Trimethylolpropane → Abietic Acid

참여 물질

반응 조건

반응 단계

5 10.26 kg of Portuguese balsam resin WW 4.02 kg of trimethylolpropane and 0.007 kg of toluhydroquinone were weighed into a 15 liter stirred tank equipped with a distillation attachment and nitrogen (30 to 40 l/h) was passed over the mixture for 30 minutes. The stream of nitrogen was reduced to 8 to 10 l/h and the mixture was heated to 120 to 130° C. When the resin had melted, the stirrer Incas switched on. The reaction mixture was subsequently heated to 140° C. over a period of 2 h, and then maintain the following temperatures: 1 h at 140° C., 1 h at 150° C. 1 h at 160° C., 1 h at 170° C., 1 h at 180° C., 1 h at 200° C. and I h at 220° C. The stream of nitrogen was then increased to 20 l/h and the reaction mixture was heated to 230° C. and stirred at this temperature until the acid number was less than 10 mg KOH per g substance.

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