New vacuum dewatering technology at Zhuhai, China removed the need for nitrogen purging, improving process efficiency and resource use.
The project saves 3.2 million Nm³ of nitrogen annually and recovers 200 MT of solvent that would previously have been lost as waste.
By reducing waste and energy-related impacts, the initiative helps avoid 1,400 MT of CO₂ emissions each year while strengthening operational performance.

At our Zhuhai site, the team found an innovative way to improve how water is removed during production while using fewer resources. Previously, the process relied on nitrogen purging, which requires large amounts of nitrogen gas and causes valuable solvent to be lost as waste. In 2025, the site introduced a new vacuum dewatering system that removes water more effectively without the need for nitrogen. The new system also allows the team to recover and reuse solvent that would have previously been lost.

What This Change Achieved

The new equipment is already delivering major benefits:

• Less nitrogen used: 3.2 million Nm³ saved every year

• More materials recovered: 200 MT of solvent recovered instead of wasted

• Lower emissions: 1,400 MT of CO₂ avoided each year

Over the span of two years, the team carried out theoretical modelling, lab bench testing and production trials before finalising a practical process.

This improvement demonstrates our commitment to conserving resources and strengthening day-to-day operations through effective execution.

Zhuhai Vacuum Dewatering Project Reduces Nitrogen Solvent Waste CO2 Emissions