Catalyst used for low water acetic acid synthetic technology and preparation and application method thereof
A synthesis process and catalyst technology, which are applied to the composition and application fields of high-efficiency catalysts, can solve problems such as the inability of bimetallic catalysts to form complexes and the low catalytic efficiency of carbonylation reactions, and achieve reduced preparation costs, improved economic benefits, and improved preparation. The effect of simple process route
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Embodiment 1
[0032] The catalyst described in this embodiment is H[RhCo(CO) 4 I 4 ], the preparation method of described catalyst, comprising:
[0033] (1) the RhI 3 with CoI 2 Added to methanol solvent to obtain a mixture, the RhI 3 The amount of rhodium is 400ppm, the CoI 2 The amount of Co is 200ppm;
[0034] (2) Send the above mixture into a reactor, and react for 3 hours under the conditions of a temperature of 185° C. and a pressure of 3.5 MPa to obtain the catalyst.
[0035] The use method of above-mentioned catalyst comprises:
[0036] (1) Add 63 parts by weight of methanol, 10 parts by weight of methyl acetate, 0.25 parts by weight of catalyst and 3 parts by weight of water into the reactor and stir;
[0037] (2) Pass hydrogen and carbon monoxide into the reaction kettle, heat the temperature in the autoclave to 190°C, and carry out the carbonylation reaction under the pressure of 3.5MPa, and the reaction time is 9 minutes;
[0038] Wherein the partial pressure of the hydr...
Embodiment 2
[0040] The catalyst described in this example is H[RhIr(CO) 4 I 4 ], the preparation method of described catalyst, comprising:
[0041] (1) RhI 3 with IrI 3 Added to acetic acid solvent to obtain a mixture, the RhI 3 The amount of rhodium is 400ppm, the IrI 3 The amount of Ir is 180ppm;
[0042] (2) React for 2.5 hours under the conditions of a temperature of 165° C. and a carbon monoxide partial pressure of 3 MPa to obtain the catalyst.
[0043] The use method of above-mentioned catalyst comprises:
[0044] (1) Add 52 parts by weight of methanol, 8 parts by weight of methyl acetate, 0.2 parts by weight of catalyst, and 5 parts by weight of water into the reactor and stir;
[0045] (2) Pass hydrogen and carbon monoxide into the reaction kettle, heat the temperature in the autoclave to 160°C, and carry out the carbonylation reaction under the pressure of 3MPa, and the reaction time is 10min;
[0046] Wherein the partial pressure of the hydrogen is 0.07MPa.
Embodiment 3
[0048] The catalyst described in this example is H[RhIr(CO) 4 I 4 ], the preparation method of described catalyst, comprising:
[0049] (1) RhI 3 with IrI 3 Added to acetic acid solvent to obtain a mixture, the RhI 3 The amount of rhodium is 400ppm, the IrI 3 The amount of Ir is 180ppm;
[0050] (2) React for 2.5 hours under the conditions of a temperature of 165° C. and a carbon monoxide partial pressure of 3 MPa to obtain the catalyst.
[0051] The use method of above-mentioned catalyst comprises:
[0052] (1) Add 55 parts by weight of methanol, 9 parts by weight of methyl acetate, 0.2 parts by weight of catalyst, and 4 parts by weight of water into the reactor and stir;
[0053] (2) Pass hydrogen and carbon monoxide into the reaction kettle, heat the temperature in the autoclave to 180°C, and carry out the carbonylation reaction under the pressure of 3MPa, and the reaction time is 15min;
[0054] Wherein the partial pressure of the hydrogen is 0.075MPa.
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