Process for the preparation of vinyl acetate
A technology of vinyl acetate and diethylene acetate, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of low vinyl acetate yield and low selectivity, and achieve improved activity and Stability, yield enhancement and selectivity effects
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Embodiment 1
[0028] Preparation of carbonylation catalyst: Co(OAc) containing 8.98g Co, 2.75g La and 3.25g Zn 2 4H 2 O, La(OAc) 3 ·5H 2 O and zinc citrate (Zn 3 (C 6 h 5 o 7 ) 2 2H 2O) fully mixed and dissolved in hydrochloric acid with a concentration of 8wt%, to obtain 400ml of impregnation solution, the specific surface of 1.0L was 165m 2 / g, spherical SiO with a pore volume of 0.98 and a diameter of 5.6 mm 2 The carrier was immersed in the above impregnating solution, left to stand for 2 hours and dried at 100° C. to obtain the catalyst. The carbonylation catalyst was analyzed by ICP, and the Co content was 8.98g / L, the La content was 2.75g / L, and the Zn content was 3.25g / L.
[0029] Synthesis of vinyl acetate:
[0030] Step (1): Add 1.5 mol of acetic acid, 0.05 mol of carbonylation catalyst, 0.10 mol of methyl iodide and 0.45 mol of methyl acetate into a 500ml titanium reactor, first use argon to discharge the air in the reactor and pressurize to 2.0MPa, then Inject carbon...
Embodiment 2
[0035] Preparation of carbonylation catalyst: Co(OAc) containing 8.98g Co, 2.75g La and 3.25g Sr 2 4H 2 O, La(OAc) 3 ·5H 2 O and Sr(OAc) 2 0.5H 2 O is fully mixed and dissolved in pure water to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 165m 2 / g, spherical SiO with a pore volume of 0.98 and a diameter of 5.6 mm 2 The carrier was immersed in the above impregnating solution, left to stand for 2 hours and dried at 100° C. to obtain the catalyst. The carbonylation catalyst was analyzed by ICP, and the Co content was 8.98g / L, the La content was 2.75g / L, and the Sr content was 3.25g / L.
[0036] Synthesis of vinyl acetate:
[0037] Step (1): Add 1.5 mol of acetic acid, 0.05 mol of carbonylation catalyst, 0.10 mol of methyl iodide and 0.45 mol of methyl acetate into a 500ml titanium reactor, first use argon to discharge the air in the reactor and pressurize to 2.0MPa, then Inject carbon monoxide and hydrogen until the pressure is 8.0MPa, increa...
Embodiment 3
[0051] Preparation of carbonylation catalyst: Co containing 7.00g Co, 1.00g Ce and 1.00g Zn 2 (CO) 8 、Ce(OAc) 3 ·6H 2 O and Zn(OAc) 2 2H 2 O is fully mixed and dissolved in acetic acid with a concentration of 10wt%, to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 150m 2 / g, spherical Al with a pore volume of 0.90 and a diameter of 5.6mm 2 o 3 The carrier was immersed in the above impregnating solution, left to stand for 2 hours and dried at 80° C. to obtain the catalyst. The carbonylation catalyst was analyzed by ICP, and the Co content was 7.00 g / L, the Ce content was 1.00 g / L, and the Zn content was 1.00 g / L.
[0052] Synthesis of vinyl acetate:
[0053] Step (1): Add 1.5 mol of acetic acid, 0.05 mol of carbonylation catalyst, 0.10 mol of methyl iodide and 0.45 mol of methyl acetate into a 500ml titanium reactor, first use argon to discharge the air in the reactor and pressurize to 2.0MPa, then Inject carbon monoxide and hydrogen until ...
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