Recycling method of fur oxidation dyeing chrome mordant dye liquor

Abstract

The invention discloses a recycling method of fur oxidation dyeing chrome mordant dye liquor, which comprises the following steps: preparing new mordant dye liquor, adding fur and performing mordant dyeing; performing microfiltration treatment on fur chrome mordant dyeing waste liquid by use of filter cloth to remove impurities; and supplementing sodium bichromate or potassium bichromate, industrial salt and a penetrant, so that the chrome mordant dye liquor can be recycled repeatedly, and the pollution of bichromate is remarkably alleviated. According to statistics, by the method disclosed by the invention, the recycling frequency of the chrome mordant dye liquor can exceed 100 times, the bichromate is saved by 20%-40%, the industrial salt is saved by 50%-75%, the penetrant is saved by over 90%, and water is saved by over 70%, thereby greatly reducing the production cost and remarkably alleviating environmental pollution.

Description

Technical field [0001] The invention relates to a method for recycling fur oxidation dyeing chromium mordant liquor. Background technique [0002] Dyeing can increase the variety of fur products and increase the added value of products. Oxidation dyeing of fur refers to dyeing with oxidation dye, a special dye for fur. Oxidation dyes are special dyes for fur, so they are also called fur dyes, or Ursi and Ursul dyes. In fact, oxidation dyes are only intermediates of dyes. They cannot directly color the fur, and must undergo oxidation to develop color. Oxidation dyes have the advantages of small molecules, good permeability, low dyeing temperature (28℃-32℃), soft color, realistic imitation dyeing, and little adverse effect on the feel of fur skins. Therefore, oxidation dyeing is widely used in mink, Dyeing of high-end furs such as fox, yellow wolf, muskrat and imitation dyeing of high-end fur with low-end fur. However, the fastness of oxidation dyes is not high, so mordant dyei...

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Problems solved by technology

The industrial salt whose main component is sodium chloride is also very serious to the environment, so the discharge of mordant dyeing waste liquid will 1) waste precious chromium resources; 2) waste industrial salt and other chemical materials; 3) increase the difficulty of fur processing sewage treatment , dichromate, sodium chloride will cause serious pollution to the environment

In addition, during chrome retanning or chrome mordant dyeing of chrome tanned fur, there will be chrome tanning agent detanned into the mordant solution. The chrome mordant solution contains a large amount of dichromate, which allows enterprises to accurately and quantitatively detect the mordant and industrial The salt content brings certain difficulties, so the recycling of chrome mordant solution is more difficult to control

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