A catalyst composition and preparation method thereof
A composition and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor interaction catalyst strength, no active metal coordination effect, high catalyst metal content, etc.
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preparation example Construction
[0019] The invention provides the preparation method of catalyst, a kind of concrete process step is as follows:
[0020] 1. Ni x W y o z Complex oxide precursors and MoO 3 Preparation of the mixture
[0021] A salt solution containing active metal Ni and W components is added into the reaction tank according to the content ratio of the catalyst components. Nickel-containing salts can be nickel sulfate, nickel nitrate, nickel chloride and the like. The tungsten-containing salt can be sodium tungstate, ammonium metatungstate, etc. After mixing evenly, add the precipitating agent into the above mixture with stirring until a sol mixture is formed. The gelling temperature is 30-100°C, and the gelling pH is 7.0-10.0. After gelling, it can be aged at the gelling temperature for 1-5 hours. Ni in the colloid x W y o z Precursors of composite oxides. It can be filtered or not filtered before and after gelation, adding solid molybdenum trioxide, beating and mixing, and then ...
Embodiment 1
[0034] Add 1000mL of water into the reaction tank, then add 40g of nickel chloride to dissolve, then add 52g of ammonium metatungstate to dissolve, then add 5g of zirconium oxychloride to dissolve, then add 10% ammonia water to form a gel until the pH value is 8, and then gel The temperature is 50°C, aging for 1 hour after forming the gel, and then filtering, adding 600ml of clean water, 16g of molybdenum trioxide and 32g of aluminum hydroxide to the filter cake, beating and stirring evenly, filtering, drying the filter cake at 80°C for 5 hours, and then extruding Molded, washed 3 times with clean water, dried at 120°C for 5 hours, and calcined at 500°C for 4 hours to obtain the final catalyst A. The composition and main properties are shown in Table 2.
Embodiment 2
[0036] According to the method of Example 1, according to the component content ratio of catalyst B in Table 2, add aluminum chloride, nickel chloride, sodium tungstate in the reaction tank, then add 16% ammonia water to form a gel, until the pH value is 9 , the gelling temperature is 80°C, aging for 3 hours after gelling, then filtering, washing the filter cake twice with 500mL clean water, adding clean water and molybdenum trioxide, beating and stirring evenly, filtering, and drying the filter cake at 70°C for 7 hours , and then extruded, washed twice with clean water, dried at 100°C for 8 hours, and calcined at 550°C for 3 hours to obtain the final catalyst B. The composition and main properties are shown in Table 2.
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