引用本文:
王慎敏, 周群, 乔英杰. 低硫可膨胀石墨制备新工艺[J]. 应用化学,
2000, 17(1): 93-95.
Citation: WANG Shen-Min, ZHOU Qun, QIAO Ying-Jie. A New Technology for Preparation of Low-Surphur Expandable Graphite[J]. Chinese Journal of Applied Chemistry, 2000, 17(1): 93-95.
Citation: WANG Shen-Min, ZHOU Qun, QIAO Ying-Jie. A New Technology for Preparation of Low-Surphur Expandable Graphite[J]. Chinese Journal of Applied Chemistry, 2000, 17(1): 93-95.
低硫可膨胀石墨制备新工艺
English
A New Technology for Preparation of Low-Surphur Expandable Graphite
Abstract:
A new technology including semisolid phase maceration for preparation of low surphur expandable graphite is presented, in which potassium permanganate and concentrated sulphuric acid are adopted as blended oxidants and ferric trichlo ride as an inserting agent. The optimum conditions of the process are as follows: mass ratio of graphite to sulfuric acid, potassium permang anate and ferric trichlo ride=1.0:3.0:0.8:0.2; reaction tem perature and time: 50℃ and 1 h. The expandable graphite has an expanded volume of 230 mL/g and S content of 0.48%. By treating the product with sucrose bo rate solution and heating the flexible graphite plates also have been obtained with tensile strength of 7.5 MPa and oxidation loss of 11%. It is a green technology.
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Key words:
- low-sulphur expandable graphite
- / preparation
- / sealing material
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