Abstract
Abstract and summaryKrafft point measurements were used to show that lime soap dispersing agents (LSDA) and soaps solu‐bilize each other. Addition of as little as 5% soap to amphoteric LSDA of limited water solubility (high Krafft point) brought about a substantial lowering of the Krafft point and thus markedly improved water solubility. On the other hand, addition of 10% amphoteric LSDA to sodium palmitate lowered the Krafft point of the soap by 10 to 14 C. Addition of anionic LSDA to sodium palmitate showed smaller Krafft point depressions. Addition of a builder‐type salt, such as sodium metasilicate, had essentially no effect on the Krafft points of soap LSDA mixtures.
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