A kind of method of one-pot method catalytic hydrogenation nitrile butadiene rubber
A technology for catalyzing the hydrogenation of nitrile-butadiene rubber and hydrogenated nitrile-butadiene rubber is applied in the field of ultraviolet light in-situ preparation of catalysts and in the field of hydrogenation of nitrile-butadiene rubber, which can solve the problems of energy waste, cumbersome steps, time-consuming and the like, and achieves mild reaction and simple operation. , the effect of high hydrogenation degree
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0017] The present embodiment provides a method for catalytically hydrogenating nitrile rubber at room temperature in a one-pot method, specifically:
[0018] (1) 100mg of TiO 2 Add 5ml of water, stir, add 1.6ml of H 2 PdCl 4 Solution, wherein the quality of the Pd element is 3.4mg, stir evenly, add 5 g of nitrile rubber glue solution with xylene as solvent and a mass fraction of 10%, and continue stirring to obtain a mixed solution;
[0019] (2) The mixed solution was irradiated with ultraviolet light for 15 minutes, then placed in a 30 mL reactor, and hydrogenated for 5 hours at a temperature of 30° C., a pressure of 3 MPa, and a rotational speed of 400 r / min to obtain hydrogenated nitrile rubber.
[0020] After testing, the degree of hydrogenation of the hydrogenated nitrile rubber prepared by the method provided in this example is 92.7%.
Embodiment 2
[0022] Compared with Example 1, the difference is only that: the time of irradiation under ultraviolet light in step (2) is respectively 5min, 10min, 20min, and 30min.
[0023] The degree of hydrogenation of the product and the result of the degree of hydrogenation of the product obtained in Example 1 are shown in Table 1 under the above-mentioned ultraviolet light irradiation time.
[0024] Table 1. The degree of hydrogenation under different UV irradiation time
[0025] UV exposure time / min Hydrogenation degree / % 5 80.8 10 85.4 20 87.0 30 87.5
[0026] From the data in Table 1, it can be seen that after the ultraviolet light irradiation time is extended to 15min, the degree of hydrogenation of the prepared hydrogenated nitrile rubber has no substantial change, indicating that the in-situ preparation of the catalyst can be realized in a relatively short period of time, saving the reaction time. time.
Embodiment 3
[0028] Compared with Example 1, the difference is only that the catalyst (i.e. TiO 2 and the sum of Pd element) are 203.4mg, 43.4mg, 30.1mg, 23.4mg, 19.4mg.
[0029] The degree of hydrogenation of the product after adopting the above scheme and the result of the degree of hydrogenation of the product obtained in Example 1 are shown in Table 2.
[0030] Table 2. Degree of hydrogenation under different catalyst additions
[0031] Catalyst quality Hydrogenation degree / % 203.4 92.7 43.4 83.0 30.1 78.8 23.4 75.2 19.4 73.5
PUM
| Property | Measurement | Unit |
|---|---|---|
| wavelength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More