Recovery of valeric acid using green solvents,The Canadian Journal of Chemical Engineering

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Recovery of valeric acid using green solvents
The Canadian Journal of Chemical Engineering ( IF 1.6 ) Pub Date : 2022-07-15 , DOI: 10.1002/cjce.24552
Sourav Mukherjee ₁ , Basudeb Munshi ₁

Affiliation

In this work, extraction of valeric acid (VA) using tri-n-butyl phosphate (TBP) as a reactive extractant was carried out. To reduce the toxic effects of the conventional diluents on microorganisms, non-toxic and green edible sunflower and soybean oils were tried as the diluents. The high values of the distribution coefficient and extraction efficiency advocated to use them in the bio-refinery industries. Moreover, it shows intensification of the recovery of VA using reactive extraction process. Sunflower oil appeared to be a better diluent than soybean oil. The complexation reaction stoichiometry (m and n) and equilibrium complexation reaction constant

◂◽.▸ K_{E (m : n)}

were estimated by using the differential evolution technique. In spite of the loading ratio being less than 0.5, the estimated m/n was found to be more than 1.0. The higher values of

◂◽.▸ K_{E (m : n)}

occurred due to the 9higher stability of the VA-TBP complex in sunflower oil than in soybean oil. The stoichiometry of VA decreased with increasing TBP concentration. The complex concentration,

◂◽.▸ {[◂◽.▸ {(HA)}_{m} S_{n}]}_{org}

, was found to be higher for soybean oil. It increased with temperature and initial VA concentration but remained invariant with TBP concentration. Due to the decreasing trend of

◂◽.▸ K_{E (m : n)}

with temperature, the complexation reaction became exothermic. The enthalpy changes due to mass transfer stipulated easier mixing of the phases in sunflower oil than in soybean oil.

中文翻译：

使用绿色溶剂回收戊酸

在这项工作中，使用磷酸三正丁酯 (TBP) 作为活性萃取剂萃取戊酸 (VA) 。为降低常规稀释剂对微生物的毒害作用，尝试采用无毒绿色食用葵花籽油和大豆油作为稀释剂。分配系数和提取效率的高值提倡在生物精炼工业中使用它们。此外，它显示了使用反应萃取工艺回收 VA 的强化。向日葵油似乎是比大豆油更好的稀释剂。络合反应化学计量（m和n）和平衡络合反应常数