Isomeric linear phenylalkanes and sodium alkylbenzenesulfonates

Abstract

Linear phenylalkanes made from 12, 14, 16 and 18 carbon a-olefins and benzene, with a]uminum chloride or methanesulfonic acid as the condensing agent, were found by gas-liquid chromatography of the acetophenone homologs obtained by chromic acid oxidation to be a mixture of all possible internal position isomers. Product distribution measured by the relative amounts of acetophenone homologs must be corrected in the case of the 2-and 3-phenylalkanes because of unequal oxidative seission and differing ease of oxidation. The 2-phenyl isomer, formed in largest amount and presumably the highest melting isomer, was separated by low temperature crystallization from acetone.The phenylalkane product mixtures and the isolated 2-phenyl isomers were sulfonated and detergent and surface active properties were compared. The sodium p-a]ky]benzenesulfonates from the 2-phenylalkanes were more biodegradable than the mixtures in the river water die-away test.

Impact of composition on the performance of sodium linear alkylbenzenesulfonate (NaLAS)

“…This is expected because the Krafft temperature of the mixture is determined by the component with the highest Krafft temperature. The Krafft temperature of NaLAS homologs increases with increasing alkyl chainlength (7). The effect of phenyl isomer distribution on solubility is shown in Figure 11.…”

Phenyloctadecanol and surface‐active derivatives

“…Gas-liquid chromatography (GLC) of ketones from CrOa oxidation has been used to stiow the product distribution of phenylstearic acid (9) and linear phenylalkanes (10). It is an excellent method to reveal the number of position isomers but may not be quantitative because of unequal oxidative scission and differing ease of oxidation.…”

Development of group-contribution models for use in surfactant selection – case studies of single and mixed surfactant applications

“…1. Sources of these data set come from many works (Raisen, 1957, Weil et al, 1963, J.K. et al, 1966, Smith et al, 1966, Götte, 1969, Takeshi et al, 1970, Shinoda et al, 1972, Ueno et al, 1974, Valint et al, 1987, Os et al, 1993, Ohbu et al, 1998, Vautier-Giongo et al, 2003.…”