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Magnesium citrate crystal and production method thereof

A technology of magnesium citrate and its production method, which is applied in chemical instruments and methods, carboxylate preparation, carboxylate preparation, etc., and can solve problems such as inclusion and excess of reactants, low content of magnesium citrate crystals, doping, etc. , to increase content, prevent double-teaming and overdose

Inactive Publication Date: 2017-06-16
COFCO BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the trapping and excessive of reactant that the method for producing magnesium citrate crystal easily takes place in the prior art, and cause doping with reactant in the magnesium citrate crystal that makes, the content of magnesium citrate crystal is relatively high Low defect, provide a kind of production method of magnesium citrate crystal, and the magnesium citrate crystal prepared by this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment is used to illustrate magnesium citrate crystal of the present invention and production method thereof

[0045] The citric acid content is 25% by weight (density is 1102 kg / m 3 ) of citric acid feed solution once injected effective volume is 8m 3 In the crystallizer, then the magnesia slurry (based on the magnesia slurry, the content of magnesium element is 20% by weight) in 5m 3 The rate of / hour is continuously injected into the citric acid feed liquid for reaction crystallization. During the injection process, the temperature of the reaction crystallization is kept at 70°C, and the reaction end point is controlled by an online pH meter. When the pH of the feed liquid in the crystallizer is 6.8 , stop injecting the magnesium oxide slurry, keep it for 20 minutes, and obtain the crystal slurry liquid, then discharge the crystal slurry liquid, and carry out solid-liquid separation, and then dry at 90°C for 30 minutes to obtain the magnesium citrate crys...

Embodiment 2

[0047] This embodiment is used to illustrate magnesium citrate crystal of the present invention and production method thereof

[0048]The citric acid content is 20% by weight (density is 1081 kg / m 3 ) of citric acid feed solution once injected effective volume is 8m 3 In the crystallizer, then the magnesia slurry (based on the magnesia slurry, the content of magnesium element is 25% by weight) in 2.6m 3 The rate of / hour is continuously injected into the citric acid feed liquid for reaction crystallization. During the injection process, the temperature of the reaction crystallization is kept at 90°C, and the reaction end point is controlled by an online pH meter. When the pH of the feed liquid in the crystallizer is 7.5 , stop injecting the magnesium oxide slurry, keep it for 30 minutes, and obtain the crystal slurry liquid, then discharge the crystal slurry liquid, and carry out solid-liquid separation, and then dry at 110°C for 20 minutes to obtain the magnesium citrate cr...

Embodiment 3

[0050] This embodiment is used to illustrate magnesium citrate crystal of the present invention and production method thereof

[0051] The citric acid content is 35% by weight (density is 1144 kg / m 3 ) of citric acid feed solution once injected effective volume is 8m 3 In the crystallizer, then the magnesium hydroxide slurry (based on the magnesium hydroxide slurry, the content of magnesium element is 15% by weight) with 9.5m 3 The rate per hour is continuously injected into the citric acid feed liquid for reaction crystallization. During the injection process, the temperature of the reaction crystallization is kept at 60°C, and the reaction end point is controlled by an online pH meter. When the pH of the feed liquid in the crystallizer is 6.0 , stop injecting the magnesium oxide slurry, keep it for 10 minutes, and obtain the crystal slurry liquid, then discharge the crystal slurry liquid, and carry out solid-liquid separation, and then dry at 70°C for 40 minutes to obtain t...

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Abstract

The present invention relates to a magnesium citrate crystal production method, which comprises: injecting a magnesium salt slurry into a citric acid material liquid containing 1 kg of citric acid at a rate of 1-3.5 l / h, carrying out reaction crystallization, stopping the injecting when the pH value of the citric acid material liquid is 5.5-7.8, and maintaining for 10-30 min to obtain a crystal slurry. The invention further relates to a magnesium citrate crystal prepared through the preparation method. According to the present invention, the content of the magnesium citrate crystal prepared by using the method of the present invention is up to 99.2-99.9 wt%.

Description

technical field [0001] The invention relates to a production method of magnesium citrate crystals and the magnesium citrate crystals prepared by the method. Background technique [0002] Magnesium citrate containing 9 crystal water, white or light yellow powder, non-toxic, non-corrosive. Its magnesium content is as high as 11%, and the contained magnesium is easily absorbed by the body, so it is a very important source of magnesium nutritional supplements. Magnesium citrate can be used as medicine, and its most common medical use is as a physiological Saline laxatives. When magnesium citrate is used for medical purposes, the quality requirements for magnesium citrate are high. [0003] At present, magnesium citrate is produced in industry by using magnesium carbonate, magnesium oxide or magnesium hydroxide as raw material to react with edible citric acid. The specific production method is: add citric acid to water to dissolve and filter, and when the temperature reaches 70...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C59/265
CPCC07C51/412C07C59/265
Inventor 李北周勇许贵珍宋加友
Owner COFCO BIOTECHNOLOGY CO LTD
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