| 单词 | frasch, herman |
| 释义 | Frasch, HermanFrasch, Herman(1851–1914) chemist, engineer; born in Gaildorf, Germany. Emigrating to America in 1868, he discovered a new way of refining paraffin in 1876. Between 1885–94 he developed a desulfurization process for petroleum. He made other important discoveries, notably a method for mining sulfur directly by injecting superheated water into the mine. His own Union Sulfur Company led the U.S.A. to become a major exporter of sulfur. |
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