Catalyst system for methanol low-pressure carbonyl synthesis of acetic acid and application thereof
A carbonyl synthesis and catalyst technology, applied in the field of catalyst systems, can solve the problems of increasing the complexity of the product post-treatment process, accelerating the water-gas reaction, and improving the strong corrosion, so as to facilitate the catalytic reaction rate, increase the solubility, and reduce corrosion. Effect
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Embodiment 1
[0034] Add [Rh(CO) 2 Cl] 2 0.150g, methanol 0.79mol, acetic acid 0.83mol, methyl iodide 0.10mol, water 4%, hydroiodic acid 0.2%, lithium iodide 8.0g, LiHSO 3 0.3g.
[0035] After replacing the air in the reactor with carbon monoxide twice, fill the system with carbon monoxide and close the system, set the stirring speed to 500 rpm, the reaction temperature to 170°C, the reaction pressure to 3.0 MPa, and the reaction time to 18 minutes. The conversion rate of methanol is 99.0%, and the space-time yield of acetic acid is 21.2molAcOH / (L·h).
Embodiment 2
[0037] Add Rh(OAc) to a 250mL zirconium autoclave 2 0.160g, methanol 0.79mol, acetic acid 0.83mol, methyl iodide 0.12mol, water 4%, hydroiodic acid 0.3%, lithium iodide 8.0g, NaHSO 30.3g.
[0038] After replacing the air in the reactor with carbon monoxide twice, fill the system with carbon monoxide and close the system, set the stirring speed at 500 rpm, the reaction temperature at 170°C, the reaction pressure at 3.2 MPa, and the reaction time at 20 minutes. The conversion rate of methanol was 99.1%, and the space-time yield of acetic acid was 19.8molAcOH / (L·h).
Embodiment 3
[0040] Add RhBr to 250mL zirconium autoclave 3 0.330g, methanol 0.72mol, acetic acid 0.83mol, methyl iodide 0.10mol, water 5%, hydroiodic acid 0.2%, lithium iodide 8.0g, LiHSO 3 0.3g.
[0041] After replacing the air in the reactor with carbon monoxide twice, fill the system with carbon monoxide and close the system, set the stirring speed at 500 rpm, the reaction temperature at 170°C, the reaction pressure at 3.0 MPa, and the reaction time at 21 minutes. The conversion rate of methanol is 98.8%, and the space-time yield of acetic acid is 18.5molAcOH / (L·h).
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