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Preparation method for tert-butyl acetate

A technology of tert-butyl acetate and acetic acid, applied in the field of preparation of tert-butyl acetate, can solve problems such as low mechanical strength, and achieve the effects of reducing costs, suppressing side reactions, and reducing the amount of water used

Inactive Publication Date: 2011-07-06
SK INNOVATION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in the reaction with water, there is a problem of low mechanical strength when using zeolite as a catalyst

Method used

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  • Preparation method for tert-butyl acetate
  • Preparation method for tert-butyl acetate
  • Preparation method for tert-butyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The tubular reactor was filled with 10 ml of Amberyst-15 catalyst, and the olefin mixture with four carbon atoms and acetic acid were injected through the HPLC pump at a volume space velocity of 10 / h. The volume percentage of isobutene in the olefin is 50%, the other components are n-butane, isobutane, 1-butene and 2-butene, and the used olefin mixture is the mixture from which butadiene has been extracted. The ratio of isobutene to acetic acid in the olefin is 1:4. A water bath (Bath) was used to maintain the reaction temperature at 35° C., and a Back Pressure Regulator (Back Pressure Regulator) was installed in the reservoir (Reservior) at the rear end of the reactor to adjust the pressure to 10 atmospheres. The storage tank is cooled with dry ice so that the reacted olefins with four carbon atoms and hydrocarbons can be condensed without loss. The reaction product was analyzed by gas chromatography (GC).

Embodiment 2

[0043] Under the same conditions as in Example 1, a porous surface-modified zeolite was used as the catalyst, and the zeolite was obtained by introducing 10 mol% of sulfonic acid groups into mordenite.

Embodiment 3

[0045] Under the same conditions as in Example 1, water of 5 mol % of isobutene content was mixed in acetic acid.

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Abstract

The invention provides a method of preparing tert-butyl acetate by reacting an alkene compound with acetate, wherein the number of the carbon atoms of the alkene compound is four.In particular, the alkene compound with four carbon atoms is obtained from the naphtha cracking process, wherein the volume percentage of isobutene in the above compound is 30-60%.During the reaction of the above alkene compound with acetate, isobutene is selected to be subject to the reaction to obtain tert-butyl acetate of high purity.According to the preparation method, the concentration of 1-butylene in the above alkene mixture is improved and 1-butylene is more easily to be separated in subsequent processes.Index words: alkene esterification reaction, tert-butyl acetate, alkene mixture and solid acid.

Description

technical field [0001] The invention relates to a method for preparing tert-butyl acetate (tert-Butylacetate) by direct esterification reaction of an olefin mixture with four carbon atoms and acetic acid under the catalysis of a solid acid. Background technique [0002] Tert-butyl acetate has a relatively low value of maximum incremental reactivity (Maximum Incremental Reactivity, MIR), which is the measurement index of its photoreaction performance in generating ozone in the atmosphere, so it is not included in the volatile organic compounds. The above-mentioned volatile organic compounds are liquid or gaseous organic compounds that can easily evaporate into the atmosphere due to high vapor pressure, and can generate photochemical oxidizing substances in the atmosphere to cause photochemical smog. In addition, it is considered to be a substance that causes air pollution and is also a carcinogen and a cause of global warming. Therefore, it is subject to policy management in ...

Claims

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Application Information

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IPC IPC(8): C07C69/14C07C67/04
CPCB01J20/16B01J31/08C07C67/04C07C69/22C07C2531/12
Inventor 洪承权朴载煐郑起男
Owner SK INNOVATION CO LTD
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