Position: Home > Articles > A new procedure for preparing lower sulfur expandable graphite
Journal of Agricultural University of Hebei
2003,26
(4)
124-126
制备低硫可膨胀石墨的新工艺
作 者：
王玲;宋克敏;翟彤宇;杨丽华
单 位：
河北农业大学理学院
关键词：
低硫可膨胀石墨;98%硫酸;硝酸;草酸
摘 要：
用硫酸(98%)、硝酸(65%)和草酸的混合液与天然鳞片石墨反应制备低硫可膨胀石墨。最佳反应条件是:石墨、硫酸(98%)、硝酸(65%)、草酸的重量比为1∶2 3∶1 7∶0 05,反应时间45min,反应温度为25℃,可膨胀石墨的含硫量为1 63%时,膨胀容积为250mL/g,其终端产品柔性石墨的含硫量为780mg/kg。
译 名：
A new procedure for preparing lower sulfur expandable graphite
作 者：
WANG Ling,SONG Kemin,ZHAI Tongyu,YANG Lihua (College of Science, Agricultural University of Hebei, Baoding 071001, China)
关键词：
low sulfur expandable graphite; preparation; 98% sulfuric acid; 65% nitric acid, oxalic acid
摘 要：
The low sulfur expandable graphite was prepared by reacting natural flake graphite with mixing solution made from sulfuric acid (98%), nitric acid (65%) and oxalic acid. The optimum conditions for the preparation were graphite∶sulfuric acid(98%)∶nitric acid (65%)∶oxalic acid=1∶23∶17∶005 (by weight), 25℃, 45 min. The expandable graphite with expanded volume of 250 ml/g contains only 163% sufur. The end product, flexible graphite contains only 780ppm sulfur.
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