Tianjin University

Nantong Licheng Biological Engineering Co. Ltd

Kaifei Zhao

Baohong Hou

Junbo Gong

Qiuxiang Yin

Jingkang Wang

Qinqing Gu

Shichao Du

Jiangbo Li

Yi Sun

Xiaohua Wu

Feng Jin

Haiyan Xi

Shiping Tang

Xin Pan

Zhongshi Liu

A method for preparing a new crystalline form of &#x3b3;-aminobutyric acid, including the steps of: S1: preparing a &#x3b3;-aminobutyric acid solution at an initial concentration of 0.5-1.0 g/mL by adding crude &#x3b3;-aminobutyric acid to water; adding an additive to the &#x3b3;-aminobutyric acid solution, raising the temperature to 50-80&#xb0; C., stirring to produce a clear solution; and S2: obtaining a suspension by evaporating water from the product of S1 under reduced pressure and at 50-80&#xb0; C.; obtaining a wet product by filtering the suspension; drying the wet product to obtain the new crystalline form of &#x3b3;-aminobutyric acid. The preparation method of the new crystalline form of &#x3b3;-aminobutyric acid is simple, easy to operate, low in energy consumption, economical and environmentally friendly. It is suitable for large-scale industrial production.

Crystalline form of gamma-aminobutyric acid and preparation method thereof

The present invention discloses a &#x3b3;-aminobutyric acid hemihydrate crystal, its molecular formula is CHNO.0.5HO. It also discloses a method of preparing a &#x3b3;-aminobutyric acid hemihydrate crystal, including first adding crude &#x3b3;-aminobutyric acid to water to prepare a &#x3b3;-aminobutyric acid suspension at an initial concentration of 1.2-2.0 g/mL; then stirring the suspension at a constant temperature of 5-10&#xb0; C. for 6-12 hours, followed by filtering and drying to obtain the &#x3b3;-aminobutyric acid hemihydrate crystal. The &#x3b3;-aminobutyric acid hemihydrate crystal is stable, does not easily absorb moisture and agglomerate, and is convenient for further processing and use. The crystal has a large main particle size, uniform particle size distribution, high bulk density, good flowability, and a purity of &#x2265;99%. The preparation method of the crystal according to the present invention is simple, easy to operate, highly efficient and low in energy consumption, and is suitable for large-scale industrial production.

Gamma-aminobutyric acid hemihydrate crystal and preparation method thereof

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Tianjin, China

Kaifei Zhao