Adip solutions specific heat

Figures 2-68 through 2-71 give the viscosities of MEA DEA DGA MDEA, and DIPA (ADIP) as a function of temperature. Heat capacity data for the same amines are given in Figures 2-72 through 2-77. Figure 2-77 shows the effect of add gas loading on the specific heat of aqueous amine solutions. It is based on MEA data, but is believed to be tproximaie-ly valid for other amines.

Amidation. Heating of the diammonium salt or reaction of the dimethyl ester with concentrated ammonium hydroxide gives adipamide [628-94-4] mp 228°C, which is relatively insoluble in cold water. Substituted amides are readily formed when amines are used. The most industrially significant reaction of adipic acid is its reaction with diamines, specifically 1,6-hexanediamine. A water-soluble polymeric salt is formed initially upon mixing solutions of the two materials then hea ting with removal of water produces the polyamide, nylon-6,6. This reaction has been studied extensively, and the hterature contains hundreds of references to it and to polyamide product properties (31). 

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See also in sourсe #XX -- [ ]

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