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Method for preparing cement water-reducing agent by using byproduct of organic pigment intermediate CLT acid

A technology of organic pigments and intermediates, which is applied in the field of organic chemical synthesis, can solve the problems of high cost, and achieve the effects of high fluidity, simple synthesis process, and simple synthesis method

Inactive Publication Date: 2013-06-12
ZHEJIANG QINYAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of ketone compounds and aldehyde compounds as raw materials for the production of current aliphatic superplasticizers is relatively high

Method used

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  • Method for preparing cement water-reducing agent by using byproduct of organic pigment intermediate CLT acid
  • Method for preparing cement water-reducing agent by using byproduct of organic pigment intermediate CLT acid
  • Method for preparing cement water-reducing agent by using byproduct of organic pigment intermediate CLT acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In a jacketed reactor with a reflux condenser, add 2 mol of CLT acid isomer mixture, 5 mol of anhydrous sodium sulfite, 10 mol of acetone, 40 mol of deionized water, raise the temperature to 40°C, and reflux for 2 hours; use 30% Caustic soda solution to adjust the pH value of the system to 10; add 20mol formaldehyde dropwise, and control the temperature to 50°C; after the dropwise addition, raise the temperature to 80°C, and reflux for 3 hours; cool down to room temperature, and obtain a new type of aliphatic high-efficiency cement superplasticizer crude liquid . Filter to obtain a novel aliphatic superplasticizer liquid product with a solid content of 30%. A new type of high-efficiency cement water-reducer is obtained by compounding the aliphatic high-efficiency water-reducer liquid product with the commonly used sulfamic acid high-efficiency cement water-reducer with a solid content of 30% in the market at a weight ratio of 7:1.

Embodiment 2

[0044] In a jacketed reactor with a reflux condenser, add 3 mol of CLT acid isomer mixture, 3.5 mol of anhydrous sodium sulfite, 10 mol of acetone, 50 mol of deionized water, heat up to 50°C, and reflux for 1 hour; % caustic soda solution to adjust the pH value of the system to 11; add 20mol formaldehyde dropwise, and control the temperature to 60°C; after the dropwise addition, raise the temperature to 82°C, and reflux for 5 hours; cool down to room temperature; obtain a new type of aliphatic high-efficiency cement superplasticizer crude liquid. Filter to obtain a novel aliphatic superplasticizer liquid product with a solid content of 35%. A new type of high-efficiency cement water-reducer is obtained by compounding the aliphatic high-efficiency water-reducer liquid product with the commonly used sulfamic acid high-efficiency cement water-reducer with a solid content of 35% in the market at a weight ratio of 4:1.

Embodiment 3

[0046]In a jacketed reactor with a reflux condenser, add 2 mol of CLT acid isomer mixture, 10 mol of anhydrous sodium sulfite, 15 mol of acetone, 40 mol of deionized water, raise the temperature to 55°C, and reflux for 3 hours; use 30% Adjust the pH value of the system to 13 with caustic soda solution; add 20mol formaldehyde dropwise, and control the temperature to 70°C; after the dropwise addition, raise the temperature to 90°C, and reflux for 6 hours; cool down to room temperature; obtain a new type of aliphatic high-efficiency cement superplasticizer crude liquid . Filter to obtain a novel aliphatic high-efficiency water reducer liquid product with a solid content of 40%. A new type of high-efficiency cement water-reducer is obtained by compounding the aliphatic high-efficiency water-reducer liquid product with the commonly used sulfamic acid high-efficiency cement water-reducer with a solid content of 40% in the market at a weight ratio of 2:1.

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Abstract

The invention relates to a method for preparing a cement water-reducing agent by using a byproduct of an organic pigment midbody CLT acid. The method comprises the following steps of: adding raw materials into a reaction kettle according to a molar ratio of a mixture of various isomers of the CLT acid to sulfite to a ketone compound to water being 1: (1-8): (2-10): (10-20), raising the temperature to 40-60 DEG C, and refluxing for 0.5-3 hours; adding a caustic soda solution for adjusting pH to 10-14; adding an aldehyde compound, controlling the temperature to 50-75 DEG C, after dropwise addition is ended, raising temperature to 80-100 DEG C, reacting for 3-6 hours, and reducing to room temperature to obtain an aliphatic series high-effect water-reducing agent crude liquid; filtering to obtain an aliphatic series high-effect water-reducing agent liquid product with 30-40% of solid content; and compounding the water-reducing agent and a sulfamic acid high-effect cement water-reducing agent commonly used in market according to a weight ratio of (2-7):1 to obtain the novel high-effect cement water-reducing agent. According to the method, the pollution of an aminotoluene sulfonic acid isomer mixture on environment is avoided, and the production cost is effectively reduced; and the synthetic method is simple and can be implemented in the common reaction kettle.

Description

technical field [0001] The invention relates to the field of organic chemical synthesis, in particular to a method for preparing a cement water reducer by using a by-product of an organic pigment intermediate CLT acid. Background technique [0002] In the production process of organic pigment intermediate CLT acid, after the hydrogenation reduction reaction stage is completed, nearly 40% of by-products will be produced-various mixtures of isomers containing aminotoluenesulfonic acid (CLT acid). The separation is more complicated, if it is not separated in time, it will affect the product purity of genuine 6-chloro-3-aminotoluene-4-sulfonic acid and the shade of the organic pigment synthesized later. However, how to utilize nearly 40% of the various aminotoluenesulfonic acid isomer mixtures that are produced after separation to make it a raw material in industrial production is a difficult problem. [0003] The high-efficiency water-reducing agents currently being researched...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/22C08G6/02C04B103/30
Inventor 仇文仲程建中王晓辉陈昭文徐蔚杨军浩
Owner ZHEJIANG QINYAN TECH CO LTD
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