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Method for preparing washing surfactant by utilizing tanning waste chrome shavings

A technology of surfactant and chrome leather scraps, applied in the field of preparation of surfactants for washing, can solve problems such as environmental pollution, waste of raw material leather resources, etc., solve the problem of environmental pollution, have excellent degreasing effect, and facilitate cake making and granulation Effect

Inactive Publication Date: 2014-01-22
山东全杰皮革研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It not only wastes the excellent raw leather resources, but also causes great environmental pollution

Method used

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  • Method for preparing washing surfactant by utilizing tanning waste chrome shavings
  • Method for preparing washing surfactant by utilizing tanning waste chrome shavings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing detergent surfactants from tanning waste ， Follow the steps below:

[0030] (1) Dechroming the original form of chrome leather shavings: Add 7g of dried CaO, 50g of chrome leather shavings, and 500mL of distilled water into a beaker, mix evenly, soak at 35°C for 1 day, wash with water and filter to get the filter residue. Add 6g NaCl, 300mL distilled water, 15g oxalic acid and 15mL concentrated sulfuric acid, stir and mix, dechrome at 30°C for 3h, wash and filter with water to get the filter residue, add 250mL distilled water, 10gNaOH and 5g NaCl, dechrome at 20°C for 30min, adjust the pH to neutral , washed with water and filtered to take the filter residue; after drying, the original form of the dechromium product was obtained.

[0031] (2) Prepare protein polypeptide hydrolyzate by hydrolyzing the dechromed product in its original form: Add 0.8g of calcium oxide and 100ml of distilled water for every 20g of the dechromed product in its origina...

Embodiment 2

[0040] A method for preparing detergent surfactants from tanning waste ， Follow the steps below:

[0041] (1) Dechroming the original form of chrome leather shavings: Add 5g of dried CaO, 50g of chrome leather shavings, and 500mL of distilled water into the beaker, mix evenly, soak at 30°C for 48h, wash with water and filter to get the filter residue. Add 5g NaCl, 360mL of distilled water, 10g of oxalic acid and 15mL of concentrated sulfuric acid, stir and mix, dechrome at 25°C for 2h, wash and filter to get the filter residue, add 350mL of distilled water, 5gNaOH and 10g NaCl, dechrome at 30°C for 60min, adjust the pH to neutral , washed with water and filtered to take the filter residue; after drying, the original form of the dechromium product was obtained.

[0042](2) Prepare the protein polypeptide hydrolyzate by hydrolyzing the dechromed product in its original form: add 1.6g of calcium oxide and 50ml of distilled water for every 20g of the dechromed product in its orig...

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Abstract

The invention relates to a method for preparing washing surfactant by utilizing tanning waste chrome shavings. The method comprises the following steps: performing protomorphic dechromization on the tanning waste chrome shavings to obtain a chrome shaving protomorphic dechromized product; hydrolyzing the obtained chrome shaving protomorphic dechromized product to obtain protein polypeptide hydrolysate; performing acylation condensation by utilizing fatty acyl chloride to obtain an initial product of the surfactant; and adding sodium carbonate, sodium dodecyl benzene sulfonate, absolute ethyl alcohol and sodium benzoate, and stirring to react to obtain the final product washing surfactant. If the surfactant prepared by utilizing waste leftovers in tanning can be popularized and applied, the problem of environmental pollution caused by tanning waste can be effectively solved, and the production cost for the surfactant product can be greatly reduced.

Description

technical field [0001] The invention relates to a method for preparing a cleaning surfactant by using tanning waste. Background technique [0002] The main problems faced by the tanning industry are the great waste of resources and the great pollution of the environment. In the process of leather product manufacturing, the leather products that can be sold account for about 20% of the raw leather quality, and the rest are discarded as tanning waste. It not only wastes excellent raw material leather resources, but also causes great environmental pollution. [0003] It is reported that the American tanning industry produces about 70,000 tons of chromium-containing leather waste every year, and the Indian tanning industry discharges more than 160,000 tons of tanning waste every year. As many as 1.4 million tons, which contains waste chrome leather shavings. And these tanning wastes are one of the chief culprits that cause the pollution of the tanning industry to become incre...

Claims

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Application Information

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IPC IPC(8): C11D1/83C11D3/60C11D3/10C11D3/20C07K1/12C14C1/08
Inventor 王全杰曲家乐
Owner 山东全杰皮革研究所有限公司
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