Production of single superphosphate labeled with 34S

Abstract

Single superphosphate is currently one of the mostly used fertilizers as an alternative source for phosphorus and sulphur. SO 2 gasoso foi realizada em linha de vácuo a 900ºC na presença de NaPO 3 . A determinação isotópica do S (% em átomos de 34 S) foi realizada no espectrômetro de massas. O rendimento da produção do Ca(H 2 PO 4 ) 2 e do superfosfato simples marcado foi em média 97 e 99%, respectivamente, e a pureza do superfosfato marcado foi estimada como 96%. Não foi observado fracionamento isotópico no processo de produção do superfosfato simples marcado com 34 S. Palavras-chave: determinação isotópica, enxofre, isótopos estáveis, espectrometria de massas, compostos marcados

Calcium orthophosphates (CaPO4): occurrence and properties

“…Manufacturing of elementary phosphorus (white and red) (Jacob and Reynolds 1928 ; Emsley 2001 ), phosphoric acids (Becker 1989 ; Dorozhkin 1996 , 1997 , 1998 ; Gilmour 2014 ), various P-containing chemicals, agricultural fertilizers [namely, superphosphate (Copson et al 1936 ; Newton and Copson 1936 ; Rossete et al 2008 ), ammonium orthophosphates (Magda et al 2008 )] and detergents [principally sodium tripolyphosphate (Kijkowska et al 2007 )] are the major industrial applications of natural CaPO 4 . The annual consumption of a phosphate rock has approached ~150 million tons and about 95 % of this production is utilized in the fertilizer industry (Abouzeid 2007 , 2008 ).…”

Calcium orthophosphates (CaPO 4 ): Occurrence and properties

“…Manufacturing of elementary phosphorus (white and red) (Jacob and Reynolds 1928;Emsley 2001), phosphoric acids (Becker 1989;Dorozhkin 1996Dorozhkin , 1997Dorozhkin , 1998Gilmour 2014), various P-containing chemicals, agricultural fertilizers [namely, superphosphate Newton and Copson 1936;Rossete et al 2008), ammonium orthophosphates (Magda et al 2008)] and detergents [principally sodium tripolyphosphate (Kijkowska et al 2007)] are the major industrial applications of natural CaPO 4 . The annual consumption of a phosphate rock has approached *150 million tons and about 95 % of this production is utilized in the fertilizer industry (Abouzeid 2007(Abouzeid , 2008.…”

Calcium orthophosphates

“…Manufacturing of elementary phosphorus (white and red), 71 , 72 phosphoric acids, 37 , 73 - 76 various phosphorus-containing chemicals and, especially, agricultural fertilizers (namely, superphosphate, 77 - 79 ammonium orthophosphates 80 ) are the major industrial applications of natural calcium orthophosphates. The annual consumption of a phosphate rock has approached ~150 million tons, and about 95 percent of this production is utilized in the fertilizer industry 81 , 82 …”