Complex catalyst for synthesizing carbonate ester by using homogeneous oxidation carbonylation of alcohol (S), its preparation technology and use method
A homogeneous oxidation and preparation technology, which is applied in the preparation of organic compounds, catalyst activation/preparation, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of large amount of catalyst usage, toxicity of reaction medium, and corrosiveness Low-level problems, to achieve the effect of stable catalyst structure, good selectivity stability, and simple preparation process
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Embodiment 1
[0036] Weigh 11.2gCuBr 2 and 42.2g of tetraethylammonium bromide were dissolved in 100ml and 50ml of absolute ethanol or methyl acetate respectively, then the two were mixed, heated and boiled at 80°C, and maintained for about 70min, cooled to room temperature, filtered, and vacuumed Dry at 60°C to get 51.0g brown powder CuBr 2 - Tetraethylammonium bromide catalyst.
Embodiment 2
[0038] In a 1000ml autoclave, add 100ml methanol, 5gCuBr 2 -Tetraethylammonium bromide catalyst (Cu / N=1 / 2), use CO to replace the air in the reactor, then press CO to about 2.0MPa at room temperature, and when heated to 110°C, feed an appropriate amount of O 2 , maintain the reaction pressure at about 3.5MPa, and react for 2.5h. During the reaction process, the consumed CO and O need to be continuously replenished. 2 . After cooling, it was analyzed by gas chromatography. The selectivity of dimethyl carbonate is 99.5%, and the productivity of the catalyst is 2.5gDMC / g.cat.h.
Embodiment 3
[0040] with 5gCuBr 2 -Tetrabutylammonium bromide (Cu / N=1 / 2) is made catalyst, and all the other conditions are the same as embodiment 2, and the dimethyl carbonate selectivity is 98.5%, and the catalyst productivity is 3.0gDMC / g.cat.h.
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