Method for producing 1,3-propylene glycol from vinyl acetate
A technology of vinyl acetate and propylene glycol, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, organic chemistry, etc., can solve the problems of low yield and selectivity of propylene glycol, and achieve improved activity and stability sexual effect
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[0028] [Example 1]
[0029] The preparation of the hydroformylation catalyst: the Co containing 8.60g Co, 1.80g Sr and 3.00g Sn 2 (CO) 8 , Sr(OA C ) 2 ·0.5H 2 O and triphenyltin chloride (C 18 H 15 ClSn) was thoroughly mixed and dissolved in an acetic acid aqueous solution with a concentration of 10wt% to obtain 400ml of immersion liquid, and 1.0L specific surface was 168m 2 / g, spherical SiO with a pore volume of 0.94 and a diameter of 5.6mm 2 The carrier is immersed in the above-mentioned impregnating solution, and left to stand for 3 hours to dry at 100°C to obtain the catalyst. The Co content of the catalyst determined by ICP is 8.60g / L, the Sr content is 1.80g / L, and the Sn content is 3.00g / L.
[0030] Synthesis of 1,3-propanediol:
[0031] Step (1): Add 2.50mol of toluene, 0.02mol of the main hydroformylation catalyst, 0.20mol of triphenylphosphorus and 1.65mol of vinyl acetate into a 1L titanium reactor, first use argon to exhaust the air in the kettle and press it to 2.0MPa,...
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[0036] [Example 2]
[0037] The preparation of the hydroformylation catalyst: the Co containing 8.60g Co, 1.80g Sr and 3.00gZn 2 (CO) 8 , Sr(OA C ) 2 ·0.5H 2 O and zinc citrate (Zn 3 (C 6 H 5 O 7 ) 2 ·2H 2 O) Fully mix and dissolve in an acetic acid aqueous solution with a concentration of 10wt% to obtain 400ml of immersion liquid, with 1.0L specific surface area of 168m 2 / g, spherical SiO with a pore volume of 0.94 and a diameter of 5.6mm 2 The carrier is immersed in the above-mentioned impregnating solution, and left to stand for 3 hours to dry at 100°C to obtain the catalyst. The Co content of the catalyst determined by ICP is 8.60g / L, the Sr content is 1.80g / L, and the Zn content is 3.00g / L.
[0038] Synthesis of 1,3-propanediol:
[0039] Step (1): Add 2.50mol of toluene, 0.02mol of the main hydroformylation catalyst, 0.20mol of triphenylphosphorus and 1.65mol of vinyl acetate into a 1L titanium reactor, first use argon to exhaust the air in the kettle and press it to 2.0MPa,...
Example Embodiment
[0054] [Example 3]
[0055] Preparation of hydroformylation catalyst: Co(OAc) containing 7.00g Co, 0.50gBe and 1.00g Sn 2 ·4H 2 O, BeCl 2 And SnCl 2 ·2H 2 O is thoroughly mixed and dissolved in an aqueous solution of hydrochloric acid with a concentration of 8wt% to obtain 400ml of immersion liquid. The 1.0L specific surface is 200m 2 / g, spherical Al with pore volume of 1.00 and diameter of 5.6mm 2 O 3 The carrier is immersed in the above-mentioned impregnating solution, and left to stand for 3 hours to dry at 80°C to obtain the catalyst. The Co content of the catalyst determined by ICP is 7.00g / L, the Be content is 0.50g / L, and the Sn content is 1.00g / L.
[0056] Synthesis of 1,3-propanediol:
[0057] Step (1): Add 2.50mol of toluene, 0.02mol of the main hydroformylation catalyst, 0.20mol of triphenylphosphorus and 1.65mol of vinyl acetate into a 1L titanium reactor, first use argon to exhaust the air in the kettle and press it to 2.0MPa, then feed carbon monoxide and hydrogen unt...
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