Catalytic hydrogenation method of nitrile rubber
A technology of nitrile rubber and nitrile rubber, which is applied in the field of polymer hydrogenation modification, can solve the problems of increasing the cost of hydrogenated nitrile rubber, achieve efficient catalytic hydrogenation, improve catalytic activity, and reduce production costs
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Embodiment 1
[0028] Embodiment 1 A kind of catalytic hydrogenation method of nitrile rubber:
[0029] Add 5 wt% nitrile rubber solution into 50mL autoclave, add 1mg Fe 3 (CO) 12 With 10 mg propylene oxide, stir well at room temperature. Fill the autoclave with 1MPa nitrogen to replace the air in the autoclave, and repeat 3 times. Afterwards, hydrogen gas was charged into the autoclave at a pressure of 5 MPa, the reaction temperature was controlled to be 140°C by heating, and the reaction time was continuously stirred for 24 hours. After reaching the reaction time, cool the above-mentioned autoclave to room temperature, slowly open the vent valve, reduce the pressure to normal pressure, open the autoclave, and take out the reaction mixture. Add the poor solvent n-hexane, settle to obtain the target product, and the iodine value of the product is 22. The iodine value of the raw material of nitrile rubber is 305, that is, the degree of hydrogenation of hydrogenated nitrile rubber is 93%. ...
Embodiment 2
[0035] Embodiment 2 A kind of catalytic hydrogenation method of nitrile rubber:
[0036] Add 10 wt% nitrile rubber solution to a 250mL autoclave, add 1mL containing 0.1mg Fe 3 (CO) 12 Chlorobenzene solution and 10mg propylene oxide, stir well. Fill the autoclave with 1MPa nitrogen to replace the air in the autoclave, and repeat 3 times. Then fill the high-pressure reactor with hydrogen gas at a pressure of 10 MPa, heat to control the reaction temperature at 190° C., and continuously stir for a reaction time of 96 hours. After reaching the reaction time, cool the above-mentioned autoclave to room temperature, slowly open the vent valve, reduce the pressure to normal pressure, open the autoclave, and take out the reaction mixture. Add poor solvent n-hexane, settling to obtain the target product, the iodine value of the product is 215. The iodine value of the raw material of nitrile rubber is 305, that is, the degree of hydrogenation of hydrogenated nitrile rubber is 29.5%. ...
Embodiment 3
[0038] Embodiment 3 A kind of catalytic hydrogenation method of nitrile rubber:
[0039] Add 1 wt% nitrile rubber solution into 250mL autoclave, add 10mg Fe 3 (CO) 12 With 100mg propylene oxide, stir well. Fill the autoclave with 1MPa nitrogen to replace the air in the autoclave, and repeat 3 times. Then fill the high pressure reactor with hydrogen gas at a pressure of 1 MPa, heat to control the reaction temperature to 30° C., and continuously stir for a reaction time of 1 h. After reaching the reaction time, cool the above-mentioned autoclave to room temperature, slowly open the vent valve, reduce the pressure to normal pressure, open the autoclave, and take out the reaction mixture. Add poor solvent n-hexane, settling to obtain the target product, the iodine value of the product is 250. The iodine value of the raw material of nitrile rubber is 305, that is, the degree of hydrogenation of hydrogenated nitrile rubber is 18%.
[0040] Among them: 1 wt% nitrile rubber solut...
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