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

Claim 3:
4. 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, or the desulphurising agent is a mixture of at least two amino compounds selected among urea, guanidine, guanine, or arginine, where the process is carried out in multiple stages where the amino compound, before reacting with the material that has to be desulphurised, is activated through a distillation or a flash, obtaining a suspension at the end of the desulphurization reaction.