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DE517317C
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Process for splitting and liquefying coal
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DE516993C
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Apparatus for working with hot hydrogen under pressure
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DE482412C
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Extraction of highly active coal
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DE483634C
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Process for mining coal
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DE494214C
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Process for the separation of insoluble impurities from the process of coal mining
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DE494213C
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Process for the continuous extraction of oil from coal
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DE501689C
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Process for increasing the partial pressure of hydrogen when hydrogenating coal and hydrocarbons under high pressure and high temperature
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DE469867C
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Process for splitting or hydrogenating coal and hydrocarbons by heating under high hydrogen pressure
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DE446268C
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Method for pressing paste-like masses into high pressure rooms
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DE490636C
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Process for hydrogenating and splitting coal and hydrocarbons by heating under hydrogen pressure
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DE490562C
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High pressure line with adjustable flow cross-section
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