Detail of "2690-08-6"

Reference

Microbial desulfurization of petroleum and heavy petroleum fractions

Microbial desulfurization of petroleum and heavy petroleum fractions. 4. Anaerobic degradation of organic sulfur compounds of petroleum. Koehler, M.; Genz, I. L.; Schicht, B.; Eckart, V. (Sekt. Biol., Ernst-Moritz-Arndt-Univ. Greifswald, Greifswald 2200, Ger. Dem. Rep.). Zentralbl. Mikrobiol., 139(4), 239-47 (German) 1984. CODEN: ZEMIDI. ISSN: 0232-4393. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 16 The anaerobic desulfurization efficiency of a selected Desulfovibrio strain was investigated in the presence of H for a series of S-contg. model compds. Of 9 S compds., (PhCH2)2S [538-74-9] and dibenzothiophene [132-65-0] were degraded to a large extent. (Ph2CH2)2S2 [150-60-7], thianaphthenes, Bu2S [544-40-1], and dioctyl sulfide [2690-08-6] were only slightly degraded. Mercaptans were not degraded. Cell-free exts. desulfurized (PhCH2)2S, thiophene [110-02-1], and Bu2S. The degree of desulfurization is related to growth conditions and hydrogenase activity of the cells. The degrdn. products of (PhCH2)2S(H2S, PhMe [108-88-3], and PhCH2SH [538-74-9]) refer to different mechanisms of reductive splitting of S-C bonds.

Relations between the chemical reactivity of extreme-pressure additives and their lubricating properties

Relations between the chemical reactivity of extreme-pressure additives and their lubricating properties. Kramarz, J.; Chmura, M. (Fac. Chem., Tech. Univ. Krakow, Krakow, Pol.). Schmierungstechnik, 15(7), 209-12 (German) 1984. CODEN: SHRGAC. ISSN: 0371-0157. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Lubricating oil extreme-pressure additives were tested by heating the additive-contg. white oil base by an immersed elec.-heated wire and measuring the thickness of the formed layer. Additives tested were chloro paraffins, org. sulfides (R2S, R = PhCH2 [538-74-9], octyl [2690-08-6], and Ph [139-66-2]), org. disulfides (RSSR, R = PhCH2 [150-60-7], octyl [822-27-5], and Ph [882-33-7]), PhCH2Cl [100-44-7], and mixts. of PhCH2SSCH2Ph with chloroparaffins or PhCH2Cl. Activation energies for layer formation are 88.7-93.7 kJ/mol for the disulfides, 302.1-315.1 kJ/mol for the sulfides, 53.5 kJ/mol for PhCH2Cl, and 139.7 kJ/mol for the chloroparaffins. In addn., the additives were tested in a 4-ball std. test. Linear correlations were obtained between lubrication properties and chem. reactivity for the S compds. and the Cl compds. but not for the mixts.