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Ocean oil spilling gelling agent prepared by leather leftover bits and pieces and preparation method thereof

A technology of leftovers and oil coagulant, which is applied in the direction of chemical instruments and methods, other chemical processes, etc., can solve the problems of leather waste disposal, environmental pollution, etc., achieve low raw material cost, simple preparation method, and suitable for large-scale Promoted app performance

Inactive Publication Date: 2008-01-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Our country is a big country of tanning, which produces a large amount of leather scraps every year. The main component of these leather scraps is collagen, which is a precious natural resource. Discarded, causing serious pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Extraction of collagen by hydrolysis: separate the leftovers of leather, and select different hydrolysis processes according to different cortex. Four hydrolysis processes are specifically provided below, and collagen with a large molecular weight can be obtained by using these four processes.

[0025] ①Acidic hydrolysis. First clean the leftover cowhide leather with tap water, soak it with 20% calcium hydroxide aqueous solution for 10 hours, then cut it into small pieces, add water 5 times the tare weight and 5% hydrochloric acid aqueous solution (concentration is 30%), and control the pH At 4.0, the temperature was raised to 105° C., and the reaction was terminated after 10 h. The remaining skin dregs were separated and removed, and the filtrate was evaporated and concentrated by a rotary evaporator to obtain collagen with a mass concentration of 80%.

[0026] ② Alkaline hydrolysis. Add 5 times water and 10% calcium hydroxide aqueous solution with a concentrati...

Embodiment 2

[0033] (1) Extraction of collagen by hydrolysis: separate the leftovers of leather, and select different hydrolysis processes according to different cortex.

[0034] ①Acidic hydrolysis. First clean the leftover cowhide leather with tap water, soak it in 10% calcium hydroxide aqueous solution for 6 hours, then cut it into small pieces, add water 10 times the tare weight and 5% hydrochloric acid aqueous solution (concentration is 30%), and control the pH at 4.0, the temperature was raised to 110°C, and the reaction was terminated after 8 hours. Separating and removing the remaining skin dregs, and evaporating and concentrating the filtrate to obtain collagen.

[0035] ② Alkaline hydrolysis. Add 10 times the weight of leather shavings to shavings of cowhide wet blue leather and 20% calcium hydroxide aqueous solution at a concentration of 5%, keep the pH at 9 to 9.5, the temperature is 40 to 60°C, and the reaction time is 4 hours. After suction filtration, the filtrate was neut...

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PUM

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Abstract

The invention discloses a making method of oil-condensing agent through leftover bits and pieces of leather in the making technical domain of oil-condensing agent, which comprises the following steps: (1)hydrolyzing the leftover bits and pieces of leather to extract collagen; (2)carboxymethylating the collagen: using sodium monochloracetate or chloroacetic acid to extract the collagen to modify; reducing the solubility of the collagen; controlling the molar rate of peptide bond of collagen and sodium monochloracetate or chloroacetic acid between 5: 3 and 5: 1 to control the modifying degree of the collagen; (3)acylachlorinating the collagen: using oil acylachlorine p-carboxy methylated collagen to modify; increasing the lipophilicity of the collagen; controlling the molar rate of peptide bond of collagen and oil acylachlorine between 5: 3 and 5: 1 to control the modifying degree of acylachlorinated collagen; (4)complexing to modify the product in the step (3).

Description

Technical field: [0001] The invention relates to the technical field of a preparation process of an oil coagulant, in particular to a method for preparing an oil coagulant by using leather waste. Background technique: [0002] Due to various reasons, a large amount of oil overflows into the ocean every year in various sea areas all over the world, which seriously damages the ecological environment of the ocean. In order to prevent oil from polluting the sea, a series of regulations and agreements have been drawn up internationally and in various coastal countries, and great attention has been paid to the research on the effective disposal, recovery and removal of oil spills. After the oil spills to the sea surface, its further diffusion is generally restricted first. After the diffusion is restricted, an oil coagulant can be used to make it gather and condense, and then it is recovered and processed by a mechanical recovery device. [0003] When the thickness of the oil lay...

Claims

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Application Information

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IPC IPC(8): C09K3/32
Inventor 王学川任龙芳强涛涛侯立猛贾继章丁志文
Owner SHAANXI UNIV OF SCI & TECH
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