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Storage method of acetoin

A technology of acetoin and acetic acid, which is applied in the field of storage that effectively reduces the decomposition of acetoin, can solve the problems of decreased purity of acetoin, short shelf life, and accelerated rapid decomposition of acetoin monomers, etc., to achieve the effect of improving storage time

Active Publication Date: 2020-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of the preparation method, because of the active chemical properties of the acetoin molecule itself, it is easy to decompose at room temperature (reverse reaction of acetoin condensation) to generate acetaldehyde, and then generate acetic acid. When the concentration of acetic acid exceeds a certain concentration, the synthesis of acetoin will be accelerated The rapid decomposition of the body, resulting in a rapid decline in the purity of acetoin
In addition, when the acid value reaches a certain value, the acetoin monomer is prone to oxidation reaction to generate 2,3-butanedione, resulting in a shorter shelf life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Place the acetoin monomer Z prepared by the dehydrogenation method under light conditions for 10 days, and measure the mass content of acetic acid to be 0.28% to obtain acetoin monomer A-1; (2) make A -1 at 0.1MPa, 85°C, liquid space velocity 0.1 h -1Under the same conditions, the acetoin monomer B-1 was obtained through an adsorption exchange bed filled with Ca / FER molecular sieves, and the Ca of B-1 was measured by ICP 2+ The content was 117 μg / g; (3) Seal B-1 in a narrow bottle to obtain a sample of C-1, and store it at room temperature. The changes of various indicators of the C-1 sample with the storage time were measured, and the results are listed in Table 2.

[0041] surface

[0042]

Embodiment 2

[0044] (1) Add an appropriate amount of analytically pure acetic acid to the acetoin monomer Z prepared by the dehydrogenation method to prepare acetoin monomer A-2 with a mass content of 0.12% acetic acid; (2) make A-2 at 0.5 MPa, 50℃, liquid space velocity 0.01 h -1 Under the same conditions, the acetoin monomer B-2 was obtained through an adsorption exchange bed filled with Ca / FER molecular sieves, and the Ca of B-2 was measured by ICP 2+ The content was 163 μg / g; (3) The sample of C-2 was obtained by sealing B-2 in a narrow bottle and stored at room temperature. The changes of various indicators of the C-2 sample with the storage time were measured, and the results are listed in Table 3.

[0045] table 3

[0046]

Embodiment 3

[0048] (1) Place the acetoin monomer Z prepared by the dehydrogenation method under light conditions for 5 days, and measure the mass content of acetic acid to be 0.21%, to obtain the acetoin monomer A-3; (2) make A -3 at 0.1MPa, 75°C, liquid space velocity 0.05 h -1 Under certain conditions, the acetoin monomer B-3 was obtained through an adsorption exchange bed filled with Ca / FER molecular sieves, and the Ca of B-3 was measured by ICP 2+ The content was 193 μg / g; (3) Seal B-3 in a narrow bottle to obtain a sample of C-3, and store it at room temperature. The changes of various indicators of the C-3 sample with the storage time were measured, and the results are listed in Table 4.

[0049] Table 4

[0050]

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Abstract

The invention discloses a storage method of acetoin. The storage method comprises the following steps: (1) obtaining acetoin containing acetic acid; (2) enabling the acetoin monomer containing aceticacid to pass through an adsorption exchange bed layer filled with a calcium ion exchange molecular sieve to obtain an acetoin monomer B; and (3) sealing and storing the acetoin monomer B. The method can effectively reduce acetoin decomposition and prolong acetoin storage time.

Description

technical field [0001] The invention relates to a storage method of acetoin, in particular to a storage method capable of effectively reducing the decomposition of acetoin. Background technique [0002] Acetoin, also known as 3-hydroxybutanone, naturally exists in many foods such as corn, grapes, apples, meat, etc. It is a widely used food spice with a pleasant creamy aroma and is a commonly used spice in the world Variety, mainly used for the production of flavors such as cream, dairy products, yogurt and strawberry type. my country's standard GB2760-86 stipulates that it is a food spice that is allowed to be used. Acetoin is also a key intermediate in the synthesis of 4-chloro-4,5-dimethyl-1,3-dioxolan-2-one (CDMDO), which can be used for the modification of many drugs, and can greatly improve Drug efficacy, reduce side effects of drugs, such as intermediates for the synthesis of cardiovascular drug olmesartan, penicillin drug lenamcillin and fluoroquinolone antibacteria...

Claims

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Application Information

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IPC IPC(8): C07C45/86C07C45/78C07C49/17
CPCC07C45/86C07C45/78C07C49/17
Inventor 马会霞周峰乔凯翟庆铜张淑梅
Owner CHINA PETROLEUM & CHEM CORP
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