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Title:
LARGE-SCALE CLEAN PREPARATION METHOD FOR GRAPHENE
Document Type and Number:
WIPO Patent Application WO/2017/190570
Kind Code:
A1
Abstract:
Provided is a large-scale clean preparation method for graphene, comprising: (i) preparing graphite raw material, water, foaming agent and surfactant into a suspension and stirring the suspension at a rotating speed of 300-500rpm to disperse the graphite raw material uniformly to obtain a dispersed suspension; (ii) feeding the dispersed suspension into a feed inlet (1) of a spraying device, the feed inlet communicating with a conveying chamber (2), the conveying chamber being internally provided with at least one ultrasonic probe (5); the dispersed suspension being subjected to ultrasonic treatment so that the foaming agent enters layers of graphite; the conveying chamber being internally provided with at least one air compressor (4) for pressurizing the dispersed suspension to accelerate the dispersed suspension to flow forward; the conveying chamber communicating with a drying chamber (3), and the dispersed suspension after treatment flowing into the drying chamber; and (iii) arranging a gas heating nozzle and at least one nozzle (7) at the top of the drying chamber; the dispersed suspension flowing through the nozzle and entering the drying chamber to be atomized by heated gas; the foaming agent being decomposed by heat so that interlayer spacing of graphite is increased; and after atomization and foaming, obtaining the graphene stripped off under a high-speed air flow. Preferably, at least one ultrasonic probe (6) is arranged at the nozzle. According to the method, two processes, i.e., mechanical stripping and drying, are integrated into a spray dryer and an ultrasonic device is arranged at the nozzle, thus providing graphite with a higher energy, increase the intercalating probability and improving the intercalating effect of the foaming agent. Hence, product quality is ensured and, environmental protection and no-pollution are achieved.

Inventors:
CHEN, Qing (LIN Xianli, No.4. Donghai Road Jiaolong Industrial Estate, Qingyang Distric, Chengdu Sichuan 1, 610091, CN)
ZENG, Juntang (LIN Xianli, No.4. Donghai Road Jiaolong Industrial Estate, Qingyang Distric, Chengdu Sichuan 1, 610091, CN)
LIAO, Daying (LIN Xianli, No.4. Donghai Road Jiaolong Industrial Estate, Qingyang Distric, Chengdu Sichuan 1, 610091, CN)
CHEN, Bing (LIN Xianli, No.4. Donghai Road Jiaolong Industrial Estate, Qingyang Distric, Chengdu Sichuan 1, 610091, CN)
Application Number:
CN2017/078376
Publication Date:
November 09, 2017
Filing Date:
March 28, 2017
Export Citation:
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Assignee:
CHENDU NEW KELI CHEMICAL SCIENCE CO., LTD. CHINA (LIN Xianli, No.4. Donghai Road Jiaolong Industrial Estate, Qingyang Distric, Chengdu Sichuan 1, 610091, CN)
International Classes:
C01B32/19
Foreign References:
CN105819437A2016-08-03
CN103880002A2014-06-25
CN105366671A2016-03-02
US20140079932A12014-03-20
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