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Sulfonated leather greasing agent containing fatty acid low-carbon ester and preparation method thereof

A technology of leather fatliquor and low-carbon ester, which is applied in leather impregnation, small raw hide/big raw hide/leather/fur treatment, small raw hide/large raw hide/leather skin/fur chemical treatment, etc., which can solve the low utilization rate of raw materials , Low product sulfonation rate, increased product failure rate, etc., to reduce side reactions of color deepening, improve flow state, and improve stability

Active Publication Date: 2015-04-29
广州浪奇日用品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the carbon-carbon double bond in the carbon chain, in the sulfonation reaction, mainly carbon-carbon double bond and SO 3 reaction, while the ester group reacts with SO 3 The combination rate is not high
Moreover, after sulfonation and aging, oils containing carbon-carbon double bonds have a deep color and are easy to coke and carbonize. Therefore, oils with double bonds generally do not undergo aging and are directly neutralized after sulfonation. The sulfonation rate of the obtained product is relatively low. poor product stability
In particular, the product quality is affected by the difference in raw material quality during the production process, resulting in unstable product quality, prone to delamination, and often oil slicks during use, resulting in an increase in product failure rate and increased production costs.
In addition, the appearance color of traditional sulfonated leather fatliquor is generally a reddish-brown liquid, barely meeting the color requirements of downstream applications
In addition, the fatliquoring agent is generally related to the iodine value of the raw material. Generally, the higher the iodine value of the raw material, the darker the color of the raw material will be at the same sulfonation rate. Therefore, in order to meet the color requirements, the sulfonation rate of the raw material should not be too high. High, low raw material utilization
[0003] In order to improve the ester group and SO of fatty acid ester 3 Some people have tried to use catalytically hydrogenated saturated fatty acid esters as raw materials to prepare fatliquor. However, due to the high freezing point of saturated fatty acid esters, the freezing point of the product after sulfonation also increases, and it is in a solidified state at room temperature. Paste or solid, or a lot of precipitation, its dissolution time is too long, it is very inconvenient to use, and it is not competitive in the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, a mixture of saturated fatty acid methyl esters whose R1 carbon chain is C12, saturated fatty acid methyl esters whose R1 carbon chain is C14, saturated fatty acid methyl esters whose R1 carbon chain is C16, and saturated fatty acid methyl esters whose R1 carbon chain is C18 is used as Raw materials, wherein, R1 carbon chain is C12 saturated fatty acid methyl ester accounts for 35%; R1 carbon chain is C14 saturated fatty acid methyl ester accounts for 15%; R1 carbon chain is C16 saturated fatty acid methyl ester accounts for 33%; R1 carbon chain is C18 saturated fatty acid methyl esters accounted for 17%.

[0039] (1) Sulfonation: Using gas-phase falling film sulfonation / sulfation laboratory equipment, saturated fatty acid methyl ester is transported from the raw material insulation cylinder with a set temperature of 55°C to the single pipe at a quantitative rate of 250 g / min through a delivery pump. The upper part of the reactor overflows to the inn...

Embodiment 2

[0044] The present embodiment adopts the mixture of saturated fatty acid butyl ester whose R1 carbon chain is C16 and saturated fatty acid methyl ester whose R1 carbon chain is C18 as raw material, wherein, R1 carbon chain is that the saturated fatty acid butyl ester of C16 accounts for 65%; R1 carbon chain is C18 saturated fatty acid butyl ester accounts for 35%.

[0045] (1) Sulfonation: Using gas-phase falling film sulfonation / sulfation laboratory equipment, saturated fatty acid butyl ester is transported from the raw material insulation cylinder with a set temperature of 55 °C to the single pipe at a quantitative rate of 324 g / min through a delivery pump. The upper part of the reactor overflows to the inner wall of the reactor after it is filled with the feed chamber. The feed pump uses a frequency converter to control the flow rate of saturated fatty acid butyl ester. The jacket water temperature outside the sulfonation reactor is 70°C. Liquid SO 2 After gasification, th...

Embodiment 3

[0050] This embodiment adopts the mixture of C16 saturated fatty acid isopropyl ester with R1 carbon chain and C18 saturated fatty acid isopropyl ester with R1 carbon chain as raw material, wherein, R1 carbon chain is C16 saturated fatty acid isopropyl ester accounts for 65%; R1 The isopropyl ester of saturated fatty acid with a carbon chain of C18 accounts for 35%.

[0051] (1) Sulfonation: Using gas-phase falling film type sulfonation / sulfation laboratory equipment, saturated fatty acid isopropyl ester is transported from the raw material insulation cylinder with a set temperature of 70°C to the single The upper part of the tube reactor is filled with the feed chamber and overflows to the inner wall of the reactor. The feed pump uses a frequency converter to control the flow rate of saturated fatty acid isopropyl ester. The jacket water temperature outside the sulfonation reactor is 80°C. Liquid SO 2 After gasification, the gas mass flow meter is controlled at 65 g / min, and...

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PUM

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Abstract

The invention discloses a sulfonated leather greasing agent containing fatty acid low-carbon ester. The sulfonated leather greasing agent containing fatty acid low-carbon ester disclosed by the invention is prepared by comprising the following steps: sulfonating by taking saturated fatty acid low-carbon ester as the raw material so as to obtain sulfonated fatty acid low-carbon ester, adding grease or modified grease, uniformly mixing, putting in an aging tank to age, decolourizing, and finally, adjusting pH of the decolourized sulfonated fatty acid low-carbon ester to be 4-8 so as to obtain the leather greasing agent. The invention further discloses a preparation method of the leather greasing agent. Because of being a liquid product, the leather greasing agent disclosed by the invention is convenient for down-stream customers to use; furthermore, the leather greasing agent is steady in property and has good fillibility; and thus, leather is plump and soft in hand feeling and smooth in surface.

Description

technical field [0001] The invention relates to a leather fatliquor and a preparation method thereof, in particular to a sulfonated leather fatliquor containing fatty acid low-carbon ester and a preparation method thereof. Background technique [0002] The fatliquoring process in leather production is the process of treating leather with oil or fatliquor under certain process conditions, so that the leather absorbs a certain amount of oil and endows the leather with certain physical, mechanical and usable properties. Fatliquoring can make the fibers inside the leather wrapped by lubricating oil or the surface of the fibers to a large number of "oily" molecules through chemical and physical actions, balance the surface energy of the leather fibers, and transform the original high-energy surface into a low-energy surface. Increase the mutual mobility between fibers, so as to prevent the leather from hardening and cracking, and make the leather have good physical and mechanical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C9/02
CPCC14C9/02
Inventor 潘鹤潮赵建红陈武渊罗丹丹钟金春卢志敏戴殷
Owner 广州浪奇日用品有限公司
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