Method for synthesizing modified sulfamate water reducer by utilizing wastewater generated in G salt production process

A sulfamate and production process technology, applied in the field of synthesizing modified sulfamate water-reducing agents, can solve the problems of complex components, difficult to reuse, etc., and achieve low dosage, improved service life, and water-reducing rate. high effect

Inactive Publication Date: 2016-07-27
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 G salt production process
  • Method for synthesizing modified sulfamate water reducer by utilizing wastewater generated in G salt production process
  • Method for synthesizing modified sulfamate water reducer by utilizing wastewater generated in G salt production process

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Experimental program
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Effect test

Embodiment 1

[0028] Put 30g of organic matter extracted from G salt wastewater (sodium sulfate content: 13.2%), 18g of sodium sulfanilate and 32g of phenol into a four-necked reaction flask, add 185g of water, and heat up while stirring. When the temperature rises to 45 At ℃, use 32% ionic membrane NaOH solution to adjust the pH value of the solution to 8.8, continue to heat up to 70℃, 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 the G salt wastewater (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 to At 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 adding 30.5g of 37% formaldehyde dropwise 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 G salt wastewater (including sodium sulfate content: 5.8%), 16g of organic matter extracted from G salt wastewater (including potassium sulfate content: 8.6%), 17g of sodium p-aminobenzenesulfonate, 40g of bisphenol A and high Active lignin 5g is put into the four-necked reaction flask, add water 210g, 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, continue to heat up to 70°C, and At this temperature, 34.6 g of 37% formaldehyde was added dropwise. 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 and unload to ob...

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Abstract

The invention relates to a method for synthesizing a modified sulfamate water reducer by utilizing wastewater generated in the G salt production process. In the method, the modified sulfamate water reducer is prepared by adopting the wastewater generated in the G salt production process, sodium sulfanilate and a compound of phenolic hydroxy. The synthesized modified sulfamic acid has a higher water-reducing rate of concrete and an 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 therefore, 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 G salt. 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 rationally u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B103/30
CPCC04B24/16C04B2103/302
Inventor 韩红良沈国兴蔡良
Owner 浙江五龙新材股份有限公司
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