High-selectivity amino acid decarboxylation catalyst and preparation method thereof
A high-selectivity, amino acid technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, preparation of amino compounds from amines, etc., can solve the problem of low selectivity of 2-methylbutylamine, to improve decarboxylation selectivity, High conversion rate, easy to realize the effect of industrialization
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Embodiment 1
[0028] Place 100 mL of 2% dilute nitric acid solution in a 50°C water bath. Add 8g TiOSO while stirring 4 , where TiOSO 4 The volume ratio with the nitric acid aqueous solution is 1:20. While maintaining stirring, 6 mL of polyethylene glycol-2000 was added dropwise. The resulting mixture was stirred at 50° C. for 6 h, and the suspension was centrifuged and filtered. Then wash with water and wash with alcohol three times each, dry at 50°C for 12h, and then roast at 450°C in air atmosphere for 4h to obtain 3.52g of prepared TiO 2 , the target amount is obtained after repeated accumulation.
[0029] 1.3g RuCl 3 ·3H 2 O was dissolved in 80ml of absolute ethanol, ultrasonically dissolved, and then 20g of TiO was added 2 -1, strongly stirred and impregnated for 16 hours; the obtained material was desolventized, dried, fully washed with deionized water, dried at 100°C, calcined at 350°C for 4 hours in an air atmosphere, and cooled in a dry environment to room temperature. Af...
Embodiment 2
[0031] TiO 2 -1 is prepared with embodiment 1. 3.6g RuCl 3 ·3H 2 O was dissolved in deionized water, ultrasonically dissolved, and then 20 g TiO 2 -1, strongly stirred and impregnated for 24 hours; the obtained material was desolventized, dried, fully washed with deionized water, dried at 100°C, granulated, shaped and dried again, then placed in air at 450°C Under roasting for 8h, cooled to room temperature in a dry environment. The sample was then placed in a hydrogen atmosphere and reduced at 500° C. for 3 hours to obtain catalyst B for amino acid decarboxylation.
Embodiment 3
[0033] TiO 2 -1 is prepared with embodiment 1. 3.9g RuCl 3 ·3H 2 O was dissolved in deionized water, ultrasonically dissolved, and then 20 g of commercially available anatase TiO 2 , vigorously stirred and impregnated for 24 hours; the obtained material was desolventized, dried, fully washed with deionized water, dried at 100°C, granulated, shaped and dried again, then roasted at 350°C in air atmosphere 8h, cooled to room temperature in a dry environment. The sample was then placed under a hydrogen atmosphere and reduced at 500° C. for 3 hours to obtain Catalyst C for decarboxylation of amino acid.
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