简介:Chromiumacetylacetonateandbis(diphenylphosphino)isopropylaminewerecoordinatedinsituandsupportedonmethylaluminoxane-modifiedsilica.Thecatalyststructureandeffectsofreactiontemperature,reactionpressureandAl/Crmolarratioonethylenetetramerizationwereinvestigatedindetail.Chromiumwasuniformlyandfirmlyimmobilizedonthesupportandcouldnotbeleachedoffbymethylaluminoxane.Thesupportedcatalyst,uponbeingactivatedwithmethylaluminoxane,exhibitedcatalyticactivityof1.70×107g/(molCr·h)forethylenetetramerizationtoform1-octeneatareactiontemperaturesof80℃,apressureof2.0MPaandanAl/Crmolarratioof300.Thesupportedcatalystpresentedagoodtolerancetohightemperature.
简介:日前,康菲石油中国有限公司已取得蓬莱19—3油田总体开发工程和环境影响报告书的核准文件。经过排液泄压、维护治理等一系列整改措施,蓬莱19—3油田已恢复正常状态。国家海洋局同意康菲公司逐步实施恢复生产相关作业。蓬莱19—3油田于2011年6月发生重大漏油事故后,一直处于停运状态。