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From the 1874 Deacon process to today's advanced RuO₂ catalysts - comprehensive overview of the technologies converting waste HCl to valuable chlorine, now published on ppPLUS.

Covers: Process chemistry, reactor designs, economics vs. electrolysis, and all major commercial technologies (Sumitomo Chemical, Mitsui Chemicals Group, Wanhua Chemical Group, Covestro, BASF).

📖 Essential reading for anyone in isocyanates, PVC, or specialty chemicals dealing with HCl management.

#deaconprocess #hcloxidation #chemicaltechnology #processengineering #chlorinerecovery

The ODC principle is based on the reduction of oxygen at the cathode. The oxygen then reacts with the hydrogen ions, which migrate through the membrane from the anode side of the cell. This suppresses the generation of hydrogen and forms water (H₂O):

Chemical equations:

• Anode (oxidation):
• Cathode (ODC reduction):
• Overall:

2 Cl⁻ → Cl₂ + 2e⁻
O₂ + 4 H⁺ + 4e⁻ → 2 H₂O
4 HCl + O₂ → 2 Cl₂ + H₂O

Compared to the Standard reaction for hydrogen generation, the ODC Process reduces the required operating voltage by approximately 1 volt, resulting in consequent energy savings.

The ODC process find applications in isocyanate plants by recycling HCl from phosgene production, for chlorine recovery from various HCl waste streams, and in integrated chemical complexes where hydrogen is not required.

#electrolyzer #electrolysis #hydrogenchloride #hclrecycling #odc #isocyanate #chlorinerecovery #thyssenkrupp #covestro #denora #phosgene

Just published a comprehensive update on HCl electrolysis technology in the Portfolio Planning PLUS Ltd database - a critical process for chlorine recovery, in particular in isocyanate manufacturing.

KEY HIGHLIGHTS:
✅ Three commercial technologies compared: ODC, Diaphragm, and Membrane cells
✅ Energy efficiency gains: ODC process delivers 30% energy savings (733-1070 kWh/t Cl₂)
✅ Process integration: Detailed plant configurations for each technology variant
✅ Industrial applications: Focus on chlorine recycle in MDI/TDI production

#chemicalengineering #processtechnology #isocyanates #chlorinerecovery #hclrecycling #denora #thyssekruppnucera #covestro