Stearic Acid → Zinc acrylate

Participants

Reaction Conditions

Reaction Steps

To a 4000 liter jacketed stainless steel reactor, at room temperature, were fed successively toluene (1472 kg), zinc oxide (366 kg, 99% purity, 4.41 kmol) and stearic acid (65.1 kg, 0.23 kmol). Then, the temperature was raised to 55±5° C. To the reactor was added dropwise acrylic acid (587 kg, 8.15 kmol) over 2.5 hours, and continued the stirring while keeping at this temperature for additional 2 hours in order to complete the reaction. To this reaction mixture was added Sinopol 1807 (2.0 kg, HLB 10.7, comprising mainly polyoxyethylene octadecyl ether). After stirring for additional 30 minutes, the resulting cream-like mixture was fed into a paddle dryer for distilling off toluene and water under reduced pressure, and pulverizing the powder. A modified zinc acrylate as a white fine powder was thus obtained (910 kg, 96.5% yield). Moisture content<0.5 wt %, acryl content is 55 wt % and ash content is 39 wt %. IR spectrum (KBr): λ 2917, 2848, 1644, 1576, 1522, 1447, 1433, 1373, 1274, 1067, 974 cm−1. After discharging the material, no cluster stuck on the blade in the dryer was observed, and no cake was detected in the powder.

Provenance & Evidence