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Southwest Research & Design Institute of Chemical Industry(SRDIC),Sichuan Tianyi Science & Technology Co.,Ltd.(Sichuan Tianyi) and Ningxia Baota Petrochemical Group(Baota Group) signed an agreement on January 29th.SRDIC and Sichuan Tianyi agree to license the production technology of 400 000 t/a dimethyl ether to Baota Group.Baota Group is constructing a 400 000 t/a dimethyl ether project in Linhe Compre-