Preparation and bleaching of rubber seed oil biodiesel catalyzed by sulphuric acid
The preparation technology of rubber seed oil biodiesel using sulphuric acid as catalyst was studied by orthogonal experiment, and the effect of bleaching conditions of activated clay on the bleaching rate of the biodiesel was studied.The results indicated that the optimal preparation conditions of rubber seed oil biodiesel were as follows:molar ratio of methanol to rubber seed oil 20∶ 1, catalyst dosage 2％(based on rubber seed oil mass), reaction time 8 h, reaction temperature 65 ℃, and 83.16％ of transesterification rate was obtained under the conditions.The optimal bleaching conditions were as follows:activated clay dosage 7％ (based on biodiesel mass), bleaching time 30 min, bleaching temperature 80 ℃.Under the optimal conditions, the bleaching rate of the biodiesel could be up to 75.65 ％.
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