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
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[0039] Example 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]
Example Embodiment
[0043] Example 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]
Example Embodiment
[0047] Example 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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