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Preparation method for preparing sulfitation fatliquor by use of waste oil

A technology of waste oil and sulfitation, applied in application, chemical treatment of small raw hide/big raw hide/leather skin/fur, small raw hide/big raw hide/leather/fur treatment, etc., can solve environmental pollution, resource waste, health Safety hazards and other issues, to achieve the effect of simple process, low quality and high price, and increase added value

Active Publication Date: 2014-01-29
ZHEJIANG SHENGHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to incomplete statistics, the catering industry in nearly 100 large and medium-sized cities in my country discharges nearly 2 million tons of waste oil every year, causing serious environmental pollution and waste of resources.
In particular, a large amount of waste oil from catering flows into the food market through various illegal channels, which poses a huge hazard to people's health and safety.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use a 200-mesh gauze filter cloth to repeatedly filter the waste oil 1 to 3 times to obtain a clean waste oil-water mixture without impurities. Put it into a reaction kettle, heat it to 90~95°C, evacuate it to 0.07MPa, and dehydrate it until the water content is less than 0.5%. Cool down to 75-90°C, then add activated clay with 5% waste oil mass, stir thoroughly for 30 minutes, and filter to obtain refined waste oil.

Embodiment 2

[0032] Use a 200-mesh gauze filter cloth to filter the waste oil repeatedly for 1 to 3 times to obtain a clean and impurity-free waste oil and water mixture. Put it into a reaction kettle, heat it to 90~95°C, evacuate it to 0.07MPa, and dehydrate it until the water content is less than 0.5%. Cool down to 75-90°C, then add carbon black with 5% waste oil mass, stir thoroughly for 30 minutes, and filter to obtain refined waste oil.

Embodiment 3

[0034] Use a 200-mesh gauze filter cloth to filter the waste oil repeatedly for 1 to 3 times to obtain a clean and impurity-free waste oil and water mixture. Put it into a reaction kettle, heat it to 90~95°C, evacuate it to 0.07MPa, and dehydrate it until the water content is less than 0.5%. Cool down to 75-90°C, then add hydrogen peroxide with 5% waste oil mass, stir thoroughly for 90 minutes, and filter to obtain refined waste oil.

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PUM

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Abstract

The invention belongs to the technical field of leather chemicals, and discloses a leather fatliquor containing sulfitation waste oil and a preparation method of the fatliquor. The method comprises the following steps: enabling the refined waste oil to react with monoethanolamine to obtain amidated waste oil; enabling the amidated waste oil to react with maleic anhydride to obtain succinate; and enabling the succinate to react with sodium hydrogen sulfite to obtain the sulfitation fatliquor. The method disclosed by the invention not only can meet the environmental need for treating gutter oil to increase the added value of the gutter oil, but also can provide the much-needed oil raw material for the leather industry; the raw materials are easily available, the cost is low, and the method is simple and convenient; moreover, the conditions in the preparation process are mild, the discharge of three wastes is avoided, and industrial production is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of leather chemical industry, in particular to preparing a leather fatliquoring agent containing sulfited waste oil and a preparation method thereof. Background technique [0002] Fatliquor is the most used leather chemical material in leather production, and it is also one of the important chemical materials in leather processing. It can not only lubricate the leather fibers, prevent the leather from being stiff and cracking, but also make the leather have corresponding softness and toughness, and maintain its strength. It is an important factor affecting the quality and performance of leather. Fatliquor can be divided into sulfonates (sulfites), sulfates, phosphates, sulfosuccinates and other leather fatliquors according to the different hydrophilic groups. Among them, sulfonate or sulfite leather fatliquor has good emulsification, permeability and acid and alkali resistance, and is a type of fatliquoring...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C9/02
Inventor 姜德云
Owner ZHEJIANG SHENGHUI CHEM
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