Optimization of Microwave Radiation Preparation of Maleic Anhydride Superplasticizer by Response Surface Methodology

Abstract

The invention discloses a method for preparing a maleic anhydride high-efficiency water reducer by optimizing microwave radiation by response surface method. It uses allyl polyoxyethylene ether and sodium methacrylate sodium sulfonate as raw materials, stirs and mixes them evenly with water. Heating to the reaction temperature under certain conditions, then adding maleic anhydride and ammonium persulfate at a constant temperature to react for a period of time, using the response surface method to set the variable parameters of the reaction, cooling after the reaction, and adjusting the pH to obtain a maleic anhydride-based high-efficiency water reducer . On the basis of single factor analysis, the present invention uses response surface method to optimize the synthesis process of maleic anhydride superplasticizers, and draws the process conditions that are more suitable for preparing maleic anhydride superplasticizers. The development and popularization provide scientific test basis.

Description

technical field [0001] The invention belongs to the field of preparation of water reducers, and in particular relates to a method for preparing maleic anhydride high-efficiency water reducers by optimizing microwave radiation with a response surface method. Background technique [0002] Maleic anhydride contains acid anhydride groups and carbon-carbon double bonds. This molecular configuration is conducive to the generation of conjugation effects, making the double bonds (-C=C-) easy to copolymerize with olefin monomers, such as sodium methacrylate , acrylic acid, allyl polyoxyethylene ether, styrene and other monomers, and maleic anhydride as a ring structure, because of the carbonyl electron-withdrawing induction effect in the molecule and the steric hindrance effect of the double-substituted group, make it Homopolymerization is difficult. Therefore, compared with active olefins that are prone to homopolymerization, the low activity of maleic anhydride can effectively pre...

AI Technical Summary

Problems solved by technology

At present, in the development of high-efficiency water reducers, such as CN201210274917.1, the orthogonal experiment method is used to screen out the significant factors affecting the index and give the best factor level combination, but it is impossible to find the best combination of factors in the entire area And the shortcomings of the response value, and mostly use the linear model, there are deviations from the actual situation, the accuracy is not high, etc.

Images