Catalyst for preparation of enol through alkynol semi-hydrogenation and preparation method of catalyst
A catalyst, semi-hydrogenation technology, applied in hydrogenation preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as adverse environmental impact, unsuitable for industrialization, and achieve long service life and high product selectivity. and yield, the effect of enhancing selectivity
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Embodiment 1
[0054] Add 400mL of concentrated hydrochloric acid with a concentration of 37% to 0.45kg of palladium chloride powder and heat to 60°C to dissolve to form solution A; add 10L of deionized water to 5kg of calcium carbonate with a particle size of 200 mesh and stir for 30min to form a milky white milky cloud Solution B; Dissolve 375g of anhydrous sodium carbonate with 7.5L of deionized water at room temperature and slowly add 305mL of formic acid dropwise until no gas is released (at this time the temperature is about 60°C) to form solution C; then add solution A to In emulsion B, after stirring for 5 minutes, heat up to 80°C and keep warm for 10 minutes to obtain brownish-yellow emulsion AB; then quickly add solution C with a temperature of about 60°C to emulsion AB at one time, and heat up to 85°C , then keep warm and stir for 30min until no gas is released, filter while hot, and wash the filter cake 3 times with deionized water until there is no Cl - , dried and weighed to ob...
Embodiment 2
[0056] Add 400mL of concentrated hydrochloric acid with a concentration of 37% to 0.45kg of palladium chloride powder and heat to 60°C to dissolve to form solution A; add 10L of deionized water to 5kg of calcium carbonate with a particle size of 200 mesh and stir for 30min to form a milky white milky cloud Solution B; Dissolve 375g of anhydrous sodium carbonate with 7.5L of deionized water at room temperature and slowly add 305mL of formic acid dropwise until no gas is released (at this time the temperature is about 60°C) to form solution C; then add solution A to In emulsion B, after stirring for 5 minutes, heat up to 80°C and keep warm for 10 minutes to obtain brownish-yellow emulsion AB; then quickly add solution C with a temperature of about 60°C to emulsion AB at one time, and heat up to 85°C , then keep warm and stir for 30min until no gas is released, filter while hot, and wash the filter cake 3 times with deionized water until there is no Cl - , dried and weighed to ob...
Embodiment 3
[0058] Add 400mL of concentrated hydrochloric acid with a concentration of 37% to 0.45kg of palladium chloride powder and heat to 60°C to dissolve to form solution A; add 10L of deionized water to 5kg of calcium carbonate with a particle size of 200 mesh and stir for 30min to form a milky white milky cloud Solution B; Dissolve 375g of anhydrous sodium carbonate with 7.5L of deionized water at room temperature and slowly add 305mL of formic acid dropwise until no gas is released (at this time the temperature is about 60°C) to form solution C; then add solution A to In emulsion B, after stirring for 5 minutes, heat up to 80°C and keep warm for 10 minutes to obtain brownish-yellow emulsion AB; then quickly add solution C with a temperature of about 60°C to emulsion AB at one time, and heat up to 85°C , then keep warm and stir for 30min until no gas is released, filter while hot, and wash the filter cake 3 times with deionized water until there is no Cl - , dried and weighed to ob...
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