Method and catalyst for the production of 1, 3-butadiene from ethanol
A catalyst, butadiene technology, applied in catalysts, molecular sieve catalysts, carbon compound catalysts, etc., can solve problems such as complex mechanisms
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Embodiment 1
[0181] Inventive Example 1 (IE1): SiO 2 Nucleus-Mg 3 Al-CO 3 LDH shell (chemical formula: Mg 0.75 al 0.25 (OH) 2 (CO 3 ) 0.125 )
[0182] Spherical silica with a particle size of 500 nm was used as the core for the synthesis of IE1. IE1 was synthesized by co-precipitation as follows: 5 g of spherical silica was dispersed in 1000 ml of deionized water using ultrasonic treatment for 30 min. Subsequently, 27mmol Na was added 2 CO 3 and further processed by ultrasonication for 5 minutes. Then 1000ml containing 81mmol Mg(NO 3 ) 2 ·6H 2 O and 27mmol Al(NO 3 ) 3 9H 2 Add deionized water, silica and Na to 0 ml of metal precursor aqueous solution 2 CO 3 mixture to obtain a suspension. The pH of the suspension was controlled at pH 10 by the dropwise addition of 1M NaOH. After aging under stirring at a temperature of about 25° C. for 120 minutes, the solid compound obtained was filtered from the suspension using vacuum filtration and washed with deionized water until...
Embodiment 2
[0183] Inventive Example 2 (IE2): Zeolite ZA Core-Mg 3 Al-CO 3 LDH shell (chemical formula: Mg 0.75 al 0.25 (OH) 2 (CO 3 ) 0.125 )
[0184] IE2 was also synthesized using the co-precipitation method: 5 g of zeolite ZA were dispersed in 1000 ml of deionized water using sonication for 30 min. Subsequently, 27mmol Na was added 2 CO 3 and further processed by ultrasonication for 5 minutes. Then 1000ml containing 81mmol Mg(NO 3 ) 2 ·6H 2 O and 27mmol Al(NO 3 ) 3 9H 2 Add deionized water, zeolite ZA and Na 2 CO 3 mixture to obtain a suspension. The pH of the suspension was controlled at pH 10 by the dropwise addition of 1M NaOH. After aging with stirring at a temperature of about 25° C. for 120 minutes, the solid compound obtained was filtered from the suspension using vacuum filtration and washed with deionized water until pH=7 of the filtrate was reached. Finally, the wet cake of solid compound was dried overnight in an oven at 110 °C.
Embodiment 3
[0185] Inventive Example 3 (IE3): SiO 2 Nucleus-Mg 3 al 0.9 Zr 0.1 -CO 3 LDH shell (chemical formula Mg 0.75 al 0.225 Zr 0.025 (OH) 2 (CO 3 ) 0.125 )
[0186] Spherical silica with a particle size of 500 nm was used as the core for the synthesis of IE3. IE3 was again synthesized by co-precipitation: 5 g of spherical silica was dispersed in 1000 ml of deionized water using ultrasonic treatment for 30 minutes. Subsequently, 27mmol Na was added 2 CO 3 and further processed by ultrasonication for 5 minutes. Then 1000ml containing 81mmol Mg(NO 3 ) 2 ·6H 2 O, 24.3mmol Al(NO 3 ) 3 9H 2 O and 2.7 mmol ZrN 2 o 7 9H 2 The aqueous solution of metal precursors of O was added with deionized water, silica and Na 2 CO 3 mixture to obtain a suspension. The pH of the suspension was controlled at pH 10 by dropwise addition of 1M NaOH. After aging with stirring at a temperature of about 25° C. for 120 minutes, the solid compound obtained was filtered from the suspension ...
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