Detail of "112-79-8"

Reference

trans Fatty acid content of commercial margarine samples determined by gas liquid chromatography on OV-275

trans Fatty acid content of commercial margarine samples determined by gas liquid chromatography on OV-275. Ottenstein, D. M.; Wittings, L. A.; Walker, G.; Mahadevan, V.; Pelick, N. (Supelco, Inc., Bellefonte, Pa., USA). J. Am. Oil Chem. Soc., 54(5), 207-9 (English) 1977. CODEN: JAOCA7. DOCUMENT TYPE: Journal CA Section: 17 (Foods) Gas chromatog. (GC) of margarine Me esters on a 20 ft .times. 1/8 in. column contg. 15% OV-275 on 100-20 mesh Chromosorb P AW-DMCS at 220.degree. provided practical sepns. of trans-octadecamonoenoate [112-79-8] from the corresponding cis-isomer [112-80-1] and of trans,trans- [506-21-8], and cis,trans-octadecadienoates [2420-42-0] from the corresponding cis,cis-isomer [60-33-3]. Trans acid content by GC was in reasonable agreement in 6 of 7 com. margarine samples.

Temperature dependence of the hydrogenation of sunflower oil

Temperature dependence of the hydrogenation of sunflower oil. Koman, V.; Sajbidor, J.; Majercak, J. (Dep. Tech. Mikrobiol. Biochem., Slov. Vys. Sk. Tech., Czech.). Zb. Pr. Chemickotechnol. Fak. SVST, Volume Date 1979-1981 117-24 (Slovak) 1986. CODEN: ZPCTA7. ISSN: 0524-2185. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Sunflower oil was hydrogenated at 102-202° for 60 min with 0.2 g active Ni/100 mL, as a com. catalyst contg. 14.7% active Ni. At 3162° the rate of hydrogenation exponentially increased with temp. Linoleic acid (I) [60-33-3] was hydrogenated mostly to trans-oleic acid (II) [112-79-8]. Fatty acids of the original oil comprised I 66.0, oleic acid [112-80-1] 20.8, sats. (C [57-10-3] + C [57-11-4]) 13.2, and II 3.1%. Hydrogenation at 174° gave 10.7, 69.2, 20.1, and 50.5% of these acids, resp., and at 202°, 0.1, 57.1, 42.8, and 41.1%, resp. The hydrogenation of I, esp. at 130-150°, was preceded by geometric isomerization, leading to formation of II + cis-oleic acid [112-80-1] which was cis?trans-isomerized to II. At 151° the linoleic selectivity showed a 95.7% max., i.e. ~96% of hydrogenated I was converted to oleic acid with a min. redn. to sat. A temp. increase to >151° decreased the selectivity by inducing competitive satn. of the oleic acid. The proportion of sats. and trans-octadecenoic acid [27251-59-8] increased. The activation energies for the dienes?monoenes?sats. redns. were 96 and 106 kJ/mol, resp.