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Effects of ultrasonic fields in the phosphoric acid processA process of apatite decomposition with sulfuric acid was studied under the influence of ultrasound in the phosphoric acid production process. The studies were carried out with and without ultrasonic fields in the reaction mixture, which resembled the mixing ratio used in technical production processes. Ultrasound with a frequency of 20 kHz and an intensity of 1 W/sq cm was used in the studies. A very favorable ultrasonic effect upon the degree of apatite decomposition was observed. The ultrasonic field affects the shape of byproduct gypsum crystals. In the H3PO4 production process without ultrasound, the byproduct gypsum crystallizes as long, thin needles which cause problems in filtration. In the trials involving the application of wound, gypsum crystallized in the form of small platelets possessing a favorable ratio of length to width.
Document ID
19740015136
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kowalska, E.
(Kanner (Leo) Associates Redwood City, CA, United States)
Mizera, J.
(Kanner (Leo) Associates Redwood City, CA, United States)
Jakobiec, H.
(Kanner (Leo) Associates Redwood City, CA, United States)
Date Acquired
August 7, 2013
Publication Date
April 1, 1974
Publication Information
Publication: The 4th Natl. Conf. on acoustics, Vol. 2, B (NASA-TT-F-15663)
Subject Category
Chemistry
Accession Number
74N23249
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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