Preparation method of hydrogenation catalyst
A hydrogenation catalyst and catalyst technology are applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., which can solve the problems of large influence of catalyst activity, poor stability, and influence on product quality, etc., to improve the reaction Effects of activity and selectivity as well as stability, uniform grain size, and non-collapse
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[0035] Example 1
[0036] (1) At 20℃, it will contain 125 grams of Cu(NO 3 ) 2 .3H 2 O and 313.2 grams of Zn(NO 3 ) 2 .6H 2 1000ml of O mixed solution and precipitant ammonia (molar concentration of 4.41mol / L) are co-precipitated in parallel, and the pH of the precipitation system is maintained at 5.4. After the addition, continue constant temperature stirring for 50 minutes;
[0037] (2) Add 131.7 grams of Cu(NO) to the precipitate obtained in step (1) 3 ) 2 .3H 2 O and 204.4 g Al(NO 3 ) 3 9H 2 O, 48.5 g Mn (NO 3 ) 2 1000ml of soluble salt mixed solution (50ml of polyoxyethylene polyoxypropylene pentaerythritol ether is added) and precipitant ammonium carbonate (molar concentration of 1.7mol / L) are co-precipitated in parallel, while the temperature of the system is increased to 50°C , And maintain the pH value of the precipitation system at 6.6, after the co-current dripping, stir at constant temperature for 100 minutes;
[0038] (3) Filter the product obtained in step (2...
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[0040] Example 2
[0041] (1) Put 125 grams of Cu(NO 3 ) 2 .3H 2 O and 99.32 g (NH 4 ) 6 H 2 W 12 O 40 .45H 2 O was dissolved in 1000mL deionized water, and then the precipitation agent ammonium carbonate (molar concentration of 5.0mol / L) was added dropwise for co-precipitation, and the pH of the precipitation system was maintained at 5.0. After the addition, the constant temperature stirring was continued for 60 minutes;
[0042] (2) Add 131 grams of Cu(NO) to the precipitate obtained in step (1) 3 ) 2 .3H 2 O and 145.44 grams of Al(NO 3 ) 3 9H 2 O, 38.4 grams of Ti(NO 3 ) 4 1000mL of soluble salt mixed solution and precipitating agent ammonia (molar concentration of 1.5mol / L, which contains 30mL of polyoxyethylene polyoxypropanolamine ether) are co-precipitated in parallel, while the temperature of the system is increased to 60 ℃, and Keep the pH of the precipitation system at 7.0, and after the co-current dripping is finished, stir at constant temperature for 90 minutes;
...
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[0045] Example 3
[0046] (1) At 40℃, it will contain 155 grams of Cu(NO 3 ) 2 .3H 2 O and 161.7 grams of Mo(NO 3 ) 6 .5H 2 1000mL of O mixed solution and precipitating agent ammonia (molar concentration 5.0mol / L) are co-precipitated in parallel, and the pH of the precipitation system is maintained at 6.2. After the addition, continue constant temperature stirring for 60 minutes;
[0047] (2) First add 25 mL of polyoxypropylene oxide ethylene glycerol ether to the precipitate obtained in step (1), stir well and add 170 g of Cu(NO 3 ) 2 .3H 2 O and 187.0 g Al(NO 3 ) 3 9H 2 O, 70.9 g Zr(NO 3 ) 4 .5H 2 O soluble salt mixed solution 1000mL and precipitation agent ammonium bicarbonate (molar concentration of 2.0mol.L -1 ) Co-precipitation is added dropwise while the temperature of the system is increased to 70°C and the pH of the precipitation system is maintained at 7.5. After the dropwise addition is completed, constant temperature stirring is performed for 120 minutes;
[0048] ...
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