Method for synthesizing methyl isopropyl ketone

A kind of technology of methyl isopropyl ketone and synthesis method, applied in the field of synthesis of methyl isopropyl ketone, can solve the problems of low conversion rate of raw materials, large pollution and the like

Inactive Publication Date: 2011-05-11
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a synthetic method of methyl isopropyl ketone to solve the problems of low conversion rate of raw materials and large pollution in production

Method used

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  • Method for synthesizing methyl isopropyl ketone
  • Method for synthesizing methyl isopropyl ketone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh 22.69 grams of lanthanum nitrate solid and place it in a beaker, add 15 ml of distilled water to dissolve it, then weigh 42 grams of titanium-aluminum composite carrier and add it to the above solution, soak at room temperature for 6 hours, dry in an oven at 120 °C for 4 hours, and finally Catalyst A was obtained by calcining in a muffle furnace at 550°C for 5 hours.

Embodiment 2

[0012] Weigh 15.56 grams of lanthanum nitrate solid and place it in a beaker, add 15 ml of distilled water to dissolve it, then weigh 42 grams of titanium-aluminum composite carrier and add it to the above solution, soak for 6 hours at room temperature, dry in an oven at 120 °C for 4 hours, and finally Catalyst B was obtained by calcining in a muffle furnace at 550°C for 5 hours.

Embodiment 3

[0014] Weigh 22.69 grams of lanthanum nitrate solid and place it in a beaker, add 32 ml of distilled water to dissolve it, then weigh 42 grams of alumina carrier and add it to the above solution, soak it at room temperature for 6 hours, dry it in an oven at 120 ° C for 4 hours, and finally 550 ℃ in a muffle furnace for 5 hours to obtain catalyst C.

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Abstract

The invention relates to a method for synthesizing methyl isopropyl ketone, which is characterized in that rare earth oxides are loaded on an aluminum oxide, titanium oxide or titanium-aluminum compound carrier to be used as a synthesis catalyst, wherein rare earth elements in the rare earth oxides are lanthanum, cerium, praseodymium and neodymium, the loading capacity of the rare earth metals is 3-20%, and the molar ratio of titanium to aluminum in the carrier is 0.2-0.5. A preparation method of the catalyst comprises the following steps of: weighing a certain amount of nitrates of rare earth metal oxides to prepare a uniform solution; then, adding a certain amount aluminum oxide, titanium oxide or titanium-aluminum compound carrier into the solution, and impregnating for 5-10h at 25 DEG C; vacuumizing and drying for 3-6h at 120 DEG C, and roasting for 4-8h at 450-700 DEG C in a muffle furnace to obtain the catalyst. Methyl isopropyl ketone is synthesized by using isobutyric acid and acetic acid as synthesis raw materials under the conditions that the reaction temperature is 420-440 DEG C and the liquid hourly space velocity is 0.5-0.8 g.g<-1>.h<-1>, and the molar ratio of isobutyric acid to acetic acid is 0.8-1.2:1. The reaction process is as follows: a raw material mixture is pumped into a fixed bed reactor through a charging pump, and the content of the products is analyzed by using gas chromatography after the raw material mixture reacts in a catalyst bed.

Description

technical field [0001] The invention relates to the technical field of fine organic synthesis, and relates to a method for synthesizing methyl isopropyl ketone. Background technique [0002] Methyl isopropyl ketone, referred to as MIPK, is mainly used in the manufacture of dye intermediates, lubricating oil dewaxing, extraction and separation of precious metals, rosin extractants, adhesives, wool anti-shrinkage agents, chromatographic separation agents, emulsion polymerization additives, organic Synthetic raw materials, etc. The synthesis routes of methyl isopropyl ketone mainly include: ethyl acetate-isobutyraldehyde method, isobutyraldehyde-acetic acid method, methyl ethyl ketone-methanol method, tert-amyl alcohol-bromine method, isoprene method, etc. At present, the methods that have been industrialized mainly include isobutyraldehyde-acetic acid method, isobutyric acid-acetic acid method, methyl ethyl ketone-methanol method, and isoprene method. The method of the inven...

Claims

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Application Information

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IPC IPC(8): B01J23/10C07C49/04C07C45/48
Inventor 李佳于海斌陈永生李孝国赵讯志隋芝宇
Owner CHINA NAT OFFSHORE OIL CORP
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