Method for preparing 1,3-propylene glycol
A technology of propylene glycol and hydroformylation catalyst, which is applied in the direction of alcoholysis preparation, carboxylate preparation, chemical instruments and methods, etc., 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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