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Method for preparing composite tan fatting agent from discarded phospholipid

A technology of retanning and fatliquoring and phospholipid, which is applied in the treatment of small raw hides/large raw hides/leather/fur, leather impregnation, chemical treatment of small raw hides/large hides/leather hides/furs, etc. problem, to achieve the effect of low cost, high added value and good fiber loosening

Inactive Publication Date: 2008-07-09
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for preparing retanning and fatliquor from waste phospholipids in view of the problems of high cost and single function of the existing middle and high-grade fatliquor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Add 280 parts by mass of waste phospholipids into a heat-resistant, pressure-resistant and corrosion-resistant reactor equipped with a stirrer and a thermometer, heat up to 40°C, add 20 parts by mass of sodium ethylate, then add 80 parts by mass of diethanolamine, heat up to 130°C, and react After 3 hours, amidated phospholipids were obtained. Cool to 100°C, add 120 parts by mass of maleic anhydride, add 1 part by mass of catalyst p-toluenesulfonic acid, raise the temperature to 110°C, and react for 2.5 hours to obtain an esterification product. Keeping the temperature of the reactor at 110° C., 10 parts by mass of tetrakishydroxymethylphosphonium chloride was slowly added dropwise, and reacted for 1 hour. Cool down to 50°C, add ammonia water to adjust the pH to 5.5, then add 100 parts by mass of sodium bisulfite, add 200 parts by mass of water, react for 1 hour, and adjust the pH to 6.5 with ammonia water to obtain a retanning and fatliquoring agent, which is suitable ...

example 2

[0026] Add 420 parts by mass of waste phospholipids into a heat-resistant, pressure-resistant and corrosion-resistant reaction kettle equipped with a stirrer and a thermometer, heat up to 50°C, add 30 parts by mass of sodium ethylate, then add 80 parts by mass of diethanolamine, heat up to 140°C, and react After 4 hours, amidated phospholipids were obtained. Cool to 100°C, add 160 parts by mass of maleic anhydride, add 5 parts by mass of p-toluenesulfonic acid as a catalyst, raise the temperature to 125°C, and react for 4 hours to obtain an esterification product. Keeping the temperature of the reactor at 125°C, 30 parts by mass of tetrakishydroxymethylphosphonium sulfate was slowly added dropwise, and reacted for 2 hours. Cool down to 70°C, add ammonia water to adjust the pH to 7.0, then add 150 parts by mass of sodium bisulfite, add 300 parts by mass of water, react for 3 hours, and adjust the pH to 7.0 with ammonia water to obtain a retanning and fatliquoring agent, which i...

example 3

[0028] Add 350 parts by mass of waste phospholipids into a heat-resistant, pressure-resistant and corrosion-resistant reaction kettle equipped with a stirrer and a thermometer, heat up to 45°C, add 25 parts by mass of sodium ethylate, then add 80 parts by mass of diethanolamine, heat up to 135°C, and react After 3.5 hours, amidated phospholipids were obtained. Cool to 100°C, add 140 parts by mass of maleic anhydride, add 3 parts by mass of catalyst p-toluenesulfonic acid, raise the temperature to 118°C, and react for 3.5 hours to obtain an esterification product. Keeping the temperature of the reactor at 118° C., 20 parts by mass of tetrakishydroxymethylphosphonium nitrate was slowly added dropwise, and reacted for 1.5 hours. Cool down to 60°C, add ammonia water to adjust the pH to 6.5, then add 125 parts by mass of sodium bisulfite, add 250 parts by mass of water, react for 2 hours, and adjust the pH to 7.0 with ammonia water to obtain a retanning and fatliquoring agent, whic...

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Abstract

The invention discloses a process for preparing retannage fatting agent by waste phosphatides, belonging to the leather chemical industry technology field. The process comprises firstly amidating waste phosphatides by utilizing diethanolamine, then esterifying through maleic acid, modifying esterification fat by using chloride salt, and finally sulfating fat by utilizing sodium acid sulfite, thereby preparing a novel fatting agent which has the functions of retannage and stuffing. The process can prepared leather fatting agent which is suitable to different models and requests and patterns through regulating proportions of each raw material component and has the characteristics of simple operation, simple device and low cost and the like. The retannage fatting agent of the invention has strong cohesion with leather fiber and excellent absorption property, which can make the leather which is filled fat much softer, compact, well developed, and the effect can be remained in long term.

Description

technical field [0001] The invention relates to a method for preparing a retanning and fatliquoring agent from waste phospholipids, which belongs to the technical field of leather chemical industry. Background technique [0002] In my country's tanning industry, fatliquor is one of the most used leather chemicals in the process of tanning. There are many types of fatliquoring agents produced in my country in recent years, but most of them are medium and low-grade products, which are difficult to meet the needs of making high-grade leather. Since the 1980s, my country's Leather Industry Research Institute has developed SCF-bonded fatliquor after tackling key problems. It has a strong combination with leather fibers and tanning agent molecules, and the resulting leather is plump and elastic after fatliquoring. Its appearance has changed the production status of my country's leather fatliquor, and it has gradually developed to high-grade fatliquor. But its higher price also r...

Claims

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Application Information

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IPC IPC(8): C14C9/00
Inventor 史楷岐叶巧云邵双喜李亚蒋岚
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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