was completed 25 ml glyme were added and the mixture stirred for one hour the catalyst was collected by filtration in a 6 5 cm diameter fritted filter funnel washed 3 times with 70 ml 30 glyme and twice with 70 ml 90 glyme filtration required about 50 minutes and the filtrate was only slightly cloudy the filter cake was air dried crushed and dried 18 hours at 0 1 mm pressure 25 u00b0 c to yield 29 85 g powder containing 1 3 co 3 1 zn and 0 012 k a one liter stirred autoclave was charged with 2 23 g catalyst from a above 21 5 g propoxylated trimethylolpropane 470 mw 110 ml of tetrahydrofuran and 32 g propylene oxide po a pressure drop was observed shortly after heating the mixture to 90 u00b0 c another 523 g of po was added over 6 hours the analytical data obtained for the final product after removal of solvent are shown in table i a solution of 134 46 g 405 mmole potassium hexacyanocobaltate in 3240 ml water was added slowly with mixing to 123 77 g 908 mmole zinc chloride in 975 ml water after addition was completed 2 5 hours 820 ml glyme were added and the mixture stirred for 3 more hours.