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Preparation method of gelatin

A gelatin and process technology, applied in the field of preparation of gelatin, can solve the problems of consuming large energy, a large amount of steam, etc., and achieve the effects of saving energy, improving transparency, and reducing yield

Inactive Publication Date: 2003-09-17
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At 80°C, the concentration of gelatin solution is concentrated from 5 to 8wt% to about 25wt%, which requires a large amount of steam; at the same time, superheated steam is used in the sterilization process to sterilize at 140°C, which undoubtedly affects the viscosity and freezing strength of gelatin. Causes varying degrees of thermal degradation and consumes a lot of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Under the closed condition of the system, adjust the pH value of the solution to 5.5 to 6.5 with phosphoric acid or sodium hydroxide to the gelatin solution with a concentration of 5 to 8 wt%, and maintain the temperature at 52 to 55°C through a heat exchanger. Put it into a microfilter with a protective device and a membrane pore size of 0.45 μm for filtration, its transparency is greatly improved, and the content of bacteria and impurities is reduced.

Embodiment 2

[0022] Under the closed condition of the system, the gelatin solution filtered in Example 1 is pumped into a roll-type membrane ultrafilter with a molecular weight cut-off of 10,000 with a centrifugal pump at a temperature of 52 to 55° C. for circulation and concentration until the gelatin solution Concentration is completed when the concentration reaches 15-20 wt%, and the salt content in the gelatin solution is reduced at the same time.

Embodiment 3

[0024] Under the closed condition of the system, adjust the pH value of the solution to 5.5-6.5 with phosphoric acid or ammonium hydroxide to the gelatin solution that has been extracted to a concentration of 5-8 wt%, and maintain the temperature at 50-60°C through a heat exchanger, and use a pump Put it into a microfilter with a protective device and a membrane pore size of 0.45 μm for filtration; after filtration, the filtrate is pumped into an ultrafilter with a molecular weight cut-off of 5000MW for circulation and concentration, and when the concentration reaches 15-20wt%, pump the concentrate Put it into a 0.2μm microfilter for further processing to achieve the purpose of sterilization, and the bacterial detection content of the concentrated liquid after filtration is zero.

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Abstract

A process for preparing gelatin features use of membrane technology and includes such steps as regulating the pH value of extracted gelatin solution to 5.5-6.5 in the condition of sealing system, andthe gelatin solution flowing through a combined membrane unit for filtering, concentrating, and removing bacteria at 50-60 deg.C. The resultant gelatin features high viscosity and coagulating and freezing strength, and low cost.

Description

technical field [0001] The invention belongs to the field of gelatin preparation, and in particular relates to a method for preparing gelatin by applying membrane technology to gelatin filtration sterilization and concentration processes. Background technique [0002] Gelatin is a natural protein extracted from animal skin and bone after treatment. Its excellent physical and chemical properties are widely used in the fields of science, biomaterials and industrial technology. Gelatin is a heat-sensitive protein. In its production process, filtration, evaporation concentration, and sterilization are important processes for gelatin production. The pros and cons of the process conditions have a great impact on the physical and chemical properties of gelatin. In the traditional production process, the gelatin solution is concentrated, filtered, sterilized, etc., and the cotton cake type plate frame and diatomaceous earth are still used for filtration....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H1/06
Inventor 刘宣亚王昌琦
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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