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A new butadiene process is set for commercialization

By Gerald Ondrey |

China’s largest private chemical EPC (engineering, procurement, construction) contractor, Wison Engineering Ltd. (Wison; Shanghai; www.wison.com) has recently introduced details about its proprietary butadiene technology, which is set for commercialization. The process aims to meet the anticipated growth in annual butadiene consumption, which will “far exceed” global expansion in capacity, says Wison’s technical director and chief technologist, Yansheng Li. China, in particular, is seeing butadiene demand rising significantly due to the increasing number of synthetic rubber projects, he says. In Wison’s oxidative dehydrogenation (ODH) process (flowsheet), butanes and lighter components are first separated in the C4 pre-separation unit. Butenes are then mixed with air and steam and dehydrogenated in the ODH reactor. After recovering the heat, the reaction gas is further cooled and scrubbed to remove acids and other impurities, then compressed. Crude 1,3-butadiene (13BD) is recovered by an absorber/deabsorber unit, and then purified in a 13BD-extraction unit. The ODH reaction features a new, patent-pending catalyst developed by Wison, which is based on the traditional B-02 (iron-based) catalyst technology.…
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