Method for synthesizing 4-methylmorpholine N-oxide based on O2 oxidation catalyzed by ruthenium/nitrogen-doped porous carbon

A technology of nitrogen-doped porous carbon and methyl morpholine oxide, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of increasing vacuum distillation and azeotropic distillation separation and purification Pressure, N-methyl morpholine oxide quality impact, N-methyl morpholine oxide low and other problems, to achieve easy separation and purification, suitable for industrial production, and improve the effect of dispersion
CN110467587AActive Publication Date: 2019-11-19SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
Publication Date
2019-11-19

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Abstract

The invention discloses a method for synthesizing 4-methylmorpholine N-oxide based on O2 oxidation catalyzed by ruthenium / nitrogen-doped porous carbon. According to the invention, under the conditionsof a pressure of 0.4-1 MPa and a temperature of 60-90 DEG C, ruthenium / nitrogen-doped porous carbon is used as a catalyst to catalyze a reaction of 4-methylmorpholine with O2 to synthesize 4-methylmorpholine N-oxide, wherein reaction time is 4-8 hours, and the amount of the used catalyst is 0.5 to 5 wt% of the mass of a reaction solution. The method of the invention overcomes the problems of large energy consumption in subsequent separation and wastewater pollution in conventional processes for using synthesizing 4-methylmorpholine N-oxide through H2O2 oxidation. The invention also provides amethod for preparing the ruthenium / nitrogen-doped porous carbon catalyst. The catalyst effectively mildens reaction conditions and improves the activity of 4-methylmorpholine N-oxide synthesized through O2 catalytic oxidation.
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Description

technical field

[0001] The invention belongs to the technical field of catalytic oxidation synthesis, in particular to a catalyst based on ruthenium / nitrogen doped porous carbon 2 A method for the oxidative synthesis of N-methylmorpholine oxide. Background technique

[0002] N-methylmorpholine oxide is an important fine chemical, which is used industrially as a cellulose solvent for the production of superior performance, green and renewable Lyocell fibers. It is understood that the production of 1 ton of Lyocell fiber consumes 64 kilograms of N-methylmorpholine oxide, and the market price of N-methylmorpholine oxide is as high as 30,000 yuan / ton. It can be seen that the development of an efficient synthesis process of N-methylmorpholine oxide has obvious economic benefits, and it also provides raw material support for the rapid development of Lyocell fibers in my country, which is of great practical significance to the development of the textile industry.

[0003] At pres...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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