Precipitated impurities in monoammonium phosphate and their effect on chemical and physical properties of suspension fertilizers
The TVA processes for the production of granular ammonium phosphate fertilizers use a preneutralizer or pipe reactor; a rotary drum ammoniator-granulator; accessory equipment for scrubbing off-gases; and equipment for drying, cooling, and sizing the product. Although the main interest in the processes has been in taking advantage of full ammoniation of the phosphoric acid for production of 18-46-0, there has been considerable interest in adapting these processes for production of monoammonium phosphate (MAP). This laboratory study was conducted to identify the solid-phase components in granular MAP, especially the forms of precipitated impurities. The first phase of the laboratory study concerned the identification of solid phases in granular MAP. The second phase of this laboratory study was conducted to correlate physical properties (viscosity and pourability) of 11-33-0 suspensions with the chemical and solid-phase composition of the original MAP from which these suspensions were prepared. The identification of these fertilizer compounds by the use of polarizing light microscopy (PLM), Fourier transform infrared (FTIR) spectroscopy, and x-ray diffraction (XRD) for detailed solid-phase characterization and chemical analysis has provided a more thorough understanding of the composition of MAP fertilizer. 14 refs., 1 fig., 10 tabs.
- Research Organization:
- Tennessee Valley Authority, Muscle Shoals, AL (USA). Div. of Chemical Development
- OSTI ID:
- 6020912
- Report Number(s):
- TVA/OACD-83/17; ON: DE86901151
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
AMMONIUM COMPOUNDS
AMMONIUM PHOSPHATES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
COHERENT SCATTERING
DATA
DIFFRACTION
ELEMENTS
EXPERIMENTAL DATA
FERTILIZERS
FLUORINE
HALOGENS
IMPURITIES
INFORMATION
INFRARED SPECTRA
NONMETALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
QUALITATIVE CHEMICAL ANALYSIS
SCATTERING
SPECTRA
SYNTHESIS
VISCOSITY
X-RAY DIFFRACTION