| Issue |
Korean Journal of Chemical Engineering,
Vol.33, No.1, 277-284, 2016
Vol.33, No.1, 277-284, 2016
Phase behavior for the poly(alkyl methacrylate)+supercritical CO2+DME mixture at high pressures
The phase behavior curves of binary and ternary system were measured for poly(alkyl methacrylate) in supercritical CO2, as well as for the poly(alkyl methacrylate)+dimethyl ether (DME) (or 1-butene) in CO2. The solubility curves are reported for the poly(alkyl methacrylate)+DME in supercritical CO2 at temperature from (300 to 465) K and a pressure from (3.66 to 248) MPa. Also, The high-pressure static-type apparatus of cloud-point curve was tested by comparing the measured phase behavior data of the poly(methyl methacrylate) [PMMA]+CO2+20.0 and 30.4 wt% methyl methacrylate (MMA) system with literature data of 10.4, 28.8 and 48.4 wt% MMA concentration. The phase behavior data for the poly(alkyl methacrylate)+CO2+DME mixture were measured in changes of the pressure-temperature (p, T) slope and with DME concentrations. Also, the cloud-point pressure for the poly(alkyl methacrylate)+1-butene solution containing supercritical CO2 shows from upper critical solution temperature (UCST) region to lower critical solution temperature (LCST) region at concentration range from (0.0 to 95) wt% 1-butene at below 455 K and at below 245MPa.
Keywords:
Poly(alkyl methacrylate); Poly(methyl methacrylate); Poly(ethyl methacrylate); Poly(propyl methacrylate); Poly(butyl methacrylate); Cloud-point Pressures; Supercritical CO2; Dimethyl Ether
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