Maleic Anhydride → Octadecyl hydrogen maleate

Participants

Reaction Steps

Into an autoclave, were charged 295 parts of maleic anhydride and 825 parts of stearyl alcohol. A mixture was reacted at 60° C. for 5 hours under sealed condition, to obtain maleic acid monostearyl ester, containing 1.5% unreacted maleic anhydride. After adding to the mixture, 11.2 parts of toluene, 275 parts of allyl chloride and 530 parts of tri-n-propyl amine, an atmosphere was substituted with nitrogen. The mixture was reacted at 80° C. for 8 hours, and cooled to a room temperature. The mixture was rinsed by 90 parts of 10% hydrochloric acid aqueous solution, followed by distillation of toluene, to obtain 1,200 parts of stearyl allyl maleate of 94.5% purity and of Gardner Color 9. A molar ratio of maleic anhydride:stearyl alcohol was 1:1.02, and maleic acid monostearyl ester:allyl chloride:tri-n-propyl amine was 1:1.19:1.23.

Provenance & Evidence