UST103206I4 - Production of urea phosphate - Google Patents
Production of urea phosphate Download PDFInfo
- Publication number
- UST103206I4 UST103206I4 US06/324,515 US32451581A UST103206I4 US T103206 I4 UST103206 I4 US T103206I4 US 32451581 A US32451581 A US 32451581A US T103206 I4 UST103206 I4 US T103206I4
- Authority
- US
- United States
- Prior art keywords
- urea
- production
- acid
- mother liquor
- recycle
- 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
- DZHMRSPXDUUJER-UHFFFAOYSA-N [amino(hydroxy)methylidene]azanium;dihydrogen phosphate Chemical compound NC(N)=O.OP(O)(O)=O DZHMRSPXDUUJER-UHFFFAOYSA-N 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 4
- 238000000034 method Methods 0.000 abstract 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 239000002535 acidifier Substances 0.000 abstract 2
- 238000002425 crystallisation Methods 0.000 abstract 2
- 230000008025 crystallization Effects 0.000 abstract 2
- 239000012452 mother liquor Substances 0.000 abstract 2
- 235000011007 phosphoric acid Nutrition 0.000 abstract 2
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 239000004202 carbamide Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- YLBWHUGFJDGRBQ-UHFFFAOYSA-K iron(3+);urea;phosphate Chemical compound [Fe+3].NC(N)=O.[O-]P([O-])([O-])=O YLBWHUGFJDGRBQ-UHFFFAOYSA-K 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
Images
Abstract
A two-stage continuous crystallization process for production of urea phosphate by reaction of impure wet-process orthophosphoric acid (about 54 percent P2 O5) and urea with simultaneous addition of a selected acidifying agent (sulfuric acid, hydrochloric acid, or phosphoric acid) to clarified mother liquor used as recycle in the process. Addition of the acidifying agent decreases pH in the crystallization process whereby the solubility of a contaminating water-insoluble iron phosphate-urea salt [FeH3 (PO4)2.2CO(NH2)2 ] is increased, purity of the crystalline urea phosphate product is improved significantly, and the useful storage life of the recycle mother liquor is prolonged.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/324,515 UST103206I4 (en) | 1981-11-24 | 1981-11-24 | Production of urea phosphate |
| US06/376,809 US4461913A (en) | 1981-11-24 | 1982-05-10 | Production of urea phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/324,515 UST103206I4 (en) | 1981-11-24 | 1981-11-24 | Production of urea phosphate |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/376,809 Continuation US4461913A (en) | 1981-11-24 | 1982-05-10 | Production of urea phosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST103206I4 true UST103206I4 (en) | 1983-07-05 |
Family
ID=23263938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/324,515 Pending UST103206I4 (en) | 1981-11-24 | 1981-11-24 | Production of urea phosphate |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST103206I4 (en) |
-
1981
- 1981-11-24 US US06/324,515 patent/UST103206I4/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STCF | Information on status: patent grant |
Free format text: PATENTED CASE |