Why is continuous distillation preferred over batch distillation for high-purity GMA production?

Why is continuous distillation preferred over batch distillation for high-purity GMA production?
GMA is thermally sensitive—prolonged heating triggers self-polymerization, oligomer formation, color rise, and hydrolyzable chlorine spikes. Batch distillation holds material in the hot sump for hours, causing inconsistent impurity removal across the run. Early, middle, and late fractions differ, so hydrolyzable chlorine and color drift between batches. Continuous distillation operates at steady state with short residence time, minimizing thermal degradation. It reliably produces 99.9% electronic-grade GMA with tight impurity control, while batch units typically cap out at 99.0-99.8% industrial grade. For export to demanding PCB ink and PGMA customers, batch consistency is the decisive factor—continuous processes with DCS automation deliver reproducible specs shipment after shipment, which is what long-term overseas contracts require.