公开(公告)号：US20180237371A1

公开(公告)日：2018-08-23

申请号：US15548100

申请日：2016-12-07

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Jing LIANG ,  Huihui YANG ,  Xianyong WEI ,  Zhimin ZONG

IPC: C07C51/21 ,  B01J31/02

CPC classification number: C07C51/21 ,  B01J31/0237 ,  B01J31/0247 ,  B01J31/0249 ,  B01J31/04 ,  B01J2231/70 ,  C07C51/27 ,  C07C53/02 ,  C07C53/08 ,  C07C55/06 ,  C07C55/08 ,  C07C59/19 ,  C07C63/06

Abstract: Disclosed is a method of catalytic oxidation of lignite using oxygen as an oxidant at atmospheric pressure, belonging to a method of mild oxidation of lignite. The method is used to mildly oxidize the lignite using the oxygen as the oxidant under the action of a nitroxide radical catalyst and a metal salt or metal oxide cocatalyst; the process comprises the following steps: pulverizing the lignite to 200 meshes or less, drying a pulverized coal sample at a temperature of 80° C. in vacuum for 10 h, weighing 0.5 g of the treated coal sample, sequentially adding 10 ml of acetic acid, 0.5 mmol of a catalyst and 0.15 to 0.25 mmol of a cocatalyst into a round-bottom flask, connecting a tee joint to an upper orifice of a condenser pipe, replacing oxygen in vacuum for three times so that the round-bottom flask is filled with the oxygen, keeping oxygen pressure at 0.1 MPa, reacting at a temperature of 80° C. to 120° C. for 4 to 12 h; filtering after the reaction is finished; decompressing a filtrate to remove the acetic acid, adding a small amount of ethyl acetate to dissolve, then using an excess CH2N2/ether solution to esterify for 10 h at room temperature, using 0.45 μm filter paper to filter, and analyzing an esterified product through a gas chromatography-mass spectrometer. The method has the advantages of using the oxygen as the oxidant, having low price, having no toxicity, and achieving environmental protection and mild conditions.