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Preparation method of n-iso amyl butyrate

A technology of isoamyl n-butyrate and n-butyraldehyde, which is applied to the preparation of carboxylic acid esters, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of sulfuric acid, etc., and achieve simple process, high yield, The effect of an economical and environmentally friendly preparation method

Inactive Publication Date: 2003-04-16
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

However, other disadvantages of sulfuric acid are not overcome

Method used

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Experimental program
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Embodiment 1

[0011] Embodiment 1-4: the comparison of the synthesis of isoamyl butyrate catalyzed by different catalysts. The experimental conditions are: in a 100ml three-neck bottle, 20ml CH 2 Cl 2 Solvent, catalyst TS-1 (Example 1), Ti-MCM-41 (Example 2), Ti-HMS (Example 3), TAPO-5 (Example 4) 0.2g, CH 3 (CH 2 ) 2 CHO 0.02mol, (CH 3 ) 2 CHCH 2 CH 2 OH 0.08mol, reflux at 20-60°C for 2-16h.

[0012] Catalyst Mole ratio Time Temperature Conversion Selectivity

[0013] (aldehyde:alcohol) (h) (°C) (%) (%)

[0014] 1 TS-1 1.0:4.0 2-3 20-60 100 100

[0015] 2 Ti-MCM41 1.0∶4.0 12 20-60 100 100

[0016] 3 Ti-HMS 1.0:4.0 14 20-60 100 98

[0017] 4 TPAO-5 1.0:4.0 16 20-60 100 96

[0018] 5 - 1.0∶4.0 16 20-60 - -

[0019] Example 5-9 The influence of different molar ratios of reactants on the same catalyst on the reaction results: the experimental conditions are: in a 100ml three-necked bottle, 20ml CH 2 Cl 2 Solvent, Catalyst TS-10.2g, CH 3 (CH 2 ) 2 CHO 0.02m...

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Abstract

A process for preparing isopentyl n-butyrate features that under the existance of catalyst which may be TS-1, Ti-MCM-41, Ti-HMS, or TAPO-5 molecular sieve, the n-butanal and isopentaneol as raw materials take part in reaction at 20-60 deg.c under the reflux condition. Its advantages are high output rate (100%) and no environmental pollution as all the molecular sieve can be recovered.

Description

technical field [0001] The invention relates to a method for preparing isoamyl n-butyrate by using n-butyraldehyde and isoamyl alcohol as raw materials. Background technique [0002] Isoamyl Butyrate is a colorless to pale yellow transparent oily liquid with a sweet smell similar to raw pears and bananas. Natural products exist in coconut oil, cocoa beans, apples, bananas, grapes, strawberries, etc. It is mainly used to prepare cherry, banana, pineapple, apricot and miscellaneous fruit flavors. It is a food flavor allowed by the regulations of GB2760-86 in my country; it can also be used as a solvent for extracting natural flavors, a solvent for cellulose acetate and a plasticizer . Usually it is obtained by the esterification reaction of butyric acid and isoamyl alcohol under the catalysis of sulfuric acid. The reaction time is long, the side reactions are many, the equipment is seriously corroded, the waste water discharge is large, and the post-treatment process is compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/00C07C69/24
Inventor 王晓来赵睿索继栓
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI