UST101802I4 - Low polyphosphate suspension fertilizers from wet-process acid - Google Patents
Low polyphosphate suspension fertilizers from wet-process acid Download PDFInfo
- Publication number
- UST101802I4 UST101802I4 US06/194,642 US19464280A UST101802I4 US T101802 I4 UST101802 I4 US T101802I4 US 19464280 A US19464280 A US 19464280A US T101802 I4 UST101802 I4 US T101802I4
- Authority
- US
- United States
- Prior art keywords
- heat
- produced
- acid
- pounds
- percent
- 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
Links
- 238000000034 method Methods 0.000 title abstract 4
- 229920000388 Polyphosphate Polymers 0.000 title abstract 3
- 239000002253 acid Substances 0.000 title abstract 3
- 239000001205 polyphosphate Substances 0.000 title abstract 3
- 235000011176 polyphosphates Nutrition 0.000 title abstract 3
- 239000000725 suspension Substances 0.000 title abstract 3
- 239000003337 fertilizer Substances 0.000 title abstract 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 2
- 238000004090 dissolution Methods 0.000 abstract 2
- 239000004254 Ammonium phosphate Substances 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 abstract 1
- ZRIUUUJAJJNDSS-UHFFFAOYSA-N ammonium phosphates Chemical class [NH4+].[NH4+].[NH4+].[O-]P([O-])([O-])=O ZRIUUUJAJJNDSS-UHFFFAOYSA-N 0.000 abstract 1
- 235000019289 ammonium phosphates Nutrition 0.000 abstract 1
- 239000004927 clay Substances 0.000 abstract 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
Images
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
- C01B25/38—Condensed phosphates
- C01B25/40—Polyphosphates
- C01B25/405—Polyphosphates of ammonium
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/06—Alkali and alkaline earth meta- or polyphosphate fertilisers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
An energy efficient process and apparatus is described that consists of a pipe reactor, melt dissolution tank, acid and ammonia heat exchangers, product cooler, and clay addition facilities in which a concentrated polyphosphate containing ammonium phosphate suspension fertilizers is produced that can be stored and handled at temperatures well below 0° F. The suspension is produced from merchant-grade wet-process phosphoric acid which is ammoniated in a unique enlarged pipe-type reactor sized to have throughputs of 20-100 pounds P2 O5 /hr-in2 and 0.25-2 pounds P2 O5 /hr-in3 of internal reactor area and volume, respectively, and which can be operated for extended periods without clogging. All of the heat required by the process is obtained by transferring a portion of the heat of ammoniation from the hot liquid in the melt dissolution tank to the incoming acid and ammonia streams. The resultant product contains 10 to 40 percent polyphosphate and when produced within an N:P2 O5 weight ratio range of 0.265-0.335 and when containing 40-47 percent N+P2 O5, has excellent low temperature storage and handling properties. Operation outside the specified composition range will reduce the maximum plant food concentration possible and may cause some of the ammonium phosphate salts to crystallize and foul the heat-transfer surfaces.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/194,642 UST101802I4 (en) | 1980-10-06 | 1980-10-06 | Low polyphosphate suspension fertilizers from wet-process acid |
| US06/264,922 US4337079A (en) | 1980-10-06 | 1981-05-18 | Low polyphosphate suspension fertilizers from wet-process acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/194,642 UST101802I4 (en) | 1980-10-06 | 1980-10-06 | Low polyphosphate suspension fertilizers from wet-process acid |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/264,922 Continuation-In-Part US4337079A (en) | 1980-10-06 | 1981-05-18 | Low polyphosphate suspension fertilizers from wet-process acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST101802I4 true UST101802I4 (en) | 1982-05-04 |
Family
ID=22718361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/194,642 Pending UST101802I4 (en) | 1980-10-06 | 1980-10-06 | Low polyphosphate suspension fertilizers from wet-process acid |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST101802I4 (en) |
-
1980
- 1980-10-06 US US06/194,642 patent/UST101802I4/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STPP | Information on status: patent application and granting procedure in general |
Free format text: DEFENSIVE PUBLICATION OR SIR FILE |