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Preparation method of dipotassium malate

A technology of dipotassium malate and malic acid, which is applied in the field of food processing, can solve the problems of increased solution viscosity, low yield, and unfavorable crystallization, and achieve the effects of increasing production and speeding up the synthesis rate

Pending Publication Date: 2022-05-06
河南瑞贝佳生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is more efficient in reducing tobacco irritation and miscellaneous gas than previous combustion accelerants. It is an ideal replacement product for cigarette combustion accelerants. Most of the current market is monopotassium malate, and some products require dipotassium malate with a lower acidity value. However, in the prior art, if the amount of malic acid is too much, the acidity value is too high and cannot reach the standard, and as the amount of potassium carbonate increases, the product changes from monopotassium malate to dipotassium malate, resulting in an increase in the viscosity of the solution. Crystallization, low yield

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  • Preparation method of dipotassium malate
  • Preparation method of dipotassium malate

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[0014] The invention provides a kind of preparation method of dipotassium malate, comprising the following steps:

[0015] S1. Mix malic acid and potassium carbonate in the solution, react at 50-80°C for 0.5-1h, wherein the molar ratio of malic acid and potassium carbonate is 1: (0.9-1.1), after the reaction, separate the solid and liquid , to obtain the filtrate;

[0016] S2. Concentrate the filtrate of step S1, add a crystallization accelerator, and the crystallization accelerator is any combination of two selected from propanol, ethanol, and acetone, dry after crystallization, and obtain a dipotassium malate product. It is found through research that propanol, ethanol and acetone all have a certain degree of hydrophilicity. After adding the concentrated solution, the crystallization can be significantly promoted, but it is still low. The combination of the two can further significantly increase the yield.

[0017] This application uses malic acid and potassium carbonate as...

Embodiment 1

[0024] The preparation method of the dipotassium malate provided by the present embodiment may further comprise the steps:

[0025] Step A, measure 200ml of distilled water into a beaker, weigh 150g of malic acid, add it to distilled water, stir to dissolve;

[0026] Step B, weigh 148.6g of potassium carbonate, add it to the above solution, and react at 70°C for 60min;

[0027] Step C, after the reaction is completed, filter, concentrate the filtrate to a density of 1.60g / mL, after concentration, it is not suitable for crystallization, add 10mL of crystallization-promoting solvent (4% of the volume of the concentrated solution), leave it for 60min to crystallize, suction filter, and dry to obtain Dipotassium malate product.

[0028] Propanol, ethanol, acetone, ethanol: acetone = 1:1, propanol: acetone = 1:1, ethanol and propanol = 1:1 were used as crystallization-promoting solvents, and no crystallization-promoting solvent was added as a control. Crystallization was carried ...

Embodiment 2

[0036] The preparation method of the dipotassium malate provided by the present embodiment may further comprise the steps:

[0037] Step A, measure 200ml of distilled water into a beaker, weigh 150g of malic acid, add it to distilled water, stir to dissolve;

[0038] Step B, weigh 148.6g of potassium carbonate, add to the above solution, react at 80°C for 60min;

[0039] Step C, after the reaction is completed, filter, and concentrate the filtrate to a density of 1.60g / mL. After concentration, it is not suitable for crystallization. Add 9ml of ethanol and acetone (volume ratio 1:1) (3.5% of the volume of the concentrated solution), and place it for 100min. Crystallization, suction filtration, and drying to obtain dipotassium malate product.

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Abstract

The invention discloses a preparation method of dipotassium malate, which comprises the following steps: S1, mixing malic acid and potassium carbonate in a solution, reacting at 50-80 DEG C for 0.5-1 hour, and after the reaction is finished, carrying out solid-liquid separation to obtain filtrate; s2, the filtrate is concentrated, a crystallization promoting agent is added, the crystallization promoting agent is a combination of any two of propyl alcohol, ethyl alcohol and acetone, drying is conducted after crystallization, and a dipotassium malate product is obtained. The malic acid and the potassium carbonate are used as raw materials and react at the high temperature of 50-80 DEG C, the synthesis rate of the dipotassium malate is increased, the yield of the dipotassium malate is increased by optimizing the dosage of the malic acid and the potassium carbonate, crystallization of the dipotassium malate is promoted by adding a proper crystallization promoting agent, and then the yield is further increased. The dipotassium malate prepared by the method is white crystal or powder, the acidity value (20%) is 0.5-3.8, and the yield can reach 80%.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a preparation method of dipotassium malate. Background technique [0002] Dipotassium malate (C 4 h 4 K 2 o 5 , also known as potassium malate), which is prepared by the reaction of malic acid and potassium carbonate, and can be used as a food additive, as a regulator, buffer, etc. Used in tobacco, it can accelerate the burning speed of tobacco, reduce tar emission, and make tobacco burn fully. It is more efficient in reducing tobacco irritation and miscellaneous gas than previous combustion accelerants. It is an ideal replacement product for cigarette combustion accelerants. Most of the current market is monopotassium malate, and some products require dipotassium malate with a lower acidity value. However, in the prior art, if the amount of malic acid is too much, the acidity value is too high and cannot reach the standard, and as the amount of potassium...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C51/43C07C59/245
CPCC07C51/412C07C51/43C07C59/245
Inventor 陈礼宝刘风莉李培杰李政康张辉艳田雪
Owner 河南瑞贝佳生物科技有限公司
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