Physical-chemical composite inhibitor for controlling spontaneous combustion of low-rank coal and method of preparing and using same

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United States of America Patent

PATENT NO 10648336
SERIAL NO

16090060

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Disclosed is a physical-chemical composite inhibitor for controlling spontaneous combustion of low-rank coal, and methods of preparing and using the same. The composite inhibitor consists of a chelate and attapulgite, the chelate is generated by chelation of proanthocyanidin with calcium chloride. The composite inhibitor has moisture-absorbing and moisture-retaining effect, and can reduce water dissipation at low temperature. A stable oxide insulating layer such as MgO and Al2O3 insulating layer can be formed at high temperature, which can block a coal body from contacting with oxygen. In addition, the composite inhibitor can capture hydroxyl free radicals generated during the chain-cycle reaction and destroy peroxide free radicals, and can also interact with an active moiety in coal to form a stable structure such as ether linkage and hydrogen bonding, thereby achieving permanent inhibition of low-rank coal.

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Patent Owner(s)

Patent OwnerAddress
CHINA UNIVERSITY OF MINING AND TECHNOLOGYCHINA UNIVERSITY OF MINING AND TECHNOLOGY NO 1 DAXUE ROAD XUZHOU CITY JIANGSU PROVINCE 221116 XUZHOU CITY JIANGSU PROVINCE 221116

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Qin, Botao Jiangsu, CN 6 20
Wang, Feng Jiangsu, CN 857 9908
Xia, Chen Xuzhou, CN 16 35
Zhong, Xiaoxing Jiangsu, CN 4 6

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