GB934436A - A new or improved process and apparatus for the production of ammonium phosphates - Google Patents
A new or improved process and apparatus for the production of ammonium phosphatesInfo
- Publication number
- GB934436A GB934436A GB1699859A GB1699859A GB934436A GB 934436 A GB934436 A GB 934436A GB 1699859 A GB1699859 A GB 1699859A GB 1699859 A GB1699859 A GB 1699859A GB 934436 A GB934436 A GB 934436A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gases
- still
- phosphoric acid
- reaction temperature
- ammoniacal liquor
- 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
- C01B25/26—Phosphates
- C01B25/28—Ammonium phosphates
-
- 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
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/40—Polyphosphates
- C01B25/405—Polyphosphates of ammonium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
In a process for producing ammonium phosphates, particularly di-ammonium phosphate, ammonia-containing vapours are distilled from ammoniacal liquor and passed at the reaction temperature (e.g. 65 DEG to 85 DEG C.) to a phosphoric acid bath maintained at the reaction temperature where ammonium phosphate crystals are produced and removed, and gases, air and water vapour are withdrawn from the bath, cooled to condense water, reheated to the reaction temperature and recycled to the phosphoric acid bath to evaporate excess water therefrom. Ammoniacal liquor (e.g. recovered from coal <PICT:0934436/III/1> carbonizing plants) is distilled in a still 1 (Fig. 1), the vapours are cooled to the reaction temperature in a dephlegmator 2, condensates being returned to the still 1, and passed into a phosphoric acid bath 3 (pH 5,0 to 6,5). The gases from bath 3 are partly cooled in a heat exchanger 5 by heat exchange with ammoniacal liquor being sent to still 1, further cooled in a cooler 6, condensates are removed, and a part of the gases are reheated at 8 and discharged into the phosphoric acid bath 3 through a spray ring 9. In modifications some gases are removed from the ammoniacal liquor before it enters the still, and the hot effluent from the still is used to reheat the recycled gases.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1699859A GB934436A (en) | 1959-05-19 | 1959-05-19 | A new or improved process and apparatus for the production of ammonium phosphates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1699859A GB934436A (en) | 1959-05-19 | 1959-05-19 | A new or improved process and apparatus for the production of ammonium phosphates |
Publications (1)
Publication Number | Publication Date |
---|---|
GB934436A true GB934436A (en) | 1963-08-21 |
Family
ID=10087393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1699859A Expired GB934436A (en) | 1959-05-19 | 1959-05-19 | A new or improved process and apparatus for the production of ammonium phosphates |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB934436A (en) |
-
1959
- 1959-05-19 GB GB1699859A patent/GB934436A/en not_active Expired
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