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Tanning method free of lime, sulfide, chloride ion and heavy metal chromium pollution

A sulfide, lime-free technology, applied in chemical treatment before tanning, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc., can solve the problem of increasing economic benefits and pollution. , reduce material costs and other issues, to achieve the effect of easy popularization and application, good compatibility, and reduced sewage treatment costs

Active Publication Date: 2014-11-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a tanning method without lime, sulfide, chloride ion and heavy metal chromium pollution in view of the deficiencies in the prior art. , chrome-free tanning process segment, under the optimized combination and synergistic effect of these three process segments, a new type of clean tanning method has been developed, which can not only ensure that the finished leather meets the national standard, but also fundamentally It solves the pollution problems of lime, sulfide, chloride ion and heavy metal chromium that have been plagued by the tanning industry, protects the environment, turns waste into treasure, and can also greatly reduce material costs and increase economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) The immersion pretreatment process plate includes the following steps,

[0035] In terms of parts by weight, put 100 parts of raw skins after batching into a drum, add 100 parts of water, 0.1 part of penetrant JFC, and 0.05 part of immersion aid SA-C at room temperature, rotate for 10 minutes, and then rotate for 10 minutes , stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, then turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, control the liquid; Then add 100 parts of water, at room temperature, add 0.1 part of penetrant JFC, 0.05 part of immersion aid SA-C, 0.1 part of compound enzyme Y, rotate for 30 minutes, stop for 20 minutes, adjust pH=9.5 with alkali, rotate for 20 minutes, stop for 20 minutes , rotate for 20min, stop for 20min, rotate for 20min, stop ...

Embodiment 2

[0041] (1) The immersion pretreatment process plate includes the following steps,

[0042] In terms of parts by weight, put 100 parts of raw skins after batching into a drum, add 150 parts of water, 0.3 parts of penetrant JFC, and 0.1 part of immersion aid SA-C at room temperature, rotate for 20 minutes, and then rotate for 10 minutes , stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, then turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, control the liquid; Then add 150 parts of water, at room temperature, add 0.3 part of penetrant JFC, 0.1 part of immersion aid SA-C, 0.3 part of compound enzyme Y, rotate for 60 minutes, stop for 20 minutes, adjust pH=10 with alkali, rotate for 20 minutes, stop for 20 minutes , rotate for 20min, stop for 20min, rotate for 20min, stop ...

Embodiment 3

[0048] (1) The immersion pretreatment process plate includes the following steps,

[0049] In terms of parts by weight, put 100 parts of raw skins after batching into a drum, add 250 parts of water, 0.5 parts of penetrant JFC, and 0.3 parts of immersion aid SA-C at room temperature, rotate for 40 minutes, and then rotate for 10 minutes , stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, turn for 10 minutes, stop for 20 minutes, then turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, turn for 5 minutes, stop for 55 minutes, control the liquid; Then add 250 parts of water, at room temperature, add 0.5 part of penetrant JFC, 0.3 part of immersion aid SA-C, 0.5 part of compound enzyme Y, rotate for 120 minutes, stop for 20 minutes, adjust pH=11.5 with alkali, rotate for 20 minutes, stop for 20 minutes , rotate for 20min, stop for 20min, rotate for 20min, s...

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PUM

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Abstract

The invention discloses a tanning method free of lime, sulfide, chloride ion and heavy metal chromium pollution. The tanning method is characterized in that the pollution of lime, sulfide, chloride ion and heavy metal chromium is not generated in the whole pre-tanning preparation and tanning process, so that main pollutants for tanning are completely eliminated. The processes include a soaking pre-treatment process, a composite enzyme depilation process and a chromium-free tanning process which are combined in an optimized manner and cooperated to develop a novel clean tanning method, so that the prepared finished leather satisfies the national standards, and a lime, sulfide, chloride ion and heavy metal chromium pollution problem which troubles the tanning industry all the time is radically solved, and therefore, the environment is protected and the waste is turned into things of value. Moreover, the tanning method further can be used for greatly lowering the material cost and increasing the economic benefits.

Description

technical field [0001] The invention relates to a tanning method without lime, sulfide, chloride ion and heavy metal chromium pollution, belonging to the field of tanning technology. Background technique [0002] The tanning industry has a long history and is also a characteristic traditional industry with comprehensive advantages in my country. It plays an important role in earning foreign exchange through export. However, while the tanning industry brings economic and social benefits, it also pollutes the environment to a certain extent. Therefore, it is imminent to reduce pollutants in the tanning process from the source, fully implement clean technology, and adopt new low-pollution and non-pollution technologies. [0003] It is well known that the pre-tanning section is the main source of pollutants in the tanning industry. According to data, the BOD produced in the preparation section before tanning is 88% of the BOD produced in the whole production process, the COD i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C1/02C14C1/04C14C3/02
Inventor 但卫华刘萌但年华郭松李峰
Owner SICHUAN UNIV