Fluidized bed catalyst for producing halogenated aromatic nitrile and its application
A fluidized bed catalyst, halogenated aromatic nitrile technology, applied in physical/chemical process catalysts, molecular sieve catalysts, organic chemistry, etc., can solve the problems of low aromatic nitrile selectivity, high catalyst cost, etc., and achieve high activity and improved catalytic effect , the effect of improving economic efficiency
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Embodiment 1
[0049] Catalyst preparation:
[0050] Put 0.5mol of V 2 o 5 Add it into a 50wt% oxalic acid solution containing 2.1mol oxalic acid at 80-90°C, stir well, and react for 2 hours to obtain a vanadium-containing solution.
[0051] Slowly add 200g MCM-41 pure silicon molecular sieve to the above solution under stirring, then add 85% phosphoric acid containing 0.7mol phosphoric acid, 0.4mol chromium nitrate, 0.1mol boric acid, 0.05mol Potassium nitrate, 0.01mol phosphomolybdic acid, 0.05mol cerium nitrate and 0.01mol zirconium nitrate were stirred into a stable mixed solution and heated and evaporated to a solid content of 45% (weight) to obtain a thick slurry.
[0052] The above slurry was spray-dried in a spray dryer to form, and the formed catalyst precursor was pre-calcined at 300°C for 2 hours, and then calcined at 650°C for 4.5 hours to obtain the catalyst active component in terms of atomic ratio except O: VP 0.71 Cr 0.4 B 0.1 Mo 0.12 K 0.05 Ce 0.05 Zr 0.01 , the ave...
Embodiment 2-24
[0062] Adopt the same preparation method as Example 1, but adjust the addition of each component to obtain catalysts with different content compositions, and use the same evaluation conditions as Example 1 to carry out the ammoxidation of o-chlorotoluene. The evaluation results are shown in Table 1.
Embodiment 25
[0064] Catalyst preparation:
[0065] Put 0.5mol of V 2 o 5 Add it into a 50wt% oxalic acid solution containing 2.1mol oxalic acid at 80-90°C, stir well, and react for 2 hours to obtain a vanadium-containing solution.
[0066] Slowly add 200g of SSZ-13 molecular sieve to the above solution under stirring, then add 85% phosphoric acid containing 0.7mol of phosphoric acid and 0.4mol of chromium nitrate respectively under stirring, stir to form a stable mixed solution and heat and evaporate to The solid content was 45% (weight), and a viscous slurry was obtained.
[0067] The above slurry was spray-dried in a spray dryer to form, and the formed catalyst precursor was pre-calcined at 300°C for 2 hours, and then calcined at 650°C for 4.5 hours to obtain the catalyst active component in terms of atomic ratio except O: VP 0.71 Cr 0.4 , the average particle size of the catalyst is 67 μm.
[0068] The catalyst is used for the ammoxidation of o-chlorotoluene to produce o-chlorobenz...
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