Zhenhai Refining and Chemical: 400,000 t/yr acrylonitrile unit achieves one-year stable operation
- The 400,000‑ton/year acrylonitrile unit has operated safely for one year after commissioning.
- It is the world's largest single-set acrylonitrile unit and the first industrial application of a 400,000 t/yr complete technology process package.
- In October 2025 the unit completed full-gradient strict calibration with material and energy consumption significantly below design values.
- Implemented measures include a cooling-water recovery cascade reuse system and a batch-differentiated incineration control strategy that breaks the low-load operation limit.
Operation status
The 400,000-ton/year acrylonitrile unit at Zhenhai Refining and Chemical has safely operated for one year after commissioning, with all systems running smoothly and key parameters continuously optimized.
Scale and technology
The unit is the world's largest single-set acrylonitrile unit and the first industrial application of a 400,000 t/yr large-scale acrylonitrile complete technology process package.
Performance and calibration
In October 2025 the unit completed full-gradient strict calibration; material and energy consumption were significantly lower than design values. The technical research team has promoted device optimization and cost reduction since commissioning.
Resource-efficiency measures
A cooling-water recovery project established an internal cascade water-reuse system for closed-loop efficient water utilization and notable water savings. An innovative batch-differentiated incineration control strategy was adopted to overcome low-load operation limits and support safe, stable operation.
Source: Sinopec
