3-methyl lactate hydrogenation catalyst and preparation method thereof
A technology of methyl hydroxypropionate and hydrogenation catalyst, which is applied in the preparation of hydroxyl compounds, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of low concentration of methyl 3-hydroxypropionate, cumbersome catalyst washing, separation and Purification is difficult and other problems, to achieve the effect of less solvent content, simple preparation process, and less waste water treatment
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Embodiment 1
[0033] Preparation of Cu:Mo:C weight ratio of 3-hydroxypropionate methyl ester hydrogenation catalyst of 45:18:7:
[0034] (1) Dissolve copper acetate and ammonium molybdate in deionized water according to the ratio, and stir and mix at room temperature;
[0035] (2) Weigh the starch by 3 times of the measured amount, then soak it with 2wt% acetic acid aqueous solution, the quality of the acetic acid aqueous solution is 5 times of the starch quality, then wash and filter three times with deionized water of the same quality;
[0036] (3) Quickly add the mixture obtained in step (1) to the starch obtained in step (2) and mix, then dry at 110°C for 10 hours, and then press into tablets;
[0037] (4) Then bake in the air at 130°C for 5 hours, and then bake in a nitrogen atmosphere at 700°C for 7 hours; then after cooling down to room temperature, air is introduced into the aforementioned nitrogen to make the volume of oxygen account for 1% of the total, and passivation After 8 ho...
Embodiment 2
[0040] Preparation of Cu:Mo:C weight ratio of 3-hydroxypropionate methyl ester hydrogenation catalyst of 3:1:1:
[0041] (1) Dissolve copper acetate and ammonium molybdate in deionized water according to the ratio, and stir and mix at room temperature;
[0042] (2) Weigh the starch according to 1.8 times of the measured amount, then soak it with 6wt% citric acid aqueous solution which is 4 times the mass of the starch, then wash and filter twice with deionized water of equal mass;
[0043] (3) Quickly add the mixture obtained in step (1) to the starch obtained in step (2) and mix, then dry at 120°C for 6 hours, and then press into tablets;
[0044] (4) Then roast in the air at 300°C for 4 hours, then roast at 800°C for 5 hours in a nitrogen atmosphere, then drop to room temperature, and feed oxygen into the aforementioned nitrogen so that the volume content of oxygen accounts for 2% of the total volume, Passivation for 4 hours; take out the catalyst, break it into 40-60 meshe...
Embodiment 3
[0047] Preparation of Cu:Mo:C weight ratio of 3-hydroxypropionate methyl ester hydrogenation catalyst of 49:14:27:
[0048] (1) Dissolve copper acetate and ammonium molybdate in deionized water according to the ratio, and stir and mix at room temperature;
[0049] (2) Weigh the starch according to 2.5 times of the measured amount, then soak it with 1wt% acetic acid aqueous solution which is 6 times the mass of the starch, then wash and filter twice with deionized water of equal mass;
[0050] (3) Quickly add the mixture obtained in step (1) to the starch obtained in step (2) and mix, then dry at 120°C for 6 hours, and then press into tablets;
[0051] (4) Then bake in the air at 250°C for 5 hours, then bake at 900°C for 4 hours in a nitrogen atmosphere; then lower it to room temperature, and let air flow into the aforementioned nitrogen so that the volume content of oxygen accounts for 1% of the total volume of the gas , passivated for 8 hours, took out the catalyst, crushed ...
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