Process for synthesizing concrete water reducer by emissions and secondary products during production of bibenzyl

Abstract

The invention discloses a process for synthesizing a concrete water reducer by emissions and secondary products during the production of bibenzyl, which is characterized in that waste sulfuric acid catalyst produced during the production of bibenzyl, waste water containing soda discharged during alkali washing neutralization process and the secondary products, namely the high-boiling residue foots at the bottom of a kettle and produced during the distillation of the product are adopted as the main materials, concentrated sulfuric acid, water, methyl aldehyde and alkali are added for reaction so as to synthesize the concrete water reducer, wherein the mass ratio of batching of the waste sulfuric acid catalyst, the high-boiling residue foots and the waste water containing soda is (60-70):(130-145): (80-90); the process comprises the following specific steps: mixing the waste sulfuric acid catalyst produced during the production and synthesis of bibenzyl and the secondary products, namely the high-boiling residue foots, which are produced during the distillation; adding concentrated sulfuric acid dropwise for sulfonation; cooling and adding water for hydrolyzation; adding methyl aldehyde dropwise for condensation; then adding water containing soda and the waste water containing soda discharged during alkali washing neutralization process and during the production and synthesis of bibenzyl for neutralization to obtain the water reducer. The synthesized concrete efficient water reducer of the invention is cheap and very good.

Description

technical field [0001] The invention belongs to the technical field of synthesizing high-efficiency water reducers for concrete, and in particular relates to waste sulfuric acid catalysts, neutralized waste alkaline water and by-products produced in the production process of diarylethane: high boiling at the bottom of the rectification process The main raw material is "oil foot", which is compounded with concentrated sulfuric acid, water, formaldehyde, and alkali through sulfonation, hydrolysis, condensation, neutralization, and various processes to synthesize a high-efficiency water reducer for concrete. Background technique [0002] Diaryl ethane is the leading product of synthetic insulating oil for power capacitors at home and abroad, and it is also the most important leuco dye solvent for carbonless copying paper. With the rapid development of the electric power industry and the social demand for carbonless copying paper Increasingly, diarylethane has become an importan...

AI Technical Summary

Problems solved by technology

It not only completely solves the resource utilization problem of the pollutants discharged by the traditional sulfuric acid catalyst, but also makes the whole production process achieve zero discharge, and greatly improves the application value of the by-product "oil foot", and the effect is satisfactory.