Method for preparing ethylene glycol ether

Abstract

The invention relates to a glycol ether preparation method, mainly solving the problems of the original technique that the target product, glycol ether, has low selectivity, high alcohol / epoxy ethane ratio (alcohol / alkyl ratio) and no concern on catalyst stability. The invention uses epoxy ethane and lower fatty alcohol as raw materials, adopts niobium oxide as a main activated component, and chooses at least one of elements or compounds of V, Mo, Sn, Pb, La, Pr, Nd as auxiliary agent to form catalyst, so as to prepare glycol ether under the reaction temperature of 100 to 300 DEG C, reaction pressure of 0.1 to 3.0MPa, alcohol / alkyl ratio of 1-5: 1, and reaction time of 30 minutes to 8.0 hours. The technical proposal can well solve the problem and can be used for the industrial production of the glycol ether.

Description

technical field

[0001] The invention relates to a method for preparing glycol ethers, in particular to a method for preparing glycol ethers by reacting ethylene oxide with low-carbon fatty alcohols. Background technique

[0002] Glycol ether series products have both ether bonds and different alkyl groups in their molecules, so they can dissolve small organic molecules, macromolecules, synthetic or natural polymer substances, and can also be soluble in water or water to varying degrees. The compounds are soluble in each other, so they are widely used as solvents, antifreeze agents, brake fluids, cleaning agents, chemical intermediates, etc.

[0003] Glycol ether series products are mainly etherified by ethylene oxide (EO) and low-carbon fatty alcohols to obtain corresponding glycol ethers and a small amount of diethylene glycol ether and triethylene glycol ether. The synthesis principle is as follows:

[0004]

[0005] When there is no catalyst, it can be carried out at ...

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