Union Oil Company Of California | Method for rendering ferric hydroxide sludges recyclable |
| TNSN92119A1 (fr) * | 1992-02-07 | 1993-06-08 | Ct D Etudes Et De Rech S Des Phosphates Mineraux Cerphos | Procede de fabrication d'acide phosphorique marchand a tres basse teneur en cadmium |
| WO2008113403A1 (fr) * | 2007-03-06 | 2008-09-25 | Centre D'etudes Et De Recherches Des Phosphates Mineraux | Procede de traitement de solides cadmiferes |
| WO2014027348A1 (fr) * | 2012-08-16 | 2014-02-20 | Rotem Amfert Negev Ltd. | Procédé de fabrication d'acide phosphorique à teneur en cadmium réduite |
| FR3117476B1 (fr) | 2020-12-10 | 2023-04-21 | Ocp Sa | Procede integre de decadmiation d’acide phosphorique |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1601208A (en) * | 1921-02-03 | 1926-09-28 | Fed Phosphorus Co | Process of purifying phosphoric acid |
| US2081351A (en) * | 1934-09-13 | 1937-05-25 | Monsanto Chemicals | Process for the treatment of phosphoric acid |
| DE2218382C3 (de) * | 1972-04-15 | 1975-08-21 | Gebrueder Giulini Gmbh, 6700 Ludwigshafen | Verfahren zur Herstellung von reinem Calciumsulfat beim Phosphorsäurenaßaufschluß |
| SE418845B (sv) * | 1979-05-10 | 1981-06-29 | Boliden Ab | Forfarande for rening av vatprocessfosforsyra |
| JPS5933526B2 (ja) * | 1980-07-28 | 1984-08-16 | セントラル硝子株式会社 | ウラン含有量の多い湿式リン酸の製造方法 |
| US4388292A (en) * | 1981-12-14 | 1983-06-14 | United States Gypsum Company | Process for reducing radioactive contamination in phosphogypsum |
-
1986
- 1986-07-15 NL NL8601846A patent/NL8601846A/nl not_active Application Discontinuation
-
1987
- 1987-07-02 US US07/069,512 patent/US4822582A/en not_active Expired - Fee Related
- 1987-07-13 CA CA000541862A patent/CA1327113C/fr not_active Expired - Fee Related
- 1987-07-13 MA MA21270A patent/MA21033A1/fr unknown
- 1987-07-14 IL IL83181A patent/IL83181A/xx not_active IP Right Cessation
- 1987-07-14 ES ES87201356T patent/ES2019372B3/es not_active Expired - Lifetime
- 1987-07-14 FI FI873107A patent/FI82827C/fi not_active IP Right Cessation
- 1987-07-14 EP EP87201356A patent/EP0253454B1/fr not_active Expired - Lifetime
- 1987-07-14 ZA ZA875147A patent/ZA875147B/xx unknown
- 1987-07-14 AT AT87201356T patent/ATE58358T1/de not_active IP Right Cessation
- 1987-07-14 DE DE8787201356T patent/DE3766173D1/de not_active Expired - Lifetime
- 1987-07-15 TN TNTNSN87088A patent/TNSN87088A1/fr unknown
-
1991
- 1991-02-11 GR GR91400176T patent/GR3001466T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL8601846A (nl) | 1988-02-01 |
| GR3001466T3 (en) | 1992-10-08 |
| ES2019372B3 (es) | 1991-06-16 |
| FI873107A (fi) | 1988-01-16 |
| IL83181A (en) | 1991-04-15 |
| EP0253454B1 (fr) | 1990-11-14 |
| EP0253454A1 (fr) | 1988-01-20 |
| ATE58358T1 (de) | 1990-11-15 |
| MA21033A1 (fr) | 1988-04-01 |
| CA1327113C (fr) | 1994-02-22 |
| IL83181A0 (en) | 1987-12-31 |
| FI82827C (fi) | 1991-04-25 |
| TNSN87088A1 (fr) | 1990-01-01 |
| US4822582A (en) | 1989-04-18 |
| DE3766173D1 (de) | 1990-12-20 |
| FI873107A0 (fi) | 1987-07-14 |
| FI82827B (fi) | 1991-01-15 |
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