Preparation technology of chlorobenzene glyceryl ether
A technology for the preparation of chlorphenesin, which is applied in the direction of ether preparation, ester reaction to prepare ether, organic compound/hydride/coordination complex catalyst, etc., can solve the problem of inability to effectively control the reaction process and obtain chlorphenesin The problems such as instability of the production rate can be solved, and the effect of easy operation, simple preparation method and improved stability can be achieved.
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preparation example 1
[0038] A catalyst, the preparation method is: disperse 7g of fumed silicon dioxide and 5g of vitamin E in 15g of absolute ethanol, then add 5g of alkyl ammonium bromide and stir evenly, heat to 40°C and continue stirring until the absolute alcohol is completely volatilized That is, the catalyst is prepared.
[0039] The alkylammonium bromide is tetrapropylammonium bromide, and the specific surface area of the fumed silica is 350-410m 2 / g, the vitamin E is α-tocopherol.
preparation example 2-3
[0041] Preparation examples 2-3 are all based on preparation example 1, and the difference from preparation example 1 is only that the amount of each raw material is different, see Table 2 for details.
[0042] Preparation example Preparation Example 1 Preparation example 2 Preparation example 3 Fumed silica (g) 7 3 12 Vitamin E(g) 5 10 1 Alkyl ammonium bromide (g) 5 3 7
preparation example 4-6
[0044] Preparation Examples 4-6 are all based on Preparation Example 1, and the only difference from Preparation Example 1 is that the types of alkyl ammonium bromide used are different, see Table 3 for details.
[0045] Preparation example Preparation Example 4 Preparation Example 5 Preparation Example 6 Alkyl ammonium bromide Decyltrimethylammonium bromide Octadecyltrimethylammonium bromide cetyltrimethylammonium bromide
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