Preparation of stable aqueous coal slurry
专利汇可以提供Preparation of stable aqueous coal slurry专利检索，专利查询，专利分析的服务。并且PURPOSE: To stably disperse a coal fine powder and to prevent the formation of a precipitate or a hard cake even during longterm preservation, by a method wherein a polyether compound shown by specific formula is added to the aqueous dispersion of a coarse coal powder and the obtained compound is comminuted and mixed.
CONSTITUTION: A polyether compound shown by formula A[(C
3 H
6 O)
y (C
2 H
4 O)
z ]
x (wherein x is an integer of 2 or more, y and z are an integer of 1 or more, A is residue obtained through the removal of active hydrogen from an x valent active hydrogen compound. The wt. ratio of a polyoxypropylene chain and a polyoxyethylene chain is 50/50W5/95 and M.W. is 3,000W100,000) is added to the aqueous dispersion of a coarse coal powder to carry out crushing and mixing or added to and mixed in the aqueous dispersion prepared by communting said aqueous dispersion of the coarse coal powder. As the active hydrogen compound of the above mentioned polyether compound, for example, there is ethylenediamine or glycerine and the addition amount of the polyether compound is 0.01W 7.5wt% relative to the aqueous dispersion of the coal powder.
COPYRIGHT: (C)1983,JPO&Japio，下面是Preparation of stable aqueous coal slurry专利的具体信息内容。
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