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Methods for preparing and extracting betaine and betaine hydrochloride

An extraction method and betaine technology, which are applied in the preparation of organic compounds, chemical instruments and methods, and cyanide reaction preparation, etc., can solve the problems of low product purity, large consumption of raw materials, large investment, etc. The effect of low consumption, good product quality and low investment

Inactive Publication Date: 2010-10-20
房照智
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a method for preparing and extracting betaine and betaine hydrochloride, aiming to solve the problems of large investment, low product purity, or large unit consumption of raw materials commonly existing in existing production processes. Nowadays, The way of biological extraction can no longer meet the market demand. Improving the chemical synthesis method to prepare betaine with better quality is of great significance to promote large-scale production

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  • Methods for preparing and extracting betaine and betaine hydrochloride
  • Methods for preparing and extracting betaine and betaine hydrochloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1, the preparation of betaine concentrate

[0024] (1) Pour 30% sodium hydroxide solution into the reaction kettle, then add pure chloroacetic acid to the sodium hydroxide solution, start stirring and allow it to fully react, and keep the temperature at 30-45°C.

[0025] (2) When the temperature of the solution drops to 20-30°C, pour liquid trimethylamine into the reaction kettle, and stir to make it fully react.

[0026] (3) The betaine aqueous solution is placed in a concentration kettle and concentrated to 80% of the volume of the original solution.

[0027] (4) After separating and removing the precipitated sodium chloride crystals, the betaine concentrate is obtained.

[0028] 2. Preparation and extraction of anhydrous betaine

[0029] (1) The concentrated betaine solution is dried to remove the remaining 70-100% of water, and the temperature is kept at 100-120°C.

[0030] (2) Add liquid methanol to the obtained mixture at 1-3 times the amount, stir and heat to ...

Embodiment 2

[0043]Preparation and extraction of embodiment 2 anhydrous betaine

[0044] (1) Put the sodium hydroxide solution that the mass percent concentration is 40% into the reactor, then add chloroacetic acid in the sodium hydroxide solution, start stirring to make it fully react, and keep the temperature at 45°C; When cooling to 30°C, pour liquid trimethylamine into the reaction kettle, start stirring to make it fully react; after the reaction is completed, place the betaine mother liquor in a concentration kettle to concentrate, separate and remove the precipitated sodium chloride crystals, and obtain betaine The concentrated solution; the mol ratio of sodium hydroxide, chloroacetic acid and trimethylamine in the sodium hydroxide solution is sodium hydroxide: chloroacetic acid: trimethylamine=1:1:1.

[0045] (2) Drying the concentrated solution of the synthesized betaine to remove the remaining 99.9% of water, the temperature is controlled at 120°C; then adding methanol to it with ...

Embodiment 3

[0048] Preparation and extraction of embodiment 3 anhydrous betaine

[0049] (1) Put the sodium hydroxide solution that is 25% by mass percent concentration into the reactor, then add chloroacetic acid to the sodium hydroxide solution, start stirring to make it fully react, and keep the temperature at 40°C; When cooling to 25°C, pour liquid trimethylamine into the reaction kettle, start stirring to make it fully react; after the reaction is completed, place the betaine mother liquor in a concentration kettle to concentrate, separate and remove the precipitated sodium chloride crystals, and obtain betaine The concentrated solution; the mol ratio of sodium hydroxide, chloroacetic acid and trimethylamine in the sodium hydroxide solution is sodium hydroxide: chloroacetic acid: trimethylamine=1:1:1.

[0050] (2) Drying the concentrated solution of the synthesized betaine to remove the remaining 99.95% of the water, the temperature is controlled at 150°C; then adding methanol to it ...

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Abstract

The invention discloses methods for preparing and extracting betaine and betaine hydrochloride. The method for preparing and extracting the betaine comprises the following steps of: performing neutralization reaction on sodium hydroxide solution and chloroacetic acid, when the solution temperature is reduced to between 20 and 60 DEG C, introducing liquid trimethylamine into a reaction kettle, stirring and performing full reaction; drying to dehydrate; and extracting high-purity betaine crystals by taking absolute methanol as an extracting agent through crystallization and the other means. Themethod for preparing and extracting the betaine hydrochloride comprises the following steps of: preparing a betaine hydrochloride crude product by directly adopting liquid-liquid reaction; and dryingto dehydrate to obtain the pure betaine hydrochloride. Compared with the commonly adopted vacuum distillation method, iron exchange method, membrane separation method and other methods, the methods have the advantages of obviously low investment, good product quality, low unit consumption of raw materials and the like, and have good promotion value and market prospect.

Description

technical field [0001] The invention provides a preparation and extraction method of betaine and betaine hydrochloride, which belongs to the technical field of preparation of betaine and its hydrochloride, and specifically relates to a method for preparing and extracting high-purity betaine by combining chemical and physical principles Betaine, betaine hydrochloride. Background technique [0002] The chemical name of betaine is betaine, and its molecular formula is: C 5 h 11 NO 2 , Molecular weight: 117.15, white fluid crystal powder, melting point: 293°C (decomposition). Dry basis content requirement ≥ 99%, betaine hydrochloride molecular formula is: C 5 h 11 NO 2 HCl, molecular weight: 153.6, is white to slightly yellow crystalline powder, with sour taste, easily soluble in water and ethanol, insoluble in ether and chloroform, and reacts with alkali. The melting point is 241-242°C, and the content of betaine hydrochloride should be ≥98%. [0003] Betaine has the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/12C07C227/08C07C227/18C07C227/40
Inventor 房照智段俊秀
Owner 房照智
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