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bce ›› 2017, Vol. 51 ›› Issue (5): 1-6.doi: 10.3969/j.issn.1673-5854.2017.05.001

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Synthesis of Renewable Bio-diesel Precursors with Angelica Lactone and 2-Methylfuran

WANG Wei1,2, JI Xiaohui1, GE Hongguang1, LI Zhizhou1, SHAO Xianzhao1, ZHANG Qiang1   

  1. 1. School of Chemistry and Environment Science, Shaanxi University of Technology, Hanzhong 723001, China;
    2. Shaanxi Key Laboratory of Catalysis, Shaanxi Province, Hanzhong 723001, China
  • Received:2017-02-28 Online:2017-09-30 Published:2017-09-30

Abstract: Hydroxylalkylation/alkylation of angelica lactone and 2-methylfuran derived from biomass was processed with heteropoly acid as catalyst to obtained 4,4-bis(5-methylfuran-2-yl)pentanoic acid. Renewable bio-diesel precursors, 4,4-bis(5-methyl-tetrahydrofuran-2-yl)pentan-1-ol and bis(5-methyl-tetrahydrofuran-2-yl)ethane, were produced by hydrogenation of the 4,4-bis(5-methylfuran-2-yl)pentanoic acid. First of all, the effects of silicotungstic acid, phosphomolybdic acid and silicomolybdic acid catalyst on hydroxylalkylation/alkylation yield were studied. Reaction temperature, catalyst dosage and reaction time were optimized. The yield of 4,4-bis(5-methylfuran-2-yl)pentanoic acid reached 70.5% under the reaction temperature 60 ℃, the dosage of silicotungstic acid 0.05 g, and the reaction time 60 min. Afterwards, the hydrogenation of hydroxylalkylation/alkylation product of angelica lactone and 2-methylfuran on the Pd/C, Ru/C and Pt/C catalyst was also investigated. Ru/C catalyst showed the best activity and selectivity. Yields of 4,4-bis(5-methyl-tetrahydrofuran-2-yl)pentan-1-ol and bis(5-methyl-tetrahydrofuran-2-yl)ethane were 60.5% and 24.6%, respectively. Finally, the stability of Ru/C catalyst was investigated, and the reaction time of 24 h showed good stability. The obtained mixture of 4,4-bis(5-methyl-tetrahydrofuran-2-yl)pentan-1-ol and bis(5-methyl-tetrahydrofuran-2-yl)ethane can be used as bio-diesel precursors.

Key words: hydroxylalkylation/alkylation, hydrogenation, bio-diesel precursors, angelica lactone, 2-methylfuran

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