Preparation method of anhydrous monosodium citrate

An anhydrous citric acid technology and a production method are applied in the fields of medicine, chemical regulator raw material production, food, and daily chemical additives, and can solve the problems of increasing process complexity in the field of production and processing, being unsuitable for direct use, and increasing production costs. , to reduce the concentration time, reduce energy consumption, and achieve the effect of sufficient reaction

Inactive Publication Date: 2018-09-21
DAZIRAN BIOLOGICAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses high-quality baking soda, dissolves it in water according to the calculated amount, neutralizes it with citric acid, and processes it through concentration and crystallization to prepare pharmaceutical grade monosodium citrate, but the cost is high and the investment is large.
[0011] The monosodium citrate prepared by the above-mentioned various methods has a large water content, and the use of monosodium citrate raw materials in various fields has a moisture content requirement, that is, moisture≤0.5%, and usually only produces two crystal waters on the market at present. Monosodium citrate, the moisture content of this sodium citrate

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  • Preparation method of anhydrous monosodium citrate

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Effect test

Embodiment 1

[0028] A kind of production method of anhydrous monosodium citrate, comprises the following steps:

[0029] (a), with the sodium citrate of food grade anhydrous citric acid and food grade as raw material, the concrete reaction principle of this production method is as follows: CH 8 O7+Na 3 C 6 h 5 o 7 .2H 2 O→C 6 h 7 NaO 7 , the molecular structural formula of the obtained anhydrous monosodium citrate is as follows:

[0030]

[0031] (b), the sodium citrate of food grade anhydrous citric acid and food grade is dissolved into the solution that mass concentration is 30% respectively with purified water, forms anhydrous citric acid solution and sodium citrate solution, two kinds of solutions are according to 1 : The ratio of 0.9 is put into the evaporator;

[0032] (c), stir the mixed solution in the evaporator, add the aqueous solution of anhydrous citric acid and sodium citrate after the two react to adjust the pH value of the mixed solution to 3;

[0033] (d), the...

Embodiment 2

[0038] The difference between the present embodiment and the first embodiment is that the process parameters are different: the present embodiment comprises the following steps:

[0039] A kind of production method of anhydrous monosodium citrate, comprises the following steps:

[0040] (a), take food-grade anhydrous citric acid and food-grade sodium citrate as raw materials;

[0041] (b), the sodium citrate of food grade anhydrous citric acid and food grade is dissolved into the solution that mass concentration is 35% respectively with purified water, forms anhydrous citric acid solution and sodium citrate solution, two kinds of solutions are according to 1 : The ratio of 1.1 is put into the evaporator;

[0042] (c), stir the mixed solution in the evaporator, add the aqueous solution of anhydrous citric acid and sodium citrate after the two react to adjust the pH value of the mixed solution to 4;

[0043] (d), the mixed solution is left to stand, and crystal growth is carri...

Embodiment 3

[0048] The difference between this embodiment and the above two embodiments is that the process parameters are different: this embodiment includes the following steps:

[0049] A kind of production method of anhydrous monosodium citrate, comprises the following steps:

[0050] (a), take food-grade anhydrous citric acid and food-grade sodium citrate as raw materials;

[0051](b), the sodium citrate of food grade anhydrous citric acid and food grade is dissolved into the solution that mass concentration is 33% respectively with purified water, forms anhydrous citric acid solution and sodium citrate solution, two kinds of solutions are according to 1 :1 ratio into the evaporator;

[0052] (c), stir the mixed solution in the evaporator, add the aqueous solution of anhydrous citric acid and sodium citrate after the two react to adjust the pH value of the mixed solution to 3.5;

[0053] (d), the mixed solution is left to stand, and crystal growth is carried out after crystals appe...

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Abstract

The invention discloses a preparation method of anhydrous monosodium citrate. Food-grade anhydrous citric acid and food-grade sodium citrate are taken as raw materials, and the anhydrous monosodium citrate is prepared after the steps of proportioning mixing, stirring reaction , pH value adjusting, standing for crystallization, centrifugal separation, drying and the like. The anhydrous citric acidis acidic, the sodium citrate is alkaline, neutral reaction between the anhydrous citric acid and the sodium citrate is formed in an evaporator, the reaction is thorough, crystals are easily formed, the yield is high, the crystallization time in the evaporator is short, the concentration time is reduced, the energy consumption is reduced, the anhydrous citric acid and the sodium citrate are takenas raw materials, the process is simple, mother liquid can be recycled after formed monosodium citrate crystals are separated from the mother liquid , no carbon dioxide waste gas is generated during the reaction process, environmental pollution is avoided, and the method is clean and environmentally friendly and conforms to the basic state policies of energy saving and environmental protection.

Description

technical field [0001] The invention relates to the technical field of production of food, medicine, daily chemical additives, and chemical regulator raw materials, in particular to a production method of anhydrous monosodium citrate. Background technique [0002] Monosodium citrate is white granular crystal or powder, odorless, salty, soluble in water, almost insoluble in ethanol, slightly deliquescent in humid air, can be used as an acidity regulator in food processing, medicine, daily chemical and chemical production. [0003] Monosodium citrate is used as a food additive and has the largest demand. Mainly used as condiment, buffer, emulsifier and stabilizer, the usage amount is 0.2% to 0.3%, and it is often used in combination with citric acid in various jams, jellies, juices, beverages, cold drinks, dairy products, cakes, cheese and Nutritional supplement and flavoring agent for cooked ham, the dosage is about 2g / kg. When used in food processing, its pH value should ...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C51/43C07C59/265
CPCC07C51/412C07C51/43C07C59/265
Inventor 徐恒德张西进徐明民付廷胜
Owner DAZIRAN BIOLOGICAL GRP CO LTD
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