用玉米芯、稻壳混合原料生产糠醛的中试工艺研究

Pilot process of furfural produced with mixed corncob and rice husk

以玉米芯+稻壳(1∶1)为原料,采用二步水解法在中试规模下进行糠醛生产工艺技术试验研究,系统考察了酸浓度质量分数、水解时间、固液比、压力4个工艺条件对产醛率的影响,并继续按4因素4水平进行L16(45)工艺条件正交优化试验。中试条件下制备糠醛的最适工艺条件为:酸浓度质量分数4%,水解时间180 min,固液比1∶0.5,压力0.9 MPa,最大产醛率可达9.30%。试验结果充分说明,在我国南方地区用稻壳部分替代玉米芯原料生产糠醛是完全可行的,这为我国南方糠醛企业实现大规模生产提供重要的技术和工艺依据。

The purpose of these experiments were to study the pilot production procedure of furfural. The furfural was made from corncob and rice husk, and the proportion of corncob to rice husk was 1 to 1. In order to get the optimal levels of the influence factors including acid concentration, hydrolysis time, solid-liquid ratio and pressure, the singlefactor experiments were carried out. With the optimal levels of the four influence factors, the orthogonal experiments were designed. The results show that： under the conditions of acid concentration （4%）, hydrolysis time 180 minutes, solid-liquid ratio 1 ： 0, 5, and pressure 0. 9 MPa, the yield of furfural reached as high as 9. 296 2%. It is feasible to use rice husk instead of corncob to produce furfural, which provides technology and technology basis for producing furiural in southern China enterprise.