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Propane dehydrogenation (PDH) is a strong heat absorption process, which can produce a good propylene yield under high temperatures and relatively low pressure. At the moment, there are several processes like Oleflex process from UPO, Catofin process from Lummus-Houdry and STAR process from Krupp Uhdewcng, which have been commercialized. Often propylene and ethylene are used in the propane dehydrogenation (PDH) process to realize gradual cooling and separate olefins. In the low temperature section, we use multi - stream cold box.
Zhongtai supplied PDH cold box for Ningbo Haiyue utilization of 1.38 million ton propane and mixed C4 first phase propane dehydrogenation project, which successful started on September 02, 2014.