Processes and catalysts for the selective hydrogenation of compounds having carbonyl carbon atoms
A hydrogenation catalyst and selective technology, applied in the preparation of organic compounds, the preparation of carbon-based compounds, chemical instruments and methods, etc., can solve the problems of reduction of manufacturing cost, degree of commercial feasibility, etc., and achieve overall economic improvement and increase The effect of effective utilization
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example 1
[0065] Hydrogenation of furfural
[0066] A liquid mixture of 24 grams of furfural and 62 grams of methanol solvent was charged to a 300-cc high pressure reactor (Parr Instrument Company). To this mixture was added 2.05 g of a granular solid catalyst on a carbon support with a metal content of 2% by weight Ru / 2% by weight Sn / 0.5% by weight Pt. The reactor was purged with hydrogen while stirring the reaction mixture continuously at 800 rpm. Thereafter, the reactor was pressurized to 8.3 MPa (1200 psi) with hydrogen, and the reaction mixture was heated to 65° C. and held at this temperature for 1 hour. The reaction mixture was then cooled to room temperature and the reactor was opened. The solid and liquid contents were removed from the reactor and filtered by vacuum filtration to isolate the catalyst. The filtrate was rotavaped to remove the methanol solvent. The composition of the remaining liquid was analyzed using nuclear magnetic resonance (NMR) spectroscopy, and foun...
example 2
[0069] Selective Hydrogenation of Methylglyoxal
[0070] A liquid composition of 15.1 g of methylglyoxal concentrated to 40% by weight in water was added to 86 ml of water, and the resulting mixture was charged to a 300-cc high pressure reactor (Parr Instruments). To this mixture was added 1.96 g of a granular solid catalyst on a carbon support with a metal content of 2% by weight Ru / 2% by weight Sn / 0.5% by weight Pt. The reactor was purged with hydrogen while stirring the reaction mixture continuously at 800 rpm. Thereafter, the reactor was pressurized to 8.3 MPa (1200 psi) with hydrogen, and the reaction mixture was heated to 65° C. and held at this temperature for 1 hour. The reaction mixture was then cooled to room temperature and the reactor was opened. The solid and liquid contents were removed from the reactor and filtered by vacuum filtration to isolate the catalyst. The composition of the filtrate was analyzed using NMR spectroscopy and found to contain a major p...
example 3
[0073] Selective hydrogenation of glyoxal
[0074] A liquid composition of 15.1 g of glyoxal concentrated to 40% by weight in water was added to 85 ml of water, and the resulting mixture was charged to a 300-cc high pressure reactor (Parr Instruments). To this mixture was added 2.17 g of a granular solid catalyst on a carbon support with a metal content of 2% by weight Ru / 2% by weight Sn / 0.5% by weight Pt. The reactor was purged with hydrogen while stirring the reaction mixture continuously at 800 rpm. Thereafter, the reactor was pressurized to 8.3 MPa (1200 psi) with hydrogen, and the reaction mixture was heated to 60° C. and held at this temperature for 1 hour. The reaction mixture was then cooled to room temperature and the reactor was opened. The solid and liquid contents were removed from the reactor and filtered by vacuum filtration to isolate the catalyst. The composition of the filtrate was analyzed using NMR spectroscopy and found to contain glycolaldehyde (14% b...
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