A kind of synthetic method of dimethylglyoxime

Abstract

The invention relates to a novel method for synthesizing dimethylglyoxime. The method comprises the following steps: 1) setting the thermostatic reaction temperature to 10-70 DEG C, and adding a catalyst into a solvent ethanol-butanedione mixed liquid, wherein the ethanol is 10-20 times by mass of the butanedione; and 2) adding stronger ammonia water and oxydol into the mixed liquid in the step 1) by 1-3 times within 0.5-1 hour, and reacting for 0.5-6 hours, wherein the mole ratio of the butanedione, oxydol and ammonia water is 1:(2-3.5):(2-4), and the catalyst is a titanium silicon molecular sieve and is 1-4 times by mass of the butanedione. Compared with the prior art, the reaction steps are reduced, thereby implementing one-step synthesis of dimethylglyoxime; the solid powder catalyst can be easily separated from the reaction system, and can be recycled, thereby enhancing the dimethylglyoxime production efficiency to some extent; and the used raw materials have low toxicity and no harm, and the reaction byproduct is water and is almost not hazardous to the environment, thereby satisfying the requirements of green chemical industry.

Description

technical field [0001] The invention relates to a compound with nitrogen and oxygen combination, in particular to a synthesis method of dimethylglyoxime. Background technique [0002] 2,3-Butanedione dioxime (2,3-Butanedione dioxime) is an important chemical reagent, which has important uses in practical production and scientific research. Diacetyl oxime is often used as a chelating agent for the analysis and determination of nickel and palladium; separation of nickel from cobalt and other metals, separation of palladium from tin, gold, rhenium, iridium; and cyanide, nickel, palladium, cobalt, iron Photometric determination of metal ions such as (II) and rhenium (VII). In addition, since the nitrogen atom in the dimethylglyoxime complex is sp2 hybridized, its structure is similar to some biologically important macrocyclic ligands (such as vitamin B12 and myoglobin), and its metal complexes can be used as Model compounds are used in the study of enzymes and catalysts. [0...

AI Technical Summary

Problems solved by technology

[0004] This method has the following disadvantages: (1) the raw material is highly corrosive (sulfuric acid, hydrochloric acid), inflammable and explosive (ethyl nitrite), carcinogenic (sodium nitrite); (2) the involved reaction is a homogeneous reaction, and the step The reaction requires product separation, and the operation is cumbersome; (3) The discharge of three wastes is large and the environmental pollution is serious

However, so far, research work on this aspect has not been reported

Images