| 摘要 |
Ethanol is produced by reacting methanol with carbon dioxide and hydrogen at a temperature in the range 150 DEG to 250 DEG C., a pressure in the range 100 to 300 bars and a residence time in the range 10 minutes to 8 hours in the presence of: (i) a cobalt-containing catalyst optionally promoted with iodine, bromine or an organo-phosphorus compound and optionally in the presence of a stabilizer and, (ii) an additive which may be a monocarboxylic acid and/or a derivative thereof and, optionally, a non-polar solvent such as an alkane, benzene or an alkyl-substituted benzene. The preferred additives are acetic acid and methyl acetate. The presence of the additive increases the total realizable yield and selectivity to ethanol. |
