Method for synthesizing 1,3-propanediol through hydroformylation of vinyl acetate
A technology for vinyl acetate hydroformyl and acetoxypropanol, which is applied in the field of vinyl acetate hydroformylation to synthesize 1,3-propanediol, can solve the problems of low yield and selectivity of propylene glycol, and achieves improved activity and stability Effect
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Embodiment 1
[0028] Preparation of hydroformylation catalyst: Co containing 8.40gCo, 1.70gTe and 3.10gCr 2 (CO) 8 , ammonium tellurate ((NH 4 ) 2 TeO 4 ) and Cr(OAc) 3 ·6H 2 O is fully mixed and dissolved in an aqueous acetic acid solution with a concentration of 10wt%, to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 168m 2 / g, spherical SiO with a pore volume of 0.94 and a diameter of 5.6 mm 2 The carrier was immersed in the above impregnating solution, left to stand for 3 hours and dried at 100° C. to obtain the catalyst. The Co content of the catalyst was determined by ICP to be 8.40 g / L, the Te content was 1.70 g / L, and the Cr content was 3.10 g / L.
[0029] Synthesis of 1,3-propanediol:
[0030]Step (1): Add 2.50 mol of toluene, 0.02 mol of hydroformylation main catalyst, 0.20 mol of triphenylphosphine and 1.65 mol of vinyl acetate into a 1L titanium reactor. 2.0MPa, then feed carbon monoxide and hydrogen until the pressure is 12.0MPa, increase th...
Embodiment 2
[0036] Preparation of hydroformylation catalyst: Co containing 8.40gCo, 1.70gTe and 3.10gSr 2 (CO) 8 , ammonium tellurate ((NH 4 ) 2 TeO 4 ) and Sr(OA C ) 2 0.5H 2 O is fully mixed and dissolved in an aqueous acetic acid solution with a concentration of 10wt%, to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 168m 2 / g, spherical SiO with a pore volume of 0.94 and a diameter of 5.6 mm 2 The carrier was immersed in the above impregnating solution, left to stand for 3 hours and dried at 100° C. to obtain the catalyst. The Co content of the catalyst was determined by ICP to be 8.40 g / L, the Te content was 1.70 g / L, and the Sr content was 3.10 g / L.
[0037] Synthesis of 1,3-propanediol:
[0038] Step (1): Add 2.50 mol of toluene, 0.02 mol of hydroformylation main catalyst, 0.20 mol of triphenylphosphine and 1.65 mol of vinyl acetate into a 1L titanium reactor. 2.0MPa, then feed carbon monoxide and hydrogen until the pressure is 12.0MPa, increa...
Embodiment 3
[0054] The preparation of hydroformylation catalyst: the Co(OAc) that contains 7.00gCo, contains 0.50gB and contains 1.00gCr 2 4H 2 O, ammonium pentaborate ((NH 4 )B 5 o 8 ·8H 2 O) and CrCl 3 ·6H 2 O is fully mixed and dissolved in a concentration of 10wt% acetic acid aqueous solution to obtain 400ml of impregnation solution, and the specific surface of 1.0L is 200m 2 / g, spherical Al with a pore volume of 1.00 and a diameter of 5.6mm 2 o 3 The carrier was immersed in the above impregnating solution, left to stand for 3 hours and dried at 80° C. to obtain the catalyst. The Co content of the catalyst was measured by ICP and ICP-MS to be 7.00 g / L, the B content was 0.50 g / L, and the Cr content was 1.00 g / L.
[0055] Synthesis of 1,3-propanediol:
[0056] Step (1): Add 2.50 mol of toluene, 0.02 mol of hydroformylation main catalyst, 0.20 mol of triphenylphosphine and 1.65 mol of vinyl acetate into a 1L titanium reactor. 2.0MPa, then feed carbon monoxide and hydrogen un...
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