Freezing Properties of Alkenyl Succinic Anhydrides Derived from Linear Isomerized Olefins

Abstract

Alkenyl succinic anhydrides are important specialty chemicals that are used in the paper, oilfield and fuel additives industries. In this paper we investigate the link between the physical properties of alkenyl succinic anhydrides and the identities of their linear alkyl olefin precursors. We describe a straightforward GC analysis of olefin isomer distributions and show that these correlate well with the freezing temperatures of the subsequent alkenyl succinic anhydride products. This allows the identification of olefin isomer profiles that are required to give the desired physical properties in the alkenyl succinic anhydrides; it also provides a method to predict the freezing temperatures of alkenyl succinic anhydrides synthesised from a particular supply of olefin.

Continuous heterogeneous isomerization of 3/4-methyltetrahydrophthalic anhydride (3/4-MTHPA) with acid- and base-modified γ-Al2O3 catalysts

“…The ring has internal and external types, as well as a difference in double bond position, according to stereoisomerism and structural isomerism. To isomerize C 18 linear olefins and react with maleic anhydride, Philip B. Sellars et al 19 applied a variety of catalysts, including basic metal-alumina, strong base- or acid-treated clays and zeolites, acidic polymer resins, and organometallic reagents. Mehmet Ozdemir et al first reported the cis – trans isomerization of diaryl-substituted fumaric acid, elucidated the trans – cis acidic isomerization mechanism of dimethyl 2,3-bis(5-alkyl thiophene-2-yl)fumarate.…”