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  • [发明专利]US19740468315 _ SUN OIL COMPANY (DELAWARE) 1974年05月09日
    A process for drying lignitic and subbituminous coal containing from about 25 to about 40% by weight water which comprises heating said coal with a fluidizing combustion gas stream containing from about 7 to about 9% by volume of oxygen to reduce the ...
  • [发明专利]US19740522098 _ RHEINISCHE BRAUNKOHLENWERKE AG 1974年11月08日
    A process of manufacturing briquettes from brown coal includes drying brown coal, which is preferably in fine granular form. The dried brown coal is then heated at a first rate up to a temperature in a range of from about 300 DEG to about 320 DEG C....
  • [发明专利]JP19740080654 _ HIRABAYASHI MASAYA HIRABAYASHI HIROSHI 1974年07月13日
  • [发明专利]GB19740027190 _ SHELL INT RES MS BV 1974年06月19日
    1471949 Upgrading carbonaceous material SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 19 June 1974 27190/74 Heading C5G Coal or the like (defined below) is upgraded by forming a pumpable aqueous dispersion of finely divided coal or the like, pressuriz...
  • [发明专利]SU19742045564 _ INST TORFA AN BELORUSSKOJ SSR 1974年06月28日
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