Industrial purification of propylene and ethylene requires cryogenic distillation selective hydrogenation over palladium catalysts to remove propane, ethane and/or trace amounts acetylene. Here, we report the excellent separation equimolar mixtures propylene/propane ethylene/ethane, a 1/100 mixture acetylene/ethylene by highly robust microporous material, MFM-520, under dynamic conditions. In s...

Propylene is an important chemical intermediate in the chemical industry, which is conventionally produced either as a co-product to ethylene in steam crackers or byproductin refineries. With the increase in exploration of shale gas, new cracker projects for ethyleneproduction are based primarily on ethane feedstock, which yield almost no propylene [1,2] Onthe other hand, the demand...

Graft poly(ε-caprolactone)s (PCLs) with high graft density were synthesized by using random copolymer poly(ethylene-co-vinyl alcohol) (EVOH) to initiate ring-opening polymerization of ε-caprolactone, with and without cocatalyst Sn(Oct)2. The graft copolymer were characterized by IR, 1H and 13C NMR. The solution property and the crystallization behavior were also investigated.

Hierarchically porous silica monoliths with well-defined interconnected macropores and uniform spherical mesopores were spontaneously prepared by combining polymerization-induced phase separation with an epoxide-mediated sol-gel route without any complicated aging and drying and high-temperature heat treatment. The precise control of pore structures can be realized by using propylene oxide (PO)...

Copolymerization of racemic alpha-olefins with ethylene and propylene was carried out in the presence of enantiopure C1-symmetric ansa metallocene, {1,2-(SiMe2)2(eta5-C5H-3,5-(CHMe2)2)(eta5-C5H3)}ZrCl2 to probe the effect of the polymer chain end on enantioselection for the R- or S-alpha-olefin during the kinetic resolution by polymerization catalysis. Copolymerizations with ethylene revealed t...

Copolymerization of racemic -olefins with ethylene and propylene was carried out in the presence of enantiopure C1-symmetric ansa metallocene, {1,2-(SiMe2)2( -C5H-3,5-(CHMe2)2)( -C5H3)}ZrCl2 to probe the effect of the polymer chain end on enantioselection for the Ror S-olefin during the kinetic resolution by polymerization catalysis. Copolymerizations with ethylene revealed that the polymer cha...