In Nature, Chinese researchers propose organocatalysis as a way to make the old but still vital chlor-alkali process more efficient. Selectivity and activity are promising, but long-term stability is a concern.

One of the oldest and most fundamental processes in the chemical industry is the chlor-alkali process: electrolysis of a salt solution produces chlorine (Cl₂) and sodium hydroxide (NaOH). Both products are in turn the basis for numerous other processes, so the production volumes are immense. Add to this the fact that the chlor-alkali process consumes energy (about 1% of the world’s electricity production) and it is clear that any improvement in efficiency can immediately lead to huge savings on many fronts.