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Method of preparing calcium propionate using egg shell

A calcium propionate, egg shell technology, applied in the field of chemical treatment, can solve the problems of destroying the natural activity of egg shells, polluting the environment, high energy consumption, etc., and achieving the effects of avoiding environmental pollution, high reaction yield and solving environmental pollution

Inactive Publication Date: 2004-08-04
张小燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems of high energy consumption, high cost, environmental pollution and destruction of the natural activity of eggshells in the prior art
The present invention solves the problems of high energy consumption, high cost, environmental pollution and destruction of the natural activity of eggshells in the prior art

Method used

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  • Method of preparing calcium propionate using egg shell
  • Method of preparing calcium propionate using egg shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: This embodiment is the preferred embodiment

[0032] (1) shell membrane separation

[0033] The eggshells are roughly crushed with a roller-type pulverizer with a blower, and the shells and membranes are completely separated, and the egg membranes are used for other purposes. After the membranes are separated, the shells are pulverized with a mill-type pulverizer to a fineness of 0.125mm;

[0034] (2) Neutralization reaction

[0035] at 3.0M 3 Put 2.3T of water into the reaction pot, start the agitator to stir, the stirring speed is 100 rpm, add 145kg of eggshell powder under constant stirring, and then add 175k9 industrial propionic acid for neutralization reaction, after 3 hours of reaction Add Ca(OH) 2 , CaO and NaOH, when adjusting the pH value of the reaction system to 13.0, continue to react for half an hour;

[0036] (3) filter

[0037] The materials that have completed the reaction are pumped into a plate-and-frame filter press for filtration,...

Embodiment 2

[0046] (1) shell membrane separation

[0047] The eggshells are roughly crushed with a roller-type pulverizer with blower, and the shells and membranes are completely separated, and the egg membranes are used for other purposes. After the membranes are separated, the shells are pulverized to a fineness of 0.140mm by a mill-type pulverizer;

[0048] (2) Neutralization reaction

[0049] at 3.0M 3 Put 2.5T of water into the reaction pot, start the stirrer to stir, the stirring speed is 120 rpm, add 142kg of eggshell powder under constant stirring, then add 180kg of industrial propionic acid for neutralization reaction, and react for 3.5h After adding Ca(OH) 2 , CaO and NaOH, when the pH value of the reaction system is adjusted to be greater than 13.0, the reaction is continued for one and a half hours;

[0050] (3) filtering is identical with embodiment 1;

[0051] (4) Concentration under reduced pressure

[0052] The filtered filtrate was adjusted to pH=8.0 with propionic a...

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Abstract

A process for preparing calcium propionate from egg shell is disclosed, which is based on the principle: CaCO3+2CH3CH2COOH -><-Ca(CH3CH2COO)2+H2O+Co2, and includes such steps as breaking, neutralizing reaction, filtering, concentrating and drying. Its advantages are low energy consumption and environmental pollution, and low cost.

Description

Technical field: [0001] The invention relates to the technical field of chemical treatment, in particular to a method for preparing calcium propionate from egg shells. Background technique: [0002] Calcium propionate is a new type of non-toxic food and feed grade preservative developed in my country in recent years. It has a good killing effect on mold, aerobic bacillus and Gram-negative bacteria, but it is harmless to yeast, and it can also inhibit the production of aflatoxin, so it is widely used in bread, pastry, cheese preservatives and feed preservatives. This product is non-toxic and has no side effects on the human body. According to the report of the World Food and Agriculture Organization and the World Health Organization (FAO / wHo), calcium propionate, like other fatty acids, can be absorbed by the human body through metabolism and supply the necessary calcium for the human body. This advantage is unmatched by other preservatives. The preparation methods of calc...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C53/122
Inventor 张小燕杨德玉
Owner 张小燕
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