Depolymerization of Rice Straw Lignin into Value-Added Chemicals in Sub-Supercritical Ethanol

Table 3

The obtained compounds in straw-derived lignin depolymerization in conditions of 50% ethanol, 275°C, 30 min, 75 : 1 (mL ethanol: 1 g lignin).

No	Compounds	RT	%Area
1	Phenol	6.843	3.59
2	(E)-3-Tridecen-1-yne	6.860	2.35
3	1-[4-Hydroxy-3-(2-hydroxyethyl)phenyl]ethanone	6.968	7.14
4	2,3-Dihydroxybenzoic acid	8.931	8.02
5	2-Ethylphenol	8.954	8.29
6	2-O-(2,2-Dimethylpropyl)-1-O-hexyl oxalate	8.977	9.67
7	3,6-Dimethyl-6-octen-3-ol	9.766	5.63
8	3,7-Dimethyldecane	19.110	8.83
9	3-Ethylphenol	19.442	5.47
10	Methyl 2,4,6-trimethylbenzoate	24.300	3.66
11	Carvacrol	31.235	5.36

RT: retention time (min). Total area was obtained based on the integration of 11 major peaks, without including the small peaks with %Area < 1.5.