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Production technology of dispersing agent MF (melamine-formaldehyde resin)

A production process and dispersant technology, applied in the field of dispersant MF production process, can solve the problems of complicated process and high cost of raw materials, and achieve the effect of simplified process, simple process and convenient operation

Inactive Publication Date: 2013-10-23
安阳市双环助剂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent number is: CN102746196A discloses a process of using sulfur trioxide as a sulfonating agent to produce dispersant MF. Sulfur trioxide gas is sulfonated, but this technical solution needs to add concentrated sulfuric acid, the process is more complicated, and the cost of raw materials is higher

Method used

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  • Production technology of dispersing agent MF (melamine-formaldehyde resin)
  • Production technology of dispersing agent MF (melamine-formaldehyde resin)
  • Production technology of dispersing agent MF (melamine-formaldehyde resin)

Examples

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Effect test

Embodiment 1

[0032] 1) Sulfonation: Put 70g of industrial washing oil into the sulfonation reactor, then slowly pass in 35g of sulfur trioxide gas with a volume concentration of 4%, control the reaction temperature at 110-115°C through the above-mentioned sulfonation reactor, and pass The injection time is about 2 hours. After the ventilation is over, keep warm for 1 hour and then raise the temperature to 130°C. Continue to react at this temperature for 3-4 hours, and then take a sample to test the acidity of the solution. After the acidity is qualified, cool down to 110°C. Can;

[0033] 2) Condensation: After the temperature drops to 75°C, add 35g of formaldehyde aqueous solution, raise the temperature to 115°C, react for 5-6 hours, dilute with water and pass into the neutralization reaction tank;

[0034] 3) Neutralization: pass in liquid caustic soda (32% sodium hydroxide solution) to adjust the pH to neutral, and pass through the filter;

[0035] 4) Filtration and drying: After filter...

Embodiment 2

[0037] 1) Sulfonation: put 70g of industrial washing oil into the sulfonation reactor, then slowly pass in 35g of sulfur trioxide gas with a volume concentration of 7%, control the reaction temperature at 110-115°C through the above-mentioned sulfonation reactor, and pass The injection time is about 2 hours. After the ventilation is over, keep warm for 1 hour and then raise the temperature to 130°C. Continue to react at this temperature for 3-4 hours, and then take a sample to test the acidity of the solution. After the acidity is qualified, cool down to 110°C. tank, the material entrained in the tail gas of the sulfonation reactor is condensed into a liquid through the graphite cooler and returned to the sulfonator;

[0038] 2) Condensation: After the temperature drops to 75°C, add 35g of formaldehyde aqueous solution, raise the temperature to 115°C, react for 5-6 hours, dilute with water and pass into the neutralization reaction tank;

[0039] 3) Neutralization: pass in liqu...

Embodiment 3

[0043] 1) Sulfonation: Put 70g of methylnaphthalene into the sulfonation reactor, and then slowly feed 35g of sulfur trioxide gas with a volume concentration of 9%, and control the reaction temperature to 110-115°C through the above-mentioned sulfonation reactor, and pass The injection time is about 2 hours. After the ventilation is over, keep warm for 1 hour and then raise the temperature to 130°C. Continue to react at this temperature for 3-4 hours, and then take a sample to test the acidity of the solution. After the acidity is qualified, cool down to 110°C. tank, the material entrained in the tail gas of the sulfonation reactor is condensed into a liquid through the graphite cooler and returned to the sulfonator;

[0044] 2) Condensation: After the temperature drops to 75°C, add 35g of formaldehyde aqueous solution, raise the temperature to 115°C, react for 5-6 hours, dilute with water and pass into the neutralization reaction tank;

[0045] 3) Neutralization: pass in liquid...

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Abstract

The invention discloses a production technology of dispersing agent MF (melamine-formaldehyde resin). The production technology is carried out by the following steps: leading sulfur trioxide to naphthalene materials to carry out sulfonation reaction; adding formaldehyde water solution to carry out condensation reaction; adding liquid caustic soda to adjust pH to a neutral state; filtering to obtain dispersing agent MF water solution; drying to obtain solid powder dispersing agent MF. The production technology is simple in procedure, and convenient to operate; compared with the traditional technology, sulfuric acid does not need to be added to a naphthalene compound while sulfur trioxide is directly led to carry out sulfonation. Thus, the material cost is saved; meanwhile, the process is simplified; environmental pollution and a potential safety hazard caused by treatment of concentrated sulfuric acid are avoided; no solid waste residue is generated.

Description

technical field [0001] The invention relates to a production process of dye dispersant MF (methylnaphthalenesulfonic acid formaldehyde condensate or naphthalenesulfonic acid formaldehyde condensate). Background technique [0002] Dispersant MF is mainly used as a dispersant and filler for vat dyes and disperse dyes. It is mainly used as a processing agent and dispersant for disperse dyes and vat dyes. Its performance is better than that of dispersant N. It has good grinding effect, dispersibility, It has the advantages of good heat resistance and high temperature dispersion stability, and is more stable than dispersant N in high temperature resistance. Dispersant MF can make dyes bright in color, increase in color strength, and even in coloring. It can also be compounded with various dispersants to meet the commercial requirements of various disperse dyes and vat dyes. It can also be used for early strength and water reduction of concrete. It can be used as a dispersant for...

Claims

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Application Information

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IPC IPC(8): C07C309/36C07C303/32C07C303/06
Inventor 郭彦召李燕平李幼民连保香
Owner 安阳市双环助剂有限责任公司
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