Titanate oxide nano catalyst for synthesizing fatty long-chain carbonic dialkyl ester and carbonic diphenyl ester
A technology of dialkyl carbonate and nano-catalyst, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, preparation of organic carbonate, etc., to achieve easy recycling, mild reaction conditions, high Yield and selectivity effects
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Embodiment 1
[0021] Under normal pressure, add butanol (22g) and TiO to the reactor 2 ·SrO (30mg), the amount of catalyst is 0.1% of the total weight, put dimethyl carbonate (9g) into a constant pressure dropping funnel, heat in an oil bath, and stir magnetically. The temperature was raised to 100°C, the reaction liquid started to reflux, and the time was counted, and DMC was started to react for 2 hours. The catalyst was separated from the reaction liquid. The reaction liquid chromatography analysis showed that the yield of dibutyl carbonate was 87% and the selectivity was 100.0%.
Embodiment 2
[0023] Under normal pressure, add n-octanol (40g) and TiO to the reactor 2 · ZnO (20mg), the amount of catalyst is 0.04% of the total weight, put dimethyl carbonate (10g) into a constant pressure dropping funnel, heat in an oil bath and stir magnetically. The temperature was raised to 140°C, the reaction solution started to reflux and timed, and DMC was started to react for 4 hours. The catalyst was separated from the reaction liquid, and the reaction liquid chromatographic analysis showed that the yield of di-n-octyl carbonate was 76.0% and the selectivity was 100.0%.
[0024] Catalyst repetition times
Embodiment 3
[0026] Under normal pressure, add isooctyl alcohol (40g) and K to the reactor 2 NO 3 / TiO 3 ·Li 2 O (5mg) and catalyst. The amount of catalyst is 0.01% of the total weight. Put dimethyl carbonate (10g) in a constant pressure dropping funnel, heat in an oil bath and stir magnetically. The temperature was raised to 120°C, the reaction solution started to reflux and timed, and DMC was started to react for 2 hours. The catalyst was separated from the reaction liquid, and the reaction liquid chromatographic analysis showed that the yield of diisooctyl carbonate was 67% and the selectivity was 88%.
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