Abstract
AbstractAldehydes made from soybean or linseed oils, or their methyl esters, darkened and polymerized following preparation by ozonolysis and catalytic or chemical reduction in stainless‐steel pilot‐plant equipment. Treatment with a cation exchange resin in the hydrogen form substantially reduced the amount of color formed and the polymerization.When conducted prior to removal of volatiles by stripping the resin treatment of soybean aldehyde oil decreased final color from Gardner 17 to 10 with a concomitant decrease in molecular weight and viscosity due to decreased polymerization. Resin pretreatment of methyl azelaaldehydate (MAZ) increased distillation yields. Since addition of several metal salts to MAZ reduced distillation yield to varying degrees, metalcatalyzed polymerization must occur.
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