Method for synthesizing crylic acid by catalyzing acetylene carbonyl through palladium
A technology of acetylene carbonyl and acrylic acid, applied in chemical instruments and methods, carbon monoxide reaction to prepare carboxylic acid, physical/chemical process catalyst, etc., can solve problems such as difference in activity
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Embodiment 1
[0018] Weigh Pd(CH 3 COO) 2 0.0110g, CH 3 SO 2 OH 0.11g, 2-PyPPh 2 0.36g, dissolved in 50ml acetone+6mlH 2 O, put into 250ml autoclave, use 1MPa N 2 Replace the air in the kettle twice, fill with C 2 h 2 Saturation to 0.5MPa, then filled with H 2 to 3MPa, then filled with CO to 5MPa, heated to 40°C, and reacted for 2.5 hours. The kettle liquid is orange-red, clear, and the mass concentration of acrylic acid is 12.5%, C 2 h 2 The conversion was 41%, and the selectivity to acrylic acid was 86%.
Embodiment 2
[0020] Weigh Pd(CH 3 COO) 2 0.0120g, p-toluenesulfonic acid 0.38g, 2-PyPPh 2 0.35g, dissolved in 47ml N-methylpyrrolidone+6ml H 2 O, put into 250ml autoclave, use 1MPa N 2 Replace the air in the kettle twice, fill with C 2 h 2 Saturated to 0.5MPa, then filled with CO to 5MPa, heated to 40°C, and reacted for 2.5 hours. The kettle liquid is brown and clear, the mass concentration of acrylic acid is 9.57%, C 2 h 2 The conversion was 43% and the selectivity to acrylic acid was 83%.
Embodiment 3
[0022] Weigh Pd(CH 3 COO) 2 0.0130g, CuBr 2 0.12g, CH 3 SO 2 OH 0.11g, 2-PyPPh 2 0.36g, dissolved in 47ml N-methylpyrrolidone+6ml H 2 O, put into 250ml autoclave, use 1MPaN 2 Replace the air in the kettle twice, fill with C 2 h 2 Saturated to 0.5MPa, then filled with CO to 5MPa, heated to 40°C, and reacted for 2.5 hours. The kettle liquid is light red and clear, the mass concentration of acrylic acid is 2.5%, C 2 h 2 The conversion was 10% and the selectivity to acrylic acid was 76%.
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