methyl caprate

methyl caprate

[′meth·əl ′ka‚prāt]
(organic chemistry)
CH3(CH2)8COOCH3 A colorless, combustible liquid with a boiling point of 244°C; soluble in alcohol and ether; used in the manufacture of detergents, stabilizers, plasticizers, textiles, and lubricants. Also known as methyl decanoate.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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[15] measured sound velocity of methyl caprate and ethyl caprate at pressures up to 210 MPa in the temperature range 283.15 to 403.15 K.
Based on [15] data that sound velocity was obtained from experimental and density was obtained from calculated value by (7), [k.sub.m] was calculated in 0.1 to 210 MPa and 303.15 to 383.15 K and the fitting results were presented with isothermal characteristics for methyl caprate and ethyl caprate in Figures 1 and 2.
We may safely draw the conclusion that molecular compressibility is dependent on pressure for ethyl and methyl caprate; this dependence on pressure was revealed sufficiently with elevated pressure In Figures 1 and 2.
Accordingly, the calculated results were presented with isobaric characteristics for methyl caprate and ethyl caprate in Figures 3 and 4, and a two-order polynomial fitting in temperature domain was expressed as
At atmospheric pressure (0.1 MPa isobaric) [k.sub.m] of methyl caprate shows a slight downtrend with two-order form described in (10) but not first-order form described in Daridon's formula (5); however for 0.1 MPa isobaric of ethyl caprate is almost horizontal; meanwhile [k.sub.m] show uptrend, which accelerates with increasing pressure, at isobaric with temperature elevated.
[T.sub.ref], which is reference temperature, was considered as the cloud point temperature of an organic liquid under reference pressure [P.sub.ref], for ethyl caprate [T.sub.ref] being 253.15 K and for methyl caprate [T.sub.ref] being 260.15 K.
The results comparison of three formulas was showed in Figures 7 and 8 for methyl caprate and ethyl caprate, respectively.
Daridon, "Sound velocity, density, and derivative properties of fatty acid methyl and ethyl esters under high pressure: methyl caprate and ethyl caprate," Journal of Chemical & Engineering Data, vol.