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Method for preparing Ni/MgO-Al2O3 catalyst for coproduction of methylisobutylketone and diisobutylketone

A technology of methyl isobutyl ketone and diisobutyl ketone, which is applied in the field of synthesizing methyl isobutyl ketone, can solve the problems of difficult catalyst regeneration, long process flow, and harsh operating conditions, and is suitable for large-scale The effect of simple production and preparation process

Inactive Publication Date: 2011-12-21
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three-step method has restricted the further development of the process due to the disadvantages of long process flow, large number of equipment, and large investment.
In the process of preparing MIBK by hydrogenation of acetone, the widely used catalyst is Pd / resin catalyst, but this type of catalyst has poor thermal stability, difficult catalyst regeneration, harsh operating conditions, and the active component of the catalyst is noble metal

Method used

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  • Method for preparing Ni/MgO-Al2O3 catalyst for coproduction of methylisobutylketone and diisobutylketone
  • Method for preparing Ni/MgO-Al2O3 catalyst for coproduction of methylisobutylketone and diisobutylketone
  • Method for preparing Ni/MgO-Al2O3 catalyst for coproduction of methylisobutylketone and diisobutylketone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Use freshly boiled distilled water to prepare 1.0mol / L Mg(NO 3 ) 2 , Al(NO 3 ) 3 Metal salt solution; prepare another 1.0mol / L NaOH solution and 0.5mol / L NaOH solution 2 CO 3 solution. According to the Mg / Al molar ratio of 2:1, the nitrate solution of Mg and Al was made into a mixed solution, and the solution was designated as A. A certain amount of Na was added to the beaker in advance 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 stirred 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 obtain MgAl water Talc compound. The prepared MgAl hydrotalcite precursor was placed in a muffle furnace ...

Embodiment 2

[0021] 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

[0023] 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.

[0024] Attached Table 1 Catalytic performance at different reaction temperatures

[0025]

[0026] Note: IPA-isopropanol, MIBC-methyl isobutyl carbinol, DIBC-diisobutyl carbinol, DIBK-diisobutyl ketone, DAA-diacetone alcohol, C 9+ - Isophorone, mesitylene and other high-boiling compounds containing 9 carbons or more.

[0027] Attached Table 2 Catalytic performance at different liquid space velocities

[0028]

[0029]

[0030] Note: Please refer to Attached Table 1 for symbols in the table.

[0031] Schedule 3 Different H 2 / Catalytic performance under ketone

[0032]

[0033] Note: Please refer to Attached Table 1 for symbols in the table.

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Abstract

The invention discloses a method for preparing a Ni / MgO-Al2O3 catalyst for coproduction of methylisobutylketone and diisobutylketone, and relates to a chemical solvent. In the method, a Ni / MgO-Al2O3 catalyst is used, the catalyst consists of 4 weight percent of Ni, 53 weight percent of MgO and 43 weight percent of Al2O3, and the catalyst is prepared from a reconfigured NiMgAl hydrotalcite-like compound at the reaction temperature of between 150 and 240 DEG C at the liquid space velocity of 2.4 to 4.8 ml / gcat.h in a molar ratio of hydrogen to ketone of 0.5-2; and in a fixed bed reactor, the conversion rate of acetone is 30 to 56 percent, and the selectivity of the methylisobutylketone reaches 57 to 69 percent. Ni<2+> of the Ni / MgO-Al2O3 catalyst prepared by a reconfigured hydrotalcite-like method is mainly distributed on the surface of the catalyst, is easy to reduce, is used in the reaction of synthesizing MIBK by an acetone gas phase one-step method, and has high catalytic performance.

Description

technical field [0001] The invention relates to a chemical solvent, in particular to a process method for synthesizing methyl isobutyl 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. The production method of MIBK is mainly acetone hydrogenation method. The react...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C07C49/04C07C45/74C07C45/73
Inventor 申延明刘东斌吴静宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY