On June 9th,2008 Shandong Dongying Ruhai Chemical Group Co.,Ltd.conducted successful wet commissioning on the 6 000 t/a paraformal-dehyde and 1 500 t/a co-product urotropine unit with new clean and high-effect process.The outstanding feature of the new paraform-aldehyde process developed by Hebei Univer-sity of Science and Technology is that while