Song Kemin, Wang Ling: Process for preparing expandable graphite with high reference expansion temperature. Agricultural University Of Hebei, liu mopei, December 27, 2006: CN200610012936

The invention discloses a preparing method of inflatable graphite with high-starting expanding temperature, which comprises the following steps: immersing natural scale graphite in the sealing agent and sulfuric acid composite liquid; adding oxidant through stirring continuously; decolouring; removi ...

Song Kemin, Lu Wenyi, Gao Shuying: Manufacturing method of low-sulfur expansible black lead. Song Kemin, CHEN JIANMIN, May 10, 1995: CN93119757

The process for preparing expansible graphite with low sulfur content includes immersing natural flaser graphite sequentially in sulfuric acid and soluble peroxydisulfate, centrifugal deacidification, putting in mixture of nitric acid and oxalic acid, washing with water, low-temp. baking until water ...


Song Kemin: Prodn process of no-sulphur expansion graphite. Song Kemin, CHEN JIANMIN, July 9, 1997: CN96122217

Natural flaky graphite is soaked in mixture liquid of nitric acid and organic acid with 4 or below carbon atoms or corresponding acid anhydride and reacted by adding oxidant to produce acid graphite, which is further decolored by adding reductant, centrifugalized to deacidify and dry up to a water c ...


Song Kemin: Vertical seepage-proof engineering quality nondestructive detecting method. Jilin Prov Water Conservancy And Hydropower Survey And Design Inst, ding honghua, October 5, 2005: CN200410010780

The invention discloses a vertical impervious engineering quality non destructive surveying technique. Arrange two arrays of electric pole along the two sides of the impervious film with the line perpendicular to the film, the impervious film is at the middle point of the intersection. One side is p ...

Wang Ling, Song Kemin, Liu Huimin: Preparation method of expandable graphite with low starting expansion temperature. Agricultural University of Hebei, July 20, 2011: CN201010000588

The invention discloses a preparation method of expandable graphite with a low starting expansion temperature. The method comprises the following steps: soaking natural crystalline flake graphite with nitric acid; adding a stabilizer and then fully stirring; and adding an organic mixed solution with ...