Method for preparing alkoxy ether compounds

Abstract

The invention discloses a method for preparing alkoxy ether compounds. In the method, heteropoly acid negative ion functionalized ionic liquid as a catalyst, one reaction ingredient is selected from triformol, paraldehyde, methanal or ethanal water solution, another ingredient is selected from methylal, acetal, methanol or alcohol, and the alkoxy ether compounds are synthesized under milder reaction conditions. In the method, the adopted catalyst has high activity, is easy to separate and recover and achieves high reaction conversion rate; the reaction process is simple and convenient, and is easy to operate; in addition, the product distribution is good, and the raw material utilization ratio is high.

Description

technical field [0001] The invention discloses a method for preparing alkoxy ether compounds by catalytic reaction using ionic liquid as a catalyst. Background technique [0002] Alkoxy ether compounds are obtained through acetalization reaction in the presence of an acidic catalyst. Its general formula of molecular structure can be represented by formula (I): [0003] R 2 O(R 1 CHO) m R 2 (I) [0004] Among them, R 1 stands for H or CH 3 ; 2 stands for C n h 2n+1 , n is 1 or 2; m is an integer of 1-11. [0005] The middle part of the molecular structure of this type of compound-(R 1 CHO) m - for oligoaldehyde, R at both ends 2 is a blocked methyl or ethyl group. Methylal CH produced by the condensation of formaldehyde and methanol 3 OCH 2 OCH 3 (DMM), is an alkoxy ether compound widely used in industry, and can be used as a diesel additive. Add 5%-30% DMM to diesel, NO in exhaust gas x The content can be reduced by 7%-10%, and the particle polluti...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings of strong catalyst corrosion, difficult separation, non-recyclable use, and unsatisfactory product distributio

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