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A kind of preparation method of protein-based surfactant

A surfactant and protein-based technology is applied in the field of preparation of surfactants to achieve the effects of easy biodegradation, strong biodegradability and good wetting performance

Active Publication Date: 2017-12-08
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, comprehensive utilization of chromium-containing tanning waste to solve environmental pollution problems, on the other hand, synthesis of protein-based surfactants with good biocompatibility, high surface activity and high degradability

Method used

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  • A kind of preparation method of protein-based surfactant
  • A kind of preparation method of protein-based surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of compound polypeptide hydrolyzate: Dry 30g of blue leather scraps from the tannery in an oven to constant weight and crush them into leather scraps, take 20g of dried leather scraps and place them in a tank equipped with a condenser tube, thermometer and agitator In a three-necked flask, 2g of tetramethylammonium hydroxide was dissolved to a concentration of 5g / L, and added to the three-necked flask. Control the temperature of the water bath in the three-necked flask to 80°C, and the hydrolysis time is 8 hours. Hydrolyze the chromium-containing leather scraps. After the hydrolysis, filter, transfer to an oven, bake at 130°C until 0.5h to decompose excess tetramethylammonium hydroxide, and distill under reduced pressure Concentrate the hydrolyzate to a concentration of 0.2g / ml, and store it in the refrigerator at 0-4°C for later use; the viscosity-average molecular weight of the hydrolyzed compound polypeptide hydrolyzate is M η =40000~50000.

[0024] ...

Embodiment 2

[0027] (1) Preparation of compound polypeptide hydrolyzate: 30g of blue leather scraps (leather shavings) from the tannery are dried to constant weight in an oven and pulverized into leather shavings; In a three-necked flask with a thermometer and a stirrer, dissolve 1.8 g of tetramethylammonium hydroxide to a concentration of 6 g / L, and add it into the three-necked flask. Control the temperature of the water bath in the three-necked flask to 85°C, and the hydrolysis time is 9 hours to hydrolyze the leather shavings containing chromium. After the hydrolysis is completed, filter, transfer to an oven, bake at 140°C for 0.5h to decompose excess tetramethylammonium hydroxide, and distill under reduced pressure The concentration of the concentrated hydrolyzate is 0.3g / ml, and it is stored in the refrigerator at 0-4°C for later use;

[0028] (2) Preparation of phase transfer catalyst: Take 15g of the above-mentioned concentrated hydrolyzate and place it in a three-necked flask, and ...

Embodiment 3

[0031] (1) Preparation of compound polypeptide hydrolyzate: 30g of blue leather scraps (leather shavings) from the tannery are dried to constant weight in an oven and pulverized into leather shavings; In a three-necked flask with a thermometer and a stirrer, dissolve 2 g of tetramethylammonium hydroxide to a concentration of 5 g / L, and add it into the three-necked flask. Control the temperature of the water bath in the three-necked flask to 90°C, and the hydrolysis time is 10 hours to hydrolyze the leather shavings containing chromium. After the hydrolysis, filter, transfer to an oven, bake at 145°C for 0.5h to decompose excess tetramethylammonium hydroxide, and distill under reduced pressure Concentrate the hydrolyzate to a Baume degree of 0.4g / ml, and store it in the refrigerator at 0-4°C for later use;

[0032](2) Preparation of phase transfer catalyst: take 20 g of the above-mentioned concentrated hydrolyzate and place it in a three-necked flask, and dissolve 4 g of 2,3-ep...

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Abstract

The invention discloses a preparation method of a protein-based surfactant, which uses a hydrolysis method to hydrolyze leather scraps to hydrolyze macromolecular proteins into a composite polypeptide hydrolyzate; and concentrates the hydrolyzate by vacuum distillation to obtain As a raw material for the preparation of protein-based surfactants, under the action of a self-made phase transfer catalyst-composite polypeptide quaternary ammonium salt surfactant, it is respectively mixed with lauroyl chloride, myristoyl chloride, palmitoyl chloride and oleoyl chloride with different carbon chain lengths. The classic Schotten‑Baumann (Schotten‑Baumann) condensation reaction to prepare N‑laurel, nutmeg, palm, oleoyl complex polypeptide surfactants. The problem of environmental pollution of tanning wastes is solved, and the protein resources are recovered reasonably, and the obtained products have good application prospects.

Description

technical field [0001] The invention relates to a preparation method of a surfactant. technical background [0002] As the world's largest tannery country, my country's annual output of solid waste is as high as 1.4 million tons, of which chromium-containing solid waste is as high as 280,000 tons. But still there is not a kind of chromium-containing leather shavings treatment method that can both consume chromium-containing leather shavings in large quantities and prevent secondary pollution in the prior art. [0003] Since the 1970s, my country has successfully developed the detergent "Remibang", which opened up a new way for the comprehensive utilization of my country's leather waste. In recent years, many researchers at home and abroad have deeply processed waste protein into high value-added food or fine chemical ingredients. [0004] Protein surfactant is a green and environment-friendly surfactant developed in recent years. It has attracted more and more attention du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/30B01F17/22C07K1/12C09K23/30C09K23/22
CPCC07K1/12C09K23/00C09K23/16
Inventor 刁屾栾俊王全杰赵丹丹段宝荣张萌萌石磊罗艳华
Owner YANTAI UNIV
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