WebAmong 11 kinds of molecular sieves examined, H−ZSM-5 exhibited the highest activity for the direct conversion of ethylene to propylene. The conversion of ethylene was 58% … WebThe role of ethylene in promoting metathesis of acetylenic enynes is probed within the context of ring-closing enyne metathesis, using first- and second-generation Grubbs …
Propylene - Wikipedia
WebAnother patent application describes a process for converting an olefin feed containing butenes, diolefins and polyolefins to propylene with ethylene using molybdenum as a metathesis catalyst and MgO, K 2 CO 3, and K 2 O as isomerization catalysts. 34 In both cases, the use of a fluid catalytic cracking (FCC) mixture is mentioned as a source of ... WebThe present invention relates to a process for the producing propylene and ethylene from a light hydrocarbon stream comprising essentially ethane and butane. The process involves a non-catalytic cracking of ethane and normal-butane followed by a metathesis of ethylene and 2-butene to increase the propylene yield. Optionally the by-produced iso-butane is … phil long goffs oak
Olefin conversion technology - Wikipedia
WebApr 14, 2024 · Currently, propylene is mainly produced from crude oil via steam cracking as by-product of ethylene production 5, 6 and via olefin metathesis of 2-butene. 7-10 Although there is a growing demand for its sustainable production, its economically viable synthesis from plastic waste or renewable resources is not yet established. 11 WebAug 1, 2024 · From bio-ethylene, bio-propylene can be produced dimerization to butene followed by the metathesis of ethylene and butene, as proposed by Baskem [65]. CH 2 =CH 2 + CH 3 CH=CHCH 3 → 2 CH 3 CH=CH 2 The dehydration of ethanol to ethylene is well-known performed over acid catalysts such as Al 2 O 3 , zeolites [66] , [67] , [68] . Webrelative to ethylene subunits) and the dimeric Pd(I) bromide catalyst I1 (3mol%,0.33mol% relativetoethylenesubunits)at60°Cfor16hours formed propylene in 95% yield. Catalyst systems created from other combi-nations of individual metathesis and isomeri-zationcatalysts led to lower yields of propylene thanthosewith M1 andI1.Systemscontaining tsa exit strategy