Double metal complex catalyst and its prepn
A bimetallic complexation and catalyst technology, which is applied in the field of low unsaturation polyether polyols, can solve the problems of large content of by-products, long refining time, poor quality of polyether polyols, etc., and achieve stable polymerization process and excellent preparation process Simple, good product quality
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Embodiment 1
[0030] ① Dissolve 80g of zinc chloride in 120ml of deionized water;
[0031] ②Dissolve 32g of tripotassium hexacyanocobaltate in 600ml of deionized water;
[0032] ③In a three-necked flask, stir and mix the zinc chloride solution and the tripotassium hexacyanocobaltate solution, then add 1000ml of the prepared alcohol-water mixture (500ml deionized water, 350ml tert-butanol and 150ml tert-amyl alcohol), in Complexation reaction was carried out at 30°C for 15 minutes; then
[0033] ④Add 8g of aziridine compound I, stir for 5min and then centrifugally filter;
[0034] ⑤ uniformly disperse the obtained filter cake in a mixed solution made of 300ml deionized water, 490ml tert-butanol and 210ml tert-amyl alcohol, then add 8g aziridine compound I, stir for 5min, and centrifugally filter;
[0035] 6. Disperse the obtained filter cake uniformly again in the diol mixture of 700ml tert-butanol and 300ml tert-amyl alcohol, add 4g aziridine compound I again, stir for 5min, and centrifug...
Embodiment 2
[0041] ①Dissolve 20g of zinc chloride in 150ml of deionized water;
[0042] ②Dissolve 8g of tripotassium hexacyanocobaltate in 30ml of deionized water;
[0043] ③ After mixing ① and ② evenly, add 300ml of alcohol-water mixture (125ml of deionized water, 62.5ml of tert-butanol, 62.5ml of tert-amyl alcohol) and carry out complexation reaction at 35°C for 25min; then
[0044] ④Add 2g of aziridine compound II, continue to stir for 5min, and vacuum filter;
[0045] ⑤ Evenly disperse the obtained filter cake in the alcohol-water mixture (75ml of deionized water, 87.5ml of tert-butanol and 87.5ml of tert-amyl alcohol), then add 2g of aziridine compound II, continue to stir for 5min, and vacuum filter ;
[0046] ⑥ Disperse the obtained filter cake uniformly again in the diol mixture prepared by 125ml of tert-butanol and equal volume of tert-amyl alcohol, add 1g of aziridine compound II again, continue to stir for 5min, and vacuum filter;
[0047] ⑦The obtained filter cake was place...
Embodiment 3
[0052] 1. and 2. with embodiment 2;
[0053] ③ After mixing ① and ② evenly, add 300ml of alcohol-water mixture (125ml of deionized water, 62.5ml of tert-butanol, 62.5ml of n-butanol) and carry out complexation reaction at 45°C for 20min; then
[0054] ④Add 2g of aziridine compound II, continue to stir for 5min, and vacuum filter;
[0055] ⑤ Disperse the obtained filter cake evenly in the alcohol-water mixture (75ml of deionized water, 87.5ml of tert-butanol and 87.5ml of n-butanol), then add 2g of aziridine compound II, continue to stir for 5min, and vacuum filter;
[0056] ⑥ Disperse the obtained filter cake evenly in the diol mixture (125ml of tert-butanol and an equal volume of n-butanol), add 1g of aziridine compound II again, continue to stir for 5min, and vacuum filter;
[0057] ⑦The obtained filter cake was placed in a vacuum dryer, dried at room temperature and 0.01 MPa for 3 hours, crushed and sieved to obtain 14 g of DMC (C).
[0058] The zinc content is 22.1%, and...
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