Synthesis method of N, N, N'-trimethyl-N'-hydroxyethyl diaminoethyl ether

Abstract

The invention discloses a synthesis method of N, N, N'-trimethyl-N'-hydroxyethyl diaminoethyl ether. The synthesis method comprises the following steps of: in a solvent I, adopting dimethylaminoethoxyethanol as a raw material, and under a catalytic system of 2, 2, 6, 6-tetramethyl piperidinoxide-FeCl3-tertbutyl nitrite, utilizing oxygen gas to oxidize the dimethylaminoethoxyethanol into 2-[2-(dimethylamino)ethoxy]acetaldehyde; in a solvent II, mixing N-methylethanolamine with the 2-[2-(dimethylamino) ethoxy]acetaldehyde, adopting Raney Ni as a catalyst, adopting the above mixture as a reactionsystem to carry out hydrogenation and amination, and preparing the N, N, N'-trimethyl-N'-hydroxyethyl diaminoethyl ether. The N, N, N'-trimethyl-N'-hydroxyethyl diaminoethyl ether synthesized by adopting the synthesis method has the characteristics of simple process, low cost, high yield and less pollution.

Description

technical field [0001] The invention belongs to the polyurethane industry, and mainly relates to the synthesis of a polyurethane catalyst, that is, the synthesis method of N, N, N'-trimethyl-N'-hydroxyethyl bisaminoethyl ether. Background technique [0002] N, N, N'-trimethyl-N'-hydroxyethyl bisaminoethyl ether belongs to low-odor foaming catalyst, and its main synthesis methods are as follows: [0003] 1. Patents JP2009215386 and CN101104674 report a kind of N,N'-trimethyl-N'-hydroxyethylbisaminoethyl ether prepared from N,N,N'-trimethyl-bisaminoethyl ether Ether, but the source of N, N, N'-trimethyl-bisaminoethyl ether is inconvenient, which is not conducive to the industrial production of this method. Moreover, the method prepares the target product by reacting the above-mentioned raw materials with acrylonitrile, which is highly toxic and environmentally unfriendly. [0004] 2. Patent CN105884629 reports a kind of N, N, N'-trimethyl-N'-hydroxyethyl bisamino produced by...

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Problems solved by technology

[0003] 1. Patents JP2009215386 and CN101104674 report a kind of N,N'-trimethyl-N'-hydroxyethylbisaminoethyl ether prepared from N,N,N'-trimethyl-bisaminoethyl ether Ether, but N, N, N'-trimethyl-bisaminoethyl ether source is inconvenient, is unfavorable for the industrialized production of this method

And this method prepares target product with above-mentioned raw material and acrylonitrile reaction, and acrylonitrile is highly toxic, and environment is unfriendly

[0004] 2. Patent CN105884629 reports a kind of N, N, N'-trimethyl-N'-hydroxyethyl bisamino produced by chlorination and nucleophilic substitution using dimethylethanolamine and N-methyldiethanolamine as raw materials Ethyl ether, this method needs to consume a large amount of alkali, and the use of thionyl chloride produces a large amount of waste gas, the atom economy is low, and the nucleophilic substitution requires an equivalent amount of sodium hydroxide as an acid-binding agent to generate an equivalent salt, and the resulting salt is post-treated Complex and high cost; little application value in industrial production

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