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Bioresour Technol. 2019 Feb;273:677-681. doi: 10.1016/j.biortech.2018.11.047. Epub 2018 Nov 13.

Bifunctional and recyclable Dawson-type polyoxometalates catalyze oxidative degradation of lignocellulose to selectively produce phthalates.

Author information

1
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong 266580, China.
2
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong 266580, China. Electronic address: Liudong@upc.edu.cn.
3
College of Science, China University of Petroleum, Qingdao, Shandong 266580, China.

Abstract

Acid-redox bifunctional Dawson-type polyoxometalates K6P2W18O62 (P2W18) and K10P2W17O61 (P2W17) were introduced as the new-type catalysts in oxidative decomposition of lignocellulose. The lignin and hemicellulose ingredients of lignocellulose could be decomposed by P2W17 to produce diisobutyl phthalate with the selectivity of 75.67% and other aromatic and aliphatic compounds under mild conditions, evidently differed from other POMs-catalyzed lignocellulose depolymerization in which aromatic ketones and phenols were the main compounds. Diisobutyl phthalate was obtained from the oxidation of Cα-OR and α-OH of the phenyl structure. The catalyst could be recycled for three times without obvious deactivation. This is the first report of lignocellulose decomposition catalyzed by Dawson-type polyoxometalates to selectively produce phthalates.

KEYWORDS:

Catalysis; Lignocellulose; Oxidative decomposition; Polyoxometalates; Recycle

PMID:
30472040
DOI:
10.1016/j.biortech.2018.11.047
[Indexed for MEDLINE]

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