低級オレフィンのオキシド, グリコールおよびポリグリコールの製造に関する研究 (第9報) : ポリグリコールの中規模試験

概要

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The heat of combustion of many polyethers was measured and the heat of polymerisation of propylene oxide was calculated from the data. In manufacturing polyglycols on prepilot scale, 20l autoclave heated by electricity or by steam, 280l autoclave and 20l tubular and circulating type reactor cooled by the cascade of boiling liquid were used. The heat balance obtained in 20l autoclave experiments were also studied and found that the heat of polymerisation of propylene oxide is 25 cal per mol. Further investigations were made on the distribution of molecular weight of each polyglycol prepared with prepilot apparatus by fractionation, and it was made clear that the polymers by the tubular reactor indicated the sharpest distribution of molecular weight among them.