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Zirconium complex tanning agent and preparation method thereof

A complex and tanning agent technology, which is applied in the field of non-chrome zirconium complex tanning agent and its preparation, can solve the problems of low alkali resistance, uneven penetration, strong water absorption, etc., and achieve good stability and reactivity, The production process is simple and the effect of little environmental pollution

Inactive Publication Date: 2016-08-17
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of zirconium tanned leather is that the body bone is harder and has strong water absorption; when zirconium salt is used alone, its alkali resistance is low, and it is very easy to hydrolyze and polymerize to form macromolecular polymers, which are easy to produce irreversible bonds on the surface of the leather. Grain shrinkage, surface overtanning, resulting in uneven penetration into the skin
Therefore, traditional zirconium salt (zirconium sulfate, zirconium oxychloride) tanned leather has been unable to replace chromium salt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1) Weigh 45 parts of zirconium sulfate, 7.8 parts of monoethanolamine and 55 parts of deionized water in parts by mass;

[0014] 2) Add zirconium sulfate and deionized water into the reaction vessel equipped with a stirrer, adjust the rotation speed to 200 rpm, and completely dissolve the zirconium sulfate at room temperature; then maintain the rotation speed and slowly add 7.8 parts of monoethanolamine to the In the reaction vessel, react until the system remains constant; then raise the temperature to 80°C, and react for 4 hours to keep the system transparent and stable; cool down to 45°C, discharge, and stand still to obtain the zirconium complex tanning agent; the appearance at room temperature It is a transparent liquid.

Embodiment 2

[0016] 1) Weigh 45 parts of zirconium sulfate, 15.6 parts of monoethanolamine and 55 parts of deionized water in parts by mass;

[0017] 2) Add the weighed zirconium sulfate and deionized water into the reaction vessel equipped with a stirrer, adjust the rotation speed to 250 rpm, and completely dissolve the zirconium sulfate at room temperature; then maintain the rotation speed and slowly add 15.6 parts of Put monoethanolamine into the reaction vessel, and react until the system remains constant; then raise the temperature to 80°C, and react for 4 hours to keep the system transparent and stable; cool down to 45°C, discharge, and stand still to obtain the zirconium complex tanning agent; Appearance is transparent liquid at room temperature.

Embodiment 3

[0019] 1) In parts by mass, weigh 45 parts of zirconium sulfate, 9.4 parts of monoethanolamine and 45 parts of deionized water;

[0020] 2) Add the weighed zirconium sulfate and deionized water into the reaction vessel equipped with a stirrer, adjust the rotation speed to 200 rpm, and completely dissolve the zirconium sulfate at room temperature; then maintain the rotation speed and slowly add 9.4 parts of Put monoethanolamine into the reaction vessel, and react until the system remains constant; then raise the temperature to 80°C, and react for 4 hours to keep the system transparent and stable; cool down to 45°C, discharge, and stand still to obtain the zirconium complex tanning agent; Appearance is transparent liquid at room temperature.

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PUM

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Abstract

The invention relates to a zirconium complex tanning agent and a preparation method thereof. The preparation method comprises the following steps: Step 1: adding 45 to 55 parts by mass of tetravalent zirconium salt and 41.8 to 55 parts of water In the reaction vessel equipped with a stirrer, stir at normal temperature to completely dissolve the tetravalent zirconium salt; step 2, slowly add 7.8 parts to 18.1 parts of monoethanolamine dropwise to the reaction vessel, and react until the system remains constant; then heat up The reaction is carried out at 60-85° C. for 3-6 hours until the system remains transparent and stable, then cooled and allowed to stand to obtain the zirconium complex tanning agent. The technical scheme of the invention has the technical effects of good comprehensive performance, simple production process and environmental friendliness, so as to solve the environmental pollution effect of the chrome-type tanning agent.

Description

technical field [0001] The invention belongs to the technical field of leather tanning, and relates to a leather tanning agent used in the leather tanning process and a preparation method thereof, in particular to a non-chromium zirconium complex tanning agent and a preparation method thereof. Background technique [0002] Tanning is the most important part of the leather and fur processing process, and it is also one of the main processes that cause pollution in the leather industry. Since the invention of chrome tanning agent, it has become the main tanning agent for leather tanning and is almost irreplaceable. However, there are irreconcilable contradictions between the good tanning performance of chrome tanning agents and the shortage of chrome resources, chrome pollution and the safety of consumer products for chrome tanned leather. According to statistics, the total chromium discharge of my country's leather industry ranks first among all industries; chromium discharg...

Claims

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Application Information

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IPC IPC(8): C14C3/02C14C3/08
CPCC14C3/02C14C3/08
Inventor 兰云军沈晓军罗卫平柴玉叶
Owner WENZHOU UNIVERSITY
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