<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

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.

Preparation methods of calcium sulphate and urea adduct

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

Polish Journal of Chemical Technology

{"article-title":"Preparation methods of calcium sulphate and urea adduct"}

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...

Preparation methods of calcium sulphate and urea adduct

Published Online: Jan 30, 2008

Page range: 111 - 114

DOI: https://doi.org/10.2478/v10026-007-0102-z

Keywords
adduct, calcium sulphate, fertilizer, gypsum, phosphogypsum, urea

This content is open access.

Preparation methods of calcium sulphate and urea adduct

Published Online: Jan 30, 2008

Page range: 111 - 114

DOI: https://doi.org/10.2478/v10026-007-0102-z

Keywordsadduct, calcium sulphate, fertilizer, gypsum, phosphogypsum, urea

This content is open access.

Keywords
adduct, calcium sulphate, fertilizer, gypsum, phosphogypsum, urea