1944
DOI: 10.1038/154706a0
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Formation of Sulphamic Acid during the Thermal Decomposition of Ammonium Sulphate

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Cited by 13 publications
(17 citation statements)
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“…A thermal process for the degradation of ammonium sulfate to ammonia and sulfur dioxide was first reported in the mid 1940s (Dixon, 1944). Similar processes have been reported by other researchers (Halstead, 1970;Kiyoura and Urano, 1970).…”
Section: Introductionsupporting
confidence: 69%
“…A thermal process for the degradation of ammonium sulfate to ammonia and sulfur dioxide was first reported in the mid 1940s (Dixon, 1944). Similar processes have been reported by other researchers (Halstead, 1970;Kiyoura and Urano, 1970).…”
Section: Introductionsupporting
confidence: 69%
“…It is worthy of mention here that despite the efforts of many chemists since the 18th century [109,110,111,112], the exact mechanism of thermal decomposition of (NH 4 ) 2 SO 4 remains elusive. Nevertheless, the use of (NH 4 ) 2 SO 4 as a sulfonating agent, as far as we are aware, is not common in practice, presumably, due to its most feasible two-steps decomposition pathway [113] as shown in Equations (1) and (2): 2(NH 4 ) 2 SO 4 → (NH 4 ) 2 S 2 O 7 + 2NH 3 + H 2 O 3(NH 4 ) 2 S 2 O 7 → 2NH 3 + 6SO 2 + 2N 2 + 9H 2 O (NH 4 ) 2 SO 4 → 2NH 3 + SO 3 + H 2 O …”
Section: G-nms Vs Sulfonation and Sulfationmentioning
confidence: 99%
“…The published literatures revealed disagreement as to the nature of the intermediate species formed during thermal decomposition of ammonium sulphate. Nevertheless, a general consensus [30,[32][33][34] is that the decomposition mechanism may involve the following steps:…”
Section: Reaction Between Par and Ammonium Sulphatementioning
confidence: 99%
“…Meantime, sulphamic acid is formed by release of H 2 O at 170 • C (Equation ( 6)), which would further decompose into various gases including NH 3 , SO 2 , N 2 , and H 2 O (Equation ( 7)) [33]. Dixo [32] pointed out that the ammonium pyrosulphate ((NH 4 ) 2 S 2 O 7 ) from the reactions (Equations (8) and ( 9)) accounts for 90% of the products of ammonium sulphate during the thermal decomposition at 400 • C. But this is not consistent with the results in this article, where only triammonium hydrogen sulphate was detected by XRD. This may due to the formation of NH 4 HSO 4 from the dehydration of (NH 4 ) 2 S 2 O 7 .…”
Section: Reaction Between Par and Ammonium Sulphatementioning
confidence: 99%