| 摘要 |
PCT No. PCT/GB91/00752 Sec. 371 Date May 15, 1993 Sec. 102(e) Date May 15, 1993 PCT Filed May 13, 1991 PCT Pub. No. WO92/20421 PCT Pub. Date Nov. 26, 1992.In the vacuum filtering of coal slurries, dewatering of the filter cake is achieved by contacting the coal with a C8 to C20 aliphatic carboxylic acid or a derivative thereof, especially sodium oleate. Reductions in moisture levels are thereby achieved in a cost-effective manner.
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