The New Process of Energy Conservation Suited to the “MDI Rectification Process” Introduced by the Qingdao Science and Technology University

Under the financial support of the State Development and Reform Commission the Qingdao Science and Technology University and the Yantai Wanhua Group have jointly developed in 2000 “the technology for manufacture of 40 kt/a MDI”, making China the fifth country in possession of this technology, which has been successfully applied in the revamp and expansion of the 50 kt/a MDI project. In order to further optimize the process and reduce the specific consumption of the product,