The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 1981
Filed:
Sep. 14, 1979
Applicant:
Inventors:
Luigi Piccolo, Milan, IT;
Tullio Corsini, Sesto Calende, IT;
Antonio Paolinelli, Milan, IT;
Gaudenzio Ferri, Milan, IT;
Angelo La Rovere, Seveso, IT;
Assignee:
Euteco Impianti S.p.A., Milan, IT;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C01F / ; C01G / ;
U.S. Cl.
CPC ...
106109 ; 423555 ; 423558 ; 423D / ; 106118 ; 106900 ;
Abstract
Ferrous sulphate heptahydrate obtained as a by-product of the production of titanium dioxide by the sulphate process is converted into a non-polluting, free-flowing particulate neutralization product by contacting said sulphate with calcium hydroxide as a neutralizing agent in a molar ratio between said neutralizing agent and said ferrous sulphate of at least 1:1, and reacting the resulting mixture under agitation at a temperature not exceeding 60.degree. C. and for a contact time not exceeding five minutes.