One-pot synthesis of fuel precursor from acetoin fermentation broth using ionic liquid-based salting-out extraction system

Table 1 Results of the reaction between acetoin and 5-MF in different SOE systems

	System		Conversion of 5-MF (%)	C10 products		Phase split
	System		Conversion of 5-MF (%)	Selectivity (%)	Yield (%)	Mixture without 5-MF	After reaction*
1	EOAB	–	23.2 ± 0.3	98.9 ± 1.0	23.1 ± 0.5	H	TLP^b
2	–	K₃PO₄	84.3 ± 1.2	51.2 ± 0.1	42.8 ± 0.1	AT	TLP^a
3	EOAB	K₃PO₄	98.4 ± 0.3	9.0 ± 0.5	8.9 ± 0.6	AT	TRP
4	–	K₂CO₃	73.7 ± 1.3	55.9 ± 0.1	41.3 ± 0.8	AT	TLP^a
5	EOAB	K₂CO₃	88.2 ± 0.1	7.3 ± 0.3	6.4 ± 0.3	AT	TRP
6	–	K₄P₂O₇	23.2 ± 2.1	94.6 ± 0.2	22.0 ± 2.0	AT	TLP^a
7	EOAB	K₄P₂O₇	93.5 ± 0.3	48.6 ± 1.2	45.4 ± 0.4	AT	TRP
8	–	K₂HPO₄	6.53 ± 0.0	93.2 ± 0.1	6.08 ± 0.01	AT	TLP^a
9	EOAB	K₂HPO₄	97.9 ± 0.1	67.1 ± 0.2	65.8 ± 0.1	AT	TRP
10	–	CH₃COOK	7.56 ± 0.8	0	0	H	H
11	EOAB	CH₃COOK	63.7 ± 2.4	81.1 ± 0.4	55.2 ± 1.6	H	TLP^b

^*The reaction system was composed of 10 mL aqueous solution of acetoin and 2,3-BD, 0.04 mol salt and/without 1.1 g EOAB, and carried out at 37 °C and 200 rpm for 18 h
H homogeneous, AT aqueous two-phase, TLP^a two liquid phases where the top liquid phase was the C₁₀ products, TLP^b two liquid phases where the bottom liquid phase was the C₁₀ products, TRP three phases, where the liquid of C₁₀ products accumulated at the interface of two aqueous phases and the top phase was rich in EOAB and 2,3-BD

ISSN: 2731-3654