Colombo Umberto, Sironi Giuseppe, Viviani Bruno, Colombini Ariano: Process for the purification of pyrite cinders from nonferrous metals, from arsenic and from sulfur. Montecatini Edison, March 14, 1972: US3649245 (6 worldwide citation)

A process for the purification of pyrite and pyrrhotite cinders from nonferrous metals, from arsenic and from sulfur. The process is characteristic in that the reduction of the hematite to magnetite is carried out in a fluid bed by direct injection of a hydrocarbon fuel and air in deficiency, at 850 ...

Colombo Umberto, Scacciati Giovanni, Sironi Giuseppe, Vaschetti Amos: Continuous process for obtaining high-grade zinc oxide from zinc-containing minerals. Montecatini Edison, Montiponi E Montevecchio, March 14, 1972: US3649186 (4 worldwide citation)

A continuous process for obtaining zinc oxide of a grade higher than 75 percent from oxidized zinciferous ores, which comprises: Preheating the zinc-containing mineral and calcining it at temperatures above 800.degree. C. (preferably at 900.degree.-1,000.degree. C.) by the combustion products of the ...

Sironi Giuseppe, Fagherazzi Giuliano, Ferrero Francesco, Parrini Gianfranco: Continuous process for producing barium and strontium hard ferrites starting from iron oxides. Montecatini Edison, Stevens Davis Miller & Mosher, July 15, 1975: US3895092 (3 worldwide citation)

A continuous process is disclosed for producing barium or strontium ferrites, starting from iron oxide and barium or strontium carbonates, whereinA. a slurry consisting of iron oxide, barium or strontium carbonate, water and binder, is dried and granulated, utilizing the hot gases flowing from step ...


Colombini Ariano, Viviani Bruno, Sironi Giuseppe: Purification of iron pyrites cinders. Montedison, August 18, 1971: GB1242938-A (2 worldwide citation)

1,242,938. Purifying roasted iron pyrites. MONTECATINI EDISON S.p.A. 7 July, 1969 [8 July, 1968], No. 34115/69. Heading C1A. Iron pyrites cinders (haematite) is freed from arsenic and non-ferrous metals by reducing the cinders, using air and a carbonaceous fuel, at 850-950 C. with a contact time of ...



Veronica Giacinto, Sironi Giuseppe, Colombini Ariano: Arsenic removal from iron minerals. Montedison, September 16, 1970: GB1205453-A (1 worldwide citation)

1,205,453. Arsenic removal from iron minerals. MONTECATINI EDISON S.p.A. 18 Oct., 1967 [21 Oct., 1966], No. 47530/67. Heading C1A. Arsenic is removed from iron minerals and pyrite cinders by adding lime or limestone, heating to 800-1000 C. in an oxidizing atmosphere, separating at a particle size of ...

Sironi Giuseppe, Sacerdote Renzo, Ferrero Francesco: Purification of titanium tetrachloride. Montedison, November 18, 1970: GB1213089-A (1 worldwide citation)

1,213,089. Purifying titanium tetrachloride; sulphur. MONTECATINI EDISON S.p.A. 12 May, 1969 [10 May, 1968], No. 24036/69. Heading C1A. Vanadium compounds (e.g. VOCl 3 , VCl 4 ) which exist as impurities in titanium tetrachloride are removed therefrom by treating with hydrogen sulphide at from 130-1 ...

Ribaldone Giuseppe, Sironi Giuseppe, Paffoni Camillo, Grecu Renato: Procede dobtention de composes anthraquinoniques, Anthraquinone compounds and process for preparing same. Montedison, ROBIC ROBIC & ASSOCIES ASSOCIATES, October 20, 1981: CA1111031

ABSTRACT OF THE DISCLOSURE: The present invention relates to a new class of compoundsbelonging to the anthraquinone series, having the general formula: Image (I)wherein R, R', R", R"', R'v are indifferently H or Chlorine, Bromine, -OH, -OCH3, Image , - NH - alkyl having1 to 4 carbon atoms, Image , I ...