Manufacture of hydroxylated ferric sulphate compounds

Details Manufacture of hydroxylated ferric sulphate compounds Manufacture of hydroxylated ferric sulphate compounds

C - Chemistry, Metallurgy

01

G

23/91

C01G 49/14 (2006.01)

Patent

CA 1336856

A process for the manufacture of ferric sulphate from ferrous sulphate in a closed vessel comprising a liquid phase and a vapour phase, wherein the vapour phase is essentially a closed system, the process comprising the oxidation between about 70°C. to about 150°C. of Fe++ to Fe+++ under pressure utilizing commercial oxygen in the closed vessel using NOx as a catalyst where x is a number between 1 and 2 inclusive of 1 and 2, and wherein the process comprises the following reactions: Image , and 2FeSO4 + H2SO4 + NO2 -> Fe2(SO4)3 + H2O + NO, and wherein the oxidation of Fe++ is affected by spraying a reacting solution containing Fe++ introduced to the closed vessel, through a reacting cloud in the vapour phase comprising NO, NO2 and O2 enclosed in the vapour phase of the closed vessel and wherein the liquid phase fills at least 1/3 of the vessel and substantially only Fe2(SO4)3 is present in the liquid phase in the closed vessel prior to the addition of FeSO4 through the reacting cloud in the vapour phase and wherein the liquid phase is also sprayed through the vapour phase.

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