FR2171861A1 - Phosphoric acid prodn - with wet screening of digester product - Google Patents
Phosphoric acid prodn - with wet screening of digester productInfo
- Publication number
- FR2171861A1 FR2171861A1 FR7204638A FR7204638A FR2171861A1 FR 2171861 A1 FR2171861 A1 FR 2171861A1 FR 7204638 A FR7204638 A FR 7204638A FR 7204638 A FR7204638 A FR 7204638A FR 2171861 A1 FR2171861 A1 FR 2171861A1
- Authority
- FR
- France
- Prior art keywords
- screening
- crystallisn
- phosphoric acid
- appts
- liq
- 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.)
- Granted
Links
- 238000012216 screening Methods 0.000 title abstract 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title abstract 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 title 1
- 238000000034 method Methods 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 238000000184 acid digestion Methods 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 238000005054 agglomeration Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 229910052925 anhydrite Inorganic materials 0.000 abstract 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000002367 phosphate rock Substances 0.000 abstract 1
- 235000011007 phosphoric acid Nutrition 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
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
- C01B25/228—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
- C01B25/231—Dihydrate-hemihydrate process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/20—Vibrating the filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/28—Strainers not provided for elsewhere
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7204638A FR2171861A1 (en) | 1972-02-11 | 1972-02-11 | Phosphoric acid prodn - with wet screening of digester product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7204638A FR2171861A1 (en) | 1972-02-11 | 1972-02-11 | Phosphoric acid prodn - with wet screening of digester product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2171861A1 true FR2171861A1 (en) | 1973-09-28 |
| FR2171861B1 FR2171861B1 (enrdf_load_stackoverflow) | 1976-07-23 |
Family
ID=9093363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7204638A Granted FR2171861A1 (en) | 1972-02-11 | 1972-02-11 | Phosphoric acid prodn - with wet screening of digester product |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2171861A1 (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0274177A3 (en) * | 1986-12-08 | 1989-07-26 | Mitsui Toatsu Chemicals Inc. | Process for the production of highly concentrated phosphoric acid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3124530A (en) * | 1964-03-10 | Filter | ||
| FR1485940A (fr) * | 1965-07-07 | 1967-06-23 | Prayon | Procédé pour la fabrication d'acide phosphorique et de sulfate de calcium hémihydrate par voie humide |
| FR1498272A (fr) * | 1965-12-14 | 1967-10-20 | Kuhlmann Ets | Procédé de fabrication continue et directe par voie humide, d'acide phosphorique concentré |
| GB1113922A (en) * | 1964-08-19 | 1968-05-15 | Fisons Ltd | Clarifying phosphoric acid |
| FR1534672A (fr) * | 1964-03-06 | 1968-08-02 | Procédé de fabrication de l'acide phosphorique |
-
1972
- 1972-02-11 FR FR7204638A patent/FR2171861A1/fr active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3124530A (en) * | 1964-03-10 | Filter | ||
| FR1534672A (fr) * | 1964-03-06 | 1968-08-02 | Procédé de fabrication de l'acide phosphorique | |
| GB1113922A (en) * | 1964-08-19 | 1968-05-15 | Fisons Ltd | Clarifying phosphoric acid |
| FR1485940A (fr) * | 1965-07-07 | 1967-06-23 | Prayon | Procédé pour la fabrication d'acide phosphorique et de sulfate de calcium hémihydrate par voie humide |
| FR1498272A (fr) * | 1965-12-14 | 1967-10-20 | Kuhlmann Ets | Procédé de fabrication continue et directe par voie humide, d'acide phosphorique concentré |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0274177A3 (en) * | 1986-12-08 | 1989-07-26 | Mitsui Toatsu Chemicals Inc. | Process for the production of highly concentrated phosphoric acid |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2171861B1 (enrdf_load_stackoverflow) | 1976-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |