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2007 | 9 | 4 | 111-114
Article title

Preparation methods of calcium sulphate and urea adduct

Content
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Languages of publication
EN
Abstracts
EN
The paper presents the results of laboratory studies on the preparation of calcium sulphate and urea adduct by: grinding, compacting and mixing in the presence of physical water. A method for the measurement of urea conversion into the adduct form, which is based on the difference in solubility of free urea and the adduct bound urea CaSO4·4CO(NH2)2 in n-butanol, was developed. Mixing the reagents in the presence of physical water produced the best results. High urea conversion into the adduct form, over 85%, in the prepared samples indicates that this method can be successfully used to get CaSO4·4CO(NH2)2 adduct.
Keywords
Publisher

Year
Volume
9
Issue
4
Pages
111-114
Physical description
Dates
published
1 - 12 - 2007
online
30 - 1 - 2008
Contributors
  • The State Higher Vocational School, ul. Grodzka 19, 48-300 Nysa, Poland
  • Institute of Inorganic Technology and Mineral Fertilizers, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
  • Institute of Inorganic Technology and Mineral Fertilizers, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
References
  • Tengler S.: Niektóre międzycząsteczkowe połączenia mocznika ze związkami nieorganicznymi, Chemik, 1972, 8, 308.
  • Durski Z.: Krystaliczne addukty mocznika ze związkami nieorganicznymi, Wiadomości. Chemiczne, 1971, 25, 829.
  • Whittaker C., Lundstom F., Hendricks S.: Reaction between urea and gypsum, Industrial & Engineering Chemistry, 1933, 11, 1280.
  • Achard P., Schwob Y., Limousin L.: A new route for urea-superphosphate fertilizers, Phosphorus & Potassium, 1994, 191, 27.
  • Patent USA 2074880, 1937.
  • Nagai S., Hara Z.: Studies on gypsum - urea or urea - calcium sulphate complex I, Journal of Society Chemical Industry Japan, Suppl. Bind., 1939, 42, 210.
  • Nagai S., Miyake R., Studies on gypsum - urea or urea - calcium sulphate complex II, Journal of Society Chemical Industry Japan, Suppl. Bind., 1940, 43, 209.
  • Kotuła E., Nowak R.: Czteromocznikan siarczanu wapnia - nawóz azotowo-siarkowo-wapniowy jako alternatywa utylizacji fosfogipsu, Prace Nauk. Politechniki Szczecińskiej, 1998, 547, ITN 5, 91.
  • Maciaszek, S.: Mocznik, WNT, Warszawa 1967.[PubMed]
  • Patent USA 3976467, 1976.
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_v10026-007-0102-z
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