Method for preparation of isopropanol through acetone hydrogenation
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A technology for the preparation of isopropanol and hydrogen, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problem of low selectivity of isopropanol, achieve selectivity improvement, and increase the content of metal active components Low, cost reduction effect
Inactive Publication Date: 2015-09-23
CHINA PETROLEUM & CHEM CORP +1
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[0007] The technical problem to be solved by the present invention is the low selectivity of isopropanol in the existing technology of hydrogenation of acetone to isopropanol, and a new method for preparing isopropanol by hydrogenation of acetone is provided
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Embodiment 1
[0017] Acidification treatment method of silica carrier: Add 100g of silica to 2L of 0.5mol / l hydrochloric acid, treat at 80°C for 2 hours, then filter, then treat twice as above, and finally at 100°C Dry in an oven for 24 hours to obtain an acidified silica carrier. After ammonia temperature programmed desorption measurement, the amount of acid contained in the carrier is 0.05×10 -3 mol / g.
[0018] Weigh 30g of acidified silica and put it into 70ml of nickel nitrate solution with a weight fraction of 65% for immersion for 3 hours, then dry it in an oven at 120°C for 24 hours, bake it at 300°C for 6 hours, and finally pass 1,1, 3,3-Tetramethyldisilazane was treated at 160 °C.
[0019] The prepared catalyst has a nickel content of 30% and an organic silicon content of 2%, which is denoted as A-1.
[0020] Put catalyst A-1 into a fixed-bed reactor, pass through acetone and hydrogen, at 180°C, 3.0MPa, acetone space velocity for 1 hour -1 The catalytic hydrogenation performanc...
Embodiment 2
[0022] Put the catalyst A-1 described in [Example 1] into a fixed-bed reactor, feed acetone and hydrogen, at 160°C, 3.0MPa, and acetone space velocity for 1 hour -1 The catalytic hydrogenation performance of the catalyst was evaluated. The test results are shown in Table 1.
Embodiment 3
[0024] Put the catalyst A-1 described in [Example 1] into a fixed-bed reactor, feed acetone and hydrogen, at 160°C, 1.5MPa, acetone space velocity for 1 hour -1 The catalytic hydrogenation performance of the catalyst was evaluated. The test results are shown in Table 1.
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Abstract
The invention relates to a method for preparation of isopropanol through acetone hydrogenation, and is used for mainly solving the problem of low isopropanol selectivity in the prior art. The problem is better solved by adopting the technical scheme that in the presence of hydrogen, with acetone as raw material, under conditions of the reaction temperature of 80-180 DEG C, the pressure of 1.0-4.0 MPa, the acetone weight space velocity of 0.1-5 h<-1> and the acetone-to-hydrogen molar ratio of 1 to (1-4), and in a fixed bed reactor containing a catalyst, acetone and hydrogen are subjected to a reaction to generate isopropanol; and the catalyst includes the following components in parts by weight: a) 40-97.5 parts of a silica carrier treated by an acid, b) 0.5-60 parts of a nickel element or an oxide thereof loaded on the silica carrier, and c) 0.01-2 parts of organic silicon. The method can be used in industrial production of preparation of isopropanol through acetone hydrogenation.
Description
technical field [0001] The invention relates to a method for preparing isopropanol by hydrogenating acetone. Background technique [0002] The production of isopropanol can be obtained by hydration of propylene, such as the direct hydration method using cation exchange resin catalyst. [0003] In recent years, the output of acetone is constantly increasing, but due to the production method of methyl methacrylate has been changed by C 4 The tendency of distillate direct oxidation to replace acetone cyanohydrin method, and the continuous reduction of the amount of acetone as a solvent narrows the application range of acetone. Therefore, it is of great significance to convert acetone into isopropanol fine chemicals. [0004] Catalysts for the hydrogenation of acetone to prepare isopropanol include: Raney Ni catalyst, Ru / C catalyst, Ru / Al 2 o 3 Catalyst, copper chromium catalyst. Acetone is hydrogenated on the above types of catalysts, and a fixed-bed reactor is generally us...
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