The invention discloses a method for producing isopropanol through
acetone hydrogenation. The method comprises the following steps: preheating
acetone and the like by using a
metering pump, simultaneously introducing
hydrogen, preheating the material, feeding the preheated material into a
trickle bed reactor filled with a catalyst from the top of the reactor, cooling the product, feeding the cooled product into a hydrogenation high-pressure separation tank for carrying out gas-liquid separation, and returning the
hydrogen containing uncondensed components to the
reaction system through a circulating
hydrogen compressor after fresh hydrogen is supplemented; and reducing the pressure of a
liquid phase to be lower than 0.3 MPa in the hydrogenation low-pressure separation tank, cooling a part of reaction products, pumping the reaction products back to the
reaction system for heat exchange by using an external
circulating pump, feeding the rest reaction products to a separation section, and sequentially passing through a light component removal
tower, a heavy component removal
tower and a
dehydration tower to obtain an isopropanol product with the purity of more than or equal to 99.9%. According to the method, isopropanol is produced through a gas-liquid-
solid reaction,
acetone does not need to be gasified before the reaction, the
reaction temperature is low, the
energy consumption is low, and the product selectivity is high. Compared with a shell-and-tube
fixed bed reactor, the heat insulation
bed reactor made of common stainless steel is low in investment and good in economic benefit.