GB1370534A - Method for the production of phosphoric acid - Google Patents
Method for the production of phosphoric acidInfo
- Publication number
- GB1370534A GB1370534A GB479572A GB479572A GB1370534A GB 1370534 A GB1370534 A GB 1370534A GB 479572 A GB479572 A GB 479572A GB 479572 A GB479572 A GB 479572A GB 1370534 A GB1370534 A GB 1370534A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphoric acid
- concen
- temp
- acid
- mixture
- 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)
- Paper (AREA)
Abstract
1370534 Phosphoric acid production B G ZOTOV S K VOSKRESENSKY V A KONONOV S D EVENCHIK E N ZHUCHKOV D K NIKITINA N R BRODOVSKY V S KUNIN E P MASLOV N I TEREKHOV N A KOVALEVA and A K KISELEV 2 Feb 1972 4795/72 Heading C1A H3PO4 is prepared by mixing H3PO4 of 18-48% P2O5 by wt. concen. with H2SO4 of 75-98% by wt. concen. at a temp. of 95- 150‹ C. for 2-60 min., the wt. ratio of the acids being 1À5-3À5 : 1, and then digesting Ca-containing phosphate raw material, e.g. apatite, with the acid mixture at 65-100‹ C., the H2SO4 being present in amount corresponding to 90-105% by wt. of the amount necessary to convert all the Ca into CaSO4.2H2O or alpha-CaSO4.¢H2O, the resulting precipitate of CaSO4 being filtered from the product phosphoric acid; the precipitate being washed with water and the washings and some of the phosphoric being combined to give a liquor having a 18-48% P2O5 concen. and recycled to the acid mixing step. Steam may be introduced into the acid mixing step, the mixture being maintained at a temp. of 95-100‹ C. for 0À5-5 min. to remove SiF4 and then at a temp. of 100-150‹ C. to remove HF. Silica may also be added to the mixture in an amount of 20-100 kg/ton of product phosphoric acid calculated as P2O5.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722204109 DE2204109C3 (en) | 1972-01-28 | Process for the production of phosphoric acid | |
| GB479572A GB1370534A (en) | 1972-01-28 | 1972-02-02 | Method for the production of phosphoric acid |
| FR7205977A FR2172804B1 (en) | 1972-01-28 | 1972-02-22 |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722204109 DE2204109C3 (en) | 1972-01-28 | Process for the production of phosphoric acid | |
| GB479572A GB1370534A (en) | 1972-01-28 | 1972-02-02 | Method for the production of phosphoric acid |
| FR7205977A FR2172804B1 (en) | 1972-01-28 | 1972-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1370534A true GB1370534A (en) | 1974-10-16 |
Family
ID=27184068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB479572A Expired GB1370534A (en) | 1972-01-28 | 1972-02-02 | Method for the production of phosphoric acid |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2172804B1 (en) |
| GB (1) | GB1370534A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4321244A (en) | 1979-09-07 | 1982-03-23 | Groupement Franco-Senagalais D'etudes Et De Recherches Industrielles | Process for the treatment of a calcium aluminophosphate |
| EP0274177A2 (en) * | 1986-12-08 | 1988-07-13 | MITSUI TOATSU CHEMICALS, Inc. | Process for the production of highly concentrated phosphoric acid |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2064833A (en) * | 1932-03-30 | 1936-12-22 | Dorr Co Inc | Cooling of liquids |
| NL77970C (en) * | 1949-06-18 | |||
| DE1027647B (en) * | 1955-02-16 | 1958-04-10 | Nordengren & Co Ab | Process for the production of phosphoric acid |
| US3193351A (en) * | 1961-07-05 | 1965-07-06 | Nat Distillers Chem Corp | Removal of fluorine from wet process prosphoric acid |
| GB1227802A (en) * | 1967-07-07 | 1971-04-07 |
-
1972
- 1972-02-02 GB GB479572A patent/GB1370534A/en not_active Expired
- 1972-02-22 FR FR7205977A patent/FR2172804B1/fr not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4321244A (en) | 1979-09-07 | 1982-03-23 | Groupement Franco-Senagalais D'etudes Et De Recherches Industrielles | Process for the treatment of a calcium aluminophosphate |
| EP0274177A2 (en) * | 1986-12-08 | 1988-07-13 | MITSUI TOATSU CHEMICALS, Inc. | Process for the production of highly concentrated phosphoric acid |
| 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 |
|---|---|
| FR2172804B1 (en) | 1976-07-09 |
| DE2204109B2 (en) | 1975-08-28 |
| DE2204109A1 (en) | 1973-08-02 |
| FR2172804A1 (en) | 1973-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |