Process for the preparation of 1,3-propanediol
A technology selected from propylene glycol, which is applied in the field of preparing 1,3-propanediol, can solve the problems of low yield and selectivity of propylene glycol, and achieve the effect of improving activity and stability
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Embodiment 1
[0025] The preparation of hydroformylation catalyst: the RhCl that contains 6.50gRh, contains 1.50gLi and contains 3.50gSn 3 ·3H 2 O, LiCl, and SnCl 2 2H 2 O is fully mixed and dissolved in an aqueous hydrochloric acid solution with a concentration of 8wt%, 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 5.6mm 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 Rh content of the catalyst was measured by ICP to be 6.50 g / L, the Li content was 1.50 g / L, and the Sn content was 3.50 g / L.
[0026] Synthesis of 1,3-propanediol:
[0027] 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. 1.0MPa, then feed carbon monoxide and hydrogen until the pressure is 5.2MPa, increase the stir...
Embodiment 2
[0033] The preparation of hydroformylation catalyst: the RhCl that contains 6.50gRh, contains 1.50gLi and contains 3.50gTi 3 ·3H 2 O, LiCl, and TiCl 4 Fully mix and dissolve in an aqueous hydrochloric acid solution with a concentration of 8wt%, 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 Rh content of the catalyst was measured by ICP to be 6.50 g / L, the Li content was 1.50 g / L, and the Ti content was 3.50 g / L.
[0034] Synthesis of 1,3-propanediol:
[0035] 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. 1.0MPa, then feed carbon monoxide and hydrogen until the pressure is 5.2MPa, increase the stirring speed to...
Embodiment 3
[0051] The preparation of hydroformylation catalyst: the Rh(OAc) that contains 6.50gRh, contains 1.50gK and contains 3.50gGe 3 、K 2 SO 4 and GeCl 4 Fully mixed and dissolved in 10wt% acetic acid aqueous solution to obtain 400ml of impregnating solution, and the specific surface of 1.0L was 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 100° C. to obtain the catalyst. The Rh content of the catalyst was determined by ICP to be 6.50 g / L, the K content to be 1.50 g / L, and the Ge content to be 3.50 g / L.
[0052] Synthesis of 1,3-propanediol:
[0053] 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. 1.0MPa, then feed carbon monoxide and hydrogen until the pressure is 5.2MPa, increase the stirring speed to 800rpm, stir and heat ...
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