PURPOSE: To decrease the water content in aq. coal slurry and to improve fluidity by adding a compd. which is the formaldehyde condensate of the alkylene oxide addition product of phenols and has specific mol. wts. into the aq. coal slurry.
CONSTITUTION: A compd. which is a formaldehyde condensate of the alkylene oxide addition product of phenols and has ≥1,000mol.wts., more preferably 2,000W50,000mol.wts. is incorporated into aq. coal slurry as an additive for said slurry. The polymeric chain of the alkylene oxide is preferably a block copolymer of propylene oxide and ethylene oxide and the weight ratio between propylene oxide and ethylene oxide is preferably 40/60W10/90. If such additive is added to the aq. coal slurry, the concn. of the pulverized coal in the aq. coal slurry is improved by ≥10W50wt%; furthermore, the sepn. by settling of the pulverized coal is prevented and the fluidity is improved.
IMAMURA TAKEHISA
OGURA YOSHIKAZU
MIZUNO YASUNOBU
HIRAYAMA MASAO
| JPS4823801A | ||||
| JPS5388008A | 1978-08-03 | |||
| JPS57102994A | 1982-06-26 | |||
| JPS559695A | 1980-01-23 | |||
| JPS5662538A | 1981-05-28 | |||
| JPS5688496A | 1981-07-17 |