Load type catalyst used for synthesizing glutaraldehyde by oxidation of cyclopentene
A supported catalyst and a technology for synthesizing glutaraldehyde. It is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, and the preparation of organic compounds. It can solve the problems of long time, cumbersome preparation, and high manufacturing cost.
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Embodiment 1
[0019] Preparation of catalyst support:
[0020] At room temperature, add 5 g of dodecylamine into 70 mL of aqueous solution containing 1.5 g of hydrochloric acid, stir mechanically, and dropwise add The mixed solution was stirred for 2 hours. Then aged for 12 hours, filtered and washed with ethanol and water successively. Dry at a temperature of 80-120°C for 2-5 hours, and then bake at a temperature of 400-800°C for 2-6 hours. After grinding, 100-120 mesh powder is taken to obtain a white Ti-HMS mesoporous molecular sieve as a catalyst carrier.
[0021] Catalyst preparation:
[0022] In an oil bath at 70-90°C, dissolve 1.6g of ammonium tungstate in 15ml of deionized water, add 0.9g of oxalic acid while stirring, and continue stirring for 20 minutes. After the solution is clarified, add 3g of the above-mentioned catalyst carrier. Stand at room temperature for 12 hours, dry at 90-120°C for 3 hours, and roast at 400-700°C for 2 hours to obtain the catalyst product.
Embodiment 2～10
[0024] Change the consumption of each catalyst carrier starting material and tungsten oxide starting material ammonium tungstate, and the rest are the same as in Example 1.
[0025] The physical index of the catalyst prepared in each embodiment was measured, and the data are shown in Table 1.
[0026] specific surface area
(m 2 / g)
Average pore size
(nm)
Si / Ti in carrier
(The molar ratio of)
Tungsten oxide content
(wt%)
Example 1
705.9
6.3
30
30
Example 2
759.3
5.8
30
30
Example 3
781.5
5.2
10
30
Example 4
762.8
5.4
40
30
Example 5
713.4
7.1
30
20
Example 6
679.5
7.8
20
20
Example 7
664.9
7.3
40
20
Example 8
668.3
7.3
30
40
Example 9
615.7
9.6
40
40
Exa...
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