Method for preparing leather fat liquor by treating electrostatic acids by spraying method

A technology of leather fatliquor and electrostatic acid, which is applied in the field of leather fatliquor preparation, to achieve full utilization of resources, good waxy feeling, and clean production

Inactive Publication Date: 2011-01-26
JIAXING ZANYU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a preparation method of leather fatliquoring agent, which should be able to solve the environmental

Method used

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  • Method for preparing leather fat liquor by treating electrostatic acids by spraying method
  • Method for preparing leather fat liquor by treating electrostatic acids by spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Spray vegetable oil into the tail gas pipeline, the flow rate per hour is 35kg, the flow rate of electrostatic acid is 7kg per hour, the pressure of the metering pump is 1.2MPa, after the reaction, the material enters the 1-ton reactor, and the material in the reactor is adjusted to reach about 1 ton. Stop Enter, switch to another stirring reactor, start stirring, slowly add ammonia water for neutralization, after neutralization, the pH is 6.0, add 60kg of hydrogen peroxide (27.5%), decolorize at 75°C for 10 hours, after the color meets the requirements, add preservatives Kayson 1kg, add water to adjust the solid content to 70.3%, to obtain a fatliquor product.

Embodiment 2

[0022] Spray fish oil into the tail gas pipeline, the flow rate per hour is 50kg, the flow rate of electrostatic acid is 7kg per hour, the pressure of the metering pump is 1.6MPa, after the reaction, the material enters the 1-ton reactor, and the material in the reactor is adjusted to reach about 1 ton. Stop Enter, switch to another stirring reactor, start stirring, slowly add sodium hydroxide to neutralize, the pH after neutralization is 6.5, add 40kg of hydrogen peroxide (27.5%), decolorize at 70°C for 6 hours, after the color meets the requirements, add Preservative sodium benzoate 1kg, add water to adjust the solid content to 71.5%, to obtain a fatliquor product.

Embodiment 3

[0024] Soybean oil is sprayed into the tail gas pipeline, the flow rate per hour is 60kg, the flow rate of electrostatic acid is 7kg per hour, the pressure of the metering pump is 2.0MPa, the material after the reaction enters the 1-ton reactor, and the material in the reactor is adjusted to reach about 1 ton. Stop Enter, switch to another stirred reactor, start stirring, slowly add diethanolamine to neutralize, the pH after neutralization is 7.1, add 50kg of hydrogen peroxide (27.5%), decolorize at 65°C for 5 hours, after the color meets the requirements, add anti-corrosion Potassium sorbate 1kg, add water to adjust to contain solid 69.8%, obtain fatliquor product.

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Abstract

The invention relates to a method for preparing leather fat liquor, which aims to solve the problem of environmental protection in sulfonation production and simultaneously improve the economic benefits with less process equipment investment. The technical scheme of the invention is that: the method for preparing the leather fat liquor by treating electrostatic acids by a spraying method comprises the following steps of: reserving a pressure nozzle in a vertical pipeline connected with a gas-liquid separator and an electrostatic precipitator, communicating the pressure nozzle with a spraying device outside the pipeline, and spraying organic materials for spraying in a storage groove from the pressure nozzle by a metering pump under pressure for contact reaction with tail gases; and causing the reacted materials to flow out of the bottom of the electrostatic precipitator to a stirred tank reactor, performing neutralization with alkali until the pH is 6.0 to 7.5, adding hydrogen peroxide to perform decoloring for 4 to 10 hours, and adding a preservative and water for conditioning to obtain the fat liquor product.

Description

technical field [0001] The invention relates to a method for preparing a leather fatliquoring agent, in particular to a method for preparing a leather fatliquoring agent by carrying out a contact reaction between an organic substance and sulfur trioxide sulfonated tail gas through high-pressure spraying. technical background [0002] Sulfur trioxide sulfonation is the main process for producing anionic surfactants. After the sulfonation reaction between organic materials and sulfur trioxide, the sulfonated tail gas separated from the gas-liquid separator and cyclone separator contains unconverted sulfur dioxide, unreacted sulfur trioxide, sulfuric acid mist and organic acid mist, directly Emissions can seriously pollute the environment. In order to meet environmental protection emission requirements, these components must be removed, usually by electrostatic precipitator (ESP) for capture, and then further treated by acid-base absorption and alkali washing, and then dischar...

Claims

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Application Information

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IPC IPC(8): C14C9/02
Inventor 杨春良王文德邹欢金华文高张义勇胡剑品
Owner JIAXING ZANYU TECH DEV CO LTD
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