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Method for producing low lead granular magnesium citrate

A technology of magnesium citrate and citric acid, which is applied in the direction of carboxylate preparation, active ingredients of anhydride/acid/halide, non-active ingredients of polymer compounds, etc., can solve the problem of lack of magnesium citrate and no public Patent and other issues

Inactive Publication Date: 2009-12-02
NANTONG FEIYU FINE CHEM
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  • Summary
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Problems solved by technology

[0002] At present, there is no detailed information on the method of producing magnesium citrate in China, and there is no published patent. Magnesium citrate products are used as medicine and edible raw materials abroad. At present, heavy metals such as lead are easily brought into the production of magnesium citrate, and General production methods can not get crystallized or powdered magnesium citrate

Method used

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Embodiment Construction

[0005] A method for producing low-lead granular magnesium citrate provided by the invention is as follows: use magnesium sulfate and sodium carbonate as raw materials to first prepare magnesium carbonate, then react magnesium carbonate with citric acid to prepare magnesium citrate, and its specific implementation for:

[0006] a. Magnesium sulfate (containing water of crystallization) is first dissolved in water, filtered to remove impurities, and magnesium sulfate solution is obtained (magnesium sulfate and water weight ratio are 1: 0.8);

[0007] B the magnesium sulfate solution that makes is carried out metathesis reaction with sodium carbonate, and its weight ratio is (magnesium sulfate: sodium carbonate=1: 0.525) makes magnesium carbonate through dehydration, washing;

[0008] c the above magnesium carbonate and edible citric acid and water according to the following weight ratio (magnesium carbonate: edible citric acid: water=1: 1.67: 2,) first add citric acid to water, ...

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Abstract

The invention relates to a method for producing low lead granular magnesium citrate, which is a production technology characterized by preparing magnesium carbonate from magnesium sulfate and sodium carbonate, and preparing magnesium citrate through a neutralization reaction of the magnesium carbonate and citric acid. The magnesium citrate which is the final product of the method can be granular or powdery magnesium citrate, and the quality of the magnesium citrate can reach and exceed the standard of USP30 / NF25. The method can control the lead content to be less than 0.000010 percent on specification, and granular and powdery products can be acquired by sizing according to market demands.

Description

technical field [0001] The invention relates to a method for producing magnesium citrate, in particular to a method for producing low-lead granular magnesium citrate. Background technique [0002] At present, there is no detailed information on the method of producing magnesium citrate in China, and there is no published patent. Magnesium citrate products are used as medicine and edible raw materials abroad. At present, heavy metals such as lead are easily brought into the production of magnesium citrate, and General production methods cannot obtain crystalline or powdered magnesium citrate. Contents of the invention [0003] The present invention aims at above production shortcoming, provides a kind of method of producing low-lead granular magnesium citrate, and it utilizes magnesium sulfate and sodium carbonate to make magnesium carbonate, and food-grade citric acid neutralization reaction, produces magnesium citrate, and its reaction The principle is: MgSO 4 +Na 2 CO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/265C07C51/41A61K31/19A61K9/14A61K47/40
Inventor 姚建飞
Owner NANTONG FEIYU FINE CHEM
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