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ChemicalBook CAS DataBase List 2,4,6,8-Tetramethyl-1,3,5,7-Tetraoxacyclooctane
108-62-3

2,4,6,8-Tetramethyl-1,3,5,7-Tetraoxacyclooctane synthesis

2synthesis methods
In a 1000-liter reactor, 560 kg of acetaldehyde at 0°C is put in, and about 40 kg of ether is added and cooled to . -15°C. The prepared acid catalyst, i.e., about 4 kg of hydrochloric acid, about 1 kg of ether, about 1 kg of pyridine, about of brominal.
-

Yield:108-62-3 15.1%

Reaction Conditions:

with aluminum oxide;caesium carbonate in diethyl ether at -5 - 10;Large scale;Reagent/catalyst;Temperature;

Steps:

6 Example 6
Filled with heterogeneous solid heteropolyacid supported catalyst cesium carbonate,30 kg of acetaldehyde was put into the fixed bed reactor with γ-Al 2 O 3 ,1.5kg of ether, cooled to -5 ° C, began the reaction, the temperature during the reaction was controlled at 10 ° C,After the reaction is completed, the mixture is filtered, and the solid is washed with water and dried to obtain tetraacetaldehyde, and the content is 99.3%.The yield was 15.1%. The filtrate is distilled, sulfuric acid is added as a catalyst, the paraldehyde in the filtrate is depolymerized, and acetaldehyde and diethyl ether are separated by distillation, and the next time the feed is taken.

References:

Jiangsu Nuoen Crop Science Co., Ltd.;Meng Xianfeng CN109608430, 2019, A Location in patent:Paragraph 0016; 0017; 0018; 0019; 0020; 0021-0041

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