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Preparation and Application of Protein Tanning Agent

Honglei Yin

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Abstract

The utilization of chrome sludge is discussed in this paper.Collagen hydrolysates are extracted by treating chrome sludge with sodium hydroxide and enzyme.And the obtained collagen hydrolysates are modified by formaldehyde to get protein tanning agent.The result of experiments has shown that when collagen hydrolysates are modified by 12% formaldehyde(based on collagen),the Ts of wet white,which is tanned with this tanning agent,can reach 85℃.Fullness and softness of resultant leather are good.

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What this paper is about

The utilization of chrome sludge is discussed in this paper.Collagen hydrolysates are extracted by treating chrome sludge with sodium hydroxide and enzyme.And the obtained collagen hydrolysates are modified by formaldehyde to get protein tanning agent.The result of experiments has shown that when collagen hydrolysates are modified by 12% formaldehyde(based on collagen),the Ts of wet white,which is tanned with this tanning agent,can reach 85℃.Fullness and softness of resultant leather are good.

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Available abstract

The utilization of chrome sludge is discussed in this paper.Collagen hydrolysates are extracted by treating chrome sludge with sodium hydroxide and enzyme.And the obtained collagen hydrolysates are modified by formaldehyde to get protein tanning agent.The result of experiments has shown that when collagen hydrolysates are modified by 12% formaldehyde(based on collagen),the Ts of wet white,which is tanned with this tanning agent,can reach 85℃.Fullness and softness of resultant leather are good.

Key concepts: Hydrolysate, Formaldehyde, Sodium hydroxide, Chemistry, Pulp and paper industry, Organic chemistry, Hydrolysis, Engineering

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