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A 2-aminophenol-4-sulfonic acid production waste liquid modified sulfamic acid-based high-efficiency water reducer

A sulfamic acid-based, high-efficiency water-reducing agent technology is applied in the field of cement admixture production, which can solve the problems of high cost and weak practical applicability, reduce the cost of raw materials, realize waste utilization, and improve dispersing ability and water-reducing rate. Effect

Active Publication Date: 2018-07-20
ANHUI XIN SOLID ENVIRONMENTAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing sulfamic acid-based high-efficiency water reducers on the market are too expensive and weak in practical application

Method used

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  • A 2-aminophenol-4-sulfonic acid production waste liquid modified sulfamic acid-based high-efficiency water reducer
  • A 2-aminophenol-4-sulfonic acid production waste liquid modified sulfamic acid-based high-efficiency water reducer
  • A 2-aminophenol-4-sulfonic acid production waste liquid modified sulfamic acid-based high-efficiency water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A 2-aminophenol-4-sulfonic acid production waste liquid modified aminosulfonic acid-based superplasticizer, comprising the following raw materials in parts by weight:

[0026]

[0027]

[0028] Its preparation method comprises the following steps:

[0029] (1) dissolving, filtering: add water in the reactor, then drop into crude sodium p-aminobenzenesulfonate and industrial waste phenol respectively, the reactor is heated to 80-85 ℃, stirred for no less than 1 hour, cooled, filtered Remove the solid slag particles and keep the filtrate for later use;

[0030] (2) addition: slowly add a pH regulator to the filtrate obtained in step (1), and adjust the pH of the solution to 8-9;

[0031] (3) polycondensation: the solution is warmed up to 90-95° C., slowly add formaldehyde solution dropwise to it, so that formaldehyde is dripped in 1.5-2 hours, and the temperature is kept for not less than 2 hours;

[0032] (4) Copolymerization: adding 2-aminophenol-4-sulfonic acid...

Embodiment 2

[0035] A 2-aminophenol-4-sulfonic acid production waste liquid modified aminosulfonic acid-based superplasticizer, comprising the following raw materials in parts by weight:

[0036]

[0037] The preparation method is the same as that in Example 1.

[0038] When in use, the water reducing agent can be mixed into the cement at 1.1 wt % of the weight of the cement.

Embodiment 3

[0040] A 2-aminophenol-4-sulfonic acid production waste liquid modified aminosulfonic acid-based superplasticizer, comprising the following raw materials in parts by weight:

[0041]

[0042] The preparation method is the same as that in Example 1.

[0043] When in use, the water reducing agent can be mixed into the cement at 1.2 wt % of the weight of the cement.

[0044] The performance data of the water reducing agent prepared by using embodiment 1-3 are shown in the following table:

[0045]

[0046] As can be seen from the above table, compared with the test standard of the national standard "concrete admixture", the water-reducing agent prepared by Example 1-3 has higher water-reducing rate, lower air content, and lower 28d shrinkage ratio. Concrete has high compressive strength.

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Abstract

The invention relates to the technical field of cement additive production, particularly a modified sulfamic acid high efficiency water reducing agent prepared from 2-aminophenol-4-sulfonic acid production wastewater. The water reducing agent is prepared from the following raw materials in parts by weight: 120-150 parts of coarse sodium sulfanilate, 70-90 parts of formaldehyde, 250-350 parts of industrial waste phenol, 40-70 parts of 2-aminophenol-4-sulfonic acid production wastewater, 10-30 parts of pH regulator and 100-180 parts of water. The 2-aminophenol-4-sulfonic acid production wastewater is utilized to prepare the high-added-value water reducing agent, thereby implementing waste utilization and obtaining the convenient economical modified sulfamic acid high efficiency water reducing agent prepared from 2-aminophenol-4-sulfonic acid production wastewater. The water reducing agent has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of production of cement admixtures, in particular to a modified aminosulfonic acid-based high-efficiency water-reducing agent for 2-aminophenol-4-sulfonic acid production waste liquid. Background technique [0002] 2-Aminophenol-4-sulfonic acid is an important intermediate for preparing acid medium violet, active violet K-3R, and direct lightfast brown BRL. The production wastewater contains rich organic matter, high COD content, and difficult wastewater treatment. [0003] Water reducing agent is an admixture that can reduce the amount of mixing water under the condition that the fluidity of concrete is basically the same. It is the most widely studied and applied concrete admixture. Incorporating water reducer in the process of use can improve the workability and fluidity of fresh concrete, and can improve the strength of concrete and prolong the service life of concrete components. Therefore, water reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G14/12C08G14/073C04B24/22C04B103/30
CPCC04B24/22C04B24/226C04B2103/302C08G14/06C08G14/12
Inventor 刘景相马丽涛
Owner ANHUI XIN SOLID ENVIRONMENTAL CO LTD
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