1,3-propylene glycol preparation catalyst and preparation method thereof
A catalyst, propylene glycol technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the one-time investment of production equipment and expensive production costs, difficult to operate, Respond to problems such as high pressure, achieve the effect of reducing one-time investment and production costs, reducing difficulty, and reducing pressure requirements
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Embodiment 1
[0037] Put 60.8 grams of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 2.9 grams of manganese nitrate (Mn(NO 3 ) 2 ) and 66.3 grams of γ-aminopropyltriethoxysilane ((EtO) 3 Si(CH 2 ) 3 NH 2 ) was dissolved in 400 ml of ethanol-water (50vol%) solution. Under heating and stirring, use 10% ammonia solution to neutralize to pH = 8, form a gel within 8 hours, age at room temperature for 6 hours, dry at 110°C for 14 hours, bake at 400°C for 4 hours, and shape. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.
Embodiment 2
[0039] Put 51.5 grams of copper chloride (CuCl 2 2H 2 O), 1.7 g of manganese chloride (MnCl 2 ) and 65.1 grams of N-β-aminoethyl-γ-aminopropyltriethoxysilane ((EtO) 3 Si(CH 2 ) 3 NHCH 2 CH 2 NH 2 ) was dissolved in 400 ml of ethanol-water (50vol%) solution. Under heating and stirring, use 10% nitric acid aqueous solution to neutralize to pH = 6, form a gel within 10 hours, age at room temperature for 6 hours, dry at 120°C for 12 hours, bake at 400°C for 4 hours, and shape. The catalyst code is CSM-64. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.
Embodiment 3
[0041] Put 20.1 grams of copper acetate (Cu(CH 3 OO) 2 ·H 2 O), 1.1 g of manganese acetate (Mn(CH 3 COO) 2 4H 2 O) and 65.1 grams of γ-aminopropylmethyldiethoxysilane ((EtO) 2 CH 3 Si(CH 2 ) 3 NH 2 ) in 400 ml of ethanol-water (50vol%) solution. Under heating and stirring, use 10% ammonia solution to neutralize to pH = 8, form a gel within 12 hours, age at room temperature for 6 hours, dry at 140°C for 10 hours, bake at 400°C for 4 hours, and shape. The catalyst was reduced in a hydrogen stream at 300°C for 4 hours before use.
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