Method for synthesizing methyl isobutyl ketone and diisobutyl ketone by acetone gas-phase one-step method

A technology of methyl isobutyl ketone and diisobutyl ketone, applied in chemical instruments and methods, preparation of organic compounds, preparation of oxygen-containing compounds, etc., can solve the problems of large number of equipment, large investment, long process flow, etc. , to achieve high activity, simple preparation process, and suitable for large-scale production

Inactive Publication Date: 2010-09-15
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The three-step method has restricted the further development of the process due to the disadvantages of long proce...

Method used

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  • Method for synthesizing methyl isobutyl ketone and diisobutyl ketone by acetone gas-phase one-step method
  • Method for synthesizing methyl isobutyl ketone and diisobutyl ketone by acetone gas-phase one-step method
  • Method for synthesizing methyl isobutyl ketone and diisobutyl ketone by acetone gas-phase one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Use freshly boiled distilled water to prepare 1.0mol / L Pd(NO 3 ) 2 , Mg(NO 3 ) 2 , Al(NO 3 ) 3 and 0.5mol / L of Zr(NO 3 ) 4 Metal salt solution; prepare another 1.0mol / L NaOH solution and 0.5mol / L NaOH solution 2 CO 3 solution. According to the catalyst composition Pd: 1wt%, MgO: 55wt%, Al 2 o 3 : 10wt%, ZrO 2 : 34wt%, four kinds of nitrate solutions of Pd, Mg, Al and Zr are made into a mixed solution, and the solution is denoted as A. Add Na to the beaker beforehand 2 CO 3 Solution [CO 3 2- The molar weight of = 0.5 (Al 3+ +Zr 4+ ) molar weight], solution A and NaOH solution are simultaneously titrated into the beaker, the rate of addition is controlled, and the stirring is continued to keep the pH between 9 and 10. After the dropwise addition, stir and age in a constant temperature water bath at 60°C for 12 hours, wash and centrifuge until the pH is around 7, perform suction filtration, put the filter cake in an oven, and dry at 80°C for 12 hours to o...

Embodiment 2

[0019] The catalyst is the same as in Example 1, the reaction temperature is 180° C., the molar ratio of hydrogen to ketone is 1, and the reaction is carried out under different liquid space velocities. The results are shown in attached table 2.

Embodiment 3

[0021] Catalyst is the same as embodiment 1, and reaction temperature is 180 ℃, and liquid space velocity is 4.8ml / g cat h, react under different hydroketone molar ratios, the results are shown in attached table 3.

[0022] Attached Table 1 Catalytic Performance of Catalysts at Different Reaction Temperatures

[0023]

[0024]

[0025] Attached Table 2 Catalytic Performance of Catalysts at Different Liquid Space Velocities

[0026]

[0027] Schedule 3 Different H 2 / Catalytic performance of the catalyst under acetone

[0028]

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Abstract

The invention relates to a method for synthesizing methyl isobutyl ketone and diisobutyl ketone by an acetone gas-phase one-step method, which relates to a chemical solvent. A Pd/MgO-Al2O3-ZrO2 catalyst is used in the method, comprises the components of 1wt% of Pd, 55wt% of MgO, 10wt% of Al2O3 and 34wt% of ZrO2 and is prepared from a PdMgAlZr four-element houghite compound. under the condition that the reaction temperature is 150-200 DEG C,the liquid air speed is 4.8ml/gcat.h, and the hydrogen-ketone mol ratio is 1, in a fixed bed reactor, the acetone conversion rate is 30-73 percent, and theselectivity of the methyl isobutyl ketone and the diisobutyl ketone respectively reaches 50-60 percent and 23-30 percent. The catalyst has simple preparation process and is suitable for large-scale production. After the ZrO2 is added, the catalyst has proper acid-base property and higher activity. The catalyst can be simultaneously used for preparing the two products of the methyl isobutyl ketoneand the diisobutyl ketone.

Description

technical field [0001] The invention relates to a chemical solvent, in particular to a process method for synthesizing methyl isobutyl ketone and diisobutyl ketone by a gas-phase one-step method from acetone. Background technique [0002] Methyl isobutyl ketone (MIBK) is an excellent medium boiling point solvent with stable chemical properties and can meet the special requirements of high-grade coatings such as solid components, volatilization speed, leveling, coating strength, and appearance. MIBK has Good solubility and excellent miscibility with other solvents and suitable boiling point, widely used as a solvent for the production of high-grade coatings, synthetic p-phenylenediamine rubber anti-aging agents, and also as a solvent for the production of drugs, adhesives and Rare metal extractant. With the rapid development of the automobile industry and high-end coatings, the demand for MIBK continues to increase. [0003] The production method of MIBK is mainly acetone h...

Claims

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Application Information

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IPC IPC(8): C07C49/04C07C45/68C07C27/00B01J23/755B01J23/44
Inventor 申延明刘东斌吴静宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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