Method for producing medium-long chain natural vegetable wax by using biodiesel
A technology of natural vegetable wax and biodiesel, which is applied in the field of deep processing of biodiesel, can solve the problems of complex catalyst preparation process, complex refining process, cumbersome hydrogenation process, etc., to improve the utilization value, simple reaction process, and high yield of target products Effect
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Embodiment 1
[0028] 1. Catalyst preparation: Firstly, fully dissolve ammonium molybdate and auxiliary agent I citric acid with deionized water, then add dried anhydrous 40-60 mesh Al 3 o 2 The carrier was supersaturated and adsorbed for 12 hours, and the excess adsorption solution was concentrated in a vacuum oven (60°C, 4h; 80°C, 2h; 120°C, 8h). ,5°C / min, 300°C for 2h; 300~500°C, 5°C / min, 500°C for 4h); impregnate the calcined catalyst in the mixed aqueous solution of cobalt nitrate, nickel nitrate and additive II potassium carbonate for 12h , after supersaturated adsorption, repeat the previous drying and roasting steps to obtain Ni-Co-Mo / Al 3 o 2 catalyst. The metal loading is about 16% (based on oxides), the metal molar ratio Mo:Co:Ni=5:4:1, the mass concentration of additive I citric acid is 2%, and the mass concentration of additive II potassium carbonate is 4%.
[0029] 2. Catalyst vulcanization and hydrogenation: the prepared catalyst is directly loaded into the fixed bed react...
Embodiment 2
[0035] 1. The catalyst preparation method is basically the same as in Example 1, the difference being that the metal molar ratio Mo:Co:Ni=4:5:1, the metal load is 16% (calculated as oxide), the concentration of the auxiliary agent II potassium carbonate solution 5%. Sulfurization and hydrogenation reduction are the same as in Example 1.
[0036] 2. The catalytic reaction conditions are the same as in Example 1.
[0037]3. The biodiesel components and reaction results used in this example are shown in the table below. The conversion rate of biodiesel is 99.99%, basically completely converted. The yield of C15-C24 normal alkanes was 80.14%.
[0038]
[0039] 4. After continuous reaction for 720 hours, the catalytic activity has not decreased, and the conversion rate is still 99.99%.
Embodiment 3
[0041] 1. The preparation method of the catalyst is basically the same as that of Example 1, the difference is that the metal molar ratio Mo:Co:Ni=4:4:2, the metal loading is about 16% (calculated as oxide), and the auxiliary agent II potassium carbonate solution The concentration is 5%. Sulfurization and hydrogenation reduction are the same as in Example 1.
[0042] 2. Catalytic reaction conditions: reaction temperature 320°C, reaction pressure 3.0MPa, hydrogen-oil volume ratio 1200:1, volume space velocity 1.2h -1 .
[0043] 3. The biodiesel components and reaction results used in this example are shown in the table below. The conversion rate of biodiesel is 99.99%, basically completely converted. The yield of C15-C24 normal alkanes was 80.03%.
[0044]
[0045] 4. After continuous reaction for 720 hours, the catalytic activity has not decreased, and the conversion rate is still 99.99%.
[0046] Comparing the above three embodiments, it can be seen that the comprehen...
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