ES330957A1 - A continuous procedure for the preparation of phosphoric acid and plaster. (Machine-translation by Google Translate, not legally binding) - Google Patents
A continuous procedure for the preparation of phosphoric acid and plaster. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES330957A1 ES330957A1 ES0330957A ES330957A ES330957A1 ES 330957 A1 ES330957 A1 ES 330957A1 ES 0330957 A ES0330957 A ES 0330957A ES 330957 A ES330957 A ES 330957A ES 330957 A1 ES330957 A1 ES 330957A1
- Authority
- ES
- Spain
- Prior art keywords
- crystals
- phosphoric acid
- hemihydrate
- calcium sulfate
- solution
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A continuous process for the preparation of phosphoric acid and gypsum by acidulating mineral phosphate with sulfuric acid or with a mixture of phosphoric acid and sulfuric acid to form a suspension of crystals of calcium sulfate hemihydrate in a concentrated solution of phosphoric acid, separating the crystals of hemihydrate of said phosphoric acid solution and removing said phosphoric acid solution and converting the crystals of calcium sulfate hemihydrate into crystals of calcium sulfate dihydrate (gypsum), characterized by washing the crystals of calcium sulfate hemihydrate after the separation of the concentrated phosphoric acid solution with an aqueous washing liquid in order to separate at least part of the phosphoric acid which has remained in, and is adhered to, the mass of the hemihydrate crystals, the composition and the amount of said washing liquid and the temperature so that it was Completely or substantially complete the transformation of the hemihydrate into another crystalline form and that is made to the liquid that remains in, and is adhered to, the mass of hemihydrate crystals after washing, an appropriate component for the recrystallization solution to which it is transferred said mass, and by recrystallizing the washed crystals of calcium sulfate hemihydrate to form gypsum crystals in an aqueous solution containing from 0 to 20% by weight of phosphoric acid, calculated as P2O5, and from 2 to 25% by weight of H2SO4, and separate the gypsum crystals obtained from the recrystallization solution. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38480/65A GB1162514A (en) | 1965-09-08 | 1965-09-08 | Process for the preparation of Phosphoric Acid and Gypsum from Phosphate Rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES330957A1 true ES330957A1 (en) | 1967-09-16 |
Family
ID=10403731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0330957A Expired ES330957A1 (en) | 1965-09-08 | 1966-09-07 | A continuous procedure for the preparation of phosphoric acid and plaster. (Machine-translation by Google Translate, not legally binding) |
Country Status (13)
| Country | Link |
|---|---|
| AT (1) | AT285526B (en) |
| BE (1) | BE686573A (en) |
| DE (1) | DE1542611C3 (en) |
| DK (1) | DK138941B (en) |
| ES (1) | ES330957A1 (en) |
| FI (1) | FI44589B (en) |
| GB (1) | GB1162514A (en) |
| IL (1) | IL26394A (en) |
| NL (1) | NL153151B (en) |
| NO (1) | NO116160B (en) |
| OA (1) | OA02139A (en) |
| SE (1) | SE315575C (en) |
| SU (1) | SU389657A3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3653826A (en) * | 1967-09-21 | 1972-04-04 | Nissan Chemical Ind Ltd | Process for the production of phosphoric acid at a high concentration and a gypsum by-product of improved quality |
| DE60208207T2 (en) | 2001-08-24 | 2006-08-17 | Purac Biochem B.V. | PROCESS FOR THE PREPARATION OF MILKY ACID AND CALCIUM SULPHATE DIHYDRATE |
| US6632966B2 (en) | 2001-08-24 | 2003-10-14 | Purac Biochem B.V. | Method for the preparation of lactic acid and calcium sulphate dihydrate |
| RU2599525C1 (en) * | 2015-04-23 | 2016-10-10 | Открытое акционерное общество "Научно-исследовательский институт по удобрениям и инсектофунгицидам имени профессора Я.В. Самойлова" (ОАО "НИУИФ") | Method of producing wet-process phosphoric acid |
| CN111732086A (en) * | 2020-07-31 | 2020-10-02 | 天宝动物营养科技股份有限公司 | Process for preparing phosphoric acid and co-producing high-purity gypsum by semi-water-dihydrate method |
| CN116768171B (en) * | 2023-06-28 | 2024-07-02 | 昆明川金诺化工股份有限公司 | Process for producing high-quality semi-aqueous wet-process phosphoric acid |
-
1965
- 1965-09-08 GB GB38480/65A patent/GB1162514A/en not_active Expired
-
1966
- 1966-08-28 IL IL26394A patent/IL26394A/en unknown
- 1966-08-29 NL NL666612150A patent/NL153151B/en not_active IP Right Cessation
- 1966-09-02 FI FI2298/66A patent/FI44589B/fi active
- 1966-09-05 DE DE1542611A patent/DE1542611C3/en not_active Expired
- 1966-09-07 NO NO164589A patent/NO116160B/no unknown
- 1966-09-07 DK DK460166AA patent/DK138941B/en unknown
- 1966-09-07 ES ES0330957A patent/ES330957A1/en not_active Expired
- 1966-09-07 AT AT844766A patent/AT285526B/en not_active IP Right Cessation
- 1966-09-07 BE BE686573D patent/BE686573A/xx not_active IP Right Cessation
- 1966-09-07 SU SU1101994A patent/SU389657A3/ru active
- 1966-09-08 SE SE6612066A patent/SE315575C/xx unknown
- 1966-09-12 OA OA52594A patent/OA02139A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO116160B (en) | 1969-02-10 |
| OA02139A (en) | 1970-05-05 |
| DK138941C (en) | 1979-05-07 |
| NL6612150A (en) | 1967-03-09 |
| DK138941B (en) | 1978-11-20 |
| FI44589B (en) | 1971-08-31 |
| SE315575B (en) | 1969-10-06 |
| DE1542611A1 (en) | 1970-04-09 |
| SE315575C (en) | 1975-10-20 |
| SU389657A3 (en) | 1973-07-05 |
| IL26394A (en) | 1970-02-19 |
| DE1542611B2 (en) | 1974-06-27 |
| BE686573A (en) | 1967-03-07 |
| DE1542611C3 (en) | 1978-05-11 |
| AT285526B (en) | 1970-10-27 |
| GB1162514A (en) | 1969-08-27 |
| NL153151B (en) | 1977-05-16 |
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