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Method for synthesizing modified sulfamate water reducer by utilizing wastewater generated in tobias acid production process

A sulfamate, production process technology, applied in the field of synthetic modified sulfamate water reducer, can solve problems such as difficult to reuse, complex components, etc., to achieve improved service life, low dosage, strong dispersion ability Effect

Inactive Publication Date: 2016-07-13
浙江五龙新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual recovered organic matter is very complex and contains a certain amount of inorganic salt components, so it is difficult to reuse it in genuine dye intermediates. Take the organic matter recovered from H acid wastewater as an example, which contains H acid, T-acid, W-acid, chromotropic acid and other organic substances, it is almost impossible to use such complex molecular structure for the synthesis of dyes

Method used

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  • Method for synthesizing modified sulfamate water reducer by utilizing wastewater generated in tobias acid production process
  • Method for synthesizing modified sulfamate water reducer by utilizing wastewater generated in tobias acid production process
  • Method for synthesizing modified sulfamate water reducer by utilizing wastewater generated in tobias acid production process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The organic matter 30g (wherein sodium sulfate content: 13.2%) that extracts in the tunic acid waste water, 18g of sodium sulfanilate and 32g of phenol are dropped in the four-necked reaction flask, add water 185g, heat up while stirring, when temperature rises to At 45°C, use 32% ionic membrane NaOH solution to adjust the pH of the solution to 8.8, continue to heat up to 70°C, and start to drop 26.5g of 37% formaldehyde at this temperature. After the dropwise addition of formaldehyde is completed, the temperature is raised to 98°C, and the reaction is maintained for 8 hours. After the end of the heat preservation reaction, the pH value of the material is adjusted to 11.2 with 32% ionic membrane NaOH solution, and the reaction is carried out at 98°C for 4 hours, and the reaction ends. Cool down to room temperature and unload to obtain the modified sulfamate superplasticizer, numbered ANS-01.

Embodiment 2

[0030] Put 22g of organic matter extracted from tunic acid wastewater (including sodium sulfate content: 9.6%), 15g of sodium sulfanilate and 40g of cresol into a four-necked reaction flask, add 175g of water, and heat up while stirring. When the temperature rises When the temperature reaches 45°C, use 32% ionic membrane NaOH solution to adjust the pH of the solution to 8.3, continue to heat up to 70°C, and start to drop 30.5g of 37% formaldehyde at this temperature. After the dropwise addition of formaldehyde is completed, the temperature is raised to 98°C, and the reaction is maintained for 10 hours. After the end of the heat preservation reaction, the pH value of the material is adjusted to 11.5 with 32% ionic membrane NaOH solution, and the reaction is carried out at 98°C for 3 hours, and the reaction is completed. Cool down to room temperature and unload to obtain the modified sulfamate superplasticizer, numbered ANS-02.

Embodiment 3

[0032] 13g of organic matter extracted from tunic acid wastewater (in which sodium sulfate content: 5.8%), 16g of organic matter extracted in G salt wastewater (in which potassium sulfate content: 8.6%), 17g of sodium p-aminobenzenesulfonate, 40g of bisphenol A and Put 5g of high-activity lignin into a four-necked reaction flask, add 210g of water, and heat up while stirring. When the temperature rises to 45°C, use 32% ionic membrane NaOH solution to adjust the pH value of the solution to 7.7, and continue to heat up to 70°C. And start dropwise addition of 37% formaldehyde 34.6g at this temperature. After the dropwise addition of formaldehyde is completed, the temperature is raised to 100°C, and the reaction is maintained for 9 hours. After the end of the heat preservation reaction, the pH value of the material is adjusted to 11.5 with 32% ionic membrane NaOH solution, and the reaction is carried out at 100°C for 5 hours, and the reaction ends. Cool down to room temperature an...

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Abstract

The invention relates to a method for synthesizing a modified sulfamate water reducer by utilizing wastewater generated in the tobias acid production process. In the method, the modified sulfamate water reducer is prepared by adopting the wastewater generated in the tobias acid production process, sodium sulfanilate and a compound of phenolic hydroxy. The synthesized modified sulfamic acid has higher water-reducing rate of concrete and excellent slump retaining property and more importantly opens up a new path of comprehensive utilization of dye intermediate wastewater. The method has the beneficial effects that the environmental pressure in the dye intermediate production process is reduced while the raw material cost of the water reducer is reduced; and the method has good economic and environmental protection benefits.

Description

technical field [0001] The invention relates to a method for synthesizing a modified sulfamate water-reducer by using waste water produced in the production process of tunic acid. Background technique [0002] In the synthesis process of dyes, more naphthalene-based dye intermediates are often used, such as H acid, K acid, J acid, γ acid, Tween acid and G salt. In the process of preparing naphthalene-based dye intermediates, it is often necessary to undergo unit reactions in multiple steps such as sulfonic acid-nitration-reduction-alkali fusion-acid precipitation. Acidic wastewater. The generated wastewater is often high in acidity, high in color, high in salt, and contains a large amount of organic matter, which is highly toxic to organisms. It is difficult to degrade and treat by traditional biochemical processes, which brings great pressure to the environment. The production and usage of dyestuffs in our country rank first in the world, so we must find a way to rational...

Claims

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Application Information

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IPC IPC(8): C04B24/22C08G14/073C04B103/30
CPCC04B24/226C04B2103/302C08G14/06
Inventor 丁继英韩红良
Owner 浙江五龙新材股份有限公司
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