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A kind of preparation method of leather fatliquor

A leather fatliquor, animal and vegetable oil technology, applied in leather impregnation, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. The problems of complex process, acid and salt-containing wastewater discharge, etc., to achieve the effect of low three waste discharge, simplified process, good quality stability and fatliquoring performance

Inactive Publication Date: 2018-04-17
ZANYU TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process requires salt washing to remove a large amount of unreacted sulfuric acid in the sulfation process, resulting in a large amount of acid-containing and saline-containing wastewater discharge, which has a large environmental pollution; and this process requires the use of some low-carbon alcohols for transesterification to improve the combination of sulfuric acid amount, the process is relatively complex

Method used

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  • A kind of preparation method of leather fatliquor
  • A kind of preparation method of leather fatliquor
  • A kind of preparation method of leather fatliquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The heated lard is pumped into the membrane sulfonator at a flow rate of 4kg / h with a metering pump, and sulfur trioxide gas with a concentration of 4% is introduced at the same time, and circulating water is connected to the jacket of the sulfonator. The fixed water temperature is 65°C. After the neutralization value is stable, a certain amount of sulfonic acid ester is received, the temperature is controlled at 60°C, chlorine gas is introduced, and the flow rate of chlorine gas is adjusted, and the density of the product after chlorination is controlled to be 1.1 times that before chlorination. After the chlorination reaction is completed, about 600 g of chlorinated lard sulfonate is neutralized with 32% liquid alkali to pH 9.3, hydrogen peroxide is added for decolorization, and water is added to adjust the solid content to obtain a leather fatliquor product.

[0022] This example product SO 3 The binding rate is 4.9%, the chlorine content is 13.5%, and it shows good...

Embodiment 2

[0027] The heated tallow was pumped into the membrane sulfonator at a flow rate of 5kg / h with a metering pump, and sulfur trioxide gas with a concentration of 6% was introduced at the same time, and circulating water was connected to the jacket of the sulfonator. The fixed water temperature is 70°C. After the neutralization value was stable, a certain amount of sulfonic acid ester was received, the temperature was controlled to 70°C, chlorine gas was introduced, and the flow rate of chlorine gas was adjusted, and the density of the product after chlorination was controlled to be 1.1 times that before chlorination. After the chlorination reaction is completed, about 800 g of chlorinated tallow sulfonate is neutralized to pH 8.7 with diethanolamine, hydrogen peroxide is added for decolorization, and water is added to adjust the solid content to obtain a leather fatliquor product.

[0028] This example product SO 3 The binding rate is 6.7%, the chlorine content is 15.4%, and it ...

Embodiment 3

[0032] Mix the heated lard and suet oil with a mass ratio of 1:1, and pump the mixed oil into the membrane sulfonator at a flow rate of 6.5kg / h with a metering pump, and at the same time, introduce sulfur trioxide gas with a concentration of 7%. , and connect the circulating water in the jacket of the sulfonator, and set the water temperature to 75 ℃. After the neutralization value is stable, a certain amount of sulfonic acid ester is received, the temperature is controlled at 65°C, chlorine gas is introduced, and the flow rate of chlorine gas is adjusted, and the density of the product after chlorination is controlled to be 1.2 times that before chlorination. After the chlorination reaction is completed, about 850 g of the chlorinated mixed oil sulfonate is neutralized with 32% liquid alkali to pH 8.9, hydrogen peroxide is added for decolorization, and water is added to adjust the solid content to obtain a leather fatliquor product.

[0033] This example product SO 3 The bin...

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Abstract

The invention relates to a preparation method of a novel leather fatliquor. The purpose is to provide a simple and feasible process, low emission of three wastes, green environmental protection, stable product quality, and excellent fatliquoring performance. The technical scheme is: a preparation method of a novel leather fatliquoring agent, which is carried out according to the following steps: heating the continuously input animal and vegetable oil to a certain temperature, then inputting gas-phase SO3 to carry out SO3 membrane sulfonation reaction, and controlling the SO3 binding amount; Chlorine gas is introduced into the sulfonated animal and vegetable oil, and the chlorinated animal and vegetable oil sulfonate is prepared by chlorination reaction, and the chlorine content is controlled; 3. The chlorinated animal and vegetable oil sulfonate is neutralized and decolorized with alkali to obtain the leather added. Fat products.

Description

technical field [0001] The invention relates to the technical field of leather chemical industry, in particular to a novel leather fatliquor and a preparation method thereof. Background technique [0002] The use of animal and vegetable oil modification to prepare leather fatliquor has a long history in my country. It is generally believed that animal and vegetable oil fatliquors can endow leather with good moisturizing, filling, plump, soft and storage-resistant properties, so its research and development has always been paid attention to. Especially after the 1980s, great progress has been made in the study of animal and vegetable oil modification methods, which has improved the grade and quality of animal and vegetable oil fatliquors and expanded its application in the field of leather chemical industry. [0003] So far, the commonly used modification methods for animal and vegetable oils mainly include sulfation (sulfonation) and chlorination. Among them, the animal an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C9/02
Inventor 钟鸣翔葛赞史立文杨春良代永昌
Owner ZANYU TECH GRP CO LTD
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