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Preparation method of catalyst for co-generating of isopropanol and diisobutyl ketone through acetone hydrogenation and application

A diisobutyl ketone and catalyst technology, applied in the field of catalysis, can solve the problems of easy loss and high cost, and achieve the effects of suitable acid strength, stable performance, good activity and selectivity

Active Publication Date: 2014-07-23
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of non-precious metal nickel as the active component overcomes the shortcomings of easy loss of active components and high cost of palladium-based catalysts, and can greatly reduce the production costs of isopropanol and DIBK; in addition, due to the selection of inorganic carriers, there is no Pd / resin catalyst in the catalyst. Equipment corrosion problems caused by the loss of sulfonate radicals in the initial stage of operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare catalyst of the present invention

[0027] Mix 200g of alumina and 4g of methyl cellulose for 30 minutes, add 170mL of 3wt% dilute nitric acid solution, mix for 20 minutes, roll the ball in a granulator to form a 3mm ball, dry at 120°C for 12 hours, and bake at 500°C for 4 hours. Prepare the alumina carrier; then dissolve 110g of magnesium nitrate and 305g of nickel nitrate in deionized water to make 800mL of clarified solution, impregnate the alumina carrier, after 12 hours of immersion, filter out the excess filtrate, and the filtrate is for subsequent use. Drying at ℃ for 12 hours, roasting at 450℃ for 3 hours to obtain a semi-finished catalyst; impregnating the semi-finished catalyst in the filtrate again, repeating the series of impregnation, drying, and roasting three times, drying at 120 °C for 12 hours after each dipping, and roasting at 450 °C for 3 hours Hours, the finished catalyst is finally obtained.

[0028] The catalyst number prepared above is A, ...

Embodiment 2~6

[0031] Other catalysts B to F were prepared according to the method of Example 1, except that the calcination temperature of the carrier and the concentration of the metal salt in the impregnation solution were changed. The catalyst preparation conditions and component contents are shown in Table 1.

[0032] Table 1

[0033] example Catalyst number Nickel content, wt% Magnesium content, wt% Carrier calcination temperature, ℃ Carrier roasting time, hours Calcination temperature after impregnation with metal salt, °C Baking time after impregnating nickel nitrate, ℃ 2 B 21.8 8.6 480 3 380 3 3 C 24.6 9.9 450 6 350 3 4 D 22.9 10.2 550 5 450 4 5 E 22.2 11.5 550 5 420 5 6 F 23.5 9.1 580 4 400 6

[0034] Catalysts B~F were loaded into a fixed-bed reactor and reduced in a hydrogen flow. After reduction, the hydrogenation performance of the catalyst was evaluated under selected reaction conditions. The te...

Embodiment 7

[0041] Activity evaluation experiment

[0042] 100 mL of Catalyst A was loaded into a 100 mL fixed-bed reactor respectively, and technical grade acetone was used as raw material, and the acetone content was 98 wt%. The catalyst is first subjected to reduction treatment, the reduction condition is pressure 0.5MPa, temperature 320°C, time 8 hours, reduction atmosphere is H 2 / N 2 The mixed gas, the hydrogen content is 20.0v%, the flow rate of the reducing gas is 200mL / h; after the reduction, the acetone raw material is passed into the hydrogenation reaction, the total reaction pressure is 3.0MPa, the temperature is 180°C, and the liquid-hour volume of the acetone feed Airspeed 0.8h -1 , The volume ratio of hydrogen and acetone is 200, and a long-term operation test of 2000 hours is carried out.

[0043] The test results show that the conversion rate of acetone and the yield of products isopropanol and DIBK are kept very stable, and the activity of the catalyst does not decrea...

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Abstract

The invention provides a preparation method of a catalyst for co-generating of isopropanol and diisobutyl ketone through acetone hydrogenation and an application. The preparation method is characterized in that the catalyst comprises an alumina carrier as well as Ni and Mg loaded on the gamma-Al2O3 carrier; in terms of total weight of the catalyst, the catalyst comprises 20-25% of Ni and 8-12% of Mg; the preparation method comprises the following procedures of 1) carrier preparation: taking a pseudo-boehmite powder body; adding a certain quantity of adhesives and extrusion assisting agents to the pseudo-boehmite powder body; extruding a mixture into strips or rotationally granulating the mixture; and drying and roasting the mixture so as to obtain the carrier; 2) impregnation of magnesium nitrate and nickel nitrate: impregnating the carrier in the magnesium nitrate and the nickel nitrate for 10-24 hours at room temperature; taking out the carrier after filtering the carrier; drying and roasting the carrier; and then naturally cooling the carrier; and 3) repeating of the step 2): using a magnesium nitrate and nickel nitrate impregnation liquor obtained in the step 2); impregnating a semi-finished product obtained in the step 2) in the impregnation liquor; and repeating the impregnating, drying and roasting process for at least three times according to the step 2) so as to obtain a catalyst finished product. The invention further relates to a catalytic application of the catalyst, which is prepared by the preparation method, used for co-generating the isopropanol and the diisobutyl ketone through acetone hydrogenation.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and relates to a preparation method and application of a catalyst for hydrogenation of acetone for co-production of isopropanol and diisobutyl ketone. More specifically, the invention relates to hydrogenation of acetone with nickel as the main active component of the catalyst The invention discloses a catalyst preparation method for synthesizing isobutanol and methyl isobutyl ketone and its application. Background technique [0002] Isopropanol is an important chemical product and raw material. It is mainly used as dehydrating agent and cleaning agent in pharmaceutical, cosmetics, plastics, spices, coatings and electronic industries. Isopropanol is used as a low-cost solvent and as an extractant in many industrial and consumer products. Isopropanol is also used as a solvent for oils and colloids, and in the manufacture of fishmeal feed concentrates. Additionally, low-quality isopropanol is u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C07C31/10C07C29/145C07C49/04C07C45/73
Inventor 于海斌南军张景成耿姗张玉婷曲晓龙刘新普
Owner CHINA NAT OFFSHORE OIL CORP
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