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A kind of preparation method of polyhydroxy modified soybean lecithin fatliquoring agent

A soybean lecithin and polyhydroxyl technology is applied in the field of preparation of polyhydroxyl modified soybean lecithin leather fatliquor, which can solve the problems of poor water solubility, low HLB value of soybean lecithin, poor filling property, etc. Hydrophilic, softness-enhancing effect

Active Publication Date: 2017-09-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the HLB value of soybean lecithin is low, and the emulsification is mainly reflected in the lipophilicity. The oil solubility of soybean lecithin is very good, but the water solubility is very poor, and it is almost insoluble in water.
However, the traditional fatliquor prepared from soybean lecithin has poor water solubility and poor filling ability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step 1: Put 100 parts by mass of soybean lecithin into a three-necked flask, then add 2 parts by mass of allyl glycidyl ether, raise the temperature to 40° C., and react at constant temperature for 2 hours.

[0017] Step 2: Add 5.8 parts by mass of formic acid to the system, use 0.6 parts by mass of concentrated sulfuric acid as a catalyst, add 30 parts by mass of hydrogen peroxide dropwise within 1 hour, and react for 8 hours. The temperature of the system was raised to 75° C., 55 parts by mass of sodium bisulfite was added, and the polyhydroxy modified soybean lecithin fatliquor was obtained after reacting for 3 hours.

[0018] Step 3: Adjust the pH of the system to 7.5-8 with 40% NaOH, add 60°C hot water to adjust the solid content of the system to 60%, and stir for 30 minutes to obtain a polyhydroxy soybean lecithin fatliquoring agent.

Embodiment 2

[0020] Step 1: Put 100 parts by mass of soybean lecithin into a three-necked flask, then add 2.3 parts by mass of allyl glycidyl ether, raise the temperature to 40° C., and react at constant temperature for 2 hours.

[0021] Step 2: Add 6 parts by mass of formic acid into the system, use 0.7 parts by mass of concentrated sulfuric acid as a catalyst, add 28 parts by mass of hydrogen peroxide dropwise within 1 hour, and react for 8 hours. Raise the temperature of the system to 75°C, add 45 parts by mass of sodium bisulfite, and react for 3 hours to obtain a polyhydroxy modified soybean lecithin fatliquoring agent.

[0022] Step 3: Adjust the pH of the system to 7.5-8 with 40% NaOH, add 60°C hot water to adjust the solid content of the system to 60%, and stir for 30 minutes to obtain a polyhydroxy soybean lecithin fatliquoring agent.

Embodiment 3

[0024] Step 1: Put 100 parts by mass of soybean lecithin into a three-necked flask, then add 2.4 parts by mass of allyl glycidyl ether, raise the temperature to 40° C., and react at constant temperature for 2 hours.

[0025] Step 2: Add 7.2 parts by mass of formic acid into the system, use 0.5 parts by mass of concentrated sulfuric acid as a catalyst, add 36 parts by mass of hydrogen peroxide dropwise within 1 hour, and react for 9 hours. The temperature of the system was raised to 75°C, 58 parts by mass of sodium bisulfite was added, and the polyhydroxy modified soybean lecithin fatliquor was obtained after reacting for 3 hours.

[0026] Step 3: Adjust the pH of the system to 7.5-8 with 40% NaOH, add 60°C hot water to adjust the solid content of the system to 60%, and stir for 30 minutes to obtain a polyhydroxy soybean lecithin fatliquoring agent.

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PUM

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Abstract

The invention relates to a preparation method of a polyhydroxyl-modified soybean phosphatide fatliquoring agent. The soybean phosphatide fatliquoring agent is widely used for fatliquoring at present, while the traditional fatliquoring agent is relatively poor in water solubility and is also not good in filling property. The preparation method comprises the steps of placing 100 parts by mass of soybean phosphatide into a three-neck flask, then, adding 2-2.5 parts by mass of allyl glycidyl ether, heating to 40 DEG C, and reacting at the constant temperature for 2h; adding 5.4-7.7 parts by mass of formic acid into the system, dropwise adding 25-40 parts by mass of hydrogen peroxide within 1h by taking 0.5-1 part by mass of concentrated sulfuric acid as a catalyst, and reacting for 8-10h; heating the system to 75 DEG C, adding 40-65 parts by mass of sodium hydrogen sulfite, and reacting for 3h; and regulating the pH value of the system to 7.5-8 by using 40% NaOH, adding 60-DEG C hot water to regulate the solid content of the system to 60%, and stirring for 30min to obtain the improved fatliquoring agent. The soybean phosphatide fatliquoring agent prepared by using the method disclosed by the invention has better hydrophilicity.

Description

technical field [0001] The invention relates to a preparation method of a leather fatliquor, in particular to a preparation method of a polyhydroxy modified soybean lecithin leather fatliquor. [0002] technical background [0003] Fatliquor is one of the most used leather chemical materials in leather production, and it is also one of the important chemical materials in leather processing. It can not only lubricate the leather fibers, prevent the leather from being stiff and cracking, but also make the leather have corresponding toughness and softness, and maintain its strength. It is an important factor affecting the quality and performance of leather. [0004] Soybean phospholipid fatliquor fatliquors the crust leather, the finished leather is soft and oily, and has unique filling, thickening and plumping functions, especially beneficial to solve the loose surface of leather. However, the HLB value of soybean lecithin is low, and the emulsification is mainly reflected in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C9/02
CPCC14C9/02
Inventor 马建中高建静吕斌
Owner SHAANXI UNIV OF SCI & TECH
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