TheR&Dproject'commercialtestofolefinisomerizationtechnologyforincreasingbutene-1output'jointlyundertakenbytheSINOPECShanghaiPetrochemicalResearchInstituteandtheZhongyuanPetrochemicalCompanyhadpassedthetechnicalappraisalsponsoredbytheScienceandTechnologyDevelopmentpisionofSINOPECon