Method for synthesizing high-performance dispersing agent from 3-methyl-2-nitrobenzoic acid wastewater

A nitrobenzoic acid, high-performance technology, applied in fuel additives, liquid carbon-containing fuels, petroleum industry, etc., can solve problems such as fluidity, adaptability and stability, low gas content, and poor workability. Achieve the effects of eliminating efflorescence, improving safety performance, and extending the validity period

Inactive Publication Date: 2020-11-03
ANHUI XIN SOLID ENVIRONMENTAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the applicant found that when the product is applied to concrete water reducer, its gas content is still low and its workability is poor; when it is used in the field of coal water slurry, its fluidity, adaptability and stability to coal are still not ideal

Method used

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  • Method for synthesizing high-performance dispersing agent from 3-methyl-2-nitrobenzoic acid wastewater
  • Method for synthesizing high-performance dispersing agent from 3-methyl-2-nitrobenzoic acid wastewater
  • Method for synthesizing high-performance dispersing agent from 3-methyl-2-nitrobenzoic acid wastewater

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Experimental program
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Embodiment 1

[0031] A method for synthesizing a high-performance dispersant from 3-methyl-2-nitrobenzoic acid waste water, raw materials are calculated in parts by mass, comprising the steps:

[0032] Add 400 parts of 3-methyl-2-nitrobenzoic acid wastewater (solid content is 10wt%) in the reactor, add sulfonating agent, stir and mix evenly, add a certain amount of sodium hydroxide solution (32wt%) to adjust pH value to 8.5-9.5, add 10 parts of sodium lignosulfonate, stir and mix evenly, sulfonation and heat preservation for 30 minutes, sulfonation heat preservation temperature does not exceed 50 ° C; then add 100 parts of acetone dropwise, the temperature during the acetone addition process does not exceed 55 ° C , the dropping time is 30min; after the dropwise addition of acetone is completed, continue to drop 270 parts of formaldehyde (36wt%) slowly, and the dropwise adding time of formaldehyde is 3h, and the temperature during the dropping process does not exceed 95°C. ℃ condensation an...

Embodiment 2

[0035] A method for synthesizing a high-performance dispersant from 3-methyl-2-nitrobenzoic acid waste water, raw materials are calculated in parts by mass, comprising the steps of:

[0036] Add 400 parts of 3-methyl-2-nitrobenzoic acid waste water (solid content is 10wt%) in reactor, add sulfonating agent, stir and mix evenly, add a certain amount of sodium hydroxide solution (32wt%) to adjust pH value to 8.5-9.5, add 10 parts of sodium lignosulfonate, stir and mix evenly, sulfonation and heat preservation for 30 minutes, sulfonation heat preservation temperature does not exceed 50 °C; then add 100 parts of acetone dropwise, the temperature during the acetone addition process does not exceed 55 °C , it is 25 minutes long when dropping; after the dropwise addition of acetone is completed, continue to drop 260 parts of formaldehyde (36wt%) slowly, the formaldehyde is added dropwise for 5 hours, and the temperature during the dropwise addition does not exceed 95°C. After the drop...

Embodiment 3

[0039] A method for synthesizing a high-performance dispersant from 3-methyl-2-nitrobenzoic acid waste water, raw materials are calculated in parts by mass, comprising the steps of:

[0040] Add 400 parts of 3-methyl-2-nitrobenzoic acid waste water (solid content is 13wt%) in reactor, add sulfonating agent, stir and mix evenly, add a certain amount of sodium hydroxide solution (32wt%) to adjust pH value to 7-8, add 20 parts of sodium lignosulfonate, stir and mix evenly, sulfonation and heat preservation for 30 minutes, sulfonation heat preservation temperature does not exceed 50 ° C; then add 100 parts of acetone dropwise, the temperature during the acetone addition process does not exceed 55 ° C , the dropping time is 40min; after the dropwise addition of acetone is completed, continue to drop 270 parts of formaldehyde (36wt%) slowly, and the dropwise adding time of formaldehyde is 3h, and the temperature during the dropping process does not exceed 95°C. ℃ condensation and he...

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Abstract

The invention provides a method for synthesizing a high-performance dispersing agent from 3-methyl-2-nitrobenzoic acid wastewater, which comprises the following steps: adding wastewater into a reaction kettle, adding a sulfonating agent, uniformly stirring and mixing the components, adding a certain amount of sodium hydroxide water solution to regulate the pH value, adding a modifier, uniformly stirring and mixing the components, sulfonating the raw materials, keeping the temperature, and dropwisely adding acetone to obtain the high-performance dispersing agent. After acetone is dropwise added, continuously dropwise adding formaldehyde, carrying out condensation reaction and heat preservation, and cooling a reaction product after heat preservation is completed. The dispersing agent is modified by utilizing the 3-methyl-2-nitrobenzoic acid wastewater; meanwhile, modifiers such as sodium lignin sulfonate and sulfonated papermaking black liquor are introduced, and the modifiers are grafted into the molecular structure of the dispersing agent through sulfonation, condensation and block polymerization, so that the dispersity, the adaptability, the stability and the air entraining property of the dispersing agent are effectively improved; the dispsersing agent has an excellent dispersing effect in cement or coal water slurry, and has an obvious slump retaining effect in concrete.

Description

technical field [0001] The invention relates to the technical field of dispersants, in particular to a method for synthesizing high-performance dispersants from 3-methyl-2-nitrobenzoic acid wastewater. Background technique [0002] The world today is facing an oil crisis, and research on new energy alternatives has begun, and coal water slurry is one of its alternatives. Coal water slurry is used to replace coal combustion, which has the advantages of high combustion efficiency, reduced environmental pollution, convenient load adjustment, saving coal and improving working conditions. Coal water slurry technology is a clean coal technology that is efficient, safe, economical and clean, and easy to operate. As a new type of oil substitute fuel, coal water slurry has been highly valued by many countries. Coal water slurry is a solid and liquid two-phase coarse dispersion system. In order to make the coal water slurry have a lower viscosity and better fluidity in normal use, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/14C10L1/23C10L1/32C10L10/18C04B24/22C04B103/30C04B103/40
CPCC10L1/14C10L1/326C10L10/18C04B24/226C10L1/231C04B2103/302C04B2103/408C10L2300/30
Inventor 董翠平马丽涛乔琼琼尤健健徐培洋杨道顺朱海涛
Owner ANHUI XIN SOLID ENVIRONMENTAL CO LTD
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