Production process of dispersing agent MF

A production process and dispersant technology, which is applied in the production process of dispersant MF, can solve the problems of affecting the quality index of dispersant MF, increasing production costs, and the large amount of concentrated sulfuric acid, so as to reduce costs, make the production process environmentally friendly, and reduce sulfuric acid. The effect of sodium content

Inactive Publication Date: 2017-12-29
ZHEJIANG JISHENG CHEM BUILDING MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing industrialized production of MF, the production is generally carried out according to the processes of sulfonation reaction, condensation reaction and neutralization reaction. Sulfuric acid needs to be neutralized with a large amount of lime, which produces a large amount of calcium sulfate and other waste residues. The processing of waste residues increases the production cost, and a certain amount of products are wrapped in the waste residues, which affects the output and causes waste.
[0004] At present, the Chinese patent application whose notification number is CN101386587A discloses a kind of production process of methylnaphthalenesulfonic acid formaldehyde condensate, and this production process neutralizes excessive concentrated sulfuric acid by adding liquid caustic soda, prevents the generation of calcium sulfate waste residue, but Due to the large amount of concentrated sulfuric acid in the reaction process of this production process, after the liquid caustic soda neutralizes the excess concentrated sulfuric acid, the sodium sulfate content in the product will exceed the standard, and the excessive sodium sulfate content in the product will easily affect the quality index of the dispersant MF. Quality of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: a kind of production technique of dispersant MF comprises the following steps:

[0031] (A) Sulfonation: Put the mixture of molten industrial methylnaphthalene and washing oil into the reaction device, adjust the temperature to 75-80°C, add concentrated sulfuric acid with a mass percentage concentration of 98%, methylnaphthalene raw materials, concentrated sulfuric acid The mass ratio is = 1:1, and the sulfonation reaction is carried out at 130-160 ° C. During the reaction, the vacuum pump is turned on to vacuum the reaction device to remove excess water. After the sulfonation process is completed, the reaction solution is injected Add production waste containing polysulfonated methylnaphthalene to obtain sulfonated material, and cool the sulfonated material to 83~85°C;

[0032] (B) Condensation: Add a metered amount of formaldehyde dropwise to the sulfonated material in step (A), heat up to 90-105°C after the dropwise addition, and carry out condensation ...

Embodiment 2

[0034] Embodiment 2: a kind of production technology of dispersant MF comprises the following steps:

[0035] (A) Sulfonation: Put the mixture of molten industrial methylnaphthalene and washing oil into the reaction device, adjust the temperature to 80-85°C, add concentrated sulfuric acid with a mass percentage concentration of 98%, methylnaphthalene raw materials, concentrated sulfuric acid The mass ratio is = 1:1, and the sulfonation reaction is carried out at 130-160 ° C. During the reaction, the vacuum pump is turned on to vacuum the reaction device to remove excess water. After the sulfonation process is completed, the reaction solution is injected Add production waste containing polysulfonated methylnaphthalene to obtain sulfonated material, and cool the sulfonated material to 81~84°C;

[0036] (B) Condensation: Add a metered amount of formaldehyde dropwise to the sulfonated material in step (A), heat up to 90-105°C after the dropwise addition, and carry out condensation...

Embodiment 3

[0038] Embodiment 3: a kind of production technique of dispersant MF comprises the following steps:

[0039] (A) Sulfonation: Put the mixture of molten industrial methylnaphthalene and washing oil into the reaction device, adjust the temperature to 78-82°C, add concentrated sulfuric acid with a concentration of 98% by mass, methylnaphthalene raw material, concentrated sulfuric acid The mass ratio is = 1:1, and the sulfonation reaction is carried out at 130-160 ° C. During the reaction, the vacuum pump is turned on to vacuum the reaction device to remove excess water. After the sulfonation process is completed, the reaction solution is injected Add production waste containing polysulfonated methylnaphthalene to obtain sulfonated material, and cool the sulfonated material to 82~84°C;

[0040] (B) Condensation: Add a metered amount of formaldehyde solution dropwise to the sulfonated material in step (A), heat up to 90-105°C after the dropwise addition, and carry out condensation ...

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Abstract

The invention discloses a production process of a dispersing agent MF and solves the problems that quality index and quality of the dispersing agent MF are affected easily by exceeding content of sodium sulfate in the product after excessive concentrated sulfuric acid is neutralized with liquid caustic soda due to larger dosage of concentrated sulfuric acid in a sulfonation reaction process. The production process mainly comprises steps of feeding of methylnaphthalene as a raw material, a sulfonation reaction, a condensation reaction and a neutralization reaction. Water in the reactions is removed and production waste containing polysulfonic acid methylnaphthalene is added in the sulfonation process, so that the content of sodium sulfate in the product is reduced by reducing dosage of sulfuric acid.

Description

technical field [0001] The present invention relates to a kind of production technology of dispersant, more specifically, it relates to a kind of production technology of dispersant MF. Background technique [0002] Dispersant MF is a formaldehyde condensate of sodium methylnaphthalenesulfonate, mainly used as a dispersant for vat dyes and disperse dyes. Dispersant MF has a good dispersing effect and is cheap. [0003] In the existing industrial production of MF, the production is generally carried out according to the processes of sulfonation reaction, condensation reaction and neutralization reaction. Sulfuric acid needs to be neutralized with a large amount of lime, which produces a large amount of calcium sulfate and other waste residues. The processing of waste residues increases the production cost, and a certain amount of products are wrapped in the waste residues, which affects the output and causes waste. [0004] At present, the Chinese patent application whose no...

Claims

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Application Information

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IPC IPC(8): C07C303/22C07C303/06C07C309/36C07C303/44
Inventor 金瑞浩徐伟耿标
Owner ZHEJIANG JISHENG CHEM BUILDING MATERIALS
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