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A kind of production method of calcium hydrogen citrate

A technology of calcium hydrogen citrate and its production method, which is applied in chemical instruments and methods, carboxylate preparation, carboxylate preparation, etc., and can solve the problem of imperfect calcium hydrogen citrate process control conditions and the inability to achieve the best process optimization effect , Calcium hydrogen citrate particle size is uneven, etc., to achieve the effect of crystal particles, large crystal particles, and uniform crystal particles

Active Publication Date: 2018-06-01
JIANGSU GUOXIN UNION ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calcium hydrogen citrate process has certain requirements and restrictions on the quality of the neutralizer, calcium citrate in the previous section and the clear liquid, otherwise the best optimization effect of the process cannot be realized; and because the calcium hydrogen citrate process control conditions are not Perfect and other characteristics (such as the ambiguity of pH), so there are still shortcomings such as uneven particle size of calcium hydrogen citrate, calcium carbonate and other impurities, etc., which enter the acid hydrolysis section.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of production method of calcium hydrogen citrate, comprises the steps:

[0023] (1) Add 14% citric acid clear solution to 1# reaction barrel and heat to 80°C;

[0024] (2) Add 30% calcium citrate slurry into the 1# barrel. When the acidity of the system reaches 7%, add citric acid clear liquid and calcium citrate at the same time to keep the material ratio of citric acid and calcium ions at 1:3 ;

[0025] (3) The material in the 1# reaction barrel gradually overflows to the 2# reaction barrel. Since the material has gradually started to react in the 1# barrel to form calcium hydrogen citrate, the acidity of the system will decrease. Continuously and evenly add citric acid clear liquid in the 2# bucket to keep the acidity of the system at 6%, and the molar ratio of citric acid to calcium ions is 1:1.3, so that a large amount of crystallization can generate calcium hydrogen citrate under the condition of stable supersaturation;

[0026] (4) The material in the 2#...

Embodiment 2

[0031] A kind of production method of calcium hydrogen citrate, comprises the steps:

[0032] (1) Add 12% citric acid clear solution to 1# reaction barrel and heat to 85°C;

[0033] (2) Add 30% calcium citrate slurry into the 1# barrel. When the acidity of the system reaches 6%, add citric acid clear liquid and calcium citrate at the same time to keep the material ratio of citric acid and calcium ions at 1:3.5 ;

[0034] (3) The material in the 1# reaction barrel gradually overflows to the 2# reaction barrel. Since the material has gradually started to react in the 1# barrel to form calcium hydrogen citrate, the acidity of the system will decrease. Continuously and evenly add citric acid clear liquid in the 2# barrel to keep the acidity of the system at 5%, and the molar ratio of citric acid to calcium ions is 1:1.5, so that a large amount of crystallization can generate calcium hydrogen citrate under the condition of stable supersaturation;

[0035] (4) The material in the ...

Embodiment 3

[0040] A kind of production method of calcium hydrogen citrate, comprises the steps:

[0041] (1) Add 10% citric acid clear solution to 1# reaction barrel, and heat to 88°C;

[0042](2) Add 30% calcium citrate slurry into the 1# barrel. When the acidity of the system reaches 5%, add citric acid clear liquid and calcium citrate at the same time to keep the material ratio of citric acid and calcium ions at 1:4 ;

[0043] (3) The material in the 1# reaction barrel gradually overflows to the 2# reaction barrel. Since the material has gradually started to react in the 1# barrel to form calcium hydrogen citrate, the acidity of the system will decrease. Continuously and evenly add citric acid clear liquid into the 2# bucket to keep the acidity of the system at 4.5%, and the molar ratio of citric acid to calcium ions is 1:2, so that a large amount of crystallization can generate calcium hydrogen citrate under the condition of stable supersaturation;

[0044] (4) The material in the ...

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Abstract

The invention discloses a production method of calcium hydrogen citrate. Primarily, some of the citric acid solution is preliminarily mixed with tricalcium, and the rest of the citric acid solution is added in different stages and different time; thus, the acidity of the calcium hydrogen citrate reaction is kept at a proper level, the supersaturation degree of the calcium hydrogen citrate reaction can be sufficiently reduced, large-particle uniform calcium hydrogen citrate crystal can be obtained, and impurities are not embedded easily. In the invention, after the produced calcium hydrogen citrate is treated by a belt filter, the moisture and RCS are relatively low, the treatment pressure of the acidolysis section is effectively relieved, and the purity of acidolysis liquid is increased.

Description

technical field [0001] The invention relates to a production method of calcium hydrogen citrate. Background technique [0002] Citric acid is the largest acid among organic acids. Because of its outstanding physical properties, chemical properties and derivative properties, it has become the most important organic acid in food, medicine, daily chemical and other industries. The extraction methods of citric acid at home and abroad mainly include calcium salt method, chromatography, membrane separation method and extraction method. The preparation method for producing citric acid by fermentation method includes: fermenting starchy raw materials (corn, cassava and sorghum, etc.) Purification or physical purification (chromatography and extraction) to obtain a citric acid solution with higher purity, and finally to obtain citric acid products through steps such as concentration and drying. At present, traditional calcium salt method or hydrogen calcium method is generally used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C59/265
CPCC07C51/412C07C59/265
Inventor 胡志杰陈坚石贵阳苗茂栋周东姣孙福新王盛伟
Owner JIANGSU GUOXIN UNION ENERGY CO LTD
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