Synthesis process of polyimide ether (PEI) precursor intermediate – 3-fluorophthalic acid, and suggestions for industrial scale-up
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The 25th National \"Safety Production Month\" in 2026: Everyone talks about safety, everyone knows how to handle emergencies; identifying and addressing risks and hazards --------------------------------------------------
【HaiChuan Modular Installation Discussion】Summary post – everyone is welcome to join the discussion! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1773168 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs))
【Ten Years of Rapid Development in Chemical Equipment】Reaching international leading levels by 3154-2026! “Evaluation of the achievements in “Key Technologies for Polymer Batch Supercritical Foaming and Its Green Industrial Application”! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5722917 (Source: Haichuan Chemical Industry Forum (Hua Hai Chuan Liu hcbbs))
【Ten Years of Rapid Development in Chemical Equipment】The world’s largest ethylene plant with a capacity of 1.8 million tons per unit was built by CCCC in Gulei from 2031 to 2026! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5723864 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs))
【Ten Years of Rapid Development in Chemical Engineering Equipment】The 10,000-ton biomass pressurized gasification pilot plant developed by China Energy Engineering Group over the period 2031–2026 has successfully completed a 72-hour continuous operation test! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5723938 (Source: Haichuan Chemical Industry Forum (Hua Hai Chuan Liu hcbbs))
Amazing! ! Actual on-site photos explain why storage tanks are designed with a weak roof structure! ! ! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5723994 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs))
【History of Haichuan Chemical】--In 2012, the first batch of qualified liquid chlorine products was produced and shipped from Hebei Shenghua Chlor-alkali Plant. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5724011 (Source: Haichuan Chemical Forum (Hua Haichuan Liu hcbbs))
【3D Process Flow】-- MVR Methanol Distillation Process: The “heat pump magic” in the chemical industry https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5724034 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs))