Preparation method of dispersant with high efficiency and low formaldehyde

A dispersant and low-formaldehyde technology, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problems that affect the improvement of product quality and application effects, high free formaldehyde content, weak dispersing power, etc., to achieve Good market prospects, reduced free formaldehyde content, excellent performance effects

Inactive Publication Date: 2010-01-27
JIANGYIN CITY NINE CATTLES TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the defects in the traditional dispersant process, the color is darker, the dispersing power is not strong, and the content of free formaldehyde is high, which affects the improvement of product quality and application effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Add 600kg of naphthalene into a 2000L reactor, raise the temperature to 150°C, start adding 600kg of sulfuric acid dropwise, control the temperature not to exceed 165°C, and generate naphthalenesulfonic acid after 2 hours of heat preservation, take a sample for observation, and use it for later use after no oil is spent.

[0025] Add 60kg of phenol into the 200L reaction kettle, raise the temperature to 110°C, start adding 60kg of sulfuric acid dropwise, control the temperature not to exceed 130°C, and generate phenolsulfonic acid after 1.5 hours of heat preservation. Sampling and observation, it is qualified after no oil bloom.

[0026] Then press it into a 2000L reaction kettle, mix it with naphthalenesulfonic acid evenly, add appropriate amount of water to dilute, control the acidity to 27-28%, then add 252kg of formaldehyde at 97-100°C, control the temperature at 95-100°C, and keep it warm 8-9 hours, and then neutralized to pH7.5-8.5 with NaOH.

[0027] After the he...

Embodiment 2

[0029] Add 575kg of naphthalene into a 2000L reactor, raise the temperature to 150°C, start adding 575kg of sulfuric acid dropwise, control the temperature not to exceed 165°C, and generate naphthalenesulfonic acid after 2 hours of heat preservation, take samples for observation, and use it for later use after no oil is spent.

[0030] Add 60kg of phenol into the 200L reaction kettle, raise the temperature to 110°C, start adding 60kg of sulfuric acid dropwise, control the temperature not to exceed 130°C, and generate phenolsulfonic acid after 1.5 hours of heat preservation. Sampling and observation, it is qualified after no oil bloom.

[0031] Then press it into a 2000L reaction kettle, mix it with naphthalenesulfonic acid evenly, add appropriate amount of water to dilute, control the acidity to 27-28%, then add 260kg of formaldehyde at 97-100°C, control the temperature at 95-100°C, and keep it warm 8-9 hours, and then neutralized to pH7.5-8.5 with NaOH.

[0032] After the hea...

Embodiment 3

[0034] Add 600kg of naphthalene into a 2000L reactor, raise the temperature to 150°C, start adding 575kg of sulfuric acid dropwise, control the temperature not to exceed 165°C, and generate naphthalenesulfonic acid after 2.5 hours of heat preservation, take a sample for observation, and use it for later use after no oil is spent.

[0035] Add 60kg of phenol into the 200L reaction kettle, raise the temperature to 110°C, start adding 57kg of sulfuric acid dropwise, control the temperature not to exceed 130°C, and generate phenolsulfonic acid after 2 hours of heat preservation. Sampling and observation, it is qualified after oil-free flowering.

[0036] Then press it into a 2000L reaction kettle, mix it with naphthalenesulfonic acid evenly, add appropriate amount of water to dilute, control the acidity to 27-28%, then add 260kg of formaldehyde at 97-100°C, control the temperature at 95-100°C, and keep it warm 8-9 hours, and then neutralized to pH7.5-8.5 with NaOH.

[0037] After ...

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PUM

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Abstract

The invention relates to a preparation method of a dispersant with high efficiency and low formaldehyde, which is mainly used for assisting leather chemicals, i.e. a retanning agent and the like, to disperse in leathers when the leathers are processed and tanned. The method is characterized by comprising the following steps: (1) the synthetic reaction of a naphthalene sulfonic acid (A), i.e. firstly, adding naphthalene into a reaction kettle, and dripping a sulphuric acid into the reaction kettle to generate the naphthalene sulfonic acid (A); (2) the synthetic reaction of a phenolsulfonic acid (B), i.e. adding phenol into the reaction kettle, and dripping the sulphuric acid into the reaction kettle to generate the phenolsulfonic acid (B); (3) mixing the naphthalene sulfonic acid (A) and the phenolsulfonic acid (B), adding a right amount of water into the mixture for dilution, controlling the acidity of the mixed solution, then adding formaldehyde into the mixed solution, controlling the temperature of the mixed solution from 95 DEG C to 100 DEG C, preserving the temperature of the mixed solution for 8-9 hours, and then neutralizing the mixed solution to a pH value from 7.5 to 8.5 by NaOH; and (4) adding a formaldehyde trapping agent into the mixed solution so as to obtain an offwhite powdery dispersant finish product with high efficiency and low formaldehyde after drying processing, wherein the formaldehyde trapping agent is soyabean protein powder, isinglass, carbamide, melamine, quadrol, polyene and polyamine or diethylenetriamine. The dispersant with high efficiency and low formaldehyde has lighter colour and luster, strong dispersion force and little content of free formaldehyde.

Description

(1) Technical field [0001] The invention relates to a preparation method of a low-formaldehyde high-efficiency dispersant. The main purpose of this product is to help and improve the dispersibility and dye uptake rate of dyes in the commercial processing of dyes. During leather processing and tanning, it helps to disperse leather chemicals such as retanning agents in leather, and plays a better filling role. (2) Background technology [0002] A dispersant is a surfactant that has two opposite properties of lipophilicity and hydrophilicity in the molecule. It can uniformly disperse solid particles such as inorganic and organic pigments that are difficult to dissolve in liquids, and at the same time prevent the sedimentation and aggregation of solid particles to form a chemical required for a stable suspension. Its mechanism of action is mainly that the dispersant is adsorbed on the surface of solid particles, making the surface of condensed solid particles easy to wet. For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/12C09K23/12
Inventor 高金度马浩峰
Owner JIANGYIN CITY NINE CATTLES TECH
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