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Preparation method of collagen-degradation-product-based sand-fixing water-retention agent

A collagen and degradable technology, applied in chemical instruments and methods, fertilizer mixtures, applications, etc., can solve the problems that waste cannot be buried and incinerated, hinder the sustainable development of tanning, and achieve good environmental and economic benefits. Improve wind erosion resistance, compressive strength, and storage stability

Inactive Publication Date: 2015-09-09
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These wastes cannot be buried and incinerated, and will become the key to hindering the sustainable development of tanning

Method used

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  • Preparation method of collagen-degradation-product-based sand-fixing water-retention agent
  • Preparation method of collagen-degradation-product-based sand-fixing water-retention agent
  • Preparation method of collagen-degradation-product-based sand-fixing water-retention agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the sand-fixing and water-retaining agent of protein degradation products comprises the following processes:

[0023] (1) Extraction of collagen degradation products

[0024] After washing and drying the shavings and leftover scraps of cowhide, sheepskin, and pigskin wet blue leather, they are crushed to particles with a particle size of less than 1 cm, and subjected to high-temperature treatment with 12% slaked lime solution for 5 hours at a temperature of 85 At a temperature of ~90°C, adjust the pH to neutral with sulfuric acid, and then undergo decolorization, flocculation, and liquid-solid pressure filtration separation to obtain a collagen degradation solution. The relative mass fraction of collagen degradation products in the collagen degradation solution is 50%, containing Cr 2 o 3 ≤5mg / kg, containing ash ≤5g / kg, the appearance is a light yellow transparent solution, and the relative molecular weight of the collagen degradation product...

Embodiment 2

[0029] The preparation method of the sand-fixing and water-retaining agent of protein degradation products comprises the following processes:

[0030] (1) Extraction of collagen degradation products

[0031] After washing and drying the shavings and leftover waste of cowhide, sheepskin, and pigskin wet-blue leather, crush them to particles with a particle size of less than 1 cm, and perform a high-temperature treatment with a slaked lime solution with a mass content of 5% for 10 hours at a temperature of 85 At a temperature of ~90°C, adjust the pH to neutral with sulfuric acid, and then undergo decolorization, flocculation, and liquid-solid pressure filtration separation to obtain a collagen degradation solution. The relative mass fraction of collagen degradation products in the collagen degradation solution is 50%, containing Cr 2 o 3 ≤5mg / kg, containing ash ≤5g / kg, the appearance is a light yellow transparent solution, and the relative molecular weight of the collagen degr...

Embodiment 3

[0036] The preparation method of the sand-fixing and water-retaining agent of protein degradation products comprises the following processes:

[0037] (1) Extraction of collagen degradation products

[0038] After washing and drying the shaved leather scraps and leftover scraps of cowhide, sheepskin, and pigskin wet-blue leather, crush them to particles with a particle size of less than 1 cm, and perform high-temperature treatment with 8% slaked lime solution for 7 hours at a temperature of 85 At a temperature of ~90°C, adjust the pH to neutral with sulfuric acid, and then undergo decolorization, flocculation, and liquid-solid pressure filtration separation to obtain a collagen degradation solution. The relative mass fraction of collagen degradation products in the collagen degradation solution is 50%, containing Cr 2 o 3 ≤5mg / kg, containing ash ≤5g / kg, the appearance is a light yellow transparent solution, and the relative molecular weight of the collagen degradation produc...

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Abstract

The invention relates to a preparation method of a sand-fixing water-retention agent, particularly a preparation method of a collagen-degradation-product-based sand-fixing water-retention agent, which comprises the following steps: cleaning and drying tanning shaving waste scraps, pulverizing, treating with a white lime solution at 85-90 DEG C, regulating the pH value to neutrality with sulfuric acid, decolorizing, flocculating, and carrying out liquid-solid pressure filtration separation to obtain a collagen hydrolysate; heating the collagen hydrolysate to 75-85 DEG C, dropwisely adding vinyl monomer and 4 / 5 of initiator, heating to 80-90 DEG C, adding the rest of initiator, keeping the temperature to react for 1-1.5 hours, and stopping heating; and cooling to 40-45 DEG C, and regulating the pH value to 6.5-7.0 to obtain the sand-fixing water-retention agent. The method regenerates and recovers leather wastes. The prepared sand-fixing water-retention agent has the advantages of favorable water solubility, high storage stability, light fastness and thermal aging resistance, and can form a bonding layer when being sprayed to the sand grain surface, thereby enhancing the wind erosion resistance and compression strength of the sand grains and achieving the goal of san fixation.

Description

technical field [0001] The invention relates to a preparation method of a sand-fixing and water-retaining agent, in particular to a preparation method of a sand-fixing and water-retaining agent based on collagen degradation products. Background technique [0002] In recent decades, land desertification has become one of the main reasons for the deterioration of the global ecological environment. An effective means to prevent land desertification is to fix sand. Sand fixation methods commonly used at present include: plant sand fixation, engineering sand fixation or mechanical sand fixation, chemical sand fixation and other means. Among them, the main mechanism and characteristics of chemical sand fixation are: 1) Chemical sand fixation materials have a bonding effect, and spraying on the surface of sand grains can bond sand grains together to form a consolidation layer and increase the reunion ability of sand grains; 2) ) Chemical sand-fixing materials can form a layer of ...

Claims

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Application Information

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IPC IPC(8): C08F289/00C08F220/06C08F220/56C09K17/18
Inventor 单志华袁鸿昌张本民陈慧
Owner SICHUAN UNIV
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