A kind of non-precious metal catalyst for hydrogenation of acetic acid to ethanol and its preparation method and application
A non-precious metal and catalyst technology, applied in the field of non-precious metal catalysts, can solve the problems of harsh operating conditions, poor catalyst performance, high catalyst cost, etc., and achieve the effects of low cost, simple method and easy operation.
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Embodiment 1
[0031] According to the method described in the present invention, the preparation of the non-precious metal catalyst for the hydrogenation of acetic acid to ethanol in this embodiment is carried out, and the specific preparation steps are as follows:
[0032] Step 1. According to the composition of the catalyst, the molar ratio is calculated as a:b:c=1:0.3:0.2 in terms of metal elements, prepare 9.378g copper nitrate, 2.22g magnesium nitrate and 1.011g potassium nitrate; dissolve copper nitrate and magnesium nitrate In deionized water, in the above aqueous solution, according to the molar ratio (a+b+c): citric acid: water = 1:3:60, add citric acid, fully stir to dissolve, then add potassium nitrate, adjust the mixed solution with nitric acid and ammonia water The pH value is at 0.65, and mixed solution A is obtained;
[0033] Step 2. Heat the solution A obtained in step 1 at 65°C until a viscous gel is formed, and dry the gel in an oven. The gel foams and expands until the vo...
Embodiment 2
[0037] According to the method described in the present invention, the preparation of the non-precious metal catalyst for the hydrogenation of acetic acid to ethanol in this embodiment is carried out, and the specific preparation steps are as follows:
[0038] Step 1. According to the composition of the catalyst, the molar ratio is a:b:c=1:0.5:0.05 in terms of metal elements, and 6.48g of nickel chloride, 4.74g of magnesium nitrate and 0.41g of calcium nitrate are prepared. Dissolve nickel chloride and magnesium nitrate in deionized water, add citric acid in the above aqueous solution according to the molar ratio (a+b+c): citric acid: water = 1:5:50, fully stir to dissolve, then add calcium nitrate , adjust the pH value of the mixed solution at 0.70 by nitric acid and ammonia water to obtain a mixed solution A;
[0039] Step 2. Heat the solution A obtained in step 1 at 80°C until a viscous gel is formed, and dry the gel in an oven. The gel foams and expands until the volume do...
Embodiment 3
[0043] According to the method described in the present invention, the preparation of the non-precious metal catalyst for the hydrogenation of acetic acid to ethanol in this embodiment is carried out, and the specific preparation steps are as follows:
[0044] Step 1. According to the composition of the catalyst, the molar ratio is a:b:c=1:0.8:0.01 in terms of metal elements, prepare 9.15g cobalt nitrate, 8.53g aluminum nitrate and 0.13g barium nitrate. Dissolve cobalt nitrate and aluminum nitrate in deionized water, add citric acid in the above aqueous solution according to the molar ratio (a+b+c): citric acid: water = 1:3:30, fully stir to dissolve, then add barium nitrate, The pH value of the mixed solution is adjusted at 0.75 by nitric acid and ammonia water to obtain a mixed solution A;
[0045]Step 2. Heat the solution A obtained in step 1 at 70°C until a viscous gel is formed, and dry the gel in an oven. The gel foams and expands until the volume does not change. The dr...
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Abstract
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