Patent ID: 11946115
Assignee: STC S.R.L. SCIENCE TECHNOLOGY & CONSULTING
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 0:
1. A process for the desulphurization of materials and/or residues containing lead sulphate, wherein the only desulphurising agent is an amino compound selected among urea, guanidine, guanine or arginine, and where the process occurs in a single stage in a closed reactor where the amino compound in an aqueous solution between 20% and 50% m/v, reacts directly with the material that has to be desulphurised with the following operational conditions:
temperature between 50 and 190° C.;, 1. pressure between 1 and 12 atmospheres (atm);
reaction time between 5 and 120 minutes (min); and
liquid/solid ratio m/m between 0.5 and 4,
obtaining a suspension at the end of the desulphurization reaction.