Studies On High-valued Technology Of Biodiesel From Chinese Kernel Oil

The development of biodiesel industry is seriously hindered by low profit due to the high cost of raw oil. So, an amplified and outspread industrial chain must be carried out to promote the prefitable space of biodiesel, and to obtain permanent economic benefits. In this paper, a series of artifactitious chemicals were investigated on the basis of the structural properties of rich double bond in Chinese kernel oil biodiesel, aiming at exploring a practical and feasible way of high value-added biodiesel. The main experimental results are listed as follows:1. High value-added Dimeric fatty acid methyl ester for wide industrial application from Chinese kernel oil biodiesel prepared by lipase was prepared. The productive process of polyamide based on the dimeric acid methyl ester has been explored. We optimized the reaction conditions and the optimum results were: multivariate amine is triethylenetetramine, amine/acid molar ratio 4:1,reaction temperature 220°C,reaction time 4 h . Under these conditions,the performance of polyamide is comparable to the similar product of first class TY-651 available commercially.2. The application of polyamide in epoxy resin curing process were further studied. It is revealed that the optimal properties of cured resin was obtained in following conditions: percent of polyamide 20% (based on the weight of F-51 poxy resin), reaction temperature 110°C, curing time 24 h. The best performance are: thermogravimetic temperature 363.89°C, glass-rubber transition temperature 92.20°C, tensile-strength 63.55 MPa, bending-strength 118.43 MPa, impact-strength 7.03 kJ/m~2. Compared with the similar product, polyamide resin prepared myself have more preferable functions, which implied a better industrial application of my polyamide resin products3. Employing stannous octoate as catalyst, polyester-diol for polyurethane was synthesized based on the dimeric acid methyl ester and ethylene glycol. The optimum synthetic conditions were gained by single factorial experiments, and they are: DAM/EG molar ratio 1:2.6,catalyst loading 0.35%( w /wDAM + EG), reaction temperature 180°C, reaction 4 h, and then vacuum distillation at 130°C for 3 h. Under these conditions, the polyester-diol yield of 98.73% was obtained, with the acid and hydroxyl value of which were 0.33 mgKOH/g and 84.5 mgKOH/g. Then, we have also attempted to prepare polyester-diol by biological method using lipase as catalyst, and found that the Novo435 lipase could catalyze the reaction effectively by polymerization and transesterification with the yield of polyester-diol up to 94.45%.4. Taking a assembly line annually outputing biodiesel of 50,000 tons for example, we preliminarily estimated its economic benefits of pure biodiesel industry and high value-added industry, respectively. The results showed that the high value-added products based on biodiesel have more profitable space.