| 摘要 |
Aqueous coal slurries are prepared using aralkyl polyalkylene glycol ethers of the formula <IMAGE> in which R1 represents an optionally substituted aryl radical, R2 and R3 are identical or different and denote hydrogen, alkyl or optionally substituted aryl, x represents a number in the range from 1 to 3, y represents a number in the range from 1 to 500, and R4 denotes hydrogen or one of the radicals <IMAGE> in which M(+) represents a metal ion or ammonium, R5 denotes hydrogen, alkyl or optionally substituted aryl and R6 denotes hydrogen or alkyl, it being possible for the radicals R6 in the individual chain members of the polyalkylene glycol chain to be identical or different. |
