Calcium-based solid base catalyst, preparation method thereof, and application of catalyst in preparation of biodiesel
A solid base catalyst, calcium-based technology, used in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high economic cost, poor stability, easy deactivation, etc., and achieve high catalytic activity and stability. Good sex, easy separation effect
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Embodiment 1
[0045] 35.7mmol Ca(NO 3 ) 2 4H 2 O, 7.7mmol Sr(NO 3 ) 2 4H 2 O and 39.3mmol Al(NO 3 ) 3 9H 2 O is dissolved in deionized water, stirred evenly to obtain a salt solution, which will contain 307.1mmol CO(NH 2 ) 2 The solution was mixed with the saline solution and stirred for 30 minutes. The obtained mixed solution was transferred to an autoclave with a capacity of 100 mL, heated to 120° C. for 12 h to form a precipitate. After natural cooling at room temperature, the resultant was dried overnight at 105°C. The dried sample was activated by calcining at 850°C for 4 hours in a muffle furnace to obtain a catalyst named 0.4Sr-Ca-1Al, where 0.4 represents the mass ratio of SrO and CaO, and 1 represents Al 2 o 3 With the mass ratio of CaO, the structural characterization diagram of the catalyst is shown in Figure 1~2 shown.
[0046] figure 1 Among them, compared with the Ca-1Al catalyst, the crystal phase of the 0.4Sr-Ca-1Al catalyst changed after adding Sr, and a new...
Embodiment 2
[0050] 35.7mmol Ca(NO 3 ) 2 4H 2 O, 7.7mmol Sr(NO 3 ) 2 4H 2 O was dissolved in deionized water, to which 2 g of ZrO 2 Stir well, will contain 130.2mmol CO(NH 2 ) 2 The solution was mixed with the saline solution and stirred for 30 minutes. The obtained mixed solution was transferred to an autoclave with a capacity of 100 mL, heated to 120° C. for 12 h to form a precipitate. After natural cooling at room temperature, the resultant was dried overnight at 105°C. The dried sample was activated by calcining at 850°C for 4 h in a muffle furnace to obtain a catalyst named 0.4Sr-Ca-1Zn, where 0.4 represents the mass ratio of SrO to CaO, and 1 represents the mass ratio of ZrO to CaO.
[0051] 10.5 g of methanol, 20 g of palm oil, and 1.5 g of catalyst (7.5% of the mass of palm oil) were added into a three-necked flask, and condensed and refluxed for 3 h at a temperature of 64° C. in a microwave reactor. The catalyst was separated from the reaction product by a centrifuge at ...
Embodiment 3
[0053] 35.7mmol Ca(NO 3 ) 2 4H 2 O, 11.6mmol Sr(NO 3 ) 2 4H 2 O and 39.3mmol Al(NO 3 ) 3 9H 2 O is dissolved in deionized water, and stirred evenly to obtain a salt solution, which will contain 318.8mmol CO(NH 2 ) 2 The solution was mixed with the saline solution and stirred for 30 minutes. The obtained mixed solution was transferred to an autoclave with a capacity of 100 mL, heated to 110° C. for 12 h to form a precipitate. After natural cooling at room temperature, the resultant was dried overnight at 105°C. The dried sample was activated by calcining at 850°C for 4 hours in a muffle furnace to obtain a catalyst named 0.6Sr-Ca-1Al, where 0.6 represents the mass ratio of SrO to CaO, and 1 represents Al 2 o 3 The mass ratio to CaO.
[0054] 10.5 g of methanol, 20 g of palm oil, and 1.5 g of catalyst (7.5% of the mass of palm oil) were added into a three-necked flask, and condensed and refluxed for 3 h at a temperature of 64° C. in a microwave reactor. The catalys...
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