新型复配漆蜡的加氢工艺及性能研究
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摘要
针对漆蜡的加氢工艺和复配漆蜡的复配加氢工艺进行研究。结果表明,在钯碳催化剂用量0. 5%、氢气压力0. 3 MPa、反应时间2 h、反应温度150℃、转速500 r/min的条件下,加氢后漆蜡中硬脂酸相对含量提高到23. 89%,熔点由49. 6℃上升到50. 9～52. 6℃。在相同的加氢条件下,将加氢后的漆蜡与LH蜡(精制乌桕蜡)按复配比1∶1进行复配加氢,得到硬脂酸含量为17. 48%的新型复配漆蜡,接近日本精制白蜡中硬脂酸含量17. 60%。由于LH蜡的市场价格远低于漆蜡的市场价格,能够降低生产成本,因而这种新型复配漆蜡有很好的发展前景和市场竞争力。
The hydrogenation process of lacquer wax and compound lacquer wax were studied. The results showed that the optimal hydrogenation conditions were obtained as follows: dosage of catalyst palladium carbon 0. 5%,hydrogen pressure 0. 3 MPa,reaction time 2 h,reaction temperature 150 ℃ and stirring speed 500 r/min. Under these conditions,the relative content of stearic acid of hydrogenated lacquer wax reached 23. 89%,and the melting point increased from 49. 6 ℃ to 50. 9-52. 6 ℃. The hydrogenated lacquer wax and LH wax( refined sapium wax) were compounded in the ratio of 1∶ 1 and hydrogenated under the same hydrogenation conditions,and the relative content of stearic acid in the novel compound lacquer wax was 17. 48%,which was close to 17. 60% of the Japanese wax. Considering that the price of LH wax was cheaper than that of lacquer wax,the compound wax had great development prospect and competitive in the market.
The hydrogenation process of lacquer wax and compound lacquer wax were studied. The results showed that the optimal hydrogenation conditions were obtained as follows: dosage of catalyst palladium carbon 0. 5%,hydrogen pressure 0. 3 MPa,reaction time 2 h,reaction temperature 150 ℃ and stirring speed 500 r/min. Under these conditions,the relative content of stearic acid of hydrogenated lacquer wax reached 23. 89%,and the melting point increased from 49. 6 ℃ to 50. 9-52. 6 ℃. The hydrogenated lacquer wax and LH wax( refined sapium wax) were compounded in the ratio of 1∶ 1 and hydrogenated under the same hydrogenation conditions,and the relative content of stearic acid in the novel compound lacquer wax was 17. 48%,which was close to 17. 60% of the Japanese wax. Considering that the price of LH wax was cheaper than that of lacquer wax,the compound wax had great development prospect and competitive in the market.
引文
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[2]张瑞琴,张飞龙.漆树果实资源开发态势分析[J].中国生漆,2000,19(3):23-30.
[3]张飞龙,郭勇智,王尚林,等.漆树资源的开发和利用[J].中国生漆,1995,14(1):42-50.
[4]张均.浅析乌桕的开发利用[J].安徽农业科学,2007,35(9):2603,2696.
[5]吴邦信,陈天祥.乌桕脂脂肪酸提取和分离的研究[J].天津化工,1999(3):15-18.
[6]王海,刘纯山.国内油脂加氢催化剂现状及发展趋势[J].工业催化,2004,12(9):5-8.
[7]FERNNDEZ M B,TONETTO G M,CRAPISTE G H,et al.Hydrogenion of edible oil over Pd catalysts.A combined theoretical and experimental study[J].J Mol Catal A-Chem,2005,237(1/2):67-79.
[8]黄艳鹤,王成章,何源峰.加氢对漆蜡物化性能变化的研究[J].林产化学与工业,2012,32(5):63-68.
[9]储伟.催化剂工程[M].成都:四川大学出版社,2006.
[10]URBANO F J,MARINAS J M.Hydrogenolysis of organohalogen compounds over palladium supported catalysts[J].J Mol Catal A-Chem,2001,173(1/2):329-345.
[11]黄仲涛.工业催化剂手册[M].北京:化学工业出版社,2004:564-567.
[12]NOHAIR B,ESPECEL C,LAFAYE G.et al.Palladium supported catalysts for the selective hydrogenation of sunflower oil[J].J Mol Catal A-Chem,2005,229(1/2):117-126.
[13]RITTER C,MULLER-WARMUTH W,SCHOLLHORNR.Structure and motion of hydrogen in molybdenum bronzes Hx MoO3as studied by nuclear magnetic resonance[J].J Chem Phys,1985,83:6130-6138.