Method for preparing molecular sieve composite oxide catalyst using HZSM5 as carrier and its use
A composite oxide and catalyst technology, applied in molecular sieve catalysts, preparation of organic compounds, preparation of hydroxyl compounds, etc., can solve the problems of complex production process, catalyst competition, low product yield, etc., achieve good selectivity and reduce risk , the effect of high activity
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example 1
[0017] 40.6g Cu(NO 3 ) 2 ·3H 2 O, 5.0g Bi(NO 3 ) 3 ·5H 2 O and 1.0gHNO 3 Make a mixed solution, weigh 20g of HZSM-5 (Si / Al=38) and put it into a beaker, take 37g of the above solution and pour it into the beaker to stir and impregnate for 5 hours. Directly dry the impregnated solution together with the solids in the solution at 120°C, grind, and roast at 480°C for 6 hours to obtain a gray powder, that is, the HZSM-5 catalyst loaded with copper oxide and bismuth oxide, wherein the weight of copper contained is 25%, containing 6% by weight of bismuth. .
example 2
[0019] 35.0g Cu(NO 3 ) 2 ·3H 2 O, 7.0g Bi(NO 3 ) 3 ·5H 2 O and 1.0gHNO 3 Prepare a mixed solution, weigh 15.0g of HZSM-5 (Si / Al=38) and put it into a beaker, take 30.0g of the above solution and pour it into the beaker to stir and impregnate for 8 hours. Directly dry the impregnated solution together with the solids in the solution at 120°C, grind, and roast at 600°C for 5 hours to obtain a gray powder, that is, the HZSM-5 catalyst loaded with copper oxide and bismuth oxide, in which the weight of copper is 23 %, containing 6.5% by weight of bismuth.
example 3
[0021] 55.0g Cu(NO 3 ) 2 ·3H 2 O, 4.0g Bi(NO 3 ) 3 ·3H 2 O and 1.0gHNO 3 Make a mixed solution, weigh 20g of HZSM-5 (Si / Al=38) and put it into a beaker, take 33g of the above solution and pour it into the beaker for stirring and impregnation, and the impregnation time is 6.5 hours. Directly dry the impregnated solution together with the solids in the solution at 120°C, grind, and roast at 550°C for 6 hours to obtain a gray powder, that is, the HZSM-5 catalyst loaded with copper oxide and bismuth oxide, which contains 30% copper by weight. %, containing 5.0% by weight of bismuth.
[0022] Take 5g of the above catalyst and 50mL of formaldehyde solution with a concentration of 36.2% and put it into a reaction kettle connected with a stirring and condensing device, and place it in a constant temperature oil bath. First pass N 2 Squeeze the air in the reactor, then raise the temperature to reduce the catalyst, the temperature rises to 90°C, turn off the N 2 Gas, change int...
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