Why are Chinese hexamine producers shifting from liquid-phase to gas-phase technology?

Why are Chinese hexamine producers shifting from liquid-phase to gas-phase technology?
Several Chinese projects are converting existing liquid-phase hexamine lines to gas-phase processes, with one Xinjiang retrofit lifting capacity from 10,000 to 20,000 tonnes per year. The gas-phase route improves automation, product consistency and yield, which matters as quality standards tighten. China's output already climbed from roughly 15,000 tonnes in 1980 to over 100,000 tonnes by 2000, and consolidation has since pushed production toward larger, more efficient plants. For buyers, this shift means better availability of high-purity material and more stable supply, but also that smaller, outdated capacity will exit — potentially tightening spot availability during the transition period.