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Jiang B.,Tianjin University | Liu Y.,Tianjin University | Zhang L.,Tianjin University | Sun Y.,Tianjin University | And 2 more authors.
Journal of the Chemical Society of Pakistan | Year: 2014

This study was done to obtain concentrated unsaturated fatty acid methyl esters (FAME) by urea complexation from soybean derived FAME. Effects of urea-to-FAME ratio, 95% ethanol-to-FAME ratio, crystallization temperature and time on the purification of unsaturated FAME were investigated through single factor experiments. Optimum conditions to obtain maximum FAME yield of NUCF with the purity of unsaturated FAME greater than 98% were established using Box-Behnken design (BBD) method and response surface methodology (RSM). Under optimal conditions, the FAME yield was 58.08%, and the purity of unsaturated FAME was 98% at a urea-to-FAME ratio of 1.23, 95% ethanol-to-FAME ratio of 7 and crystallization temperature of 0°C. Verification results revealed that the predicted values were reasonably close to experimentally observed values of 56.93% and 98.01%.

Shi Z.-Q.,Peiyang National Distillation Technology Corporation Ltd Co.
Xiandai Huagong/Modern Chemical Industry | Year: 2015

The design and simulation for distillation process of crude pentachloropropane system are carried out by using Aspen Plus software. The optimal operation parameters such as the reflux ratio and theoretical stages are obtained. The rigorous module of RadFrac is applied to validate this process. The sensitivity of the related operation parameters is also analyzed. The results show that the mass fraction of pentachloropropane can achieve 99.5% and the recovery rate can also be above 99.0%, which meet the requirement of separation process. © 2015, China National Chemical Information Center. All right reserved.

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