Method of preparing low impurity content, clear and transparent food grade lecithin and product

A kind of lecithin, low impurity technology, applied in the field of separation and purification of food additives

Inactive Publication Date: 2007-04-18
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) High temperature resistance and corrosion resistance Inorganic ceramic membranes have high stability in high temperature, caustic and microbial erosion environments. In theory, well-treated ceramic membranes can withstand high temperatures around 1000K, any pH value and various Such a corrosive environment, there is no polymer material film with such a wide range of applicability

Method used

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  • Method of preparing low impurity content, clear and transparent food grade lecithin and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Take 3kg of feed grade soybean lecithin, add 12 liters of industrial hexane according to the weight to volume ratio, filter with a 0.2 μm membrane at 50°C and a filtration pressure of 0.15Mpa, and concentrate to 1.2 liters. An additional 3.6 liters of solvent was added to the concentrate, and the concentration was continued to 2 liters. The two filtrates were combined, and the solvent was evaporated to obtain the product of the present invention.

Embodiment 2

[0056] Get 3kg of feed grade soybean lecithin, add 9 liters of industrial hexane to dissolve, and make a solution. Filtrate with a 0.1 μm membrane at 50° C. and a filtration pressure of 0.15 MPa, and concentrate to 1 liter. The obtained filtrate is subjected to rotary evaporation to obtain filtered lecithin.

Embodiment 3

[0058] Get 3kg of feed grade soybean lecithin, add 21 liters of industrial hexane to dissolve, and make a solution. Filtrate with a 0.6 μm membrane at 50° C. and a filtration pressure of 0.15 MPa, and concentrate to 3 liters. The obtained filtrate is subjected to rotary evaporation to obtain filtered lecithin.

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Abstract

The present invention relates to a method for preparing low impurity content, clear and transparent food-grade lecithin by utilizing inorganic ceramic membrane separation process, belonging to the field of separation and purification technology of food additive. Said method includes the following steps: using industrial hexane to dissolve feed-grade soybean lecithin to obtain its solution, using inorganic membrane to filter said solution at 40-55 deg.C, its filtering pressure is 0.1-0.4MPa, concentrating filtrate and evaporating so as to obtain the invented product.

Description

(1) Technical field [0001] The invention relates to a method for separating and preparing clear and transparent food-grade lecithin with low impurity content, especially a method for separating and preparing low-impurity content and clear and transparent food-grade lecithin by using an inorganic ceramic membrane. The invention belongs to the field of separation and purification of food additives. (2) Background technology [0002] Soybean lecithin is a by-product of the edible oil industry and is mainly used as an emulsifier, wetting agent, anti-splashing agent and release agent in the food industry. At the same time, phospholipids also have the effects of lowering blood fat, protecting the liver, and beautifying the skin. Phospholipids are also widely used in health food, cosmetics, and pharmaceutical industries. Lecithin has two hydrophobic long fatty acid chains and hydrophilic phosphate ions and base ions in its molecular structure, and is a typical ionic surfactant. B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/10
Inventor 汪勇
Owner JINAN UNIVERSITY
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