Oil was extracted from seeds of Jatropha Curcas,in high yields(up to 40% by weight).The extracted Jatropha oil was converted in a laboratory reactor to biodiesel by transesterification.Analysis of Jatropha oil and Jat...Oil was extracted from seeds of Jatropha Curcas,in high yields(up to 40% by weight).The extracted Jatropha oil was converted in a laboratory reactor to biodiesel by transesterification.Analysis of Jatropha oil and Jatropha biodiesel by GC/MS and GC/SIMDIS showed that Jatropha oil could be readily converted to a biodiesel product through NaOH catalyzed transesterification.The resulting biodiesel has desirable properties such as high cetane number and low flash point,which are major improvements over the properties of commercial biodiesel fuels.展开更多
以棉籽油脂肪酸与甲醇为原料,采用超临界甲醇非催化法制备生物柴油。考察了反应温度、反应时间、脂肪酸与甲醇体积比对产物中亚油酸、油酸、亚油酸甲酯和油酸甲酯含量的影响。结果表明,产物中亚油酸甲酯和油酸甲酯在反应温度超过280℃...以棉籽油脂肪酸与甲醇为原料,采用超临界甲醇非催化法制备生物柴油。考察了反应温度、反应时间、脂肪酸与甲醇体积比对产物中亚油酸、油酸、亚油酸甲酯和油酸甲酯含量的影响。结果表明,产物中亚油酸甲酯和油酸甲酯在反应温度超过280℃后呈下降趋势;反应时间超过15 m in后有降低趋势;脂肪酸与甲醇体积比超过1∶3后呈降低趋势。说明在超临界甲醇法制备生物柴油过程中反应温度不宜太高,反应时间不宜过长。展开更多
Cottonseed as raw material was processed by two-phase solvent extraction.Non-toxic crude protein was produced, and at the same time the nonpolar solution containing high quality crude cottonseed oil was used for trans...Cottonseed as raw material was processed by two-phase solvent extraction.Non-toxic crude protein was produced, and at the same time the nonpolar solution containing high quality crude cottonseed oil was used for transesterification reaction with methanol to produce fatty acid ester and glycerol.The effect of mass ratio of petroleum ether to crude cottonseed oil on the fatty acid ester content and the quantity of water needed for washing the product were investigated.It was confirmed that the best mass ratio of petroleum ether to crude cottonseed oil was 3.Under this condition, the water consumption was halved.The effect of methanol/oil molar ratio, catalyst amount, reaction temperature and time were also studied.Through orthogonal analysis, the optimum conditions were obtained as follows: the molar ratio of methanol to oil 6∶1, the amount of catalyst 1.1%, reaction temperature 60℃ and reaction time 120 min.The results of parallel tests showed that under such optimum condition the cottonseed oil conversion could reach 97.7%.展开更多
文摘Oil was extracted from seeds of Jatropha Curcas,in high yields(up to 40% by weight).The extracted Jatropha oil was converted in a laboratory reactor to biodiesel by transesterification.Analysis of Jatropha oil and Jatropha biodiesel by GC/MS and GC/SIMDIS showed that Jatropha oil could be readily converted to a biodiesel product through NaOH catalyzed transesterification.The resulting biodiesel has desirable properties such as high cetane number and low flash point,which are major improvements over the properties of commercial biodiesel fuels.
文摘以棉籽油脂肪酸与甲醇为原料,采用超临界甲醇非催化法制备生物柴油。考察了反应温度、反应时间、脂肪酸与甲醇体积比对产物中亚油酸、油酸、亚油酸甲酯和油酸甲酯含量的影响。结果表明,产物中亚油酸甲酯和油酸甲酯在反应温度超过280℃后呈下降趋势;反应时间超过15 m in后有降低趋势;脂肪酸与甲醇体积比超过1∶3后呈降低趋势。说明在超临界甲醇法制备生物柴油过程中反应温度不宜太高,反应时间不宜过长。
文摘Cottonseed as raw material was processed by two-phase solvent extraction.Non-toxic crude protein was produced, and at the same time the nonpolar solution containing high quality crude cottonseed oil was used for transesterification reaction with methanol to produce fatty acid ester and glycerol.The effect of mass ratio of petroleum ether to crude cottonseed oil on the fatty acid ester content and the quantity of water needed for washing the product were investigated.It was confirmed that the best mass ratio of petroleum ether to crude cottonseed oil was 3.Under this condition, the water consumption was halved.The effect of methanol/oil molar ratio, catalyst amount, reaction temperature and time were also studied.Through orthogonal analysis, the optimum conditions were obtained as follows: the molar ratio of methanol to oil 6∶1, the amount of catalyst 1.1%, reaction temperature 60℃ and reaction time 120 min.The results of parallel tests showed that under such optimum condition the cottonseed oil conversion could reach 97.7%.
