Method for directly recovering lead oxide used for a lead-acid battery cathode from waste lead paste

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United States of America Patent

PATENT NO 9828654
SERIAL NO

14906452

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Abstract

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Provided is a method for directly recovering lead oxide used for a lead-acid battery negative electrode from waste lead paste. The method comprises: (1) contacting waste lead paste with a barium-containing desulphurizer under desulphurization reaction conditions, and performing a solid-liquid separation on the mixture after contacting to obtain a filtrate and a filtration residue; and (2) performing a conversion reaction on the above-mentioned filtration residue at a temperature of 350-750° C. so as to convert the lead-containing components in the filtration residue into lead oxide. In the method, the direct recovery of a lead oxide raw material applicable to a lead-acid battery negative electrode from waste lead paste is achieved by quantitatively replenishing a barium sulphate additive in the process of desulphuration thereby substantially decreasing the recovery cost and energy consumption, and improving the comprehensive utilization of waste lead paste.

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Patent Owner(s)

Patent OwnerAddress
BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY100029 NO 15 EAST THIRD RING ROAD CHAOYANG DISTRICT BEIJING BEIJING CITY BEIJING CITY 100029

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cai, Xiaoxiang Changxing, CN 3 2
Cao, Guoqing Changxing, CN 36 159
Chen, Tixian Changxing, CN 3 3
Liu, Xiaowei Changxing, CN 78 877
Ma, Yongquan Changxing, CN 2 2
Niu, Yinjian Changxing, CN 3 3
Pan, Junqing Changxing, CN 5 3
Song, Shuang Changxing, CN 16 17
Sun, Yanzhi Changxing, CN 5 3
Yang, Xinxin Changxing, CN 12 5
Yang, Yunfei Changxing, CN 4 14
Zhou, Longrui Changxing, CN 2 2
Zhou, Mingming Changxing, CN 9 108

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