Preparation method of ammonium lactate solids

An ammonium lactate and solid technology, applied in the field of medicine and chemical industry, can solve the problems of difficulty in preparing ammonium lactate solid in large quantities and stably, low reproducibility, long time consumption and the like

Active Publication Date: 2015-08-26
BEIJING ENCHENG KANGTAI BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method takes a long time, and the reproducibility is low, it is difficult to prepare a large amount of ammonium lactate solid stably

Method used

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  • Preparation method of ammonium lactate solids

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Embodiment 1

[0023] 1) Preparation of ammonium lactate solution

[0024] Put 1.0L of lactic acid solution into a 20L reaction kettle, add concentrated ammonia water to the reaction system at room temperature, adjust the pH value of the system to 8.0-9.0, and consume a total of about 2.0L of concentrated ammonia water. The temperature of the reaction system was raised to 60°C, and the reaction was carried out under heat preservation and stirring. During the reaction, the pH value of the system was controlled at 8.0-9.0 by adding ammonia water, and about 0.8 L of ammonia water was added in total. After heating for 5 hours, the reaction was stopped, and the temperature was lowered to room temperature to obtain a total of about 3.8 L of ammonium lactate solution.

[0025] 2) Preparation of ammonium lactate concentrate

[0026] Add 11.4 L of acetonitrile to the above ammonium lactate solution, stir at room temperature for 2 h, stop stirring, and let stand at room temperature for 2 h, the react...

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Abstract

The invention belongs to the technical field of pharmaceutical and chemical engineering, and relates to a preparation method of ammonium lactate solids, in particular to a method for changing an ammonium lactate solution into the ammonium lactate solids. The preparation method of the ammonium lactate solids mainly comprises steps as follows: 1) preparation of the ammonium lactate solution : a lactic acid solution reacts with ammonia water to produce the ammonium lactate solution; 2) preparation of a concentrated ammonium lactate solution : the ammonium lactate solution is extracted with acetonitrile and concentrated, and the concentrated ammonium lactate solution is obtained; 3) preparation of the ammonium lactate solids: the concentrated ammonium lactate solution is dissolved in ethanol, acetonitrile, acetone or a acetonitrile and acetone mixed solution is added, and the solids are precipitated. The ammonium lactate solid products prepared with the preparation method of the ammonium lactate solids are high in purity, good in stability, easy to store and transport and suitable for mass industrial production.

Description

[0001] Field [0002] This patent relates to a method for preparing ammonium lactate solid, in particular to a method for converting ammonium lactate solution into ammonium lactate solid. It belongs to the field of medicine and chemical industry. Background technique [0003] Ammonium lactate is a chemical reagent widely used in food, beverage, dairy products, salt, nutrient solution, medicine, etc. Ammonium lactate products currently on the market mainly exist in the form of ammonium lactate solution or ammonium lactate liquid. The stability of ammonium lactate products in liquid form is poor, and lactic anhydride and 2-(2-hydroxypropionyloxy) are easily produced during preparation and storage. Base) impurities such as amine propionate, and it is difficult to remove. There are few reports on the preparation process of ammonium lactate solid. In the document "Preparation and Properties of Pure Ammonium DL-Lactate" (J.Am.Chem.Soc., 1953, 75 (5), 1242-1244), E.J.Costello et al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C51/43C07C59/08
CPCC07C51/412C07C51/43C07C59/08
Inventor 卢建勋孙占国田小飞张晟源王锡亭
Owner BEIJING ENCHENG KANGTAI BIOLOGICAL TECH
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