Method for synthesizing methyl isobutyl ketone

A technology of methyl isobutyl ketone and acetone, applied in chemical instruments and methods, preparation of organic compounds, preparation of carbon-based compounds, etc., can solve the problems of high production cost of MIBK, cumbersome methods, high reaction temperature, etc., and achieve suitable Large-scale production, simple production process, and easy preparation

Inactive Publication Date: 2011-09-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Japanese Patent No. 63-19436 uses alumina as a catalyst carrier to synthesize methyl isobutyl ketone, but there are problems such as high reaction temperature, low conversion rate, and poor selectivity of product methyl isobutyl ketone.
Patent CN1069674A uses Pd/molecular sieve catalyst in the synthesis of MIBK from acetone. The disadvantage of this catalyst is that the production process route is long and the method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take blank Al 2 o 3 Carrier 500g, temperature programmed to 450°C, and roasted at constant temperature for 4hr. After cooling to room temperature, the water absorption rate was determined to be 65.0%. Take Al after roasting 2 o 3 100g, immersed in 100ml 0.6mol / L calcium oxalate solution, kept at 25°C for 50min, filtered, dried at 120°C for 6hr, and roasted at 300°C for 4hr. After cooling to room temperature, an equal volume of PdCl was impregnated 2 , immersion temperature 50°C, immersion time 2.0hr, filter, 120°C constant temperature drying 6hr, 300°C roasting, constant temperature 4hr, Pd impregnation amount 0.05%. The catalyst is designated AC-1.

Embodiment 2

[0022] Get the Al after roasting among the embodiment 1 2 o 3 100g, immersed in 100ml 1.0mol / L calcium oxalate solution, kept at 25°C for 50min, filtered, dried at 120°C for 6hr, and roasted at 300°C for 4hr. After cooling to room temperature, an equal volume of PdCl was impregnated 2 , immersion temperature 50°C, immersion time 2.0hr, filter, 120°C constant temperature drying 6hr, 300°C roasting, constant temperature 4hr, Pd impregnation amount 0.05%. The catalyst is designated AC-2.

Embodiment 3

[0024] Get the Al after roasting among the embodiment 1 2 o 3 100g, immersed in 100ml 1.0mol / L calcium oxalate solution, kept at 25°C for 50min, filtered, dried at 120°C for 6hr, and roasted at 300°C for 4hr. After cooling to room temperature, an equal volume of PdCl was impregnated 2 , immersion temperature 50°C, immersion time 2.0hr, filter, 120°C constant temperature drying 6hr, 300°C roasting, constant temperature 4hr, Pd impregnation amount 0.10%. The catalyst is designated AC-3.

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Abstract

The invention relates to a method for synthesizing methyl isobutyl ketone. The method for preparing a Pd-Ca/Al2O3 catalyst comprises the following steps: taking an empty Al2O3 carrier, carrying out programmed heating to 450 DEG C, and roasting for 4 hours while keeping the temperature; taking the roasted Al2O3, impregnating in a calcium salt water solution at 20-80 DEG C for 2-6 hours, filtering, drying, and roasting to obtain modified gamma-Al2O3, wherein the calcium content is 0.10-1.50% by mass of the catalyst; and impregnating the modified gamma-Al2O3 in a palladium chloride solution at 10-80 DEG C for 0.5-4.0 hours, filtering, drying and roasting to obtain the catalyst, wherein the palladium content is 0.03-0.10% by mass of the catalyst. The catalyst has the advantages of low content of metallic palladium, low cost, high utilization ratio, high activity and high selectivity; and the conversion rate of acetone is at least 30.0%, and the selectivity of methyl isobutyl ketone is at least 93.0%.

Description

technical field [0001] The invention relates to a preparation method for synthesizing methyl isobutyl ketone from acetone and hydrogen in one step. Background technique [0002] Methyl isobutyl ketone is an important organic solvent, which is used for dewaxing waxy oil in paints. It is also one of the raw materials for the production of rubber antioxidant 44.20, resin coatings, and has a wide range of uses. [0003] At present, the main method of producing methyl isobutyl ketone is to use acetone and hydrogen as raw materials to synthesize methyl isobutyl ketone in one step. There are many types of catalysts used in this technology. According to reports, the one-step synthesis of methyl isobutyl ketone from acetone is widely used as a Pd / resin catalyst, such as patent US3,953,517. The advantage of this type of catalyst is that the production technology is mature, and the conversion rate and selectivity are also good; The disadvantages are that the temperature resistance is ...

Claims

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Application Information

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IPC IPC(8): C07C49/04C07C45/73B01J23/58
Inventor 田艳明马中义郑翔郑志强侯立波董丽杰赵胤李正
Owner PETROCHINA CO LTD
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