UST932002I4 - Purification of wet-process phosphoric acid with methanol ahd ammohia - Google Patents
Purification of wet-process phosphoric acid with methanol ahd ammohia Download PDFInfo
- Publication number
- UST932002I4 UST932002I4 US40610373A UST932002I4 US T932002 I4 UST932002 I4 US T932002I4 US 40610373 A US40610373 A US 40610373A US T932002 I4 UST932002 I4 US T932002I4
- Authority
- US
- United States
- Prior art keywords
- methanol
- percent
- phosphoric acid
- impurities
- acid
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
IMPROVED PROCESS FOR PARTIAL PURIFICATION OF MERCHANTGRADE WET-PROCESS PHOSPHORIC ACID WITH CO-PRODUCTION OF IMPURE PHOSPHORIC ACID OR SOLID FERTILIZER MATERIALS CONTAINING FORM 50 TO 95 PERCENT OF THE IMPURITIES ORGINALLY PRESENT IN THE CRUDE ACID. CRUDE ACID IS TREATED WITH FROM 2.5 TO 4.2 POUNDS OF METHANOL PER POUND OF P2O5 AND WITH FROM 0.26 TO 0.4 EQUIVALENTS OF A SOLUBLE AMMONIUM COMPOUND PER MOLE OF P2O5 TO PRECIPITATE MOST OF THE METALLIC AND FLUORINE IMPURITIES AND 7 TO 14 PERCENT OF THE P2O5 AS SOLID AMMONIUM METALIC PHOSPHATES AND FLOURIDE COMPOUNDS. THE REACTION MIXTURE IS MAINTAINED AT TEMPERATURES FORM 35*C. TO ITS BOILING POINT (ABOUT 70*C.) FOR 15 TO 90 MINUTES TO FORM SLURIES THAT FILTER AND SETTLE RAPIDLY. THE SOLIDS ARE SEPARATED FORM THE REACTION MIXTURE AND METHANOL IS DISTILLED FROM THE RESULTING CLARIFIED SOLUTION TO FORM CONCENTRATED PARTIALLY PURIFIED ACID. THE SOLID AMMONIUM METALLIC PHOSPHATES CONTAIN FROM 44 TO 54 PERCENT P2O5, ALL OF WHICH IS AVAILABLE,AND ABOUT 50 PERCENT IS WATER SOLUBLE BY AOAC PROCEDURES. ALTERNATELY, THE REACTION SLURRY IS SEPARATED INTO A CLARIFIED LIQUID FRACTION AND A SETTLED SLURRY FRACTION. METHANOL IS DISTILLED FROM THE SETTLED FRACTION, WHICH CAUSES MOST OF THE IMPURITIES TO REDISSOLVE, YIELDING IMPURE PHOSPHORIC ACID.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05406103 UST932002I4 (en) | 1973-10-12 | 1973-10-12 | Purification of wet-process phosphoric acid with methanol ahd ammohia |
| US05/473,947 US3975178A (en) | 1973-10-12 | 1974-05-28 | Purification of wet-process phosphoric acid with methanol and ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05406103 UST932002I4 (en) | 1973-10-12 | 1973-10-12 | Purification of wet-process phosphoric acid with methanol ahd ammohia |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/473,947 Continuation US3975178A (en) | 1973-10-12 | 1974-05-28 | Purification of wet-process phosphoric acid with methanol and ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST932002I4 true UST932002I4 (en) | 1975-03-04 |
Family
ID=23606550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05406103 Pending UST932002I4 (en) | 1973-10-12 | 1973-10-12 | Purification of wet-process phosphoric acid with methanol ahd ammohia |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST932002I4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4064220A (en) | 1972-08-30 | 1977-12-20 | Imi (Tami) Institute For Research And Development | Removal of dissolved organic matter from acidic aqueous solution |
-
1973
- 1973-10-12 US US05406103 patent/UST932002I4/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4064220A (en) | 1972-08-30 | 1977-12-20 | Imi (Tami) Institute For Research And Development | Removal of dissolved organic matter from acidic aqueous solution |
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