Modified aliphatic water reducer containing waste residues in phenol production process

Abstract

The invention provides a modified aliphatic water reducer containing waste residues in the phenol production process and relates to the field of building materials. The modified aliphatic water reducer is prepared from the following components in parts by weight: 300-500 parts of water, 110-180 parts of sodium nitrite, 230-280 parts of formaldehyde, 50-80 parts of the waste residues in the phenolproduction process and 85-105 parts of acetone. A synthetic method comprises the following steps of (1) weighing the raw materials in parts by weight; (2) adding water into a four-mouth flask, addingthe sodium nitrite while stirring, feeding the waste residues in the phenol production process after uniform stirring and mixing, performing continuous reaction for 30 minutes, weighing the acetone ina constant-pressure funnel after reaction is finished, controlling a dropwise adding speed of the acetone, finishing dropwise adding for 20-30 minutes, performing stirring for continuous reaction for30 minutes after dropwise adding is finished, starting to dropwise adding the formaldehyde, controlling a dropwise adding speed of the formaldehyde, finishing dropwise adding for 2-3 hours, performing heating to 95 DEG C after dropwise adding is finished, performing continuous insulation reaction for 3-4 hours, and descending the temperature after insulation is finished. The modified aliphatic water reducer provided by the invention solves the environmental protection problem and also creates the economic benefit.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a modified aliphatic water reducer containing waste residues in the production process of phenols. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. [0003] The waste residue produced during the synthesis of phenol or phenolic compounds or a small amount of residual mother liquor contains cumene, phenol, acetone, phenolic compounds and other substances, which are hazardous wastes and cannot be discharged directl...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a modified aliphatic water reducer containing waste residues in the production process of phenols, which not only solves the problem of environmental protection, but also creates economic benefits

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