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:
Feb. 03, 1976
Filed:
Sep. 26, 1974
Applicant:
Inventors:
Luigi Piccolo, Milan, IT;
Benedetto Calcagno, Milan, IT;
Marcello Ghirga, Bresso (Milan), IT;
Antonio Paolinelli, Milan, IT;
Assignee:
Societa' Italiana Resine S.p.A., Milan, IT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C05D / ; C05D / ; C10C / ; C01G / ;
U.S. Cl.
CPC ...
71 63 ; 71 6 / ; 71 6 / ; 423548 ; 423632 ;
Abstract
Compositions useful in agriculture as soil modifiers and fertilizers are prepared by contacting the waste materials, obtained in the manufacture of titanium dioxide from ilmenites by the sulphate process, and which consist essentially of ferrous sulphate, with oxides, hydroxides or carbonates of alkali metals or alkaline earth metals or ammonium carbonate, and then submitting the reaction product to oxidation to convert the ferrous hydroxide into ferric hydroxide. Ferric hydroxide is further converted to ferric sulphate by treatment with sulphuric acid.