Preparation method of hydroformylation homogeneous complex catalyst
A hydroformylation catalyst, olefin hydroformyl technology, applied in the direction of organic compound/hydride/coordination complex catalyst, carbon monoxide reaction preparation, physical/chemical process catalyst, etc., can solve unfavorable industrial promotion and application, process steps cumbersome and other problems, to achieve the effect of wide application range, simplified process flow and mild process conditions
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[0042] Example 1
[0043] The catalyst waste liquid used is the deactivated catalyst in the process of preparing butyraldehyde by the hydroformylation reaction of propylene, carbon monoxide and hydrogen, and its activity is reduced to less than 30% of the fresh catalyst. The catalyst waste liquid is concentrated on the wiper thin film evaporator. The concentration of rhodium in the obtained concentrated waste liquid was 4900 ppm.
[0044] Add 8.08g of the concentrated catalyst waste liquid and 50ml of absolute ethanol into a 500ml three-necked flask, stir to fully dissolve it, then add 50ml of 1mol / L nitric acid in ethanol and mix well. Add 2ml of hydrogen peroxide to the flask, slowly heat to 70°C, and react for 5h. Then add 50ml of ethanol solution containing 2.5g of NaOH. The synthesis gas was introduced into the reaction system, and after staying for 30 minutes, 50 ml of ethanol solution containing 1.00 g of triphenyl phosphine was added, and the temperature was raised to 80...
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[0045] Example 2
[0046] In a 500ml three-necked flask were added 9.04g of the concentrated catalyst waste liquid in Example 1 and 50ml of absolute ethanol, stirred to fully dissolve it, and then added 50ml of 1mol / L nitric acid in ethanol and mixed well. Air was introduced into the mixed solution in the flask, and the air was bubbled through the bottom of the liquid through an immersion tube to make the oxygen and the catalyst waste liquid fully contact and react. The air flow rate was 100ml / min. Stir and slowly raise the temperature to 90°C, stop the air flow after 20 hours of reaction. Then 50ml of ethanol solution containing 2.5g of NaOH was added and the temperature was reduced to 80°C. The synthesis gas was introduced into the reaction system, and after staying for 30 minutes, 50 ml of ethanol solution containing 1.00 g of triphenyl phosphonium was added, and the reaction was continued to be stirred for 30 minutes. Then 50 ml of ethanol solution containing 1.40 g of NaOH...
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[0047] Example 3
[0048] Add 8.55 g of the concentrated catalyst waste liquid and 50 ml of absolute ethanol in a 500 ml three-necked flask, stir to fully dissolve them, and then add 50 ml of 1 mol / L sulfuric acid ethanol solution and mix well. Air is introduced into the mixed solution in the flask, and air is bubbled through the bottom of the liquid through an immersion tube, so that the oxygen and the catalyst waste liquid are fully contacted and reacted. The air flow rate is 100ml / min. Stir and slowly raise the temperature to 90°C, stop the air flow after 20 hours of reaction. Then 50ml of ethanol solution containing 2.5g of NaOH was added and the temperature was reduced to 80°C. The synthesis gas was introduced into the reaction system, and after staying for 30 minutes, 50 ml of ethanol solution containing 1.00 g of triphenyl phosphonium was added, and the reaction was continued to be stirred for 30 minutes. Then 50 ml of ethanol solution containing 1.40 g of NaOH and 0.90 ...
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