Title: Novel composition for use in agriculture as soil improvers and fertilizers and process for their production

Abstract: Novel compositions for use in agriculture as soil improvers and fertilizers comprising as essential components ammonium sulfate and ferric oxide hydrate. By-products obtained in the production of titanium dioxide from ilmenite or ilmenite slag in the sulfate process and substantially consisting of ferrous sulfate heptahydrate are reacted with ammonia and that the reaction product obtained, consisting substantially of ammonium sulfate and ferrous hydrate, is subsequently oxidized until a composition is obtained which substantially consists of ammonium sulfate and ferric oxide hydrate.

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Inventors: Piccolo, Luigi (Milan, IT)
Calcagno, Benedetto (Milan, IT)
Ghirga, Marcello (Bresso (Milan), IT)
Paolinelli, Antonio (Milan, IT)

Application Number: 631275
Filing Date: 1975-11-12
Publication_date: 1978-01-31
Assignee: Societa' Italiana Resine S.I.R. S.p.A. (Milan, IT)
Primary Class(es): 71/31 71/63, 71/64.01, 423/548, 423/632
Other Classes:
US Patent Ref:

2374454	Apr, 1945	Oliver	423/632.
2741876	Apr, 1956	Paolini	71/63.

Other Refs:
Primary Examiner: Hart, Charles N.
Assistant Examiner: Lander, Ferris H.
Attorney: Sughrue, Rothwell, Mion, Zinn and Macpeak